/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:59:24,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:59:24,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:59:24,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:59:24,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:59:24,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:59:24,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:59:24,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:59:24,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:59:24,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:59:24,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:59:24,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:59:24,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:59:24,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:59:24,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:59:24,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:59:24,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:59:24,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:59:24,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:59:24,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:59:24,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:59:24,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:59:24,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:59:24,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:59:24,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:59:24,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:59:24,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:59:24,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:59:24,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:59:24,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:59:24,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:59:24,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:59:24,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:59:24,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:59:24,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:59:24,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:59:24,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:59:24,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:59:24,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:59:24,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:59:24,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:59:24,959 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 [2020-10-14 17:59:24,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:59:24,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:59:24,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:59:24,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:59:24,985 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:59:24,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:59:24,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:59:24,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:59:24,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:59:24,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:59:24,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:59:24,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:59:24,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:59:24,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:59:24,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:59:24,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:59:24,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:59:24,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:59:24,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:59:24,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:59:24,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:59:24,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:59:24,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:59:24,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:59:24,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:59:24,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:59:24,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:59:24,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:59:24,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:59:24,993 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:59:25,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:59:25,393 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:59:25,406 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:59:25,409 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:59:25,409 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:59:25,410 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2020-10-14 17:59:25,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3576544f0/aabde9947c9447c5812839e693a82722/FLAG44f3bfaf6 [2020-10-14 17:59:26,013 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:59:26,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2020-10-14 17:59:26,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3576544f0/aabde9947c9447c5812839e693a82722/FLAG44f3bfaf6 [2020-10-14 17:59:26,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3576544f0/aabde9947c9447c5812839e693a82722 [2020-10-14 17:59:26,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:59:26,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:59:26,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:59:26,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:59:26,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:59:26,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:59:26" (1/1) ... [2020-10-14 17:59:26,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66214dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26, skipping insertion in model container [2020-10-14 17:59:26,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:59:26" (1/1) ... [2020-10-14 17:59:26,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:59:26,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:59:26,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:59:26,561 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:59:26,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:59:26,606 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:59:26,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26 WrapperNode [2020-10-14 17:59:26,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:59:26,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:59:26,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:59:26,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:59:26,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26" (1/1) ... [2020-10-14 17:59:26,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26" (1/1) ... [2020-10-14 17:59:26,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26" (1/1) ... [2020-10-14 17:59:26,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26" (1/1) ... [2020-10-14 17:59:26,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26" (1/1) ... [2020-10-14 17:59:26,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26" (1/1) ... [2020-10-14 17:59:26,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26" (1/1) ... [2020-10-14 17:59:26,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:59:26,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:59:26,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:59:26,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:59:26,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26" (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 [2020-10-14 17:59:26,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:59:26,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:59:26,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:59:26,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:59:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:59:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:59:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:59:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:59:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:59:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:59:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:59:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:59:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:59:27,066 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:59:27,067 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-14 17:59:27,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:59:27 BoogieIcfgContainer [2020-10-14 17:59:27,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:59:27,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:59:27,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:59:27,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:59:27,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:59:26" (1/3) ... [2020-10-14 17:59:27,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1caa00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:59:27, skipping insertion in model container [2020-10-14 17:59:27,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:59:26" (2/3) ... [2020-10-14 17:59:27,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1caa00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:59:27, skipping insertion in model container [2020-10-14 17:59:27,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:59:27" (3/3) ... [2020-10-14 17:59:27,082 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-2.i [2020-10-14 17:59:27,095 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:59:27,107 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:59:27,130 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:59:27,168 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:59:27,169 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:59:27,169 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:59:27,169 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:59:27,170 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:59:27,170 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:59:27,170 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:59:27,170 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:59:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-14 17:59:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 17:59:27,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:27,208 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] [2020-10-14 17:59:27,209 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:27,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1721973062, now seen corresponding path program 1 times [2020-10-14 17:59:27,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:27,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698032638] [2020-10-14 17:59:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:27,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:27,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:27,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:27,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:27,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:28,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:28,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 17:59:28,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:59:28,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 887 [2020-10-14 17:59:28,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:28,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:59:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:59:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:59:28,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:59:28,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:28,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:28,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:28,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:28,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:28,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:59:28,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:28,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:28,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:28,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:28,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:28,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:59:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:59:28,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698032638] [2020-10-14 17:59:28,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:59:28,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:59:28,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043723514] [2020-10-14 17:59:28,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:59:28,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:59:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:59:28,397 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2020-10-14 17:59:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:28,566 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2020-10-14 17:59:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:59:28,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-14 17:59:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:28,579 INFO L225 Difference]: With dead ends: 60 [2020-10-14 17:59:28,580 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 17:59:28,584 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 [2020-10-14 17:59:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 17:59:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 17:59:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 17:59:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-14 17:59:28,647 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-14 17:59:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:28,648 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-14 17:59:28,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:59:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-14 17:59:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 17:59:28,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:28,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:28,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:59:28,650 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:28,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:28,651 INFO L82 PathProgramCache]: Analyzing trace with hash -927642988, now seen corresponding path program 1 times [2020-10-14 17:59:28,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:28,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031523478] [2020-10-14 17:59:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:28,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:28,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:28,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:28,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:28,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:31,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:33,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:33,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 17:59:33,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:33,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:59:33,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:33,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:59:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 17:59:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 17:59:33,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 17:59:33,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:33,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:33,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:33,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:33,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:33,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:59:33,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:33,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:33,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:33,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:33,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:33,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:59:33,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031523478] [2020-10-14 17:59:33,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:33,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:59:33,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444416103] [2020-10-14 17:59:33,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:59:33,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:33,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:59:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:59:33,881 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 10 states. [2020-10-14 17:59:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:34,229 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-14 17:59:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:59:34,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 17:59:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:34,234 INFO L225 Difference]: With dead ends: 56 [2020-10-14 17:59:34,234 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 17:59:34,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:59:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 17:59:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-10-14 17:59:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 17:59:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-14 17:59:34,253 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 26 [2020-10-14 17:59:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:34,254 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-14 17:59:34,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:59:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-14 17:59:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 17:59:34,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:34,256 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:34,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:59:34,256 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash -783240192, now seen corresponding path program 2 times [2020-10-14 17:59:34,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:34,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231940944] [2020-10-14 17:59:34,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:34,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:34,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:34,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:34,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:34,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:37,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:39,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:39,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 17:59:39,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:39,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:59:39,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:39,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:39,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:59:39,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 17:59:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:59:39,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:39,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:39,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:39,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:39,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:39,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:39,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:59:39,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:39,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:39,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:39,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:59:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:59:39,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231940944] [2020-10-14 17:59:39,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:39,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:59:39,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520991115] [2020-10-14 17:59:39,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:59:39,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:39,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:59:39,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:59:39,479 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2020-10-14 17:59:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:39,878 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-10-14 17:59:39,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:59:39,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-14 17:59:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:39,884 INFO L225 Difference]: With dead ends: 67 [2020-10-14 17:59:39,885 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 17:59:39,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:59:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 17:59:39,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2020-10-14 17:59:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 17:59:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-14 17:59:39,909 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 27 [2020-10-14 17:59:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:39,910 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-14 17:59:39,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:59:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-14 17:59:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 17:59:39,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:39,911 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:39,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:59:39,912 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash -601720812, now seen corresponding path program 3 times [2020-10-14 17:59:39,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:39,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253743605] [2020-10-14 17:59:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:39,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:39,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:39,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:39,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:39,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:42,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:44,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:44,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 17:59:44,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:44,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:59:44,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:44,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:59:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 17:59:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 17:59:44,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:45,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:45,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:45,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:45,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:45,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:59:45,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:45,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:45,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:59:45,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253743605] [2020-10-14 17:59:45,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:45,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:59:45,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527604109] [2020-10-14 17:59:45,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:59:45,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:59:45,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:59:45,093 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 12 states. [2020-10-14 17:59:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:45,462 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2020-10-14 17:59:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:59:45,464 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 17:59:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:45,465 INFO L225 Difference]: With dead ends: 71 [2020-10-14 17:59:45,465 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 17:59:45,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:59:45,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 17:59:45,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 41. [2020-10-14 17:59:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 17:59:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-14 17:59:45,484 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 28 [2020-10-14 17:59:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:45,485 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-14 17:59:45,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:59:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-14 17:59:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 17:59:45,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:45,491 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:45,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:59:45,492 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:45,492 INFO L82 PathProgramCache]: Analyzing trace with hash 730412672, now seen corresponding path program 4 times [2020-10-14 17:59:45,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:45,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170323698] [2020-10-14 17:59:45,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:45,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:45,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:45,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:45,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:48,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:50,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:50,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 17:59:50,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:50,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:59:50,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:50,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:50,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:59:50,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 17:59:50,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:59:50,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:50,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:50,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:50,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:50,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:50,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:50,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:59:50,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:50,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:59:50,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170323698] [2020-10-14 17:59:50,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:50,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:59:50,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690765714] [2020-10-14 17:59:50,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:59:50,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:50,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:59:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:59:50,778 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 13 states. [2020-10-14 17:59:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:51,146 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2020-10-14 17:59:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:59:51,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-14 17:59:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:51,150 INFO L225 Difference]: With dead ends: 75 [2020-10-14 17:59:51,150 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 17:59:51,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:59:51,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 17:59:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 42. [2020-10-14 17:59:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 17:59:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-14 17:59:51,176 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 29 [2020-10-14 17:59:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:51,176 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-14 17:59:51,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:59:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-14 17:59:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 17:59:51,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:51,180 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:51,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:59:51,180 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash -923122284, now seen corresponding path program 5 times [2020-10-14 17:59:51,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:51,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101995517] [2020-10-14 17:59:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:51,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:51,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:51,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:51,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:51,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:54,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:56,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:56,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 17:59:56,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:59:56,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 17:59:56,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:56,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:59:56,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 17:59:56,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 17:59:56,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:56,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:59:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:56,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:56,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:59:56,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:59:56,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:59:56,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:59:56,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:59:56,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:59:56,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:59:56,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:59:56,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:59:56,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:59:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 17:59:56,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101995517] [2020-10-14 17:59:56,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:59:56,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:59:56,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100128682] [2020-10-14 17:59:56,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:59:56,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:59:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:59:56,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:59:56,443 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 14 states. [2020-10-14 17:59:56,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:59:56,786 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2020-10-14 17:59:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:59:56,790 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-14 17:59:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:59:56,792 INFO L225 Difference]: With dead ends: 79 [2020-10-14 17:59:56,796 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 17:59:56,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:59:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 17:59:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 43. [2020-10-14 17:59:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 17:59:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-14 17:59:56,817 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 30 [2020-10-14 17:59:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:59:56,818 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-14 17:59:56,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:59:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-14 17:59:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 17:59:56,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:59:56,819 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:59:56,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:59:56,820 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:59:56,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:59:56,820 INFO L82 PathProgramCache]: Analyzing trace with hash -643098368, now seen corresponding path program 6 times [2020-10-14 17:59:56,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:59:56,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252398515] [2020-10-14 17:59:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:59:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:59:56,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:56,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:56,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:56,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:56,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:59:59,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:01,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:01,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:00:01,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:01,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4588 [2020-10-14 18:00:01,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:01,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:01,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:00:01,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:00:01,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:00:01,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:01,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:01,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:01,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:01,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:01,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:01,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:01,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:01,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:01,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:01,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:01,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:01,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:00:01,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252398515] [2020-10-14 18:00:01,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:01,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:00:01,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695983514] [2020-10-14 18:00:01,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:00:01,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:01,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:00:01,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:00:01,713 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 15 states. [2020-10-14 18:00:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:02,057 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2020-10-14 18:00:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:00:02,057 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-14 18:00:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:02,059 INFO L225 Difference]: With dead ends: 83 [2020-10-14 18:00:02,059 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 18:00:02,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:00:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 18:00:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 44. [2020-10-14 18:00:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 18:00:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-14 18:00:02,067 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 31 [2020-10-14 18:00:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:02,068 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-14 18:00:02,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:00:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-14 18:00:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 18:00:02,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:02,069 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:02,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:00:02,069 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:02,070 INFO L82 PathProgramCache]: Analyzing trace with hash -552291564, now seen corresponding path program 7 times [2020-10-14 18:00:02,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:02,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749224766] [2020-10-14 18:00:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:02,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:02,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:07,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 18:00:07,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:07,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4944 [2020-10-14 18:00:07,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:07,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:07,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:00:07,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:00:07,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:00:07,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:07,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:07,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:07,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:07,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:07,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:07,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:07,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:07,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:07,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:07,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:07,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:00:07,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749224766] [2020-10-14 18:00:07,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:07,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:00:07,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665578866] [2020-10-14 18:00:07,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:00:07,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:07,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:00:07,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:00:07,341 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 16 states. [2020-10-14 18:00:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:07,805 INFO L93 Difference]: Finished difference Result 87 states and 121 transitions. [2020-10-14 18:00:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:00:07,806 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-14 18:00:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:07,807 INFO L225 Difference]: With dead ends: 87 [2020-10-14 18:00:07,808 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 18:00:07,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:00:07,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 18:00:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 45. [2020-10-14 18:00:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 18:00:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-10-14 18:00:07,817 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 32 [2020-10-14 18:00:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:07,818 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-10-14 18:00:07,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:00:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-10-14 18:00:07,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 18:00:07,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:07,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:07,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:00:07,819 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:07,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1175041461, now seen corresponding path program 1 times [2020-10-14 18:00:07,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:07,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096159855] [2020-10-14 18:00:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:07,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:07,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:08,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:12,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:00:12,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:00:12,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4982 [2020-10-14 18:00:12,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:12,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:12,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:00:12,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 18:00:12,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:00:12,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:12,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:12,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:12,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:12,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:12,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:12,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:12,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:12,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:12,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:12,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:12,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 18:00:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:12,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:12,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:12,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:12,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:00:12,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:00:12,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:00:12,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:00:12,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096159855] [2020-10-14 18:00:12,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:12,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:00:12,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765132381] [2020-10-14 18:00:12,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:00:12,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:12,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:00:12,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:00:12,969 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 12 states. [2020-10-14 18:00:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:13,330 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2020-10-14 18:00:13,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:00:13,331 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-14 18:00:13,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:13,332 INFO L225 Difference]: With dead ends: 62 [2020-10-14 18:00:13,332 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:00:13,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:00:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:00:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-10-14 18:00:13,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 18:00:13,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-14 18:00:13,341 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2020-10-14 18:00:13,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:13,341 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-14 18:00:13,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:00:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-14 18:00:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:00:13,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:13,342 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:13,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:00:13,343 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:13,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:13,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2032247936, now seen corresponding path program 8 times [2020-10-14 18:00:13,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:13,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881287635] [2020-10-14 18:00:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:13,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:13,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:13,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:13,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:13,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:16,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:18,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:00:18,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:18,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:00:18,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:18,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:18,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:00:18,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:00:18,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:00:18,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:18,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:18,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:18,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:18,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:18,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:18,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:18,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:18,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:18,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:18,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:18,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:18,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:00:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:00:18,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881287635] [2020-10-14 18:00:18,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:18,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:00:18,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283064564] [2020-10-14 18:00:18,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:00:18,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:18,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:00:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:00:18,691 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 17 states. [2020-10-14 18:00:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:19,086 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2020-10-14 18:00:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:00:19,087 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-14 18:00:19,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:19,088 INFO L225 Difference]: With dead ends: 72 [2020-10-14 18:00:19,088 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 18:00:19,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:00:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 18:00:19,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 35. [2020-10-14 18:00:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 18:00:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-14 18:00:19,097 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 33 [2020-10-14 18:00:19,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:19,097 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-14 18:00:19,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:00:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-14 18:00:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 18:00:19,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:19,098 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:19,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:00:19,099 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:19,099 INFO L82 PathProgramCache]: Analyzing trace with hash -666255212, now seen corresponding path program 9 times [2020-10-14 18:00:19,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:19,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827172182] [2020-10-14 18:00:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:19,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:19,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:19,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:19,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:19,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:24,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:24,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 18:00:24,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:24,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:00:24,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:24,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:24,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:00:24,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:00:24,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:00:24,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:24,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:24,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:24,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:24,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:24,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:24,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:24,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:24,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:24,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:24,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:24,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:24,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:00:24,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827172182] [2020-10-14 18:00:24,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:24,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:00:24,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063080704] [2020-10-14 18:00:24,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:00:24,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:24,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:00:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:00:24,504 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 18 states. [2020-10-14 18:00:24,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:24,898 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2020-10-14 18:00:24,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:00:24,899 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-14 18:00:24,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:24,900 INFO L225 Difference]: With dead ends: 76 [2020-10-14 18:00:24,900 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 18:00:24,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:00:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 18:00:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2020-10-14 18:00:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 18:00:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-14 18:00:24,908 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 34 [2020-10-14 18:00:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:24,909 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-14 18:00:24,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:00:24,909 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-14 18:00:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 18:00:24,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:24,910 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:24,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:00:24,910 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1270153728, now seen corresponding path program 10 times [2020-10-14 18:00:24,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:24,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966682559] [2020-10-14 18:00:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:24,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:24,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:24,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:24,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:24,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:28,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:29,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:29,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:00:29,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:29,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:00:29,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:29,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:29,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:00:29,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:00:29,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:00:29,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:30,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:30,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:30,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:30,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:30,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:30,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:30,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:30,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:30,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:30,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:30,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:30,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:00:30,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966682559] [2020-10-14 18:00:30,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:30,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:00:30,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326196034] [2020-10-14 18:00:30,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:00:30,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:00:30,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:00:30,366 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 19 states. [2020-10-14 18:00:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:30,843 INFO L93 Difference]: Finished difference Result 80 states and 114 transitions. [2020-10-14 18:00:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:00:30,844 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-14 18:00:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:30,846 INFO L225 Difference]: With dead ends: 80 [2020-10-14 18:00:30,846 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 18:00:30,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:00:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 18:00:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 37. [2020-10-14 18:00:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:00:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-14 18:00:30,855 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 35 [2020-10-14 18:00:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:30,855 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-14 18:00:30,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:00:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-14 18:00:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:00:30,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:30,856 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:30,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:00:30,856 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1483828756, now seen corresponding path program 11 times [2020-10-14 18:00:30,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:30,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848718611] [2020-10-14 18:00:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:30,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:30,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:30,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:30,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:30,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:35,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:35,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:35,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:00:35,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:35,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:00:35,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:35,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:00:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:00:35,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:00:35,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:36,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:36,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:36,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:36,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:36,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:36,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:36,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:36,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:36,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:00:36,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848718611] [2020-10-14 18:00:36,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:36,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:00:36,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018150803] [2020-10-14 18:00:36,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:00:36,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:36,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:00:36,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:00:36,337 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 20 states. [2020-10-14 18:00:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:36,808 INFO L93 Difference]: Finished difference Result 84 states and 121 transitions. [2020-10-14 18:00:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:00:36,809 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-14 18:00:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:36,810 INFO L225 Difference]: With dead ends: 84 [2020-10-14 18:00:36,810 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 18:00:36,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:00:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 18:00:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 38. [2020-10-14 18:00:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 18:00:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-14 18:00:36,837 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 36 [2020-10-14 18:00:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:36,838 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-14 18:00:36,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:00:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-14 18:00:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 18:00:36,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:36,839 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:36,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:00:36,839 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:36,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:36,840 INFO L82 PathProgramCache]: Analyzing trace with hash 957939840, now seen corresponding path program 12 times [2020-10-14 18:00:36,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:36,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352606214] [2020-10-14 18:00:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:36,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:36,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:36,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:36,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:41,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:41,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:41,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 18:00:41,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:41,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:00:41,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:41,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:41,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:00:41,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:00:41,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:00:41,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:42,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:42,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:42,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:42,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:42,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:42,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:00:42,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:42,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:00:42,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352606214] [2020-10-14 18:00:42,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:42,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:00:42,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935886972] [2020-10-14 18:00:42,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:00:42,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:00:42,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:00:42,429 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 21 states. [2020-10-14 18:00:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:42,941 INFO L93 Difference]: Finished difference Result 88 states and 128 transitions. [2020-10-14 18:00:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:00:42,942 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-14 18:00:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:42,944 INFO L225 Difference]: With dead ends: 88 [2020-10-14 18:00:42,944 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 18:00:42,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:00:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 18:00:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 39. [2020-10-14 18:00:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 18:00:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-14 18:00:42,953 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 37 [2020-10-14 18:00:42,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:42,954 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-14 18:00:42,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:00:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-14 18:00:42,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:00:42,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:42,955 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:42,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:00:42,955 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:42,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1835252628, now seen corresponding path program 13 times [2020-10-14 18:00:42,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:42,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368255896] [2020-10-14 18:00:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:42,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:42,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:42,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:42,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:43,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:47,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:47,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:47,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:00:47,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:00:47,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:00:47,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:47,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:00:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:00:47,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:00:47,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:48,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:48,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:48,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:48,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:48,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:48,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:48,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:48,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:48,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:48,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:00:48,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368255896] [2020-10-14 18:00:48,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:48,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:00:48,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414978886] [2020-10-14 18:00:48,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:00:48,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:48,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:00:48,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:00:48,579 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 22 states. [2020-10-14 18:00:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:49,105 INFO L93 Difference]: Finished difference Result 92 states and 135 transitions. [2020-10-14 18:00:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:00:49,106 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-10-14 18:00:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:49,107 INFO L225 Difference]: With dead ends: 92 [2020-10-14 18:00:49,107 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 18:00:49,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:00:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 18:00:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 40. [2020-10-14 18:00:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 18:00:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-14 18:00:49,116 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 38 [2020-10-14 18:00:49,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:49,116 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-14 18:00:49,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:00:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-14 18:00:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 18:00:49,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:49,117 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:49,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:00:49,118 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:49,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1032822016, now seen corresponding path program 14 times [2020-10-14 18:00:49,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:49,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246388229] [2020-10-14 18:00:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:49,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:49,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:49,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:49,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:49,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:54,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:54,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 18:00:54,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:00:54,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:00:54,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:54,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:54,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:00:54,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:00:54,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:00:54,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:54,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:54,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:54,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:54,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:54,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:54,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:54,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:54,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:54,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:00:54,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246388229] [2020-10-14 18:00:54,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:54,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:00:54,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651566456] [2020-10-14 18:00:54,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:00:54,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:54,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:00:54,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:00:54,298 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 18 states. [2020-10-14 18:00:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:00:54,643 INFO L93 Difference]: Finished difference Result 129 states and 193 transitions. [2020-10-14 18:00:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:00:54,644 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-14 18:00:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:00:54,645 INFO L225 Difference]: With dead ends: 129 [2020-10-14 18:00:54,645 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 18:00:54,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:00:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 18:00:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-14 18:00:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 18:00:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-14 18:00:54,671 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 39 [2020-10-14 18:00:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:00:54,671 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-14 18:00:54,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:00:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-14 18:00:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 18:00:54,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:00:54,672 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:00:54,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:00:54,673 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:00:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:00:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1103546028, now seen corresponding path program 15 times [2020-10-14 18:00:54,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:00:54,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318353024] [2020-10-14 18:00:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:00:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:54,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:54,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:54,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:54,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:59,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:59,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 18:00:59,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:00:59,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:00:59,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:59,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:59,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:00:59,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 18:00:59,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 18:00:59,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:00:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:00:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:00:59,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:00:59,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:00:59,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:00:59,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:00:59,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:00:59,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:00:59,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:00:59,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:00:59,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:00:59,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:00:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-10-14 18:00:59,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318353024] [2020-10-14 18:00:59,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:00:59,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:00:59,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249024519] [2020-10-14 18:00:59,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:00:59,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:00:59,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:00:59,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:00:59,891 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 19 states. [2020-10-14 18:01:00,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:00,136 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2020-10-14 18:01:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:01:00,136 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2020-10-14 18:01:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:00,138 INFO L225 Difference]: With dead ends: 177 [2020-10-14 18:01:00,138 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 18:01:00,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:01:00,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 18:01:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-14 18:01:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 18:01:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-14 18:01:00,156 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 96 [2020-10-14 18:01:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:00,156 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-14 18:01:00,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:01:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-14 18:01:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 18:01:00,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:00,157 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:00,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:01:00,158 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:00,158 INFO L82 PathProgramCache]: Analyzing trace with hash -831837630, now seen corresponding path program 16 times [2020-10-14 18:01:00,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:00,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560470930] [2020-10-14 18:01:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:00,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:00,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:00,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:05,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-14 18:01:05,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:05,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:01:05,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:05,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:05,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:01:05,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 18:01:05,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:01:05,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:05,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:05,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:05,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:05,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:05,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:05,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:05,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:05,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:05,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:05,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:05,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:05,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-10-14 18:01:05,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560470930] [2020-10-14 18:01:05,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:05,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:01:05,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975275990] [2020-10-14 18:01:05,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:01:05,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:01:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:01:05,482 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 20 states. [2020-10-14 18:01:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:05,846 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2020-10-14 18:01:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:01:05,847 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-10-14 18:01:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:05,849 INFO L225 Difference]: With dead ends: 186 [2020-10-14 18:01:05,849 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 18:01:05,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:01:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 18:01:05,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-14 18:01:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 18:01:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-14 18:01:05,905 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 101 [2020-10-14 18:01:05,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:05,908 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-14 18:01:05,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:01:05,908 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-14 18:01:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 18:01:05,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:05,910 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:05,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:01:05,911 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash 855925908, now seen corresponding path program 17 times [2020-10-14 18:01:05,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:05,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863305350] [2020-10-14 18:01:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:05,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:06,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:06,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:06,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:10,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:10,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 18:01:10,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:10,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 18:01:10,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:10,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:01:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 18:01:10,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:01:10,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:11,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:11,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:11,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:11,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:11,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:11,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:11,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:11,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:11,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:11,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:11,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:11,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-10-14 18:01:11,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863305350] [2020-10-14 18:01:11,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:11,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:01:11,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839643641] [2020-10-14 18:01:11,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:01:11,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:11,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:01:11,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:01:11,193 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 21 states. [2020-10-14 18:01:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:11,507 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-14 18:01:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:01:11,508 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-10-14 18:01:11,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:11,509 INFO L225 Difference]: With dead ends: 195 [2020-10-14 18:01:11,509 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 18:01:11,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:01:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 18:01:11,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-14 18:01:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 18:01:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-14 18:01:11,540 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 106 [2020-10-14 18:01:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:11,540 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-14 18:01:11,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:01:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-14 18:01:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 18:01:11,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:11,542 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:11,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:01:11,542 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:11,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:11,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1813726594, now seen corresponding path program 18 times [2020-10-14 18:01:11,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:11,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978225005] [2020-10-14 18:01:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:11,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:11,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:11,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:12,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:16,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:16,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 18:01:16,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:16,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:01:16,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:16,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:16,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:01:16,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-14 18:01:16,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:01:16,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:16,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:16,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:16,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:16,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:16,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:16,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:16,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:16,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:16,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:16,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-10-14 18:01:16,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978225005] [2020-10-14 18:01:16,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:16,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:01:16,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862322601] [2020-10-14 18:01:16,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:01:16,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:16,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:01:16,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:01:16,923 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 22 states. [2020-10-14 18:01:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:17,353 INFO L93 Difference]: Finished difference Result 204 states and 216 transitions. [2020-10-14 18:01:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:01:17,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2020-10-14 18:01:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:17,355 INFO L225 Difference]: With dead ends: 204 [2020-10-14 18:01:17,355 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 18:01:17,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:01:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 18:01:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-14 18:01:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 18:01:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-14 18:01:17,407 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 111 [2020-10-14 18:01:17,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:17,407 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-14 18:01:17,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:01:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-14 18:01:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 18:01:17,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:17,410 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:17,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:01:17,411 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:17,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:17,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1230274516, now seen corresponding path program 19 times [2020-10-14 18:01:17,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:17,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583770938] [2020-10-14 18:01:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:17,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:17,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:17,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:18,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:22,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:22,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 18:01:22,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:22,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 18:01:22,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:22,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:01:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 18:01:22,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:01:22,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:22,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:22,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:22,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:22,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:22,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:22,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:01:22,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:22,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:22,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:22,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:22,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:22,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-10-14 18:01:22,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583770938] [2020-10-14 18:01:22,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:22,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:01:22,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668061375] [2020-10-14 18:01:22,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:01:22,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:22,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:01:22,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:01:22,741 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 23 states. [2020-10-14 18:01:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:23,066 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2020-10-14 18:01:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:01:23,066 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2020-10-14 18:01:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:23,068 INFO L225 Difference]: With dead ends: 213 [2020-10-14 18:01:23,068 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 18:01:23,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:01:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 18:01:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-14 18:01:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 18:01:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-14 18:01:23,098 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 116 [2020-10-14 18:01:23,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:23,099 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-14 18:01:23,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:01:23,099 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-14 18:01:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-14 18:01:23,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:23,100 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:23,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:01:23,101 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:23,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:23,101 INFO L82 PathProgramCache]: Analyzing trace with hash 433828034, now seen corresponding path program 20 times [2020-10-14 18:01:23,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:23,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793251752] [2020-10-14 18:01:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:23,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:23,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:23,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:23,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:28,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:28,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 18:01:28,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:28,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:01:28,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:28,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:01:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 18:01:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:01:28,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:28,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:28,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:28,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:28,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:28,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:28,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:28,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:28,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:28,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:28,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:28,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-14 18:01:28,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793251752] [2020-10-14 18:01:28,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:28,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:01:28,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389461110] [2020-10-14 18:01:28,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:01:28,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:28,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:01:28,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:01:28,452 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 24 states. [2020-10-14 18:01:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:28,776 INFO L93 Difference]: Finished difference Result 222 states and 234 transitions. [2020-10-14 18:01:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:01:28,778 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-10-14 18:01:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:28,779 INFO L225 Difference]: With dead ends: 222 [2020-10-14 18:01:28,780 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 18:01:28,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:01:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 18:01:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-14 18:01:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 18:01:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-10-14 18:01:28,816 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 121 [2020-10-14 18:01:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:28,816 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-10-14 18:01:28,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:01:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-10-14 18:01:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 18:01:28,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:28,818 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:28,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:01:28,818 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:28,819 INFO L82 PathProgramCache]: Analyzing trace with hash 348752660, now seen corresponding path program 21 times [2020-10-14 18:01:28,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:28,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133958624] [2020-10-14 18:01:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:28,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:29,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:29,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:33,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:33,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 18:01:33,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:33,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:01:33,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:33,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:01:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:01:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:01:33,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:34,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:34,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:34,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:34,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:34,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:34,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:34,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:34,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:34,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:34,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:34,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:34,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-10-14 18:01:34,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133958624] [2020-10-14 18:01:34,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:34,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:01:34,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383203513] [2020-10-14 18:01:34,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:01:34,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:34,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:01:34,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:01:34,265 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 25 states. [2020-10-14 18:01:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:34,646 INFO L93 Difference]: Finished difference Result 231 states and 243 transitions. [2020-10-14 18:01:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:01:34,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2020-10-14 18:01:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:34,647 INFO L225 Difference]: With dead ends: 231 [2020-10-14 18:01:34,648 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 18:01:34,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:01:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 18:01:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-14 18:01:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 18:01:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-10-14 18:01:34,679 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 126 [2020-10-14 18:01:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:34,679 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-10-14 18:01:34,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:01:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-10-14 18:01:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 18:01:34,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:34,681 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:34,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:01:34,682 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:34,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:34,682 INFO L82 PathProgramCache]: Analyzing trace with hash 577530882, now seen corresponding path program 22 times [2020-10-14 18:01:34,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:34,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231696698] [2020-10-14 18:01:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:34,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:34,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:34,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:35,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:39,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:39,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-14 18:01:39,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:39,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:01:39,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:39,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:01:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 18:01:39,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:01:39,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:40,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:40,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:40,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:40,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:40,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:40,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:40,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:40,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:40,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:40,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:40,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:40,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-10-14 18:01:40,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231696698] [2020-10-14 18:01:40,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:40,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:01:40,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351203702] [2020-10-14 18:01:40,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:01:40,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:40,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:01:40,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:01:40,084 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 26 states. [2020-10-14 18:01:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:40,406 INFO L93 Difference]: Finished difference Result 240 states and 252 transitions. [2020-10-14 18:01:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:01:40,406 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2020-10-14 18:01:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:40,408 INFO L225 Difference]: With dead ends: 240 [2020-10-14 18:01:40,408 INFO L226 Difference]: Without dead ends: 137 [2020-10-14 18:01:40,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:01:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-14 18:01:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-14 18:01:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 18:01:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2020-10-14 18:01:40,437 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 131 [2020-10-14 18:01:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:40,438 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2020-10-14 18:01:40,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:01:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2020-10-14 18:01:40,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 18:01:40,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:40,439 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:40,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:01:40,440 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:40,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:40,440 INFO L82 PathProgramCache]: Analyzing trace with hash 33785428, now seen corresponding path program 23 times [2020-10-14 18:01:40,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:40,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556407711] [2020-10-14 18:01:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:40,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:40,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:40,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:41,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:45,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:45,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 18:01:45,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:45,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:01:45,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:45,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:45,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:01:45,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-14 18:01:45,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:01:45,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:45,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:45,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:45,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:45,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:45,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:45,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:45,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:45,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:45,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:45,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:45,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:45,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-10-14 18:01:45,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556407711] [2020-10-14 18:01:45,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:45,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:01:45,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886354309] [2020-10-14 18:01:45,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:01:45,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:45,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:01:45,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:01:45,855 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand 27 states. [2020-10-14 18:01:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:46,278 INFO L93 Difference]: Finished difference Result 249 states and 261 transitions. [2020-10-14 18:01:46,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:01:46,279 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2020-10-14 18:01:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:46,281 INFO L225 Difference]: With dead ends: 249 [2020-10-14 18:01:46,281 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 18:01:46,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:01:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 18:01:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-14 18:01:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 18:01:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-14 18:01:46,325 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 136 [2020-10-14 18:01:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:46,326 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-14 18:01:46,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:01:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-14 18:01:46,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-14 18:01:46,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:46,328 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:46,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:01:46,329 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:46,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2020772030, now seen corresponding path program 24 times [2020-10-14 18:01:46,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:46,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696724698] [2020-10-14 18:01:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:46,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:46,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:47,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:51,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:51,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-14 18:01:51,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:51,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 18:01:51,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:51,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:51,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:01:51,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:01:51,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:01:51,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:51,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:51,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:51,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:51,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:51,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:51,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:51,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:51,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:51,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:51,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:51,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-14 18:01:51,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696724698] [2020-10-14 18:01:51,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:51,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:01:51,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494339164] [2020-10-14 18:01:51,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:01:51,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:01:51,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:01:51,804 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 28 states. [2020-10-14 18:01:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:52,137 INFO L93 Difference]: Finished difference Result 258 states and 270 transitions. [2020-10-14 18:01:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:01:52,138 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 141 [2020-10-14 18:01:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:52,139 INFO L225 Difference]: With dead ends: 258 [2020-10-14 18:01:52,140 INFO L226 Difference]: Without dead ends: 147 [2020-10-14 18:01:52,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:01:52,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-14 18:01:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-14 18:01:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 18:01:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2020-10-14 18:01:52,165 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 141 [2020-10-14 18:01:52,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:52,165 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2020-10-14 18:01:52,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:01:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2020-10-14 18:01:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 18:01:52,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:52,167 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:52,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:01:52,167 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:52,167 INFO L82 PathProgramCache]: Analyzing trace with hash -693997164, now seen corresponding path program 25 times [2020-10-14 18:01:52,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:52,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278315805] [2020-10-14 18:01:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:52,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:52,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:52,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:53,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:57,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:57,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 18:01:57,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:01:57,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 18:01:57,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:57,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:57,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:01:57,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-14 18:01:57,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:01:57,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:01:57,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:01:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:57,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:57,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:01:57,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:01:57,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:01:57,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:01:57,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:01:57,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:01:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:01:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:01:57,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:01:57,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:01:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-10-14 18:01:57,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278315805] [2020-10-14 18:01:57,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:01:57,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:01:57,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079794755] [2020-10-14 18:01:57,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:01:57,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:01:57,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:01:57,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:01:57,742 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 29 states. [2020-10-14 18:01:58,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:01:58,140 INFO L93 Difference]: Finished difference Result 267 states and 279 transitions. [2020-10-14 18:01:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:01:58,141 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 146 [2020-10-14 18:01:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:01:58,143 INFO L225 Difference]: With dead ends: 267 [2020-10-14 18:01:58,143 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 18:01:58,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:01:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 18:01:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-14 18:01:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-14 18:01:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-10-14 18:01:58,175 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 146 [2020-10-14 18:01:58,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:01:58,175 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-10-14 18:01:58,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:01:58,175 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-10-14 18:01:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-14 18:01:58,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:01:58,176 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:01:58,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:01:58,177 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:01:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:01:58,177 INFO L82 PathProgramCache]: Analyzing trace with hash 33477250, now seen corresponding path program 26 times [2020-10-14 18:01:58,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:01:58,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515141269] [2020-10-14 18:01:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:01:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:01:58,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:58,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:01:59,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:03,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:03,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-14 18:02:03,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:03,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:02:03,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:03,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:02:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 18:02:03,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:02:03,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:03,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:03,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:03,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:03,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:03,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:03,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:03,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:03,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:03,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-14 18:02:03,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515141269] [2020-10-14 18:02:03,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:03,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:02:03,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977536377] [2020-10-14 18:02:03,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:02:03,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:03,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:02:03,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:02:03,684 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 30 states. [2020-10-14 18:02:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:04,045 INFO L93 Difference]: Finished difference Result 276 states and 288 transitions. [2020-10-14 18:02:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:02:04,045 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2020-10-14 18:02:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:04,047 INFO L225 Difference]: With dead ends: 276 [2020-10-14 18:02:04,047 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 18:02:04,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:02:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 18:02:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-14 18:02:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 18:02:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2020-10-14 18:02:04,072 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 151 [2020-10-14 18:02:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:04,073 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2020-10-14 18:02:04,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:02:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2020-10-14 18:02:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-14 18:02:04,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:04,073 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:04,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:02:04,074 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:04,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1320792876, now seen corresponding path program 27 times [2020-10-14 18:02:04,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:04,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986666241] [2020-10-14 18:02:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:04,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:04,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:04,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:05,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:09,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:09,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-14 18:02:09,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:09,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:02:09,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:09,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:02:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:02:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:02:09,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:09,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:09,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:09,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:09,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:09,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:09,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:09,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:09,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:09,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:09,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:09,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:09,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-10-14 18:02:09,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986666241] [2020-10-14 18:02:09,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:09,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:02:09,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901239627] [2020-10-14 18:02:09,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:02:09,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:09,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:02:09,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:02:09,612 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 31 states. [2020-10-14 18:02:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:10,030 INFO L93 Difference]: Finished difference Result 285 states and 297 transitions. [2020-10-14 18:02:10,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:02:10,031 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2020-10-14 18:02:10,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:10,032 INFO L225 Difference]: With dead ends: 285 [2020-10-14 18:02:10,032 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 18:02:10,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:02:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 18:02:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-14 18:02:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-14 18:02:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-10-14 18:02:10,069 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 156 [2020-10-14 18:02:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:10,069 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-10-14 18:02:10,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 18:02:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-10-14 18:02:10,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-14 18:02:10,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:10,071 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:10,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:02:10,071 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:10,072 INFO L82 PathProgramCache]: Analyzing trace with hash 25198018, now seen corresponding path program 28 times [2020-10-14 18:02:10,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:10,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132580405] [2020-10-14 18:02:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:10,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:10,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:10,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:11,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:15,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:15,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-14 18:02:15,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:15,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:02:15,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:15,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:15,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:02:15,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 18:02:15,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:02:15,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:15,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:15,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:15,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:15,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:15,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:15,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:15,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:15,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:15,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-10-14 18:02:15,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132580405] [2020-10-14 18:02:15,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:15,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:02:15,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169830450] [2020-10-14 18:02:15,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:02:15,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:15,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:02:15,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:02:15,666 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 32 states. [2020-10-14 18:02:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:16,097 INFO L93 Difference]: Finished difference Result 294 states and 306 transitions. [2020-10-14 18:02:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:02:16,098 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2020-10-14 18:02:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:16,099 INFO L225 Difference]: With dead ends: 294 [2020-10-14 18:02:16,099 INFO L226 Difference]: Without dead ends: 167 [2020-10-14 18:02:16,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:02:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-14 18:02:16,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-14 18:02:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 18:02:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 171 transitions. [2020-10-14 18:02:16,126 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 171 transitions. Word has length 161 [2020-10-14 18:02:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:16,126 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 171 transitions. [2020-10-14 18:02:16,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:02:16,126 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 171 transitions. [2020-10-14 18:02:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-14 18:02:16,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:16,127 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:16,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:02:16,128 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:16,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:16,128 INFO L82 PathProgramCache]: Analyzing trace with hash 160372756, now seen corresponding path program 29 times [2020-10-14 18:02:16,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:16,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016674157] [2020-10-14 18:02:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:16,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:16,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:16,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:16,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:21,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:21,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-14 18:02:21,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:21,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 18:02:21,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:21,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:02:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:02:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:02:21,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:21,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:21,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:21,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:21,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:21,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:21,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:21,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:21,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:21,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:21,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:21,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-10-14 18:02:21,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016674157] [2020-10-14 18:02:21,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:21,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:02:21,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088664429] [2020-10-14 18:02:21,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:02:21,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:21,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:02:21,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:02:21,736 INFO L87 Difference]: Start difference. First operand 167 states and 171 transitions. Second operand 33 states. [2020-10-14 18:02:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:22,171 INFO L93 Difference]: Finished difference Result 303 states and 315 transitions. [2020-10-14 18:02:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 18:02:22,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 166 [2020-10-14 18:02:22,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:22,173 INFO L225 Difference]: With dead ends: 303 [2020-10-14 18:02:22,174 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 18:02:22,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:02:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 18:02:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-14 18:02:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 18:02:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2020-10-14 18:02:22,202 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 166 [2020-10-14 18:02:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:22,202 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2020-10-14 18:02:22,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:02:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2020-10-14 18:02:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-14 18:02:22,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:22,203 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:22,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:02:22,203 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:22,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1395492606, now seen corresponding path program 30 times [2020-10-14 18:02:22,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:22,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249495229] [2020-10-14 18:02:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:22,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:22,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:22,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:23,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:27,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:27,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-14 18:02:27,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:27,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 18:02:27,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:27,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:27,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:02:27,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 18:02:27,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:02:27,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:27,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:27,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:27,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:27,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:27,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:27,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:27,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:27,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:27,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:27,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:27,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:27,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-10-14 18:02:27,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249495229] [2020-10-14 18:02:27,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:27,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 18:02:27,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605391893] [2020-10-14 18:02:27,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 18:02:27,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:27,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 18:02:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:02:27,876 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 34 states. [2020-10-14 18:02:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:28,306 INFO L93 Difference]: Finished difference Result 312 states and 324 transitions. [2020-10-14 18:02:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:02:28,307 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 171 [2020-10-14 18:02:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:28,308 INFO L225 Difference]: With dead ends: 312 [2020-10-14 18:02:28,308 INFO L226 Difference]: Without dead ends: 177 [2020-10-14 18:02:28,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:02:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-14 18:02:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-10-14 18:02:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 18:02:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2020-10-14 18:02:28,345 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 171 [2020-10-14 18:02:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:28,345 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2020-10-14 18:02:28,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 18:02:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2020-10-14 18:02:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-14 18:02:28,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:28,346 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:28,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:02:28,347 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:28,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1340288172, now seen corresponding path program 31 times [2020-10-14 18:02:28,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:28,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784175798] [2020-10-14 18:02:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:28,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:28,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:29,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:33,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:33,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-14 18:02:33,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:33,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 18:02:33,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:33,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:02:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-14 18:02:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:02:33,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:34,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:34,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:34,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:34,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:34,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:34,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:34,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:34,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:34,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-10-14 18:02:34,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784175798] [2020-10-14 18:02:34,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:34,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 18:02:34,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521110558] [2020-10-14 18:02:34,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 18:02:34,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:34,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 18:02:34,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:02:34,056 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 35 states. [2020-10-14 18:02:34,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:34,564 INFO L93 Difference]: Finished difference Result 321 states and 333 transitions. [2020-10-14 18:02:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:02:34,564 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 176 [2020-10-14 18:02:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:34,566 INFO L225 Difference]: With dead ends: 321 [2020-10-14 18:02:34,566 INFO L226 Difference]: Without dead ends: 182 [2020-10-14 18:02:34,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:02:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-14 18:02:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-14 18:02:34,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-14 18:02:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-10-14 18:02:34,595 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 176 [2020-10-14 18:02:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:34,596 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-10-14 18:02:34,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 18:02:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-10-14 18:02:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-14 18:02:34,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:34,597 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:34,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:02:34,597 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash -508246974, now seen corresponding path program 32 times [2020-10-14 18:02:34,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:34,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608034282] [2020-10-14 18:02:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:34,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:34,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:36,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:39,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:39,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-14 18:02:39,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:39,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 18:02:39,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:39,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:02:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:02:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:02:39,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:40,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:40,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:40,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:40,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:40,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:40,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:40,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:40,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-10-14 18:02:40,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608034282] [2020-10-14 18:02:40,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:40,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:02:40,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543275530] [2020-10-14 18:02:40,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:02:40,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:40,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:02:40,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:02:40,284 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 36 states. [2020-10-14 18:02:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:40,785 INFO L93 Difference]: Finished difference Result 330 states and 342 transitions. [2020-10-14 18:02:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:02:40,786 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 181 [2020-10-14 18:02:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:40,787 INFO L225 Difference]: With dead ends: 330 [2020-10-14 18:02:40,788 INFO L226 Difference]: Without dead ends: 187 [2020-10-14 18:02:40,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:02:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-14 18:02:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-14 18:02:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-14 18:02:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2020-10-14 18:02:40,814 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 181 [2020-10-14 18:02:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:40,815 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2020-10-14 18:02:40,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:02:40,815 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2020-10-14 18:02:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-14 18:02:40,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:40,816 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:40,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:02:40,816 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:40,816 INFO L82 PathProgramCache]: Analyzing trace with hash -829456748, now seen corresponding path program 33 times [2020-10-14 18:02:40,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:40,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580954324] [2020-10-14 18:02:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:40,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:40,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:41,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:45,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:45,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-14 18:02:45,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:45,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:02:45,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:45,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:45,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:02:45,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-14 18:02:45,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:02:45,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:46,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:46,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:46,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:46,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:46,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:46,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:46,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:46,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:46,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:46,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-10-14 18:02:46,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580954324] [2020-10-14 18:02:46,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:46,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 18:02:46,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701099138] [2020-10-14 18:02:46,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 18:02:46,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:46,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 18:02:46,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:02:46,566 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand 37 states. [2020-10-14 18:02:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:47,091 INFO L93 Difference]: Finished difference Result 339 states and 351 transitions. [2020-10-14 18:02:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 18:02:47,091 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 186 [2020-10-14 18:02:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:47,093 INFO L225 Difference]: With dead ends: 339 [2020-10-14 18:02:47,093 INFO L226 Difference]: Without dead ends: 192 [2020-10-14 18:02:47,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:02:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-14 18:02:47,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-14 18:02:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-14 18:02:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2020-10-14 18:02:47,124 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 186 [2020-10-14 18:02:47,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:47,125 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2020-10-14 18:02:47,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 18:02:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2020-10-14 18:02:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-14 18:02:47,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:47,126 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:47,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:02:47,126 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:47,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:47,126 INFO L82 PathProgramCache]: Analyzing trace with hash 887578498, now seen corresponding path program 34 times [2020-10-14 18:02:47,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:47,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546998276] [2020-10-14 18:02:47,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:47,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:47,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:48,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:52,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:52,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-14 18:02:52,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:52,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 18:02:52,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:52,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:02:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 18:02:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:02:52,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:52,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:52,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:52,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:52,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:52,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:52,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:52,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:52,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:52,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:52,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-10-14 18:02:52,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546998276] [2020-10-14 18:02:52,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:52,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 18:02:52,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336922685] [2020-10-14 18:02:52,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 18:02:52,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:52,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 18:02:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:02:52,903 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 38 states. [2020-10-14 18:02:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:53,391 INFO L93 Difference]: Finished difference Result 348 states and 360 transitions. [2020-10-14 18:02:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:02:53,392 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 191 [2020-10-14 18:02:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:53,393 INFO L225 Difference]: With dead ends: 348 [2020-10-14 18:02:53,393 INFO L226 Difference]: Without dead ends: 197 [2020-10-14 18:02:53,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:02:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-14 18:02:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2020-10-14 18:02:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-14 18:02:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 201 transitions. [2020-10-14 18:02:53,430 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 201 transitions. Word has length 191 [2020-10-14 18:02:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:53,430 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 201 transitions. [2020-10-14 18:02:53,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 18:02:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 201 transitions. [2020-10-14 18:02:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-14 18:02:53,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:53,431 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:53,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:02:53,432 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:53,432 INFO L82 PathProgramCache]: Analyzing trace with hash -410576428, now seen corresponding path program 35 times [2020-10-14 18:02:53,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:53,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364465438] [2020-10-14 18:02:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:53,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:53,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:55,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:58,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:58,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-14 18:02:58,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:02:58,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-14 18:02:58,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:58,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:02:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:02:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:02:58,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:59,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:02:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:59,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:59,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:02:59,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:02:59,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:02:59,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:02:59,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:02:59,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:02:59,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:02:59,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:02:59,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:02:59,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:02:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-10-14 18:02:59,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364465438] [2020-10-14 18:02:59,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:02:59,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:02:59,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181361496] [2020-10-14 18:02:59,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:02:59,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:02:59,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:02:59,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:02:59,248 INFO L87 Difference]: Start difference. First operand 197 states and 201 transitions. Second operand 39 states. [2020-10-14 18:02:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:02:59,691 INFO L93 Difference]: Finished difference Result 357 states and 369 transitions. [2020-10-14 18:02:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:02:59,692 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 196 [2020-10-14 18:02:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:02:59,693 INFO L225 Difference]: With dead ends: 357 [2020-10-14 18:02:59,693 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 18:02:59,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:02:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 18:02:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-10-14 18:02:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-14 18:02:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2020-10-14 18:02:59,729 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 196 [2020-10-14 18:02:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:02:59,730 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2020-10-14 18:02:59,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:02:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2020-10-14 18:02:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-14 18:02:59,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:02:59,731 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:02:59,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:02:59,731 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:02:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:02:59,731 INFO L82 PathProgramCache]: Analyzing trace with hash -232109374, now seen corresponding path program 36 times [2020-10-14 18:02:59,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:02:59,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118759610] [2020-10-14 18:02:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:02:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:02:59,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:02:59,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:00,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:01,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:04,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:04,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-14 18:03:04,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:03:04,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-14 18:03:04,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:04,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:04,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:03:04,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:04,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:03:04,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:05,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:05,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:05,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:05,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:05,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:05,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:05,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:05,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:05,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:05,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:05,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:05,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-10-14 18:03:05,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118759610] [2020-10-14 18:03:05,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:05,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:03:05,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145023077] [2020-10-14 18:03:05,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:03:05,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:03:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:03:05,644 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand 40 states. [2020-10-14 18:03:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:06,187 INFO L93 Difference]: Finished difference Result 366 states and 378 transitions. [2020-10-14 18:03:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 18:03:06,188 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 201 [2020-10-14 18:03:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:06,189 INFO L225 Difference]: With dead ends: 366 [2020-10-14 18:03:06,190 INFO L226 Difference]: Without dead ends: 207 [2020-10-14 18:03:06,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:03:06,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-14 18:03:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-10-14 18:03:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-14 18:03:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2020-10-14 18:03:06,229 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 201 [2020-10-14 18:03:06,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:06,229 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2020-10-14 18:03:06,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:03:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2020-10-14 18:03:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-14 18:03:06,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:06,230 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:06,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:03:06,231 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:06,231 INFO L82 PathProgramCache]: Analyzing trace with hash -693918444, now seen corresponding path program 37 times [2020-10-14 18:03:06,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:06,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248827698] [2020-10-14 18:03:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:06,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:06,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:06,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:08,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:11,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:11,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-14 18:03:11,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:03:11,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 18:03:11,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:11,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:11,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:03:11,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-14 18:03:11,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:03:11,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:12,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:12,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:12,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:12,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:12,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:12,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:12,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:12,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:12,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:12,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:12,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:12,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-10-14 18:03:12,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248827698] [2020-10-14 18:03:12,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:12,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:03:12,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84941486] [2020-10-14 18:03:12,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:03:12,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:12,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:03:12,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:03:12,192 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand 41 states. [2020-10-14 18:03:12,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:12,742 INFO L93 Difference]: Finished difference Result 375 states and 387 transitions. [2020-10-14 18:03:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:03:12,743 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 206 [2020-10-14 18:03:12,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:12,744 INFO L225 Difference]: With dead ends: 375 [2020-10-14 18:03:12,744 INFO L226 Difference]: Without dead ends: 212 [2020-10-14 18:03:12,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:03:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-14 18:03:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2020-10-14 18:03:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-14 18:03:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2020-10-14 18:03:12,773 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 206 [2020-10-14 18:03:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:12,774 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2020-10-14 18:03:12,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:03:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2020-10-14 18:03:12,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-14 18:03:12,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:12,775 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:12,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:03:12,775 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash 473794050, now seen corresponding path program 38 times [2020-10-14 18:03:12,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:12,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908912623] [2020-10-14 18:03:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:12,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:12,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:13,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:15,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:17,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:17,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-14 18:03:17,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:03:17,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 18:03:17,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:17,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:17,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:03:17,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-14 18:03:17,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:03:17,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:18,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:18,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:18,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:18,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:18,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:18,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:18,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:18,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:18,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:18,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:18,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:18,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-10-14 18:03:18,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908912623] [2020-10-14 18:03:18,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:18,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 18:03:18,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212615777] [2020-10-14 18:03:18,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 18:03:18,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:18,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 18:03:18,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:03:18,760 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand 42 states. [2020-10-14 18:03:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:19,327 INFO L93 Difference]: Finished difference Result 384 states and 396 transitions. [2020-10-14 18:03:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 18:03:19,328 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 211 [2020-10-14 18:03:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:19,329 INFO L225 Difference]: With dead ends: 384 [2020-10-14 18:03:19,329 INFO L226 Difference]: Without dead ends: 217 [2020-10-14 18:03:19,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:03:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-14 18:03:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2020-10-14 18:03:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-14 18:03:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2020-10-14 18:03:19,363 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 211 [2020-10-14 18:03:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:19,363 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2020-10-14 18:03:19,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 18:03:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2020-10-14 18:03:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-14 18:03:19,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:19,365 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:19,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:03:19,365 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:19,366 INFO L82 PathProgramCache]: Analyzing trace with hash -796581804, now seen corresponding path program 39 times [2020-10-14 18:03:19,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:19,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638480859] [2020-10-14 18:03:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:19,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:19,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:20,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:22,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking...