/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:42:22,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:42:22,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:42:22,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:42:22,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:42:22,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:42:22,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:42:22,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:42:22,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:42:22,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:42:22,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:42:22,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:42:22,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:42:22,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:42:22,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:42:22,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:42:22,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:42:22,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:42:22,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:42:22,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:42:22,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:42:22,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:42:22,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:42:22,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:42:22,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:42:22,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:42:22,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:42:22,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:42:22,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:42:22,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:42:22,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:42:22,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:42:22,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:42:22,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:42:22,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:42:22,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:42:22,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:42:22,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:42:22,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:42:22,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:42:22,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:42:22,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:42:22,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:42:22,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:42:22,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:42:22,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:42:22,922 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:42:22,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:42:22,922 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:42:22,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:42:22,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:42:22,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:42:22,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:42:22,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:42:22,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:42:22,923 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:42:22,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:42:22,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:42:22,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:42:22,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:42:22,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:42:22,925 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:42:22,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:42:22,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:42:22,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:42:22,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:42:22,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:42:22,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:42:22,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:42:22,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:42:22,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:42:22,927 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:42:23,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:42:23,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:42:23,216 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:42:23,217 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:42:23,218 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:42:23,219 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2020-10-13 23:42:23,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/371f84936/00e7706f9a4046f89a40800406c894e9/FLAG540870111 [2020-10-13 23:42:23,716 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:42:23,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2020-10-13 23:42:23,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/371f84936/00e7706f9a4046f89a40800406c894e9/FLAG540870111 [2020-10-13 23:42:24,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/371f84936/00e7706f9a4046f89a40800406c894e9 [2020-10-13 23:42:24,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:42:24,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:42:24,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:24,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:42:24,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:42:24,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:24" (1/1) ... [2020-10-13 23:42:24,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54001c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24, skipping insertion in model container [2020-10-13 23:42:24,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:24" (1/1) ... [2020-10-13 23:42:24,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:42:24,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:42:24,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:24,346 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:42:24,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:24,391 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:42:24,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24 WrapperNode [2020-10-13 23:42:24,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:24,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:42:24,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:42:24,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:42:24,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24" (1/1) ... [2020-10-13 23:42:24,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24" (1/1) ... [2020-10-13 23:42:24,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24" (1/1) ... [2020-10-13 23:42:24,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24" (1/1) ... [2020-10-13 23:42:24,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24" (1/1) ... [2020-10-13 23:42:24,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24" (1/1) ... [2020-10-13 23:42:24,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24" (1/1) ... [2020-10-13 23:42:24,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:42:24,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:42:24,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:42:24,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:42:24,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:42:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:42:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:42:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:42:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:42:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:42:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:42:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:42:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:42:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:42:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:42:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:42:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:42:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:42:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:42:24,866 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:42:24,867 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:42:24,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:24 BoogieIcfgContainer [2020-10-13 23:42:24,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:42:24,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:42:24,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:42:24,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:42:24,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:42:24" (1/3) ... [2020-10-13 23:42:24,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176d07ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:24, skipping insertion in model container [2020-10-13 23:42:24,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:24" (2/3) ... [2020-10-13 23:42:24,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176d07ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:24, skipping insertion in model container [2020-10-13 23:42:24,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:24" (3/3) ... [2020-10-13 23:42:24,879 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2020-10-13 23:42:24,890 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:42:24,898 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:42:24,915 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:42:24,941 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:42:24,941 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:42:24,941 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:42:24,941 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:42:24,942 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:42:24,942 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:42:24,942 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:42:24,942 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:42:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-13 23:42:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:42:24,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:24,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:24,985 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:24,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:24,990 INFO L82 PathProgramCache]: Analyzing trace with hash -825680561, now seen corresponding path program 1 times [2020-10-13 23:42:24,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:24,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716794690] [2020-10-13 23:42:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:25,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:25,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:25,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:25,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:25,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:42:25,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:25,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-13 23:42:25,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:25,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:25,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:25,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:42:25,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:25,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:42:25,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:25,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:25,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:25,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:25,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:25,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:42:25,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:25,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:25,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:25,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:25,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:25,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:42:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:42:25,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716794690] [2020-10-13 23:42:25,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:25,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:42:25,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614837050] [2020-10-13 23:42:25,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:42:25,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:25,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:42:25,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:42:25,679 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-13 23:42:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:25,846 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2020-10-13 23:42:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:42:25,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 23:42:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:25,867 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:42:25,868 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:42:25,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:42:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:42:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 23:42:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 23:42:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-13 23:42:25,936 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 15 [2020-10-13 23:42:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:25,936 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-13 23:42:25,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:42:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-13 23:42:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:42:25,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:25,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:25,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:42:25,941 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:25,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1876449348, now seen corresponding path program 1 times [2020-10-13 23:42:25,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:25,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723402485] [2020-10-13 23:42:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:25,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:26,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:42:26,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:26,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-13 23:42:26,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:26,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:26,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:42:26,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 23:42:26,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:42:26,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:26,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:26,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:26,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:26,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:26,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:26,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:26,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:26,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:26,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:26,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:26,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:42:26,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723402485] [2020-10-13 23:42:26,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:26,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:42:26,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97832091] [2020-10-13 23:42:26,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:42:26,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:26,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:42:26,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:26,336 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-10-13 23:42:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:26,428 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-13 23:42:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:42:26,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 23:42:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:26,430 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:42:26,430 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 23:42:26,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 23:42:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-13 23:42:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:42:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-13 23:42:26,440 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2020-10-13 23:42:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:26,441 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-13 23:42:26,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:42:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-13 23:42:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:42:26,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:26,442 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] [2020-10-13 23:42:26,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:42:26,443 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:26,443 INFO L82 PathProgramCache]: Analyzing trace with hash -684235798, now seen corresponding path program 1 times [2020-10-13 23:42:26,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:26,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995306002] [2020-10-13 23:42:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:26,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:27,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:27,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:42:27,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:27,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1353 [2020-10-13 23:42:27,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:27,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:27,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:42:27,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:27,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:42:27,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:27,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:27,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:27,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:27,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:27,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:27,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:27,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:27,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:27,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:27,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:27,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:27,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:42:27,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995306002] [2020-10-13 23:42:27,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:27,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:42:27,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44373819] [2020-10-13 23:42:27,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:42:27,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:27,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:42:27,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:27,858 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2020-10-13 23:42:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:27,961 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-10-13 23:42:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:42:27,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-13 23:42:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:27,963 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:42:27,963 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 23:42:27,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 23:42:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-10-13 23:42:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:42:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-13 23:42:27,972 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 21 [2020-10-13 23:42:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:27,972 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-13 23:42:27,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:42:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-13 23:42:27,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:42:27,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:27,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:27,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:42:27,975 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1590841348, now seen corresponding path program 2 times [2020-10-13 23:42:27,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:27,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488847125] [2020-10-13 23:42:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:27,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:28,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:28,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:28,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:29,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:31,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:31,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:42:31,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:42:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3091 [2020-10-13 23:42:31,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:31,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:42:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:31,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:42:31,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:42:31,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:31,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:31,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:31,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:31,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:31,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:31,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:31,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:31,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:31,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:31,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:31,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:42:31,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488847125] [2020-10-13 23:42:31,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:31,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:42:31,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097959875] [2020-10-13 23:42:31,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:42:31,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:31,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:42:31,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:31,165 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 6 states. [2020-10-13 23:42:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:31,352 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-10-13 23:42:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:42:31,353 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 23:42:31,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:31,354 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:42:31,355 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 23:42:31,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 23:42:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-10-13 23:42:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:42:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-13 23:42:31,379 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2020-10-13 23:42:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:31,382 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-13 23:42:31,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:42:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-13 23:42:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:42:31,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:31,383 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:31,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:42:31,384 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1802172202, now seen corresponding path program 3 times [2020-10-13 23:42:31,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:31,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847203537] [2020-10-13 23:42:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:31,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:31,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:31,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:32,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:32,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:33,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:36,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 23:42:36,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:36,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:42:36,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:36,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:42:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:42:36,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:36,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:36,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:36,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:36,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:36,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:36,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:36,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:36,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:42:36,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847203537] [2020-10-13 23:42:36,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:36,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:42:36,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683439151] [2020-10-13 23:42:36,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:42:36,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:36,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:42:36,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:36,471 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 7 states. [2020-10-13 23:42:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:36,602 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-10-13 23:42:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:42:36,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-13 23:42:36,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:36,604 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:42:36,604 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 23:42:36,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:36,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 23:42:36,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-13 23:42:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 23:42:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-13 23:42:36,612 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 33 [2020-10-13 23:42:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:36,612 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-13 23:42:36,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:42:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-13 23:42:36,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:42:36,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:36,614 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:36,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:42:36,615 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:36,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:36,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1613342780, now seen corresponding path program 4 times [2020-10-13 23:42:36,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:36,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836757563] [2020-10-13 23:42:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:36,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:37,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:37,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:40,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:41,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:42:41,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:42:41,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:42:41,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:41,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:42:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:42:41,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:41,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:41,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:41,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:41,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:41,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:41,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:41,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:41,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:41,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:42:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 23:42:41,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836757563] [2020-10-13 23:42:41,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:41,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:42:41,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640408335] [2020-10-13 23:42:41,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:42:41,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:41,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:42:41,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:42:41,716 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 8 states. [2020-10-13 23:42:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:41,886 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2020-10-13 23:42:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:42:41,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 23:42:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:41,888 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:42:41,888 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:42:41,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:42:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:42:41,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-13 23:42:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:42:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-10-13 23:42:41,904 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 39 [2020-10-13 23:42:41,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:41,905 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-10-13 23:42:41,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:42:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2020-10-13 23:42:41,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:42:41,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:41,907 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:41,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:42:41,907 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:41,907 INFO L82 PathProgramCache]: Analyzing trace with hash 306051690, now seen corresponding path program 5 times [2020-10-13 23:42:41,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:41,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734944396] [2020-10-13 23:42:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:41,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:43,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:43,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:46,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:46,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:46,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 23:42:46,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:46,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:42:46,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:46,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:46,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:42:46,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:42:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:42:46,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:47,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:47,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:47,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:47,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:47,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:47,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:47,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:47,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:47,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:47,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 23:42:47,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734944396] [2020-10-13 23:42:47,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:47,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:42:47,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372821808] [2020-10-13 23:42:47,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:42:47,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:47,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:42:47,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:42:47,064 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 9 states. [2020-10-13 23:42:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:47,229 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2020-10-13 23:42:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:42:47,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-13 23:42:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:47,231 INFO L225 Difference]: With dead ends: 98 [2020-10-13 23:42:47,231 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 23:42:47,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:42:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 23:42:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2020-10-13 23:42:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:42:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-10-13 23:42:47,247 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 45 [2020-10-13 23:42:47,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:47,250 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-10-13 23:42:47,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:42:47,250 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-10-13 23:42:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:42:47,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:47,253 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:47,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:42:47,254 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:47,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash 835219332, now seen corresponding path program 6 times [2020-10-13 23:42:47,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:47,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021473526] [2020-10-13 23:42:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:47,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:48,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:48,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:52,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:52,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:52,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:42:52,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:42:52,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:42:52,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:52,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:42:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:52,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:42:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:52,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:52,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:52,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:52,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:52,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:52,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:52,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:52,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:52,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 23:42:52,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021473526] [2020-10-13 23:42:52,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:52,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:42:52,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133329880] [2020-10-13 23:42:52,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:42:52,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:52,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:42:52,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:42:52,366 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 10 states. [2020-10-13 23:42:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:52,558 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2020-10-13 23:42:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:42:52,559 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-13 23:42:52,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:52,560 INFO L225 Difference]: With dead ends: 107 [2020-10-13 23:42:52,560 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:42:52,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:42:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:42:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-13 23:42:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:42:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-10-13 23:42:52,567 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 51 [2020-10-13 23:42:52,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:52,568 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-10-13 23:42:52,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:42:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-10-13 23:42:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:42:52,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:52,569 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:52,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:42:52,570 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:52,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:52,570 INFO L82 PathProgramCache]: Analyzing trace with hash -653496918, now seen corresponding path program 7 times [2020-10-13 23:42:52,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:52,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520527563] [2020-10-13 23:42:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:52,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:52,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:56,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:57,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:42:57,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:42:57,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:42:57,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:57,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:42:57,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:42:57,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:57,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:57,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:57,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:57,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:57,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:42:57,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:57,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:57,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 23:42:57,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520527563] [2020-10-13 23:42:57,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:57,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:42:57,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363191443] [2020-10-13 23:42:57,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:42:57,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:57,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:42:57,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:42:57,732 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 11 states. [2020-10-13 23:42:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:57,891 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2020-10-13 23:42:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:42:57,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-13 23:42:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:57,893 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:42:57,893 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:42:57,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:42:57,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:42:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-13 23:42:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:42:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-13 23:42:57,902 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 57 [2020-10-13 23:42:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:57,903 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-13 23:42:57,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:42:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-13 23:42:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:42:57,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:57,904 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:57,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:42:57,905 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash -796092604, now seen corresponding path program 8 times [2020-10-13 23:42:57,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:57,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347795125] [2020-10-13 23:42:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:57,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:02,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:02,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:43:02,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:43:02,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:43:02,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:02,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:02,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:43:02,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:43:02,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:43:02,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:03,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:03,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:03,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:03,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:03,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:03,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:03,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:03,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:03,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:03,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 23:43:03,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347795125] [2020-10-13 23:43:03,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:03,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:43:03,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007858952] [2020-10-13 23:43:03,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:43:03,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:03,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:43:03,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:03,063 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 12 states. [2020-10-13 23:43:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:03,290 INFO L93 Difference]: Finished difference Result 125 states and 162 transitions. [2020-10-13 23:43:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:43:03,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-13 23:43:03,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:03,292 INFO L225 Difference]: With dead ends: 125 [2020-10-13 23:43:03,292 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:43:03,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:43:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-10-13 23:43:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:43:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2020-10-13 23:43:03,313 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 63 [2020-10-13 23:43:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:03,313 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2020-10-13 23:43:03,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:43:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2020-10-13 23:43:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 23:43:03,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:03,315 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:03,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:43:03,315 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:03,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:03,316 INFO L82 PathProgramCache]: Analyzing trace with hash -802008854, now seen corresponding path program 9 times [2020-10-13 23:43:03,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:03,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364514787] [2020-10-13 23:43:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:03,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:03,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:05,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:08,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:43:08,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:43:08,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:43:08,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:08,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:08,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:43:08,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:08,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:43:08,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:08,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:08,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:08,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:08,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:08,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:08,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:08,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:08,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:08,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:08,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:08,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 23:43:08,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364514787] [2020-10-13 23:43:08,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:08,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:43:08,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356045564] [2020-10-13 23:43:08,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:43:08,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:08,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:43:08,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:43:08,485 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 13 states. [2020-10-13 23:43:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:08,732 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2020-10-13 23:43:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:43:08,733 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-10-13 23:43:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:08,734 INFO L225 Difference]: With dead ends: 134 [2020-10-13 23:43:08,734 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 23:43:08,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:43:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 23:43:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-10-13 23:43:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 23:43:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2020-10-13 23:43:08,744 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 69 [2020-10-13 23:43:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:08,745 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2020-10-13 23:43:08,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:43:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2020-10-13 23:43:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:43:08,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:08,746 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:08,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:43:08,747 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:08,747 INFO L82 PathProgramCache]: Analyzing trace with hash 889638660, now seen corresponding path program 10 times [2020-10-13 23:43:08,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:08,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280658318] [2020-10-13 23:43:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:08,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:12,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:13,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:43:13,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:43:13,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:43:13,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:13,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:13,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:43:13,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:13,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:43:13,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:13,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:13,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:13,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:13,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:13,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:13,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:13,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:13,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:13,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:13,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:13,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 23:43:13,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280658318] [2020-10-13 23:43:13,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:13,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:43:13,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513690227] [2020-10-13 23:43:13,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:43:13,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:13,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:43:13,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:13,944 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand 14 states. [2020-10-13 23:43:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:14,199 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2020-10-13 23:43:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:43:14,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-10-13 23:43:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:14,202 INFO L225 Difference]: With dead ends: 143 [2020-10-13 23:43:14,202 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 23:43:14,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 23:43:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2020-10-13 23:43:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 23:43:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2020-10-13 23:43:14,209 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 75 [2020-10-13 23:43:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:14,210 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2020-10-13 23:43:14,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:43:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2020-10-13 23:43:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:43:14,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:14,211 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:14,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:43:14,212 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash -888429526, now seen corresponding path program 11 times [2020-10-13 23:43:14,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:14,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075566882] [2020-10-13 23:43:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:14,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:14,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:18,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:19,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:19,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:43:19,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:19,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5267 [2020-10-13 23:43:19,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:19,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:19,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:43:19,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:19,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:43:19,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:19,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:19,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:19,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:19,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:19,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:19,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:19,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:19,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:19,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 23:43:19,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075566882] [2020-10-13 23:43:19,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:19,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:43:19,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400933231] [2020-10-13 23:43:19,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:43:19,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:19,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:43:19,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:43:19,688 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand 15 states. [2020-10-13 23:43:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:19,953 INFO L93 Difference]: Finished difference Result 152 states and 198 transitions. [2020-10-13 23:43:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:43:19,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2020-10-13 23:43:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:19,955 INFO L225 Difference]: With dead ends: 152 [2020-10-13 23:43:19,955 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:43:19,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:43:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:43:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-10-13 23:43:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 23:43:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2020-10-13 23:43:19,962 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 81 [2020-10-13 23:43:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:19,963 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2020-10-13 23:43:19,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:43:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2020-10-13 23:43:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:43:19,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:19,964 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:19,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:43:19,964 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:19,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1427838660, now seen corresponding path program 12 times [2020-10-13 23:43:19,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:19,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66584618] [2020-10-13 23:43:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:19,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:20,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:25,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:25,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:43:25,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:43:25,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5141 [2020-10-13 23:43:25,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:25,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:25,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:43:25,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:25,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:43:25,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:25,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:25,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:25,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:25,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:25,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:25,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:25,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:25,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:25,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 23:43:25,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66584618] [2020-10-13 23:43:25,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:25,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:43:25,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552703183] [2020-10-13 23:43:25,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:43:25,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:43:25,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:43:25,292 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand 16 states. [2020-10-13 23:43:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:25,474 INFO L93 Difference]: Finished difference Result 161 states and 210 transitions. [2020-10-13 23:43:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:43:25,474 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-13 23:43:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:25,475 INFO L225 Difference]: With dead ends: 161 [2020-10-13 23:43:25,476 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 23:43:25,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:43:25,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 23:43:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2020-10-13 23:43:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:43:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2020-10-13 23:43:25,483 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 87 [2020-10-13 23:43:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:25,483 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2020-10-13 23:43:25,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:43:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2020-10-13 23:43:25,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 23:43:25,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:25,485 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:25,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:43:25,485 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:25,485 INFO L82 PathProgramCache]: Analyzing trace with hash 536110954, now seen corresponding path program 13 times [2020-10-13 23:43:25,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:25,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602728076] [2020-10-13 23:43:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:25,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:25,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:30,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:30,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 23:43:30,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:43:30,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:43:30,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:30,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:30,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:43:30,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 23:43:30,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:43:30,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:30,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:30,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:30,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:30,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:30,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:30,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:30,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:30,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:30,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:30,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:30,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:30,691 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 23:43:30,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602728076] [2020-10-13 23:43:30,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:30,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:43:30,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475196780] [2020-10-13 23:43:30,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:43:30,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:30,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:43:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:43:30,694 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand 17 states. [2020-10-13 23:43:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:30,943 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-10-13 23:43:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:43:30,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 93 [2020-10-13 23:43:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:30,945 INFO L225 Difference]: With dead ends: 170 [2020-10-13 23:43:30,945 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 23:43:30,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:43:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 23:43:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2020-10-13 23:43:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 23:43:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2020-10-13 23:43:30,959 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 93 [2020-10-13 23:43:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:30,960 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2020-10-13 23:43:30,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:43:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2020-10-13 23:43:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 23:43:30,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:30,962 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:30,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:43:30,962 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1548915068, now seen corresponding path program 14 times [2020-10-13 23:43:30,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:30,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604107998] [2020-10-13 23:43:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:31,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:32,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:33,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:36,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:36,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 23:43:36,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:43:36,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:43:36,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:36,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:36,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:43:36,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:43:36,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:43:36,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:36,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:36,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:36,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:36,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:36,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:36,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:36,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:36,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:36,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:36,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 23:43:36,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604107998] [2020-10-13 23:43:36,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:36,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:43:36,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705814469] [2020-10-13 23:43:36,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:43:36,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:36,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:43:36,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:43:36,220 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand 18 states. [2020-10-13 23:43:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:36,495 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-10-13 23:43:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:43:36,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 99 [2020-10-13 23:43:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:36,498 INFO L225 Difference]: With dead ends: 179 [2020-10-13 23:43:36,498 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:43:36,499 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 [2020-10-13 23:43:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:43:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2020-10-13 23:43:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 23:43:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2020-10-13 23:43:36,505 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 99 [2020-10-13 23:43:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:36,505 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2020-10-13 23:43:36,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:43:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2020-10-13 23:43:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 23:43:36,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:36,506 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:36,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:43:36,506 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:36,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1749588650, now seen corresponding path program 15 times [2020-10-13 23:43:36,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:36,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757425757] [2020-10-13 23:43:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:36,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:37,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:37,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:40,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:41,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:41,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 23:43:41,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:43:41,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5253 [2020-10-13 23:43:41,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:41,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:43:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 23:43:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:43:41,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:42,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:42,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:42,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:42,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:42,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:42,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:42,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:42,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:42,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:42,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:42,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:42,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 23:43:42,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757425757] [2020-10-13 23:43:42,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:42,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:43:42,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896589117] [2020-10-13 23:43:42,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:43:42,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:43:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:43:42,028 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand 19 states. [2020-10-13 23:43:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:42,321 INFO L93 Difference]: Finished difference Result 188 states and 246 transitions. [2020-10-13 23:43:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:43:42,322 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 105 [2020-10-13 23:43:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:42,323 INFO L225 Difference]: With dead ends: 188 [2020-10-13 23:43:42,323 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 23:43:42,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:43:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 23:43:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2020-10-13 23:43:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 23:43:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 157 transitions. [2020-10-13 23:43:42,334 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 157 transitions. Word has length 105 [2020-10-13 23:43:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:42,336 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 157 transitions. [2020-10-13 23:43:42,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:43:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 157 transitions. [2020-10-13 23:43:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 23:43:42,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:42,337 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:42,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:43:42,338 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1352783428, now seen corresponding path program 16 times [2020-10-13 23:43:42,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:42,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586525482] [2020-10-13 23:43:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:42,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:43,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:43,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:47,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:47,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 23:43:47,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:47,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 23:43:47,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:47,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:47,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:43:47,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:47,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:43:47,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:47,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:47,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:47,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:47,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:47,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:47,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:47,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:47,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:47,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:47,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 23:43:47,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586525482] [2020-10-13 23:43:47,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:47,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:43:47,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949688039] [2020-10-13 23:43:47,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:43:47,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:47,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:43:47,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:43:47,631 INFO L87 Difference]: Start difference. First operand 121 states and 157 transitions. Second operand 20 states. [2020-10-13 23:43:47,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:47,979 INFO L93 Difference]: Finished difference Result 197 states and 258 transitions. [2020-10-13 23:43:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:43:47,979 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2020-10-13 23:43:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:47,981 INFO L225 Difference]: With dead ends: 197 [2020-10-13 23:43:47,981 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 23:43:47,982 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 [2020-10-13 23:43:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 23:43:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-10-13 23:43:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 23:43:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2020-10-13 23:43:47,987 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 111 [2020-10-13 23:43:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:47,988 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2020-10-13 23:43:47,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:43:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2020-10-13 23:43:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:43:47,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:47,989 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:47,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:43:47,990 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:47,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:47,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1080311274, now seen corresponding path program 17 times [2020-10-13 23:43:47,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:47,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123503308] [2020-10-13 23:43:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:48,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:48,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:53,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:53,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:43:53,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:53,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-13 23:43:53,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:53,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:53,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:43:53,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 23:43:53,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 23:43:53,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:53,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:53,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:53,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:53,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:53,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:53,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:53,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:53,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 23:43:53,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123503308] [2020-10-13 23:43:53,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:53,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:43:53,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690737511] [2020-10-13 23:43:53,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:43:53,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:43:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:43:53,390 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand 21 states. [2020-10-13 23:43:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:53,720 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2020-10-13 23:43:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:43:53,721 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 117 [2020-10-13 23:43:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:53,722 INFO L225 Difference]: With dead ends: 206 [2020-10-13 23:43:53,722 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 23:43:53,723 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 [2020-10-13 23:43:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 23:43:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2020-10-13 23:43:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:43:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2020-10-13 23:43:53,734 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 117 [2020-10-13 23:43:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:53,734 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2020-10-13 23:43:53,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:43:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2020-10-13 23:43:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 23:43:53,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:53,736 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:53,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:43:53,736 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1998828028, now seen corresponding path program 18 times [2020-10-13 23:43:53,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:53,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631190230] [2020-10-13 23:43:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:53,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:53,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:58,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:58,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 23:43:58,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:43:58,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-13 23:43:58,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:58,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:43:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:58,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:43:58,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:59,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:59,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:59,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:59,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:59,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:59,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:59,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:59,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:59,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:59,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:59,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:59,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 23:43:59,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631190230] [2020-10-13 23:43:59,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:59,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:43:59,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804843480] [2020-10-13 23:43:59,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:43:59,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:59,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:43:59,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:43:59,114 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand 22 states. [2020-10-13 23:43:59,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:59,461 INFO L93 Difference]: Finished difference Result 215 states and 282 transitions. [2020-10-13 23:43:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:43:59,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 123 [2020-10-13 23:43:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:59,463 INFO L225 Difference]: With dead ends: 215 [2020-10-13 23:43:59,463 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 23:43:59,465 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 [2020-10-13 23:43:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 23:43:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2020-10-13 23:43:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 23:43:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2020-10-13 23:43:59,472 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 123 [2020-10-13 23:43:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:59,472 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2020-10-13 23:43:59,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:43:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2020-10-13 23:43:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 23:43:59,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:59,474 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:59,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:43:59,476 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash 128143658, now seen corresponding path program 19 times [2020-10-13 23:43:59,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:59,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768244384] [2020-10-13 23:43:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:59,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:59,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:04,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:04,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 23:44:04,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:04,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:44:04,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:04,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:44:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:44:04,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:04,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:04,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:04,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:04,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:04,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:04,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:04,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:04,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:04,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 23:44:04,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768244384] [2020-10-13 23:44:04,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:04,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:44:04,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986184063] [2020-10-13 23:44:04,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:44:04,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:04,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:44:04,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:44:04,850 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand 23 states. [2020-10-13 23:44:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:05,165 INFO L93 Difference]: Finished difference Result 224 states and 294 transitions. [2020-10-13 23:44:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:44:05,166 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 129 [2020-10-13 23:44:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:05,167 INFO L225 Difference]: With dead ends: 224 [2020-10-13 23:44:05,167 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 23:44:05,168 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 [2020-10-13 23:44:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 23:44:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-10-13 23:44:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 23:44:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 189 transitions. [2020-10-13 23:44:05,176 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 189 transitions. Word has length 129 [2020-10-13 23:44:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:05,176 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 189 transitions. [2020-10-13 23:44:05,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:44:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 189 transitions. [2020-10-13 23:44:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 23:44:05,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:05,178 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:05,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:44:05,178 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:05,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:05,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1237264956, now seen corresponding path program 20 times [2020-10-13 23:44:05,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:05,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78392749] [2020-10-13 23:44:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:05,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:06,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:08,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:10,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 23:44:10,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:10,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-13 23:44:10,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:10,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:10,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:44:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:44:10,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:10,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:10,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:10,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:10,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:10,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:10,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:10,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:10,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:10,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:10,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:10,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 23:44:10,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78392749] [2020-10-13 23:44:10,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:10,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:44:10,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107501874] [2020-10-13 23:44:10,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:44:10,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:10,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:44:10,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:44:10,715 INFO L87 Difference]: Start difference. First operand 145 states and 189 transitions. Second operand 24 states. [2020-10-13 23:44:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:11,086 INFO L93 Difference]: Finished difference Result 233 states and 306 transitions. [2020-10-13 23:44:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:44:11,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 135 [2020-10-13 23:44:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:11,089 INFO L225 Difference]: With dead ends: 233 [2020-10-13 23:44:11,090 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 23:44:11,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:44:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 23:44:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2020-10-13 23:44:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 23:44:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 197 transitions. [2020-10-13 23:44:11,098 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 197 transitions. Word has length 135 [2020-10-13 23:44:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:11,098 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 197 transitions. [2020-10-13 23:44:11,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:44:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 197 transitions. [2020-10-13 23:44:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 23:44:11,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:11,100 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:11,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:44:11,100 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1604201366, now seen corresponding path program 21 times [2020-10-13 23:44:11,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:11,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695382009] [2020-10-13 23:44:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:11,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:11,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:16,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:16,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 23:44:16,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:16,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5199 [2020-10-13 23:44:16,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:16,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:16,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:44:16,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-13 23:44:16,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:44:16,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:16,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:16,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:16,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:16,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:16,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:16,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:16,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:16,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:16,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-13 23:44:16,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695382009] [2020-10-13 23:44:16,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:16,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:44:16,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921764729] [2020-10-13 23:44:16,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:44:16,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:16,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:44:16,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:44:16,734 INFO L87 Difference]: Start difference. First operand 151 states and 197 transitions. Second operand 25 states. [2020-10-13 23:44:17,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:17,125 INFO L93 Difference]: Finished difference Result 242 states and 318 transitions. [2020-10-13 23:44:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:44:17,126 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 141 [2020-10-13 23:44:17,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:17,128 INFO L225 Difference]: With dead ends: 242 [2020-10-13 23:44:17,128 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 23:44:17,129 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 [2020-10-13 23:44:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 23:44:17,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-10-13 23:44:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 23:44:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 205 transitions. [2020-10-13 23:44:17,137 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 205 transitions. Word has length 141 [2020-10-13 23:44:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:17,137 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 205 transitions. [2020-10-13 23:44:17,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:44:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 205 transitions. [2020-10-13 23:44:17,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 23:44:17,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:17,139 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:17,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:44:17,140 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:17,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1078760060, now seen corresponding path program 22 times [2020-10-13 23:44:17,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:17,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60744688] [2020-10-13 23:44:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:17,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:18,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:20,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:23,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:23,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 23:44:23,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:23,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6811 [2020-10-13 23:44:23,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:23,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:23,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:44:23,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:23,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:44:23,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:24,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:24,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:24,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:24,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:24,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:24,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:24,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:24,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:24,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:24,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:24,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:24,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-13 23:44:24,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60744688] [2020-10-13 23:44:24,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:24,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:44:24,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643788321] [2020-10-13 23:44:24,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:44:24,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:24,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:44:24,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:44:24,406 INFO L87 Difference]: Start difference. First operand 157 states and 205 transitions. Second operand 26 states. [2020-10-13 23:44:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:24,761 INFO L93 Difference]: Finished difference Result 251 states and 330 transitions. [2020-10-13 23:44:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:44:24,762 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 147 [2020-10-13 23:44:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:24,763 INFO L225 Difference]: With dead ends: 251 [2020-10-13 23:44:24,763 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 23:44:24,764 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 [2020-10-13 23:44:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 23:44:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2020-10-13 23:44:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-13 23:44:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 213 transitions. [2020-10-13 23:44:24,773 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 213 transitions. Word has length 147 [2020-10-13 23:44:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:24,773 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 213 transitions. [2020-10-13 23:44:24,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:44:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 213 transitions. [2020-10-13 23:44:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 23:44:24,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:24,775 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:24,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:44:24,777 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash 805029802, now seen corresponding path program 23 times [2020-10-13 23:44:24,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:24,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104752064] [2020-10-13 23:44:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:24,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:26,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:28,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:32,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:32,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 23:44:32,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:32,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7851 [2020-10-13 23:44:32,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:32,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:32,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:44:32,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:32,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 23:44:32,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:33,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:33,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:33,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:33,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:33,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:33,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:33,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:33,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:33,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:33,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-13 23:44:33,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104752064] [2020-10-13 23:44:33,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:33,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:44:33,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2994997] [2020-10-13 23:44:33,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:44:33,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:33,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:44:33,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:44:33,105 INFO L87 Difference]: Start difference. First operand 163 states and 213 transitions. Second operand 27 states. [2020-10-13 23:44:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:33,539 INFO L93 Difference]: Finished difference Result 260 states and 342 transitions. [2020-10-13 23:44:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:44:33,539 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 153 [2020-10-13 23:44:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:33,541 INFO L225 Difference]: With dead ends: 260 [2020-10-13 23:44:33,541 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 23:44:33,542 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 [2020-10-13 23:44:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 23:44:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2020-10-13 23:44:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 23:44:33,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 221 transitions. [2020-10-13 23:44:33,548 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 221 transitions. Word has length 153 [2020-10-13 23:44:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:33,549 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 221 transitions. [2020-10-13 23:44:33,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:44:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 221 transitions. [2020-10-13 23:44:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 23:44:33,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:33,551 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:33,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:44:33,551 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:33,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:33,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1226315076, now seen corresponding path program 24 times [2020-10-13 23:44:33,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:33,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279712982] [2020-10-13 23:44:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:35,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:37,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:41,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:41,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 23:44:41,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:44:41,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8001 [2020-10-13 23:44:41,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:41,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:44:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 23:44:41,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:42,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:42,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:42,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:42,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:42,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:42,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:42,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:42,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:42,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:42,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:42,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:42,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-13 23:44:42,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279712982] [2020-10-13 23:44:42,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:42,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:44:42,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482580785] [2020-10-13 23:44:42,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:44:42,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:42,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:44:42,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:44:42,065 INFO L87 Difference]: Start difference. First operand 169 states and 221 transitions. Second operand 28 states. [2020-10-13 23:44:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:42,525 INFO L93 Difference]: Finished difference Result 269 states and 354 transitions. [2020-10-13 23:44:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:44:42,526 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-10-13 23:44:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:42,528 INFO L225 Difference]: With dead ends: 269 [2020-10-13 23:44:42,528 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 23:44:42,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:44:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 23:44:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2020-10-13 23:44:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-13 23:44:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 229 transitions. [2020-10-13 23:44:42,537 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 229 transitions. Word has length 159 [2020-10-13 23:44:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:42,537 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 229 transitions. [2020-10-13 23:44:42,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:44:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 229 transitions. [2020-10-13 23:44:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 23:44:42,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:42,539 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:42,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:44:42,539 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:42,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:42,540 INFO L82 PathProgramCache]: Analyzing trace with hash -556979478, now seen corresponding path program 25 times [2020-10-13 23:44:42,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:42,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652734260] [2020-10-13 23:44:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:42,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:45,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:48,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:48,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 23:44:48,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5666 [2020-10-13 23:44:48,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:48,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:44:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-13 23:44:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:44:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:48,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:48,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:48,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:48,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:48,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:48,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:44:48,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:48,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:48,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-13 23:44:48,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652734260] [2020-10-13 23:44:48,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:48,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:44:48,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039075880] [2020-10-13 23:44:48,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:44:48,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:44:48,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:44:48,786 INFO L87 Difference]: Start difference. First operand 175 states and 229 transitions. Second operand 29 states. [2020-10-13 23:44:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:49,276 INFO L93 Difference]: Finished difference Result 278 states and 366 transitions. [2020-10-13 23:44:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:44:49,277 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 165 [2020-10-13 23:44:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:49,278 INFO L225 Difference]: With dead ends: 278 [2020-10-13 23:44:49,278 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 23:44:49,279 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 [2020-10-13 23:44:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 23:44:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2020-10-13 23:44:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-13 23:44:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 237 transitions. [2020-10-13 23:44:49,287 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 237 transitions. Word has length 165 [2020-10-13 23:44:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:49,287 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 237 transitions. [2020-10-13 23:44:49,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:44:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 237 transitions. [2020-10-13 23:44:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 23:44:49,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:49,289 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:49,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:44:49,290 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:49,290 INFO L82 PathProgramCache]: Analyzing trace with hash -212677372, now seen corresponding path program 26 times [2020-10-13 23:44:49,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:49,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255995951] [2020-10-13 23:44:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:49,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:52,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:54,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:54,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 23:44:54,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:54,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-13 23:44:54,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:54,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:54,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:44:54,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 23:44:54,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:44:54,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:55,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:55,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:55,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:55,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:55,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:55,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:44:55,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:55,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:55,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:55,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:55,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:55,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-13 23:44:55,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255995951] [2020-10-13 23:44:55,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:55,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:44:55,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295936827] [2020-10-13 23:44:55,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:44:55,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:55,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:44:55,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:44:55,126 INFO L87 Difference]: Start difference. First operand 181 states and 237 transitions. Second operand 30 states. [2020-10-13 23:44:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:55,675 INFO L93 Difference]: Finished difference Result 287 states and 378 transitions. [2020-10-13 23:44:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:44:55,675 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 171 [2020-10-13 23:44:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:55,677 INFO L225 Difference]: With dead ends: 287 [2020-10-13 23:44:55,677 INFO L226 Difference]: Without dead ends: 191 [2020-10-13 23:44:55,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:44:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-13 23:44:55,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2020-10-13 23:44:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 23:44:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 245 transitions. [2020-10-13 23:44:55,687 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 245 transitions. Word has length 171 [2020-10-13 23:44:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:55,687 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 245 transitions. [2020-10-13 23:44:55,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:44:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 245 transitions. [2020-10-13 23:44:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 23:44:55,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:55,689 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:55,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:44:55,689 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1741554134, now seen corresponding path program 27 times [2020-10-13 23:44:55,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:55,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497543996] [2020-10-13 23:44:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:55,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:59,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:03,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:03,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 23:45:03,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:03,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7953 [2020-10-13 23:45:03,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:03,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:45:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 23:45:03,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:04,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:04,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:04,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:04,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:04,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:04,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:04,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:04,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:04,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:04,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:04,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:04,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-13 23:45:04,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497543996] [2020-10-13 23:45:04,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:04,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:45:04,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493094996] [2020-10-13 23:45:04,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:45:04,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:04,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:45:04,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:45:04,271 INFO L87 Difference]: Start difference. First operand 187 states and 245 transitions. Second operand 31 states. [2020-10-13 23:45:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:04,714 INFO L93 Difference]: Finished difference Result 296 states and 390 transitions. [2020-10-13 23:45:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:45:04,715 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 177 [2020-10-13 23:45:04,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:04,717 INFO L225 Difference]: With dead ends: 296 [2020-10-13 23:45:04,717 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 23:45:04,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:45:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 23:45:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2020-10-13 23:45:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-13 23:45:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 253 transitions. [2020-10-13 23:45:04,726 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 253 transitions. Word has length 177 [2020-10-13 23:45:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:04,726 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 253 transitions. [2020-10-13 23:45:04,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:45:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 253 transitions. [2020-10-13 23:45:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-13 23:45:04,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:04,728 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:04,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:45:04,729 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1673030460, now seen corresponding path program 28 times [2020-10-13 23:45:04,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:04,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749016435] [2020-10-13 23:45:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:04,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:08,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:15,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-13 23:45:15,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:15,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10728 [2020-10-13 23:45:15,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:15,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:15,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:45:15,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:15,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 23:45:15,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:16,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:16,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:16,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:16,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:16,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:16,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:16,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:16,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:16,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:16,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:16,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:16,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-13 23:45:16,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749016435] [2020-10-13 23:45:16,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:16,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:45:16,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734694076] [2020-10-13 23:45:16,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:45:16,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:16,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:45:16,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:45:16,119 INFO L87 Difference]: Start difference. First operand 193 states and 253 transitions. Second operand 32 states. [2020-10-13 23:45:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:16,714 INFO L93 Difference]: Finished difference Result 305 states and 402 transitions. [2020-10-13 23:45:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:45:16,714 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 183 [2020-10-13 23:45:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:16,716 INFO L225 Difference]: With dead ends: 305 [2020-10-13 23:45:16,716 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 23:45:16,717 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 [2020-10-13 23:45:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 23:45:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2020-10-13 23:45:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-13 23:45:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 261 transitions. [2020-10-13 23:45:16,729 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 261 transitions. Word has length 183 [2020-10-13 23:45:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:16,729 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 261 transitions. [2020-10-13 23:45:16,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:45:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 261 transitions. [2020-10-13 23:45:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-13 23:45:16,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:16,732 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:16,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:45:16,733 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash -897171094, now seen corresponding path program 29 times [2020-10-13 23:45:16,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:16,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092105432] [2020-10-13 23:45:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:16,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:21,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-13 23:45:21,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:21,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-13 23:45:21,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:21,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:21,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:45:21,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-13 23:45:21,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 23:45:21,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:22,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:22,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:22,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:22,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:22,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:22,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:22,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:22,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:22,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:22,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:22,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:22,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-13 23:45:22,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092105432] [2020-10-13 23:45:22,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:22,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:45:22,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110679374] [2020-10-13 23:45:22,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:45:22,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:22,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:45:22,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:45:22,536 INFO L87 Difference]: Start difference. First operand 199 states and 261 transitions. Second operand 33 states. [2020-10-13 23:45:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:23,023 INFO L93 Difference]: Finished difference Result 314 states and 414 transitions. [2020-10-13 23:45:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:45:23,024 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 189 [2020-10-13 23:45:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:23,026 INFO L225 Difference]: With dead ends: 314 [2020-10-13 23:45:23,026 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 23:45:23,028 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 [2020-10-13 23:45:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 23:45:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2020-10-13 23:45:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 23:45:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 269 transitions. [2020-10-13 23:45:23,038 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 269 transitions. Word has length 189 [2020-10-13 23:45:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:23,039 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 269 transitions. [2020-10-13 23:45:23,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:45:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 269 transitions. [2020-10-13 23:45:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 23:45:23,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:23,041 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:23,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:45:23,041 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:23,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1629852540, now seen corresponding path program 30 times [2020-10-13 23:45:23,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:23,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106999553] [2020-10-13 23:45:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:23,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:28,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:28,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:28,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-13 23:45:28,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:28,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-13 23:45:28,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:28,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:28,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:45:28,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:28,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 23:45:28,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:29,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:29,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:29,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:29,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:29,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:29,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:29,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:29,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:29,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:29,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:29,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:29,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-13 23:45:29,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106999553] [2020-10-13 23:45:29,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:29,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:45:29,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202794612] [2020-10-13 23:45:29,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:45:29,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:29,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:45:29,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:45:29,054 INFO L87 Difference]: Start difference. First operand 205 states and 269 transitions. Second operand 34 states. [2020-10-13 23:45:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:29,691 INFO L93 Difference]: Finished difference Result 323 states and 426 transitions. [2020-10-13 23:45:29,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:45:29,692 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 195 [2020-10-13 23:45:29,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:29,693 INFO L225 Difference]: With dead ends: 323 [2020-10-13 23:45:29,693 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 23:45:29,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:45:29,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 23:45:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2020-10-13 23:45:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-13 23:45:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2020-10-13 23:45:29,703 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 195 [2020-10-13 23:45:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:29,704 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2020-10-13 23:45:29,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:45:29,704 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2020-10-13 23:45:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 23:45:29,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:29,706 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:29,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:45:29,707 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:29,707 INFO L82 PathProgramCache]: Analyzing trace with hash 656798890, now seen corresponding path program 31 times [2020-10-13 23:45:29,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:29,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684175219] [2020-10-13 23:45:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:29,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:29,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:35,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:35,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-13 23:45:35,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:35,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5282 [2020-10-13 23:45:35,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:35,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:45:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 23:45:35,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:35,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:35,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:35,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:35,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:35,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:35,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:35,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:35,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:35,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:35,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:35,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:35,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-13 23:45:35,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684175219] [2020-10-13 23:45:35,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:35,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:45:35,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902424424] [2020-10-13 23:45:35,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:45:35,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:35,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:45:35,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:45:35,767 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand 35 states. [2020-10-13 23:45:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:36,312 INFO L93 Difference]: Finished difference Result 332 states and 438 transitions. [2020-10-13 23:45:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:45:36,313 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 201 [2020-10-13 23:45:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:36,314 INFO L225 Difference]: With dead ends: 332 [2020-10-13 23:45:36,314 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 23:45:36,316 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 [2020-10-13 23:45:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 23:45:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 217. [2020-10-13 23:45:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-13 23:45:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 285 transitions. [2020-10-13 23:45:36,323 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 285 transitions. Word has length 201 [2020-10-13 23:45:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:36,324 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 285 transitions. [2020-10-13 23:45:36,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:45:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 285 transitions. [2020-10-13 23:45:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 23:45:36,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:36,325 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:36,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:45:36,326 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:36,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:36,326 INFO L82 PathProgramCache]: Analyzing trace with hash 317674564, now seen corresponding path program 32 times [2020-10-13 23:45:36,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:36,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757096319] [2020-10-13 23:45:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:36,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:41,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:41,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 23:45:41,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:41,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:45:41,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:41,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:41,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:45:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 23:45:41,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:42,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:42,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:42,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:42,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:42,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:42,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:42,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:42,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:42,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:42,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:42,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:42,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-13 23:45:42,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757096319] [2020-10-13 23:45:42,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:42,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:45:42,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293821684] [2020-10-13 23:45:42,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:45:42,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:45:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:45:42,155 INFO L87 Difference]: Start difference. First operand 217 states and 285 transitions. Second operand 36 states. [2020-10-13 23:45:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:42,751 INFO L93 Difference]: Finished difference Result 341 states and 450 transitions. [2020-10-13 23:45:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:45:42,752 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 207 [2020-10-13 23:45:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:42,753 INFO L225 Difference]: With dead ends: 341 [2020-10-13 23:45:42,753 INFO L226 Difference]: Without dead ends: 227 [2020-10-13 23:45:42,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:45:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-13 23:45:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2020-10-13 23:45:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-13 23:45:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 293 transitions. [2020-10-13 23:45:42,763 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 293 transitions. Word has length 207 [2020-10-13 23:45:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:42,763 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 293 transitions. [2020-10-13 23:45:42,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:45:42,763 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 293 transitions. [2020-10-13 23:45:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-13 23:45:42,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:42,765 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:42,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:45:42,765 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:42,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1651316714, now seen corresponding path program 33 times [2020-10-13 23:45:42,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:42,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891872976] [2020-10-13 23:45:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:42,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:47,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:47,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-13 23:45:47,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:47,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5169 [2020-10-13 23:45:47,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:47,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:45:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-13 23:45:47,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:48,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:48,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:48,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:48,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:48,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:48,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:48,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:48,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:48,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:48,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:48,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:48,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-13 23:45:48,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891872976] [2020-10-13 23:45:48,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:48,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:45:48,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727404356] [2020-10-13 23:45:48,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:45:48,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:48,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:45:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:45:48,750 INFO L87 Difference]: Start difference. First operand 223 states and 293 transitions. Second operand 37 states. [2020-10-13 23:45:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:49,417 INFO L93 Difference]: Finished difference Result 350 states and 462 transitions. [2020-10-13 23:45:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:45:49,418 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 213 [2020-10-13 23:45:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:49,421 INFO L225 Difference]: With dead ends: 350 [2020-10-13 23:45:49,421 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 23:45:49,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:45:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 23:45:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2020-10-13 23:45:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-13 23:45:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 301 transitions. [2020-10-13 23:45:49,429 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 301 transitions. Word has length 213 [2020-10-13 23:45:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:49,430 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 301 transitions. [2020-10-13 23:45:49,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:45:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 301 transitions. [2020-10-13 23:45:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-13 23:45:49,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:49,432 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:49,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:45:49,432 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash 225070084, now seen corresponding path program 34 times [2020-10-13 23:45:49,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:49,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684099160] [2020-10-13 23:45:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:49,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:54,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:54,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-13 23:45:54,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:54,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-13 23:45:54,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:54,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:45:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 23:45:54,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:55,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:55,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:55,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:55,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:55,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:55,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:55,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:55,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:55,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:55,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:55,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:55,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-13 23:45:55,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684099160] [2020-10-13 23:45:55,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:55,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:45:55,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800335795] [2020-10-13 23:45:55,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:45:55,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:55,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:45:55,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:45:55,389 INFO L87 Difference]: Start difference. First operand 229 states and 301 transitions. Second operand 38 states. [2020-10-13 23:45:56,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:56,036 INFO L93 Difference]: Finished difference Result 359 states and 474 transitions. [2020-10-13 23:45:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:45:56,036 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 219 [2020-10-13 23:45:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:56,039 INFO L225 Difference]: With dead ends: 359 [2020-10-13 23:45:56,039 INFO L226 Difference]: Without dead ends: 239 [2020-10-13 23:45:56,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:45:56,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-13 23:45:56,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2020-10-13 23:45:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-13 23:45:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 309 transitions. [2020-10-13 23:45:56,048 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 309 transitions. Word has length 219 [2020-10-13 23:45:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:56,049 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 309 transitions. [2020-10-13 23:45:56,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:45:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 309 transitions. [2020-10-13 23:45:56,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-13 23:45:56,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:56,050 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:56,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:45:56,051 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:56,051 INFO L82 PathProgramCache]: Analyzing trace with hash -206066902, now seen corresponding path program 35 times [2020-10-13 23:45:56,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:56,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836249761] [2020-10-13 23:45:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:56,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:01,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:01,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-13 23:46:01,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:01,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-13 23:46:01,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:01,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:01,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:46:01,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:01,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-13 23:46:01,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:01,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:01,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:01,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:01,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:01,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:01,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:01,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:01,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:01,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:01,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-13 23:46:02,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836249761] [2020-10-13 23:46:02,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:02,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:46:02,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387289589] [2020-10-13 23:46:02,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:46:02,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:02,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:46:02,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:46:02,021 INFO L87 Difference]: Start difference. First operand 235 states and 309 transitions. Second operand 39 states. [2020-10-13 23:46:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:02,681 INFO L93 Difference]: Finished difference Result 368 states and 486 transitions. [2020-10-13 23:46:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:46:02,681 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 225 [2020-10-13 23:46:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:02,683 INFO L225 Difference]: With dead ends: 368 [2020-10-13 23:46:02,683 INFO L226 Difference]: Without dead ends: 245 [2020-10-13 23:46:02,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:46:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-13 23:46:02,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2020-10-13 23:46:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-13 23:46:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 317 transitions. [2020-10-13 23:46:02,692 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 317 transitions. Word has length 225 [2020-10-13 23:46:02,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:02,692 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 317 transitions. [2020-10-13 23:46:02,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:46:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 317 transitions. [2020-10-13 23:46:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-13 23:46:02,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:02,694 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:02,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:46:02,695 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:02,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:02,695 INFO L82 PathProgramCache]: Analyzing trace with hash -533769276, now seen corresponding path program 36 times [2020-10-13 23:46:02,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:02,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064377284] [2020-10-13 23:46:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:02,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:07,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:07,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-13 23:46:07,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:07,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5178 [2020-10-13 23:46:07,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:07,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:46:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:07,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-13 23:46:07,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:08,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:08,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:08,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:08,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:08,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:08,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:08,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:08,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:08,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:08,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:08,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:08,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-13 23:46:08,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064377284] [2020-10-13 23:46:08,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:08,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:46:08,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543358614] [2020-10-13 23:46:08,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:46:08,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:08,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:46:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:46:08,884 INFO L87 Difference]: Start difference. First operand 241 states and 317 transitions. Second operand 40 states. [2020-10-13 23:46:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:09,467 INFO L93 Difference]: Finished difference Result 377 states and 498 transitions. [2020-10-13 23:46:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:46:09,468 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 231 [2020-10-13 23:46:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:09,470 INFO L225 Difference]: With dead ends: 377 [2020-10-13 23:46:09,470 INFO L226 Difference]: Without dead ends: 251 [2020-10-13 23:46:09,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:46:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-13 23:46:09,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2020-10-13 23:46:09,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-13 23:46:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 325 transitions. [2020-10-13 23:46:09,478 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 325 transitions. Word has length 231 [2020-10-13 23:46:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:09,478 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 325 transitions. [2020-10-13 23:46:09,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:46:09,479 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 325 transitions. [2020-10-13 23:46:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-13 23:46:09,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:09,480 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:09,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:46:09,481 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash -715018646, now seen corresponding path program 37 times [2020-10-13 23:46:09,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:09,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822781181] [2020-10-13 23:46:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:09,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:09,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:14,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:14,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-13 23:46:14,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:14,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5196 [2020-10-13 23:46:14,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:14,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:14,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:46:14,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 124 [2020-10-13 23:46:14,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 23:46:14,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:15,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:15,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:15,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:15,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:15,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:15,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:15,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:15,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:15,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:15,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:15,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:15,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-10-13 23:46:15,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822781181] [2020-10-13 23:46:15,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:15,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:46:15,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799838947] [2020-10-13 23:46:15,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:46:15,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:15,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:46:15,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:46:15,731 INFO L87 Difference]: Start difference. First operand 247 states and 325 transitions. Second operand 41 states. [2020-10-13 23:46:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:16,468 INFO L93 Difference]: Finished difference Result 386 states and 510 transitions. [2020-10-13 23:46:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:46:16,469 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 237 [2020-10-13 23:46:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:16,471 INFO L225 Difference]: With dead ends: 386 [2020-10-13 23:46:16,471 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 23:46:16,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:46:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 23:46:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 253. [2020-10-13 23:46:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-13 23:46:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 333 transitions. [2020-10-13 23:46:16,479 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 333 transitions. Word has length 237 [2020-10-13 23:46:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:16,479 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 333 transitions. [2020-10-13 23:46:16,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:46:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 333 transitions. [2020-10-13 23:46:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-13 23:46:16,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:16,481 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:16,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:46:16,481 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:16,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:16,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1512205188, now seen corresponding path program 38 times [2020-10-13 23:46:16,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:16,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536689196] [2020-10-13 23:46:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:16,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking...