/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:52:36,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:52:36,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:52:37,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:52:37,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:52:37,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:52:37,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:52:37,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:52:37,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:52:37,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:52:37,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:52:37,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:52:37,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:52:37,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:52:37,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:52:37,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:52:37,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:52:37,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:52:37,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:52:37,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:52:37,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:52:37,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:52:37,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:52:37,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:52:37,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:52:37,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:52:37,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:52:37,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:52:37,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:52:37,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:52:37,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:52:37,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:52:37,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:52:37,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:52:37,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:52:37,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:52:37,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:52:37,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:52:37,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:52:37,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:52:37,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:52:37,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 17:52:37,077 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:52:37,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:52:37,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:52:37,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:52:37,082 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:52:37,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:52:37,083 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:52:37,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:52:37,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:52:37,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:52:37,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:52:37,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:52:37,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:52:37,086 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:52:37,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:52:37,086 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:52:37,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:52:37,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:52:37,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:52:37,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:52:37,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:52:37,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:52:37,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:52:37,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:52:37,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:52:37,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:52:37,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:52:37,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:52:37,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:52:37,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:52:37,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:52:37,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:52:37,418 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:52:37,421 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:52:37,422 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:52:37,422 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2020-10-14 17:52:37,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/148c94992/e767b4b486d64bf683a8bc90dae08ca1/FLAG53dee987b [2020-10-14 17:52:37,905 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:52:37,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2020-10-14 17:52:37,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/148c94992/e767b4b486d64bf683a8bc90dae08ca1/FLAG53dee987b [2020-10-14 17:52:38,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/148c94992/e767b4b486d64bf683a8bc90dae08ca1 [2020-10-14 17:52:38,304 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:52:38,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:52:38,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:52:38,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:52:38,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:52:38,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:52:38" (1/1) ... [2020-10-14 17:52:38,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ad46c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38, skipping insertion in model container [2020-10-14 17:52:38,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:52:38" (1/1) ... [2020-10-14 17:52:38,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:52:38,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:52:38,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:52:38,523 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:52:38,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:52:38,654 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:52:38,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38 WrapperNode [2020-10-14 17:52:38,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:52:38,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:52:38,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:52:38,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:52:38,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38" (1/1) ... [2020-10-14 17:52:38,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38" (1/1) ... [2020-10-14 17:52:38,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38" (1/1) ... [2020-10-14 17:52:38,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38" (1/1) ... [2020-10-14 17:52:38,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38" (1/1) ... [2020-10-14 17:52:38,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38" (1/1) ... [2020-10-14 17:52:38,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38" (1/1) ... [2020-10-14 17:52:38,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:52:38,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:52:38,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:52:38,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:52:38,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:52:38,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:52:38,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:52:38,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:52:38,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:52:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:52:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:52:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:52:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:52:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:52:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:52:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:52:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:52:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:52:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:52:39,112 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:52:39,112 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-14 17:52:39,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:52:39 BoogieIcfgContainer [2020-10-14 17:52:39,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:52:39,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:52:39,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:52:39,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:52:39,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:52:38" (1/3) ... [2020-10-14 17:52:39,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ff6a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:52:39, skipping insertion in model container [2020-10-14 17:52:39,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:52:38" (2/3) ... [2020-10-14 17:52:39,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ff6a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:52:39, skipping insertion in model container [2020-10-14 17:52:39,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:52:39" (3/3) ... [2020-10-14 17:52:39,125 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2020-10-14 17:52:39,136 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:52:39,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:52:39,163 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:52:39,196 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:52:39,196 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:52:39,196 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:52:39,196 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:52:39,197 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:52:39,197 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:52:39,197 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:52:39,197 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:52:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-14 17:52:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 17:52:39,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:39,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:39,229 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash -178932642, now seen corresponding path program 1 times [2020-10-14 17:52:39,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:39,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344583751] [2020-10-14 17:52:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:39,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:40,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:40,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:42,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 17:52:42,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:52:42,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3045 [2020-10-14 17:52:42,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:42,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:52:42,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 17:52:42,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:52:42,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:52:42,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:42,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:42,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:42,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:42,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:52:42,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:42,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:42,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:42,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:52:42,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344583751] [2020-10-14 17:52:42,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:52:42,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:52:42,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281621572] [2020-10-14 17:52:42,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:52:42,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:42,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:52:42,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:52:42,539 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 4 states. [2020-10-14 17:52:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:42,795 INFO L93 Difference]: Finished difference Result 112 states and 173 transitions. [2020-10-14 17:52:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:52:42,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-14 17:52:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:42,810 INFO L225 Difference]: With dead ends: 112 [2020-10-14 17:52:42,810 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 17:52:42,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:52:42,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 17:52:42,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-10-14 17:52:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 17:52:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-14 17:52:42,871 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 31 [2020-10-14 17:52:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:42,872 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-14 17:52:42,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:52:42,872 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-14 17:52:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 17:52:42,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:42,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:42,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:52:42,875 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:42,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:42,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1898370412, now seen corresponding path program 1 times [2020-10-14 17:52:42,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:42,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637688219] [2020-10-14 17:52:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:42,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:42,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:43,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:44,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:47,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:47,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 17:52:47,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:52:47,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 17:52:47,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:47,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:47,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:52:47,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 17:52:47,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:52:47,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:47,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:47,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:47,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:47,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:47,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:47,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:47,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:47,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:47,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:47,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 17:52:47,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637688219] [2020-10-14 17:52:47,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:47,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:52:47,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458878674] [2020-10-14 17:52:47,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:52:47,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:47,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:52:47,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:52:47,957 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 5 states. [2020-10-14 17:52:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:48,180 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2020-10-14 17:52:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:52:48,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-10-14 17:52:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:48,182 INFO L225 Difference]: With dead ends: 125 [2020-10-14 17:52:48,183 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 17:52:48,184 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 [2020-10-14 17:52:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 17:52:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2020-10-14 17:52:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 17:52:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-14 17:52:48,195 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 49 [2020-10-14 17:52:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:48,195 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-14 17:52:48,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:52:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-14 17:52:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 17:52:48,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:48,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:48,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:52:48,198 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:48,199 INFO L82 PathProgramCache]: Analyzing trace with hash -885045022, now seen corresponding path program 2 times [2020-10-14 17:52:48,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:48,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50313284] [2020-10-14 17:52:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:48,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:52,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:53,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 17:52:53,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:52:53,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:52:53,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:53,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:52:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 17:52:53,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:52:53,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:53,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:53,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:53,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:53,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:52:53,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:53,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:53,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:53,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:53,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:53,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-14 17:52:53,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50313284] [2020-10-14 17:52:53,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:53,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:52:53,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528056754] [2020-10-14 17:52:53,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:52:53,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:53,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:52:53,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:52:53,285 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 6 states. [2020-10-14 17:52:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:53,559 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2020-10-14 17:52:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:52:53,560 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-14 17:52:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:53,561 INFO L225 Difference]: With dead ends: 159 [2020-10-14 17:52:53,561 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 17:52:53,562 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 [2020-10-14 17:52:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 17:52:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2020-10-14 17:52:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 17:52:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2020-10-14 17:52:53,573 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 67 [2020-10-14 17:52:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:53,574 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2020-10-14 17:52:53,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:52:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2020-10-14 17:52:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 17:52:53,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:53,576 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:53,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:52:53,576 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:53,576 INFO L82 PathProgramCache]: Analyzing trace with hash 433336240, now seen corresponding path program 3 times [2020-10-14 17:52:53,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:53,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184679913] [2020-10-14 17:52:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:53,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:54,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:58,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:58,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 17:52:58,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:52:58,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:52:58,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:58,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:52:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 17:52:58,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:52:58,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-14 17:52:58,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:58,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:58,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:58,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:58,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:58,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:52:58,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:58,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-14 17:52:58,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184679913] [2020-10-14 17:52:58,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:58,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:52:58,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181451267] [2020-10-14 17:52:58,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:52:58,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:58,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:52:58,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:52:58,685 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 7 states. [2020-10-14 17:52:58,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:58,981 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2020-10-14 17:52:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:52:58,982 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-10-14 17:52:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:58,983 INFO L225 Difference]: With dead ends: 193 [2020-10-14 17:52:58,983 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 17:52:58,985 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 [2020-10-14 17:52:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 17:52:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2020-10-14 17:52:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 17:52:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-10-14 17:52:59,005 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 85 [2020-10-14 17:52:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:59,006 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-10-14 17:52:59,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:52:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-10-14 17:52:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-14 17:52:59,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:59,009 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:59,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:52:59,011 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:59,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1458127106, now seen corresponding path program 4 times [2020-10-14 17:52:59,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:59,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872914733] [2020-10-14 17:52:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:59,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:00,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:04,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:04,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-14 17:53:04,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:53:04,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:53:04,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:04,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:04,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:53:04,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-14 17:53:04,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:53:04,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:04,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:04,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:04,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:04,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:04,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:04,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:04,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:04,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:04,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:04,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:04,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:04,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-14 17:53:04,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872914733] [2020-10-14 17:53:04,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:04,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:53:04,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788421927] [2020-10-14 17:53:04,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:53:04,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:53:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:53:04,158 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 8 states. [2020-10-14 17:53:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:04,496 INFO L93 Difference]: Finished difference Result 227 states and 254 transitions. [2020-10-14 17:53:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:53:04,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2020-10-14 17:53:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:04,498 INFO L225 Difference]: With dead ends: 227 [2020-10-14 17:53:04,498 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 17:53:04,501 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 [2020-10-14 17:53:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 17:53:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2020-10-14 17:53:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 17:53:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2020-10-14 17:53:04,510 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 103 [2020-10-14 17:53:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:04,511 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2020-10-14 17:53:04,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:53:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2020-10-14 17:53:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-14 17:53:04,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:04,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:04,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:53:04,513 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:04,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash -846342452, now seen corresponding path program 5 times [2020-10-14 17:53:04,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:04,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300593283] [2020-10-14 17:53:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:04,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:04,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:04,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:04,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:04,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:07,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:09,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:09,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 17:53:09,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:53:09,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 17:53:09,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:09,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:09,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:53:09,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:53:09,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:53:09,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:09,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:09,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:09,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:09,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:09,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:09,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:09,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:09,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:09,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:09,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:09,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:09,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-14 17:53:09,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300593283] [2020-10-14 17:53:09,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:09,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:53:09,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718567383] [2020-10-14 17:53:09,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:53:09,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:09,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:53:09,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:53:09,628 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 9 states. [2020-10-14 17:53:09,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:09,980 INFO L93 Difference]: Finished difference Result 261 states and 288 transitions. [2020-10-14 17:53:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:53:09,981 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2020-10-14 17:53:09,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:09,982 INFO L225 Difference]: With dead ends: 261 [2020-10-14 17:53:09,982 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 17:53:09,984 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 [2020-10-14 17:53:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 17:53:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2020-10-14 17:53:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 17:53:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2020-10-14 17:53:09,993 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 121 [2020-10-14 17:53:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:09,994 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2020-10-14 17:53:09,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:53:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2020-10-14 17:53:09,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-14 17:53:09,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:09,996 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:09,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:53:09,997 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1882695910, now seen corresponding path program 6 times [2020-10-14 17:53:09,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:09,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50709931] [2020-10-14 17:53:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:10,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:10,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:10,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:10,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:10,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:13,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:15,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:15,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-14 17:53:15,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:53:15,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-14 17:53:15,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:15,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:15,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:53:15,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:53:15,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:53:15,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:15,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:15,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:15,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:15,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:15,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:15,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:15,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:15,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:15,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:15,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:15,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:15,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-14 17:53:15,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50709931] [2020-10-14 17:53:15,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:15,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:53:15,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673398814] [2020-10-14 17:53:15,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:53:15,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:15,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:53:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:53:15,176 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand 10 states. [2020-10-14 17:53:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:15,751 INFO L93 Difference]: Finished difference Result 295 states and 322 transitions. [2020-10-14 17:53:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:53:15,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 139 [2020-10-14 17:53:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:15,753 INFO L225 Difference]: With dead ends: 295 [2020-10-14 17:53:15,753 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 17:53:15,754 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 [2020-10-14 17:53:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 17:53:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 163. [2020-10-14 17:53:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-14 17:53:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 173 transitions. [2020-10-14 17:53:15,774 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 173 transitions. Word has length 139 [2020-10-14 17:53:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:15,775 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 173 transitions. [2020-10-14 17:53:15,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:53:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 173 transitions. [2020-10-14 17:53:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-14 17:53:15,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:15,779 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:15,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:53:15,779 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:15,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1168302104, now seen corresponding path program 7 times [2020-10-14 17:53:15,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:15,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663992747] [2020-10-14 17:53:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:15,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:15,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:15,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:15,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:15,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:15,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:20,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:20,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 17:53:20,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:20,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-14 17:53:20,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:20,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:20,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:53:20,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-14 17:53:20,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:53:20,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:20,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:20,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:20,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:20,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:20,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:20,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:20,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:20,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:20,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-14 17:53:21,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663992747] [2020-10-14 17:53:21,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:21,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:53:21,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873630367] [2020-10-14 17:53:21,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:53:21,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:21,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:53:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:53:21,011 INFO L87 Difference]: Start difference. First operand 163 states and 173 transitions. Second operand 11 states. [2020-10-14 17:53:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:21,473 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2020-10-14 17:53:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:53:21,473 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 157 [2020-10-14 17:53:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:21,475 INFO L225 Difference]: With dead ends: 329 [2020-10-14 17:53:21,475 INFO L226 Difference]: Without dead ends: 190 [2020-10-14 17:53:21,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:53:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-14 17:53:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2020-10-14 17:53:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-14 17:53:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2020-10-14 17:53:21,488 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 157 [2020-10-14 17:53:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:21,489 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2020-10-14 17:53:21,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:53:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2020-10-14 17:53:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-14 17:53:21,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:21,491 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:21,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:53:21,491 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:21,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1743458614, now seen corresponding path program 8 times [2020-10-14 17:53:21,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:21,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152508572] [2020-10-14 17:53:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:21,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:21,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:21,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:21,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:21,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:21,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:26,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:26,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-14 17:53:26,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:26,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-14 17:53:26,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:26,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:26,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:53:26,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-14 17:53:26,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:53:26,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:26,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:26,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:26,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:26,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:26,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:26,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:26,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:26,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:26,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:26,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:26,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:26,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-14 17:53:26,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152508572] [2020-10-14 17:53:26,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:26,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:53:26,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971600096] [2020-10-14 17:53:26,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:53:26,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:53:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:53:26,692 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand 12 states. [2020-10-14 17:53:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:27,279 INFO L93 Difference]: Finished difference Result 363 states and 390 transitions. [2020-10-14 17:53:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:53:27,280 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 175 [2020-10-14 17:53:27,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:27,281 INFO L225 Difference]: With dead ends: 363 [2020-10-14 17:53:27,281 INFO L226 Difference]: Without dead ends: 208 [2020-10-14 17:53:27,282 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 [2020-10-14 17:53:27,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-14 17:53:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 199. [2020-10-14 17:53:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-14 17:53:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 209 transitions. [2020-10-14 17:53:27,289 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 209 transitions. Word has length 175 [2020-10-14 17:53:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:27,290 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 209 transitions. [2020-10-14 17:53:27,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:53:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 209 transitions. [2020-10-14 17:53:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-14 17:53:27,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:27,292 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:27,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:53:27,292 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:27,293 INFO L82 PathProgramCache]: Analyzing trace with hash 286853892, now seen corresponding path program 9 times [2020-10-14 17:53:27,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:27,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532665] [2020-10-14 17:53:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:27,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:27,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:27,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:27,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:27,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:27,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:32,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:32,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-14 17:53:32,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:32,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-14 17:53:32,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:32,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:53:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-14 17:53:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:53:32,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:32,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:32,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:32,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:32,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:32,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:32,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:32,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:32,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:32,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:32,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-14 17:53:32,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532665] [2020-10-14 17:53:32,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:32,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:53:32,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728227184] [2020-10-14 17:53:32,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:53:32,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:32,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:53:32,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:53:32,539 INFO L87 Difference]: Start difference. First operand 199 states and 209 transitions. Second operand 13 states. [2020-10-14 17:53:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:33,103 INFO L93 Difference]: Finished difference Result 397 states and 424 transitions. [2020-10-14 17:53:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:53:33,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 193 [2020-10-14 17:53:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:33,106 INFO L225 Difference]: With dead ends: 397 [2020-10-14 17:53:33,106 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 17:53:33,107 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 [2020-10-14 17:53:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 17:53:33,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 217. [2020-10-14 17:53:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-14 17:53:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 227 transitions. [2020-10-14 17:53:33,115 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 227 transitions. Word has length 193 [2020-10-14 17:53:33,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:33,116 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 227 transitions. [2020-10-14 17:53:33,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:53:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 227 transitions. [2020-10-14 17:53:33,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-14 17:53:33,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:33,118 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:33,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:53:33,119 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash 446033234, now seen corresponding path program 10 times [2020-10-14 17:53:33,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:33,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044016563] [2020-10-14 17:53:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:33,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:33,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:33,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:33,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:33,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:33,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:38,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:38,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-14 17:53:38,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:38,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-14 17:53:38,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:38,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:38,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:53:38,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:53:38,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:53:38,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:38,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:38,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:38,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:38,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:38,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:38,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:38,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:38,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:38,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:38,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:38,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:38,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-14 17:53:38,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044016563] [2020-10-14 17:53:38,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:38,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:53:38,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273916169] [2020-10-14 17:53:38,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:53:38,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:38,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:53:38,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:53:38,321 INFO L87 Difference]: Start difference. First operand 217 states and 227 transitions. Second operand 14 states. [2020-10-14 17:53:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:38,928 INFO L93 Difference]: Finished difference Result 431 states and 458 transitions. [2020-10-14 17:53:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:53:38,929 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 211 [2020-10-14 17:53:38,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:38,931 INFO L225 Difference]: With dead ends: 431 [2020-10-14 17:53:38,932 INFO L226 Difference]: Without dead ends: 244 [2020-10-14 17:53:38,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:53:38,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-14 17:53:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 235. [2020-10-14 17:53:38,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 17:53:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 245 transitions. [2020-10-14 17:53:38,940 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 245 transitions. Word has length 211 [2020-10-14 17:53:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:38,941 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 245 transitions. [2020-10-14 17:53:38,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:53:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 245 transitions. [2020-10-14 17:53:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-14 17:53:38,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:38,944 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:38,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:53:38,944 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:38,945 INFO L82 PathProgramCache]: Analyzing trace with hash -484927456, now seen corresponding path program 11 times [2020-10-14 17:53:38,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:38,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802039381] [2020-10-14 17:53:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:38,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:38,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:39,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:39,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:39,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:39,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:43,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:43,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-14 17:53:43,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:43,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 17:53:43,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:43,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:53:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 17:53:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:53:43,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:44,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:44,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:44,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:44,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:44,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:44,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:44,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:44,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:44,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:44,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:44,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:44,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-14 17:53:44,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802039381] [2020-10-14 17:53:44,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:44,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:53:44,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358523639] [2020-10-14 17:53:44,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:53:44,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:53:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:53:44,152 INFO L87 Difference]: Start difference. First operand 235 states and 245 transitions. Second operand 15 states. [2020-10-14 17:53:44,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:44,804 INFO L93 Difference]: Finished difference Result 465 states and 492 transitions. [2020-10-14 17:53:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:53:44,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 229 [2020-10-14 17:53:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:44,807 INFO L225 Difference]: With dead ends: 465 [2020-10-14 17:53:44,807 INFO L226 Difference]: Without dead ends: 262 [2020-10-14 17:53:44,808 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 [2020-10-14 17:53:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-14 17:53:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 253. [2020-10-14 17:53:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-14 17:53:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 263 transitions. [2020-10-14 17:53:44,818 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 263 transitions. Word has length 229 [2020-10-14 17:53:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:44,818 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 263 transitions. [2020-10-14 17:53:44,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:53:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 263 transitions. [2020-10-14 17:53:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-14 17:53:44,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:44,820 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:44,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:53:44,821 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1365240686, now seen corresponding path program 12 times [2020-10-14 17:53:44,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:44,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870483517] [2020-10-14 17:53:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:44,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:44,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:44,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:44,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:44,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:44,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:49,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:49,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-14 17:53:49,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:49,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-10-14 17:53:49,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:49,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:49,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:53:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 17:53:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:53:49,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:50,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:50,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:50,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:50,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:50,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:50,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:50,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:50,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:50,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:50,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:50,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:50,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-14 17:53:50,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870483517] [2020-10-14 17:53:50,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:50,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:53:50,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517281244] [2020-10-14 17:53:50,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:53:50,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:50,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:53:50,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:53:50,163 INFO L87 Difference]: Start difference. First operand 253 states and 263 transitions. Second operand 16 states. [2020-10-14 17:53:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:50,866 INFO L93 Difference]: Finished difference Result 499 states and 526 transitions. [2020-10-14 17:53:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:53:50,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 247 [2020-10-14 17:53:50,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:50,869 INFO L225 Difference]: With dead ends: 499 [2020-10-14 17:53:50,869 INFO L226 Difference]: Without dead ends: 280 [2020-10-14 17:53:50,870 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 [2020-10-14 17:53:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-14 17:53:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 271. [2020-10-14 17:53:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-14 17:53:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 281 transitions. [2020-10-14 17:53:50,880 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 281 transitions. Word has length 247 [2020-10-14 17:53:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:50,880 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 281 transitions. [2020-10-14 17:53:50,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:53:50,880 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 281 transitions. [2020-10-14 17:53:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-14 17:53:50,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:50,887 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:50,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:53:50,887 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:50,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:50,888 INFO L82 PathProgramCache]: Analyzing trace with hash -499988676, now seen corresponding path program 13 times [2020-10-14 17:53:50,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:50,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960314890] [2020-10-14 17:53:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:50,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:50,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:50,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:56,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-14 17:53:56,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:53:56,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5244 [2020-10-14 17:53:56,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:56,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:53:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:53:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:53:56,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:56,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:56,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:56,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:56,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:56,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:56,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:56,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:56,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:56,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:56,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:56,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:56,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-14 17:53:56,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960314890] [2020-10-14 17:53:56,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:56,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:53:56,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561027983] [2020-10-14 17:53:56,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:53:56,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:56,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:53:56,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:53:56,375 INFO L87 Difference]: Start difference. First operand 271 states and 281 transitions. Second operand 17 states. [2020-10-14 17:53:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:57,059 INFO L93 Difference]: Finished difference Result 533 states and 560 transitions. [2020-10-14 17:53:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:53:57,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 265 [2020-10-14 17:53:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:57,063 INFO L225 Difference]: With dead ends: 533 [2020-10-14 17:53:57,063 INFO L226 Difference]: Without dead ends: 298 [2020-10-14 17:53:57,064 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 [2020-10-14 17:53:57,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-14 17:53:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 289. [2020-10-14 17:53:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 17:53:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 299 transitions. [2020-10-14 17:53:57,075 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 299 transitions. Word has length 265 [2020-10-14 17:53:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:57,075 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 299 transitions. [2020-10-14 17:53:57,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:53:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 299 transitions. [2020-10-14 17:53:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-14 17:53:57,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:57,077 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:57,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:53:57,078 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:57,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:57,078 INFO L82 PathProgramCache]: Analyzing trace with hash 912264074, now seen corresponding path program 14 times [2020-10-14 17:53:57,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:57,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326011233] [2020-10-14 17:53:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:57,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:57,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:57,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:57,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:57,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:57,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:02,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:02,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-14 17:54:02,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:02,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5247 [2020-10-14 17:54:02,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:02,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:02,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:54:02,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-14 17:54:02,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:54:02,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:02,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:02,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:02,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:02,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:02,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:02,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:02,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:02,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:02,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:02,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:02,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:02,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-14 17:54:02,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326011233] [2020-10-14 17:54:02,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:02,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:54:02,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391300081] [2020-10-14 17:54:02,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:54:02,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:02,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:54:02,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:54:02,606 INFO L87 Difference]: Start difference. First operand 289 states and 299 transitions. Second operand 18 states. [2020-10-14 17:54:03,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:03,288 INFO L93 Difference]: Finished difference Result 567 states and 594 transitions. [2020-10-14 17:54:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:54:03,288 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 283 [2020-10-14 17:54:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:03,291 INFO L225 Difference]: With dead ends: 567 [2020-10-14 17:54:03,291 INFO L226 Difference]: Without dead ends: 316 [2020-10-14 17:54:03,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:54:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-14 17:54:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 307. [2020-10-14 17:54:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-14 17:54:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 317 transitions. [2020-10-14 17:54:03,309 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 317 transitions. Word has length 283 [2020-10-14 17:54:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:03,309 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 317 transitions. [2020-10-14 17:54:03,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:54:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 317 transitions. [2020-10-14 17:54:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-14 17:54:03,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:03,311 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:03,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:54:03,312 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 549361752, now seen corresponding path program 15 times [2020-10-14 17:54:03,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:03,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126740504] [2020-10-14 17:54:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:03,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:08,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:08,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-14 17:54:08,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:08,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-14 17:54:08,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:08,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:08,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:54:08,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-14 17:54:08,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:54:08,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:08,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:08,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:08,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:08,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:08,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:08,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:08,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:08,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:08,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:08,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-14 17:54:08,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126740504] [2020-10-14 17:54:08,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:08,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:54:08,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458826691] [2020-10-14 17:54:08,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:54:08,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:08,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:54:08,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:54:08,794 INFO L87 Difference]: Start difference. First operand 307 states and 317 transitions. Second operand 19 states. [2020-10-14 17:54:09,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:09,604 INFO L93 Difference]: Finished difference Result 601 states and 628 transitions. [2020-10-14 17:54:09,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:54:09,605 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 301 [2020-10-14 17:54:09,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:09,607 INFO L225 Difference]: With dead ends: 601 [2020-10-14 17:54:09,608 INFO L226 Difference]: Without dead ends: 334 [2020-10-14 17:54:09,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:54:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-14 17:54:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 325. [2020-10-14 17:54:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-14 17:54:09,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 335 transitions. [2020-10-14 17:54:09,621 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 335 transitions. Word has length 301 [2020-10-14 17:54:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:09,622 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 335 transitions. [2020-10-14 17:54:09,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:54:09,622 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 335 transitions. [2020-10-14 17:54:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-14 17:54:09,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:09,624 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:09,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:54:09,624 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash 875384230, now seen corresponding path program 16 times [2020-10-14 17:54:09,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:09,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960984392] [2020-10-14 17:54:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:09,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:09,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:14,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:14,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-14 17:54:14,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:14,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-14 17:54:14,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:14,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:54:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-14 17:54:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:54:14,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:15,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:15,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:15,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:15,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:15,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:15,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:15,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:15,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:15,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:15,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:15,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:15,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-14 17:54:15,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960984392] [2020-10-14 17:54:15,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:15,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:54:15,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793566729] [2020-10-14 17:54:15,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:54:15,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:15,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:54:15,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:54:15,052 INFO L87 Difference]: Start difference. First operand 325 states and 335 transitions. Second operand 20 states. [2020-10-14 17:54:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:15,963 INFO L93 Difference]: Finished difference Result 635 states and 662 transitions. [2020-10-14 17:54:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:54:15,963 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 319 [2020-10-14 17:54:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:15,966 INFO L225 Difference]: With dead ends: 635 [2020-10-14 17:54:15,966 INFO L226 Difference]: Without dead ends: 352 [2020-10-14 17:54:15,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:54:15,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-14 17:54:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 343. [2020-10-14 17:54:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-14 17:54:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 353 transitions. [2020-10-14 17:54:15,988 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 353 transitions. Word has length 319 [2020-10-14 17:54:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:15,989 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 353 transitions. [2020-10-14 17:54:15,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:54:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 353 transitions. [2020-10-14 17:54:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-14 17:54:15,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:15,993 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:15,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:54:15,993 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:15,994 INFO L82 PathProgramCache]: Analyzing trace with hash -778892428, now seen corresponding path program 17 times [2020-10-14 17:54:15,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:15,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001923561] [2020-10-14 17:54:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:16,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:21,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:21,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-14 17:54:21,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:21,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5204 [2020-10-14 17:54:21,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:21,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:54:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-14 17:54:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:54:21,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:21,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:21,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:21,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:21,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:21,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:21,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:21,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:21,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:21,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:21,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:21,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:21,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-14 17:54:21,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001923561] [2020-10-14 17:54:21,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:21,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:54:21,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491805102] [2020-10-14 17:54:21,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:54:21,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:21,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:54:21,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:54:21,570 INFO L87 Difference]: Start difference. First operand 343 states and 353 transitions. Second operand 21 states. [2020-10-14 17:54:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:22,481 INFO L93 Difference]: Finished difference Result 669 states and 696 transitions. [2020-10-14 17:54:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:54:22,482 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 337 [2020-10-14 17:54:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:22,484 INFO L225 Difference]: With dead ends: 669 [2020-10-14 17:54:22,484 INFO L226 Difference]: Without dead ends: 370 [2020-10-14 17:54:22,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:54:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-14 17:54:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 361. [2020-10-14 17:54:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-14 17:54:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 371 transitions. [2020-10-14 17:54:22,500 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 371 transitions. Word has length 337 [2020-10-14 17:54:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:22,501 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 371 transitions. [2020-10-14 17:54:22,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:54:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 371 transitions. [2020-10-14 17:54:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-14 17:54:22,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:22,504 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:22,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:54:22,504 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:22,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:22,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1243696702, now seen corresponding path program 18 times [2020-10-14 17:54:22,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:22,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398645019] [2020-10-14 17:54:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:22,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:22,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:22,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:22,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:27,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:27,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 363 [2020-10-14 17:54:27,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:27,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-14 17:54:27,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:27,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:27,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:54:27,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 17:54:27,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:54:27,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:27,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:27,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:27,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:27,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:27,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:27,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:27,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:27,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:27,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:27,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-14 17:54:27,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398645019] [2020-10-14 17:54:27,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:27,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:54:27,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372613117] [2020-10-14 17:54:27,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:54:27,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:27,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:54:27,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:54:27,925 INFO L87 Difference]: Start difference. First operand 361 states and 371 transitions. Second operand 22 states. [2020-10-14 17:54:28,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:28,945 INFO L93 Difference]: Finished difference Result 703 states and 730 transitions. [2020-10-14 17:54:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:54:28,946 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 355 [2020-10-14 17:54:28,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:28,948 INFO L225 Difference]: With dead ends: 703 [2020-10-14 17:54:28,948 INFO L226 Difference]: Without dead ends: 388 [2020-10-14 17:54:28,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:54:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-14 17:54:28,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 379. [2020-10-14 17:54:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-14 17:54:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 389 transitions. [2020-10-14 17:54:28,972 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 389 transitions. Word has length 355 [2020-10-14 17:54:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:28,972 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 389 transitions. [2020-10-14 17:54:28,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:54:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 389 transitions. [2020-10-14 17:54:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-10-14 17:54:28,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:28,975 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:28,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:54:28,975 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:28,976 INFO L82 PathProgramCache]: Analyzing trace with hash 134684816, now seen corresponding path program 19 times [2020-10-14 17:54:28,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:28,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274359389] [2020-10-14 17:54:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:29,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:34,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:34,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 381 [2020-10-14 17:54:34,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:34,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-14 17:54:34,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:34,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:54:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 17:54:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:54:34,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:34,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:34,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:34,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:34,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:34,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:34,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:34,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:34,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:34,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2020-10-14 17:54:34,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274359389] [2020-10-14 17:54:34,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:34,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:54:34,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230905666] [2020-10-14 17:54:34,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:54:34,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:34,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:54:34,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:54:34,590 INFO L87 Difference]: Start difference. First operand 379 states and 389 transitions. Second operand 23 states. [2020-10-14 17:54:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:35,644 INFO L93 Difference]: Finished difference Result 737 states and 764 transitions. [2020-10-14 17:54:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:54:35,645 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 373 [2020-10-14 17:54:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:35,647 INFO L225 Difference]: With dead ends: 737 [2020-10-14 17:54:35,647 INFO L226 Difference]: Without dead ends: 406 [2020-10-14 17:54:35,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:54:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-14 17:54:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 397. [2020-10-14 17:54:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-14 17:54:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 407 transitions. [2020-10-14 17:54:35,661 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 407 transitions. Word has length 373 [2020-10-14 17:54:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:35,661 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 407 transitions. [2020-10-14 17:54:35,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:54:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 407 transitions. [2020-10-14 17:54:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-14 17:54:35,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:35,664 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:35,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:54:35,664 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:35,664 INFO L82 PathProgramCache]: Analyzing trace with hash -418695202, now seen corresponding path program 20 times [2020-10-14 17:54:35,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:35,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630521254] [2020-10-14 17:54:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:35,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:35,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:36,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:41,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:41,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 399 [2020-10-14 17:54:41,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:41,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5326 [2020-10-14 17:54:41,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:41,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:54:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-14 17:54:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:54:41,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:41,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:41,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:41,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:41,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:41,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:41,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:41,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:41,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:41,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:41,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2020-10-14 17:54:41,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630521254] [2020-10-14 17:54:41,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:41,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:54:41,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364333333] [2020-10-14 17:54:41,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:54:41,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:41,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:54:41,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:54:41,644 INFO L87 Difference]: Start difference. First operand 397 states and 407 transitions. Second operand 24 states. [2020-10-14 17:54:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:42,610 INFO L93 Difference]: Finished difference Result 771 states and 798 transitions. [2020-10-14 17:54:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:54:42,611 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 391 [2020-10-14 17:54:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:42,616 INFO L225 Difference]: With dead ends: 771 [2020-10-14 17:54:42,616 INFO L226 Difference]: Without dead ends: 424 [2020-10-14 17:54:42,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:54:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-14 17:54:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 415. [2020-10-14 17:54:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-10-14 17:54:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 425 transitions. [2020-10-14 17:54:42,630 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 425 transitions. Word has length 391 [2020-10-14 17:54:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:42,630 INFO L479 AbstractCegarLoop]: Abstraction has 415 states and 425 transitions. [2020-10-14 17:54:42,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:54:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 425 transitions. [2020-10-14 17:54:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-10-14 17:54:42,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:42,633 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:42,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:54:42,633 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:42,634 INFO L82 PathProgramCache]: Analyzing trace with hash 2012338092, now seen corresponding path program 21 times [2020-10-14 17:54:42,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:42,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099143028] [2020-10-14 17:54:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:42,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:48,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:48,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-10-14 17:54:48,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:48,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5432 [2020-10-14 17:54:48,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:48,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:54:48,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-14 17:54:48,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:54:48,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:48,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:48,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:48,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:48,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:48,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:48,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:48,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:48,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:48,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:48,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:48,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:48,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2020-10-14 17:54:48,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099143028] [2020-10-14 17:54:48,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:48,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:54:48,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973794618] [2020-10-14 17:54:48,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:54:48,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:48,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:54:48,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:54:48,586 INFO L87 Difference]: Start difference. First operand 415 states and 425 transitions. Second operand 25 states. [2020-10-14 17:54:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:49,609 INFO L93 Difference]: Finished difference Result 805 states and 832 transitions. [2020-10-14 17:54:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:54:49,612 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 409 [2020-10-14 17:54:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:49,614 INFO L225 Difference]: With dead ends: 805 [2020-10-14 17:54:49,614 INFO L226 Difference]: Without dead ends: 442 [2020-10-14 17:54:49,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:54:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-14 17:54:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 433. [2020-10-14 17:54:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-10-14 17:54:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 443 transitions. [2020-10-14 17:54:49,627 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 443 transitions. Word has length 409 [2020-10-14 17:54:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:49,627 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 443 transitions. [2020-10-14 17:54:49,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:54:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 443 transitions. [2020-10-14 17:54:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2020-10-14 17:54:49,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:49,630 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:49,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:54:49,630 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:49,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:49,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1942609914, now seen corresponding path program 22 times [2020-10-14 17:54:49,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:49,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409278846] [2020-10-14 17:54:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:49,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:49,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:49,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:49,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:49,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:54,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:54,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 435 [2020-10-14 17:54:54,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:54:54,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5245 [2020-10-14 17:54:54,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:54,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:54:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-14 17:54:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:54:54,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:55,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:55,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:55,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:55,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:55,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:55,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:55,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:55,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:55,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2020-10-14 17:54:55,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409278846] [2020-10-14 17:54:55,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:55,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:54:55,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352956326] [2020-10-14 17:54:55,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:54:55,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:55,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:54:55,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:54:55,371 INFO L87 Difference]: Start difference. First operand 433 states and 443 transitions. Second operand 26 states. [2020-10-14 17:54:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:56,380 INFO L93 Difference]: Finished difference Result 839 states and 866 transitions. [2020-10-14 17:54:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:54:56,381 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 427 [2020-10-14 17:54:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:56,384 INFO L225 Difference]: With dead ends: 839 [2020-10-14 17:54:56,385 INFO L226 Difference]: Without dead ends: 460 [2020-10-14 17:54:56,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:54:56,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-14 17:54:56,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2020-10-14 17:54:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-14 17:54:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 461 transitions. [2020-10-14 17:54:56,396 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 461 transitions. Word has length 427 [2020-10-14 17:54:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:56,396 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 461 transitions. [2020-10-14 17:54:56,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:54:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 461 transitions. [2020-10-14 17:54:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-10-14 17:54:56,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:56,399 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:56,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:54:56,400 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:56,400 INFO L82 PathProgramCache]: Analyzing trace with hash 900346056, now seen corresponding path program 23 times [2020-10-14 17:54:56,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:56,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980781903] [2020-10-14 17:54:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:56,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:56,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:56,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:56,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:56,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:56,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:01,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:01,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 453 [2020-10-14 17:55:01,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:01,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5169 [2020-10-14 17:55:01,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:01,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 17:55:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-14 17:55:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:55:01,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:02,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:02,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:02,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:02,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:02,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:02,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:02,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:02,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:02,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:02,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:02,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:02,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2020-10-14 17:55:02,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980781903] [2020-10-14 17:55:02,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:02,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:55:02,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639486196] [2020-10-14 17:55:02,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:55:02,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:55:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:55:02,106 INFO L87 Difference]: Start difference. First operand 451 states and 461 transitions. Second operand 27 states. [2020-10-14 17:55:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:03,319 INFO L93 Difference]: Finished difference Result 873 states and 900 transitions. [2020-10-14 17:55:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:55:03,320 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 445 [2020-10-14 17:55:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:03,322 INFO L225 Difference]: With dead ends: 873 [2020-10-14 17:55:03,322 INFO L226 Difference]: Without dead ends: 478 [2020-10-14 17:55:03,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:55:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-14 17:55:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 469. [2020-10-14 17:55:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-14 17:55:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 479 transitions. [2020-10-14 17:55:03,334 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 479 transitions. Word has length 445 [2020-10-14 17:55:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:03,335 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 479 transitions. [2020-10-14 17:55:03,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:55:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 479 transitions. [2020-10-14 17:55:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-10-14 17:55:03,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:03,338 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:03,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:55:03,339 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1219602966, now seen corresponding path program 24 times [2020-10-14 17:55:03,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:03,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129573996] [2020-10-14 17:55:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:03,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:03,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:03,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:03,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:03,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:03,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:08,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:08,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 471 [2020-10-14 17:55:08,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:08,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-14 17:55:08,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:08,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:08,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:55:08,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-14 17:55:08,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:55:08,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:08,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:08,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:08,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:08,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:08,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:08,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:08,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:08,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:08,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:08,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:08,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:08,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2020-10-14 17:55:09,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129573996] [2020-10-14 17:55:09,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:09,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:55:09,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259491859] [2020-10-14 17:55:09,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:55:09,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:09,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:55:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:55:09,006 INFO L87 Difference]: Start difference. First operand 469 states and 479 transitions. Second operand 28 states. [2020-10-14 17:55:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:10,262 INFO L93 Difference]: Finished difference Result 907 states and 934 transitions. [2020-10-14 17:55:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:55:10,262 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 463 [2020-10-14 17:55:10,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:10,264 INFO L225 Difference]: With dead ends: 907 [2020-10-14 17:55:10,265 INFO L226 Difference]: Without dead ends: 496 [2020-10-14 17:55:10,266 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 [2020-10-14 17:55:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-10-14 17:55:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 487. [2020-10-14 17:55:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-10-14 17:55:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 497 transitions. [2020-10-14 17:55:10,277 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 497 transitions. Word has length 463 [2020-10-14 17:55:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:10,277 INFO L479 AbstractCegarLoop]: Abstraction has 487 states and 497 transitions. [2020-10-14 17:55:10,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:55:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 497 transitions. [2020-10-14 17:55:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-10-14 17:55:10,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:10,281 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:10,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:55:10,282 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:10,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:10,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1980181476, now seen corresponding path program 25 times [2020-10-14 17:55:10,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:10,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244035779] [2020-10-14 17:55:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:10,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:10,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:10,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:10,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:10,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:10,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:15,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:15,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 489 [2020-10-14 17:55:15,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:15,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-14 17:55:15,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:15,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:15,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 17:55:15,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-14 17:55:15,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:55:15,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:15,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:15,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:15,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:15,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:15,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:15,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:15,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:15,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:15,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:15,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:15,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:15,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2020-10-14 17:55:15,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244035779] [2020-10-14 17:55:15,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:15,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:55:15,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270101013] [2020-10-14 17:55:15,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:55:15,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:15,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:55:15,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:55:15,914 INFO L87 Difference]: Start difference. First operand 487 states and 497 transitions. Second operand 29 states. [2020-10-14 17:55:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:17,252 INFO L93 Difference]: Finished difference Result 941 states and 968 transitions. [2020-10-14 17:55:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:55:17,253 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 481 [2020-10-14 17:55:17,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:17,256 INFO L225 Difference]: With dead ends: 941 [2020-10-14 17:55:17,256 INFO L226 Difference]: Without dead ends: 514 [2020-10-14 17:55:17,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:55:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-10-14 17:55:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 505. [2020-10-14 17:55:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-14 17:55:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 515 transitions. [2020-10-14 17:55:17,269 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 515 transitions. Word has length 481 [2020-10-14 17:55:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:17,269 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 515 transitions. [2020-10-14 17:55:17,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:55:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 515 transitions. [2020-10-14 17:55:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-14 17:55:17,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:17,273 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:17,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:55:17,274 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:17,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1389991474, now seen corresponding path program 26 times [2020-10-14 17:55:17,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:17,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545668655] [2020-10-14 17:55:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:22,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:22,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 507 [2020-10-14 17:55:22,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:22,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5408 [2020-10-14 17:55:22,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:22,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:22,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:55:22,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 17:55:22,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:55:22,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:23,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:23,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:23,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:23,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:23,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:23,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:23,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:23,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:23,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:23,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:23,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:23,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2020-10-14 17:55:23,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545668655] [2020-10-14 17:55:23,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:23,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:55:23,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686349574] [2020-10-14 17:55:23,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:55:23,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:23,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:55:23,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:55:23,338 INFO L87 Difference]: Start difference. First operand 505 states and 515 transitions. Second operand 30 states. [2020-10-14 17:55:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:24,717 INFO L93 Difference]: Finished difference Result 975 states and 1002 transitions. [2020-10-14 17:55:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:55:24,718 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 499 [2020-10-14 17:55:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:24,720 INFO L225 Difference]: With dead ends: 975 [2020-10-14 17:55:24,720 INFO L226 Difference]: Without dead ends: 532 [2020-10-14 17:55:24,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:55:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-14 17:55:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 523. [2020-10-14 17:55:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-10-14 17:55:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 533 transitions. [2020-10-14 17:55:24,735 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 533 transitions. Word has length 499 [2020-10-14 17:55:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:24,735 INFO L479 AbstractCegarLoop]: Abstraction has 523 states and 533 transitions. [2020-10-14 17:55:24,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:55:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 533 transitions. [2020-10-14 17:55:24,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2020-10-14 17:55:24,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:24,739 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:24,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:55:24,740 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:24,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:24,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1314900224, now seen corresponding path program 27 times [2020-10-14 17:55:24,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:24,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379994328] [2020-10-14 17:55:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:24,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:24,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:24,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:24,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:25,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:25,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:29,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:29,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 525 [2020-10-14 17:55:29,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:29,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5198 [2020-10-14 17:55:29,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:29,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:29,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 17:55:29,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 17:55:29,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:55:29,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:30,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:30,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:30,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:30,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:30,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:30,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:30,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:30,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:30,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:30,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:30,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:30,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2020-10-14 17:55:30,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379994328] [2020-10-14 17:55:30,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:30,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:55:30,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050959093] [2020-10-14 17:55:30,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:55:30,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:30,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:55:30,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:55:30,664 INFO L87 Difference]: Start difference. First operand 523 states and 533 transitions. Second operand 31 states. [2020-10-14 17:55:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:31,962 INFO L93 Difference]: Finished difference Result 1009 states and 1036 transitions. [2020-10-14 17:55:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:55:31,963 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 517 [2020-10-14 17:55:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:31,966 INFO L225 Difference]: With dead ends: 1009 [2020-10-14 17:55:31,966 INFO L226 Difference]: Without dead ends: 550 [2020-10-14 17:55:31,968 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 [2020-10-14 17:55:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-10-14 17:55:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 541. [2020-10-14 17:55:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-10-14 17:55:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 551 transitions. [2020-10-14 17:55:31,980 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 551 transitions. Word has length 517 [2020-10-14 17:55:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:31,980 INFO L479 AbstractCegarLoop]: Abstraction has 541 states and 551 transitions. [2020-10-14 17:55:31,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:55:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 551 transitions. [2020-10-14 17:55:31,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2020-10-14 17:55:31,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:31,984 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:31,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:55:31,985 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:31,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1071162446, now seen corresponding path program 28 times [2020-10-14 17:55:31,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:31,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998598428] [2020-10-14 17:55:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:32,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:32,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:32,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:32,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:32,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:32,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:38,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:38,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 543 [2020-10-14 17:55:38,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:38,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6095 [2020-10-14 17:55:38,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:38,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:55:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 245 [2020-10-14 17:55:38,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:55:38,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:38,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:38,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:38,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:38,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:38,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:38,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:38,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:38,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2020-10-14 17:55:38,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998598428] [2020-10-14 17:55:38,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:38,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:55:38,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019908749] [2020-10-14 17:55:38,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:55:38,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:38,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:55:38,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:55:38,881 INFO L87 Difference]: Start difference. First operand 541 states and 551 transitions. Second operand 32 states. [2020-10-14 17:55:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:40,392 INFO L93 Difference]: Finished difference Result 1043 states and 1070 transitions. [2020-10-14 17:55:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:55:40,394 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 535 [2020-10-14 17:55:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:40,397 INFO L225 Difference]: With dead ends: 1043 [2020-10-14 17:55:40,397 INFO L226 Difference]: Without dead ends: 568 [2020-10-14 17:55:40,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:55:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-14 17:55:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 559. [2020-10-14 17:55:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-10-14 17:55:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 569 transitions. [2020-10-14 17:55:40,410 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 569 transitions. Word has length 535 [2020-10-14 17:55:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:40,411 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 569 transitions. [2020-10-14 17:55:40,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:55:40,411 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 569 transitions. [2020-10-14 17:55:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2020-10-14 17:55:40,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:40,415 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:40,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:55:40,415 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:40,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1955268636, now seen corresponding path program 29 times [2020-10-14 17:55:40,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:40,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30405261] [2020-10-14 17:55:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:40,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:40,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:54,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:54,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 561 [2020-10-14 17:55:54,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:55:54,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14038 [2020-10-14 17:55:54,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:54,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:54,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 17:55:54,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-14 17:55:54,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:55:54,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:55,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:55,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:55,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:55,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:55,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:55,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:55,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:55,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2020-10-14 17:55:55,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30405261] [2020-10-14 17:55:55,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:55,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:55:55,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251940549] [2020-10-14 17:55:55,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:55:55,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:55,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:55:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:55:55,240 INFO L87 Difference]: Start difference. First operand 559 states and 569 transitions. Second operand 33 states. [2020-10-14 17:55:56,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:56,838 INFO L93 Difference]: Finished difference Result 1077 states and 1104 transitions. [2020-10-14 17:55:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:55:56,839 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 553 [2020-10-14 17:55:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:56,842 INFO L225 Difference]: With dead ends: 1077 [2020-10-14 17:55:56,843 INFO L226 Difference]: Without dead ends: 586 [2020-10-14 17:55:56,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:55:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-10-14 17:55:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 577. [2020-10-14 17:55:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-10-14 17:55:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 587 transitions. [2020-10-14 17:55:56,857 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 587 transitions. Word has length 553 [2020-10-14 17:55:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:56,857 INFO L479 AbstractCegarLoop]: Abstraction has 577 states and 587 transitions. [2020-10-14 17:55:56,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:55:56,857 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 587 transitions. [2020-10-14 17:55:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2020-10-14 17:55:56,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:56,862 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:56,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:55:56,862 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:56,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1036375146, now seen corresponding path program 30 times [2020-10-14 17:55:56,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:56,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042805971] [2020-10-14 17:55:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:56,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:56,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:57,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:02,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:02,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 579 [2020-10-14 17:56:02,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:02,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5682 [2020-10-14 17:56:02,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:02,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:56:02,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-14 17:56:02,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:56:02,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:03,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:03,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:03,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:03,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:03,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:03,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:03,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:03,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:03,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2020-10-14 17:56:03,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042805971] [2020-10-14 17:56:03,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:03,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:56:03,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025269752] [2020-10-14 17:56:03,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:56:03,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:03,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:56:03,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:56:03,375 INFO L87 Difference]: Start difference. First operand 577 states and 587 transitions. Second operand 34 states. [2020-10-14 17:56:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:05,074 INFO L93 Difference]: Finished difference Result 1111 states and 1138 transitions. [2020-10-14 17:56:05,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:56:05,074 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 571 [2020-10-14 17:56:05,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:05,078 INFO L225 Difference]: With dead ends: 1111 [2020-10-14 17:56:05,078 INFO L226 Difference]: Without dead ends: 604 [2020-10-14 17:56:05,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:56:05,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-10-14 17:56:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 595. [2020-10-14 17:56:05,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-14 17:56:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 605 transitions. [2020-10-14 17:56:05,091 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 605 transitions. Word has length 571 [2020-10-14 17:56:05,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:05,091 INFO L479 AbstractCegarLoop]: Abstraction has 595 states and 605 transitions. [2020-10-14 17:56:05,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:56:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 605 transitions. [2020-10-14 17:56:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2020-10-14 17:56:05,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:05,096 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:05,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:56:05,097 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:05,097 INFO L82 PathProgramCache]: Analyzing trace with hash -18880200, now seen corresponding path program 31 times [2020-10-14 17:56:05,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:05,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777889588] [2020-10-14 17:56:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:05,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:05,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:05,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:05,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:05,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:11,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:11,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 597 [2020-10-14 17:56:11,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:11,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6143 [2020-10-14 17:56:11,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:11,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:11,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 17:56:11,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-14 17:56:11,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 17:56:11,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:11,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:11,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:11,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:11,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:11,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:11,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:11,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:11,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:11,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2020-10-14 17:56:12,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777889588] [2020-10-14 17:56:12,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:12,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:56:12,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756151506] [2020-10-14 17:56:12,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:56:12,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:12,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:56:12,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:56:12,122 INFO L87 Difference]: Start difference. First operand 595 states and 605 transitions. Second operand 35 states. [2020-10-14 17:56:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:13,785 INFO L93 Difference]: Finished difference Result 1145 states and 1172 transitions. [2020-10-14 17:56:13,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:56:13,786 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 589 [2020-10-14 17:56:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:13,789 INFO L225 Difference]: With dead ends: 1145 [2020-10-14 17:56:13,789 INFO L226 Difference]: Without dead ends: 622 [2020-10-14 17:56:13,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:56:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-10-14 17:56:13,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 613. [2020-10-14 17:56:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-10-14 17:56:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 623 transitions. [2020-10-14 17:56:13,804 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 623 transitions. Word has length 589 [2020-10-14 17:56:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:13,804 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 623 transitions. [2020-10-14 17:56:13,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:56:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 623 transitions. [2020-10-14 17:56:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2020-10-14 17:56:13,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:13,809 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:13,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:56:13,809 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:13,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1153948026, now seen corresponding path program 32 times [2020-10-14 17:56:13,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:13,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039407298] [2020-10-14 17:56:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:13,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:13,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:13,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:14,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:14,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:14,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:19,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:19,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 615 [2020-10-14 17:56:19,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:19,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5270 [2020-10-14 17:56:19,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:19,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:19,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:56:19,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:56:19,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:56:19,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:19,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:19,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:19,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:19,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:19,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:19,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:19,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:19,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:19,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2020-10-14 17:56:20,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039407298] [2020-10-14 17:56:20,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:20,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:56:20,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103118461] [2020-10-14 17:56:20,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:56:20,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:20,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:56:20,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:56:20,008 INFO L87 Difference]: Start difference. First operand 613 states and 623 transitions. Second operand 36 states. [2020-10-14 17:56:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:21,627 INFO L93 Difference]: Finished difference Result 1179 states and 1206 transitions. [2020-10-14 17:56:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:56:21,628 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 607 [2020-10-14 17:56:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:21,631 INFO L225 Difference]: With dead ends: 1179 [2020-10-14 17:56:21,631 INFO L226 Difference]: Without dead ends: 640 [2020-10-14 17:56:21,634 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 [2020-10-14 17:56:21,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-14 17:56:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 631. [2020-10-14 17:56:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-10-14 17:56:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 641 transitions. [2020-10-14 17:56:21,645 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 641 transitions. Word has length 607 [2020-10-14 17:56:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:21,646 INFO L479 AbstractCegarLoop]: Abstraction has 631 states and 641 transitions. [2020-10-14 17:56:21,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:56:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 641 transitions. [2020-10-14 17:56:21,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2020-10-14 17:56:21,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:21,651 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:21,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:56:21,651 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:21,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:21,652 INFO L82 PathProgramCache]: Analyzing trace with hash 607480916, now seen corresponding path program 33 times [2020-10-14 17:56:21,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:21,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092491394] [2020-10-14 17:56:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:21,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:21,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:21,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:22,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:22,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:28,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:28,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 633 [2020-10-14 17:56:28,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:28,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7132 [2020-10-14 17:56:28,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:28,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:28,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 17:56:28,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:56:28,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 17:56:28,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:29,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:29,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:29,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:29,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:29,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:29,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:29,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:29,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:29,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2020-10-14 17:56:29,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092491394] [2020-10-14 17:56:29,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:29,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:56:29,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284370257] [2020-10-14 17:56:29,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:56:29,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:29,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:56:29,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:56:29,760 INFO L87 Difference]: Start difference. First operand 631 states and 641 transitions. Second operand 37 states. [2020-10-14 17:56:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:56:31,678 INFO L93 Difference]: Finished difference Result 1213 states and 1240 transitions. [2020-10-14 17:56:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:56:31,679 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 625 [2020-10-14 17:56:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:56:31,683 INFO L225 Difference]: With dead ends: 1213 [2020-10-14 17:56:31,683 INFO L226 Difference]: Without dead ends: 658 [2020-10-14 17:56:31,685 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 [2020-10-14 17:56:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-14 17:56:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 649. [2020-10-14 17:56:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-10-14 17:56:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 659 transitions. [2020-10-14 17:56:31,698 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 659 transitions. Word has length 625 [2020-10-14 17:56:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:56:31,698 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 659 transitions. [2020-10-14 17:56:31,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:56:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 659 transitions. [2020-10-14 17:56:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2020-10-14 17:56:31,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:56:31,704 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:56:31,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:56:31,704 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:56:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:56:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash 658938530, now seen corresponding path program 34 times [2020-10-14 17:56:31,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:56:31,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85067987] [2020-10-14 17:56:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:56:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:31,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:31,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:31,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:32,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:32,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:32,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:36,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:36,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 651 [2020-10-14 17:56:36,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:56:36,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-14 17:56:36,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:36,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:36,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:56:36,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 293 [2020-10-14 17:56:36,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 17:56:36,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:37,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:56:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:56:37,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:56:37,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:56:37,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:56:37,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:56:37,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:56:37,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:56:37,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:56:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:56:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:56:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:56:37,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:56:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2020-10-14 17:56:37,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85067987] [2020-10-14 17:56:37,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:56:37,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 17:56:37,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654115874] [2020-10-14 17:56:37,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 17:56:37,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:56:37,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 17:56:37,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:56:37,859 INFO L87 Difference]: Start difference. First operand 649 states and 659 transitions. Second operand 38 states.