/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:34:37,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:34:37,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:34:37,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:34:37,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:34:37,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:34:37,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:34:37,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:34:37,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:34:37,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:34:37,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:34:37,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:34:37,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:34:37,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:34:37,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:34:37,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:34:37,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:34:37,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:34:37,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:34:37,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:34:37,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:34:37,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:34:37,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:34:37,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:34:37,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:34:37,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:34:37,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:34:37,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:34:37,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:34:37,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:34:37,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:34:37,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:34:37,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:34:37,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:34:37,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:34:37,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:34:37,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:34:37,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:34:37,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:34:37,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:34:37,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:34:37,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:34:37,697 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:34:37,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:34:37,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:34:37,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:34:37,699 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:34:37,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:34:37,699 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:34:37,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:34:37,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:34:37,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:34:37,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:34:37,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:34:37,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:34:37,702 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:34:37,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:34:37,703 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:34:37,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:34:37,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:34:37,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:34:37,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:34:37,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:34:37,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:34:37,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:34:37,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:34:37,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:34:37,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:34:37,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:34:37,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:34:37,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:34:37,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:34:38,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:34:38,025 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:34:38,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:34:38,032 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:34:38,032 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:34:38,033 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2020-10-13 23:34:38,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a826553/aef88708f9b44f78947c80537096ffb2/FLAG337da20f9 [2020-10-13 23:34:38,461 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:34:38,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2020-10-13 23:34:38,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a826553/aef88708f9b44f78947c80537096ffb2/FLAG337da20f9 [2020-10-13 23:34:38,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a826553/aef88708f9b44f78947c80537096ffb2 [2020-10-13 23:34:38,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:34:38,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:34:38,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:34:38,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:34:38,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:34:38,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:34:38" (1/1) ... [2020-10-13 23:34:38,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf2a9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:38, skipping insertion in model container [2020-10-13 23:34:38,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:34:38" (1/1) ... [2020-10-13 23:34:38,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:34:38,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:34:39,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:34:39,058 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:34:39,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:34:39,102 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:34:39,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:39 WrapperNode [2020-10-13 23:34:39,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:34:39,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:34:39,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:34:39,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:34:39,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:39" (1/1) ... [2020-10-13 23:34:39,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:39" (1/1) ... [2020-10-13 23:34:39,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:39" (1/1) ... [2020-10-13 23:34:39,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:39" (1/1) ... [2020-10-13 23:34:39,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:39" (1/1) ... [2020-10-13 23:34:39,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:39" (1/1) ... [2020-10-13 23:34:39,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:39" (1/1) ... [2020-10-13 23:34:39,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:34:39,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:34:39,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:34:39,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:34:39,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:34:39,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:34:39,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:34:39,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:34:39,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:34:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:34:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:34:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:34:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:34:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:34:39,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:34:39,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:34:39,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:34:39,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:34:39,527 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:34:39,528 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:34:39,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:34:39 BoogieIcfgContainer [2020-10-13 23:34:39,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:34:39,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:34:39,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:34:39,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:34:39,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:34:38" (1/3) ... [2020-10-13 23:34:39,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d9d6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:34:39, skipping insertion in model container [2020-10-13 23:34:39,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:39" (2/3) ... [2020-10-13 23:34:39,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d9d6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:34:39, skipping insertion in model container [2020-10-13 23:34:39,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:34:39" (3/3) ... [2020-10-13 23:34:39,539 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-1.i [2020-10-13 23:34:39,549 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:34:39,556 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:34:39,571 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:34:39,596 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:34:39,597 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:34:39,597 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:34:39,597 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:34:39,597 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:34:39,597 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:34:39,597 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:34:39,598 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:34:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 23:34:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:34:39,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:39,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:39,629 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash 578824766, now seen corresponding path program 1 times [2020-10-13 23:34:39,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:39,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890595004] [2020-10-13 23:34:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:39,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:39,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:39,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:40,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:34:40,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:40,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-13 23:34:40,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:40,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:40,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:40,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:34:40,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:40,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:34:40,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:40,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:40,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:40,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:40,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:34:40,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:40,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:40,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:40,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:40,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 23:34:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:40,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890595004] [2020-10-13 23:34:40,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:34:40,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:34:40,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073982959] [2020-10-13 23:34:40,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:34:40,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:40,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:34:40,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:34:40,216 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-13 23:34:40,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:40,299 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-10-13 23:34:40,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:34:40,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 23:34:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:40,309 INFO L225 Difference]: With dead ends: 47 [2020-10-13 23:34:40,310 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 23:34:40,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:34:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 23:34:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 23:34:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 23:34:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 23:34:40,351 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2020-10-13 23:34:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:40,351 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 23:34:40,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:34:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 23:34:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:34:40,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:40,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:40,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:34:40,353 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:40,354 INFO L82 PathProgramCache]: Analyzing trace with hash -823304390, now seen corresponding path program 1 times [2020-10-13 23:34:40,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:40,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938991282] [2020-10-13 23:34:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:40,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:40,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:34:40,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:40,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-13 23:34:40,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:40,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:40,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:34:40,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 23:34:40,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:34:40,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:40,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:40,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:40,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:40,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:40,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:34:40,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:40,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:40,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:40,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:40,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:40,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:40,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938991282] [2020-10-13 23:34:40,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:34:40,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:34:40,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604637952] [2020-10-13 23:34:40,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:34:40,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:40,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:34:40,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:34:40,678 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-13 23:34:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:40,741 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-13 23:34:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:34:40,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 23:34:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:40,742 INFO L225 Difference]: With dead ends: 40 [2020-10-13 23:34:40,743 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 23:34:40,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:34:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 23:34:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 23:34:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:34:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 23:34:40,751 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-13 23:34:40,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:40,752 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 23:34:40,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:34:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 23:34:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:34:40,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:40,753 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] [2020-10-13 23:34:40,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:34:40,754 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:40,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:40,754 INFO L82 PathProgramCache]: Analyzing trace with hash 3753729, now seen corresponding path program 1 times [2020-10-13 23:34:40,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:40,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765063499] [2020-10-13 23:34:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:40,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:41,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:34:41,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:41,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-13 23:34:41,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:41,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:34:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:34:41,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:34:41,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:41,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:41,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:41,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:41,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:41,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:41,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:41,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:41,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:41,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:41,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:41,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:34:41,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765063499] [2020-10-13 23:34:41,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:41,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:34:41,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852411750] [2020-10-13 23:34:41,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:34:41,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:41,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:34:41,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:34:41,396 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-13 23:34:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:41,470 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-13 23:34:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:34:41,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 23:34:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:41,472 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:34:41,472 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:34:41,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:34:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:34:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 23:34:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:34:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 23:34:41,480 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2020-10-13 23:34:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:41,481 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 23:34:41,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:34:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 23:34:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:34:41,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:41,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:41,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:34:41,483 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1185149478, now seen corresponding path program 2 times [2020-10-13 23:34:41,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:41,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281304152] [2020-10-13 23:34:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:41,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:42,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:34:42,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:42,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-13 23:34:42,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:42,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:42,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:34:42,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:34:42,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:34:42,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:42,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:42,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:42,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:42,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:42,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:42,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:42,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:42,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:42,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:42,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:42,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:34:42,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281304152] [2020-10-13 23:34:42,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:42,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:34:42,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434286735] [2020-10-13 23:34:42,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:34:42,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:42,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:34:42,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:34:42,481 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2020-10-13 23:34:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:42,567 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-13 23:34:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:34:42,567 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 23:34:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:42,568 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:34:42,568 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:34:42,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:34:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:34:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 23:34:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:34:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-13 23:34:42,579 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-13 23:34:42,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:42,580 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-13 23:34:42,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:34:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-13 23:34:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:34:42,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:42,582 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:42,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:34:42,582 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:42,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:42,583 INFO L82 PathProgramCache]: Analyzing trace with hash 455820257, now seen corresponding path program 3 times [2020-10-13 23:34:42,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:42,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887192556] [2020-10-13 23:34:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:42,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:44,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:34:44,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:44,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2080 [2020-10-13 23:34:44,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:44,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:44,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:34:44,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:44,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:34:44,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:44,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:44,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:44,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:44,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:44,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:34:44,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:44,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:44,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:44,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:44,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:44,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:34:44,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887192556] [2020-10-13 23:34:44,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:44,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:34:44,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462459730] [2020-10-13 23:34:44,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:34:44,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:44,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:34:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:34:44,750 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2020-10-13 23:34:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:44,861 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-13 23:34:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:34:44,862 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 23:34:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:44,864 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:34:44,864 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:34:44,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:34:44,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:34:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 23:34:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:34:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 23:34:44,872 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2020-10-13 23:34:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:44,873 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 23:34:44,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:34:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 23:34:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:34:44,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:44,875 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:44,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:34:44,875 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:44,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1002382458, now seen corresponding path program 4 times [2020-10-13 23:34:44,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:44,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402886010] [2020-10-13 23:34:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:44,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:44,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:46,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:48,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:48,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:34:48,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:48,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3488 [2020-10-13 23:34:48,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:48,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:48,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:34:48,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:34:48,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:34:48,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:48,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:48,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:48,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:48,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:48,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:48,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:48,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:48,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:48,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:48,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:48,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:48,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 23:34:48,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402886010] [2020-10-13 23:34:48,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:48,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:34:48,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668165840] [2020-10-13 23:34:48,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:34:48,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:48,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:34:48,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:34:48,444 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2020-10-13 23:34:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:48,536 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-13 23:34:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:34:48,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-13 23:34:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:48,538 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:34:48,538 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:34:48,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:34:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:34:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 23:34:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:34:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 23:34:48,545 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 29 [2020-10-13 23:34:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:48,545 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 23:34:48,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:34:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 23:34:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:34:48,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:48,546 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:48,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:34:48,547 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:48,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:48,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1395779391, now seen corresponding path program 5 times [2020-10-13 23:34:48,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:48,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176909633] [2020-10-13 23:34:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:48,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:48,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:48,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:51,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:53,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:53,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:34:53,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:53,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4773 [2020-10-13 23:34:53,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:53,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:34:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:34:53,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:34:53,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:53,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:53,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:53,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:53,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:53,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:53,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:53,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:53,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:53,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:53,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:53,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:53,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:34:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 23:34:53,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176909633] [2020-10-13 23:34:53,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:53,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:34:53,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867192938] [2020-10-13 23:34:53,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:34:53,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:34:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:34:53,406 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 9 states. [2020-10-13 23:34:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:53,526 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-13 23:34:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:34:53,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-13 23:34:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:53,527 INFO L225 Difference]: With dead ends: 65 [2020-10-13 23:34:53,527 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:34:53,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:34:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:34:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 23:34:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:34:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-13 23:34:53,542 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2020-10-13 23:34:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:53,543 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-13 23:34:53,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:34:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-13 23:34:53,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:34:53,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:53,546 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:53,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:34:53,547 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:53,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:53,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1957995290, now seen corresponding path program 6 times [2020-10-13 23:34:53,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:53,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357330664] [2020-10-13 23:34:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:53,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:53,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:53,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:58,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:34:58,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:34:58,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:58,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:34:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:34:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:34:58,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:58,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:58,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:58,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:58,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:58,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:58,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:58,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:58,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:58,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:58,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 23:34:58,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357330664] [2020-10-13 23:34:58,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:58,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:34:58,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570645520] [2020-10-13 23:34:58,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:34:58,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:58,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:34:58,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:34:58,655 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 10 states. [2020-10-13 23:34:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:58,763 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-13 23:34:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:34:58,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-13 23:34:58,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:58,765 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:34:58,765 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:34:58,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:34:58,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:34:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 23:34:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:34:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-13 23:34:58,771 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 35 [2020-10-13 23:34:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:58,772 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-13 23:34:58,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:34:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-13 23:34:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:34:58,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:58,773 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:58,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:34:58,773 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:58,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1474050655, now seen corresponding path program 7 times [2020-10-13 23:34:58,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:58,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453335078] [2020-10-13 23:34:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:58,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:58,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:03,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:35:03,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:35:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:35:03,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:03,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:35:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:35:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:35:03,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:03,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:03,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:03,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:03,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:03,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:03,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:03,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:03,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:03,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:03,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:03,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:03,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 23:35:03,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453335078] [2020-10-13 23:35:03,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:03,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:35:03,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437535899] [2020-10-13 23:35:03,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:35:03,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:03,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:35:03,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:35:03,897 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 11 states. [2020-10-13 23:35:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:03,994 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-10-13 23:35:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:35:03,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-13 23:35:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:03,996 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:35:03,996 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:35:03,997 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 [2020-10-13 23:35:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:35:04,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 23:35:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:35:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-13 23:35:04,005 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 38 [2020-10-13 23:35:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:04,006 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-13 23:35:04,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:35:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-13 23:35:04,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:35:04,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:04,010 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:04,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:35:04,010 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:04,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:04,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2136639930, now seen corresponding path program 8 times [2020-10-13 23:35:04,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:04,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016709849] [2020-10-13 23:35:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:04,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:09,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:09,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:35:09,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:09,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:35:09,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:09,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:35:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:35:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:35:09,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:09,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:09,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:09,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:09,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:09,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:09,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:09,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:09,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:09,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:09,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:09,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:09,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 23:35:09,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016709849] [2020-10-13 23:35:09,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:09,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:35:09,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661139405] [2020-10-13 23:35:09,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:35:09,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:09,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:35:09,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:35:09,123 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 12 states. [2020-10-13 23:35:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:09,216 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-13 23:35:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:35:09,217 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-13 23:35:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:09,218 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:35:09,218 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:35:09,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:35:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:35:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 23:35:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 23:35:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-13 23:35:09,224 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2020-10-13 23:35:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:09,225 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-13 23:35:09,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:35:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-13 23:35:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:35:09,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:09,226 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:09,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:35:09,226 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1548858751, now seen corresponding path program 9 times [2020-10-13 23:35:09,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:09,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052472406] [2020-10-13 23:35:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:09,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:09,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:09,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:14,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:14,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:35:14,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:14,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:35:14,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:14,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:35:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:35:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:35:14,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:14,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:14,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:14,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:14,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:14,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:14,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:14,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:14,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:14,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:14,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:14,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 23:35:14,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052472406] [2020-10-13 23:35:14,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:14,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:35:14,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002999577] [2020-10-13 23:35:14,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:35:14,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:14,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:35:14,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:35:14,354 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 13 states. [2020-10-13 23:35:14,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:14,461 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-10-13 23:35:14,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:35:14,461 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-13 23:35:14,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:14,462 INFO L225 Difference]: With dead ends: 85 [2020-10-13 23:35:14,462 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 23:35:14,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:35:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 23:35:14,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 23:35:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:35:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 23:35:14,468 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 44 [2020-10-13 23:35:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:14,469 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 23:35:14,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:35:14,469 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 23:35:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:35:14,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:14,470 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:14,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:35:14,470 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:14,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:14,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1397676122, now seen corresponding path program 10 times [2020-10-13 23:35:14,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:14,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433086842] [2020-10-13 23:35:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:14,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:14,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:14,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:19,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:19,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:35:19,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:19,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:35:19,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:19,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:19,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:35:19,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:35:19,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:35:19,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:19,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:19,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:19,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:19,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:19,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:19,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:19,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:19,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:19,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-13 23:35:19,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433086842] [2020-10-13 23:35:19,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:19,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:35:19,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195489127] [2020-10-13 23:35:19,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:35:19,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:19,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:35:19,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:35:19,609 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 14 states. [2020-10-13 23:35:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:19,704 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-13 23:35:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:35:19,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-13 23:35:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:19,706 INFO L225 Difference]: With dead ends: 90 [2020-10-13 23:35:19,706 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:35:19,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:35:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:35:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 23:35:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:35:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-13 23:35:19,712 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 47 [2020-10-13 23:35:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:19,712 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-13 23:35:19,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:35:19,713 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-13 23:35:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:35:19,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:19,714 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:19,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:35:19,714 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash -110123167, now seen corresponding path program 11 times [2020-10-13 23:35:19,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:19,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283662540] [2020-10-13 23:35:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:19,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:19,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:19,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:24,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:24,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:35:24,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:24,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:35:24,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:24,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:24,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:35:24,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:24,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:35:24,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:24,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:24,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:24,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:24,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:24,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:24,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:24,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:24,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:24,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-13 23:35:24,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283662540] [2020-10-13 23:35:24,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:24,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:35:24,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708939629] [2020-10-13 23:35:24,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:35:24,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:24,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:35:24,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:35:24,853 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 15 states. [2020-10-13 23:35:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:24,992 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-10-13 23:35:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:35:24,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-13 23:35:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:24,993 INFO L225 Difference]: With dead ends: 95 [2020-10-13 23:35:24,994 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:35:24,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:35:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:35:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 23:35:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:35:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-13 23:35:25,007 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 50 [2020-10-13 23:35:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:25,007 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-13 23:35:25,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:35:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-13 23:35:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:35:25,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:25,008 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:25,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:35:25,009 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:25,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:25,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1531998470, now seen corresponding path program 12 times [2020-10-13 23:35:25,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:25,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701378930] [2020-10-13 23:35:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:25,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:25,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:30,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:30,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:35:30,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:30,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:35:30,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:30,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:30,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:35:30,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:35:30,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:35:30,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:30,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:30,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:30,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:30,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:30,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:30,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:30,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:30,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:30,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:30,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:30,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:30,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-13 23:35:30,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701378930] [2020-10-13 23:35:30,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:30,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:35:30,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832125412] [2020-10-13 23:35:30,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:35:30,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:30,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:35:30,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:35:30,164 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 16 states. [2020-10-13 23:35:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:30,309 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-13 23:35:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:35:30,309 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-13 23:35:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:30,310 INFO L225 Difference]: With dead ends: 100 [2020-10-13 23:35:30,310 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:35:30,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:35:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:35:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 23:35:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:35:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-13 23:35:30,318 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 53 [2020-10-13 23:35:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:30,318 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-13 23:35:30,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:35:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-13 23:35:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:35:30,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:30,319 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:30,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:35:30,320 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash -420881343, now seen corresponding path program 13 times [2020-10-13 23:35:30,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:30,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961005162] [2020-10-13 23:35:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:30,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:30,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:30,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:35,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:35,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:35:35,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:35,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:35:35,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:35,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:35,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:35:35,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:35,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:35:35,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:35,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:35,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:35,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:35,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:35,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:35,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:35,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:35,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:35,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:35,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:35,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 23:35:35,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961005162] [2020-10-13 23:35:35,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:35,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:35:35,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798069188] [2020-10-13 23:35:35,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:35:35,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:35,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:35:35,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:35:35,489 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 17 states. [2020-10-13 23:35:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:35,653 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2020-10-13 23:35:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:35:35,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2020-10-13 23:35:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:35,655 INFO L225 Difference]: With dead ends: 105 [2020-10-13 23:35:35,655 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:35:35,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:35:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:35:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 23:35:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:35:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-13 23:35:35,662 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2020-10-13 23:35:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:35,662 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-13 23:35:35,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:35:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-13 23:35:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:35:35,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:35,663 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:35,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:35:35,664 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:35,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1004884582, now seen corresponding path program 14 times [2020-10-13 23:35:35,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:35,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3835408] [2020-10-13 23:35:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:35,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:35,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:35,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:40,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:40,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:35:40,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:35:40,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:40,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:35:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:35:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:35:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:40,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:40,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:40,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:40,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:40,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:40,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:40,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:40,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:40,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 23:35:40,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3835408] [2020-10-13 23:35:40,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:40,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:35:40,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482843867] [2020-10-13 23:35:40,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:35:40,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:35:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:35:40,844 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 18 states. [2020-10-13 23:35:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:40,971 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-13 23:35:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:35:40,971 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-10-13 23:35:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:40,972 INFO L225 Difference]: With dead ends: 110 [2020-10-13 23:35:40,972 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:35:40,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:35:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:35:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 23:35:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:35:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-13 23:35:40,978 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 59 [2020-10-13 23:35:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:40,978 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-13 23:35:40,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:35:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-13 23:35:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:35:40,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:40,979 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:40,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:35:40,979 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:40,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1390483167, now seen corresponding path program 15 times [2020-10-13 23:35:40,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:40,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150095703] [2020-10-13 23:35:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:40,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:41,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:41,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:45,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:45,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:35:45,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:45,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:35:45,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:45,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:35:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:35:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:35:45,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:46,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:46,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:46,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:46,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:46,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:46,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:46,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:46,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:46,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:46,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:46,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:46,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-13 23:35:46,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150095703] [2020-10-13 23:35:46,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:46,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:35:46,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508259542] [2020-10-13 23:35:46,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:35:46,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:46,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:35:46,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:35:46,228 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 19 states. [2020-10-13 23:35:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:46,451 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2020-10-13 23:35:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:35:46,451 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-13 23:35:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:46,452 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:35:46,453 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:35:46,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:35:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:35:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 23:35:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:35:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-13 23:35:46,469 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 62 [2020-10-13 23:35:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:46,470 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-13 23:35:46,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:35:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-13 23:35:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:35:46,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:46,474 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:46,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:35:46,475 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2125345850, now seen corresponding path program 16 times [2020-10-13 23:35:46,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:46,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130005807] [2020-10-13 23:35:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:46,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:46,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:46,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:51,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:51,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:35:51,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:51,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:35:51,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:51,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:35:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:35:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:35:51,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:51,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:51,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:51,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:51,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:51,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:51,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:51,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:51,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:51,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:51,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:51,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:51,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-13 23:35:51,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130005807] [2020-10-13 23:35:51,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:51,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:35:51,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456495167] [2020-10-13 23:35:51,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:35:51,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:35:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:35:51,746 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 20 states. [2020-10-13 23:35:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:51,986 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-13 23:35:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:35:51,987 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-10-13 23:35:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:51,988 INFO L225 Difference]: With dead ends: 120 [2020-10-13 23:35:51,988 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:35:51,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:35:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:35:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-13 23:35:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:35:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-13 23:35:51,996 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 65 [2020-10-13 23:35:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:51,996 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-13 23:35:51,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:35:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-13 23:35:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:35:51,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:51,999 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:52,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:35:52,000 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:52,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1332687359, now seen corresponding path program 17 times [2020-10-13 23:35:52,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:52,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110024042] [2020-10-13 23:35:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:52,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:52,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:52,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:57,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:57,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:35:57,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:57,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:35:57,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:57,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:57,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:35:57,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:35:57,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:35:57,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:57,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:57,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:57,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:57,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:57,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:57,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:57,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:57,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:57,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-13 23:35:57,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110024042] [2020-10-13 23:35:57,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:57,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:35:57,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143789867] [2020-10-13 23:35:57,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:35:57,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:57,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:35:57,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:35:57,248 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 21 states. [2020-10-13 23:35:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:57,445 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-13 23:35:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:35:57,446 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-10-13 23:35:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:57,446 INFO L225 Difference]: With dead ends: 125 [2020-10-13 23:35:57,447 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:35:57,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:35:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:35:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 23:35:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:35:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 23:35:57,454 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 68 [2020-10-13 23:35:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:57,454 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 23:35:57,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:35:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 23:35:57,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:35:57,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:57,455 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:57,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:35:57,455 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:57,456 INFO L82 PathProgramCache]: Analyzing trace with hash -33021222, now seen corresponding path program 18 times [2020-10-13 23:35:57,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:57,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571530108] [2020-10-13 23:35:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:57,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:57,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:57,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:02,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:02,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:36:02,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:36:02,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:36:02,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:02,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:36:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:36:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:36:02,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:02,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:02,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:02,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:02,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:02,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:02,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:02,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:02,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:02,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:02,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:02,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:02,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-13 23:36:02,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571530108] [2020-10-13 23:36:02,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:02,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:36:02,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153518385] [2020-10-13 23:36:02,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:36:02,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:02,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:36:02,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:36:02,719 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 22 states. [2020-10-13 23:36:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:02,854 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-13 23:36:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:36:02,854 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 71 [2020-10-13 23:36:02,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:02,855 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:36:02,855 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:36:02,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:36:02,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:36:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 23:36:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:36:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-13 23:36:02,863 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 71 [2020-10-13 23:36:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:02,863 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-13 23:36:02,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:36:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-13 23:36:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:36:02,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:02,864 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:02,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:36:02,866 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:02,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1723757855, now seen corresponding path program 19 times [2020-10-13 23:36:02,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:02,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258097600] [2020-10-13 23:36:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:02,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:07,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:07,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:36:07,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:36:07,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:36:07,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:07,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:07,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:36:07,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:36:07,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:36:07,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:08,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:08,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:08,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:08,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:08,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:08,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:08,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:08,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:08,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-13 23:36:08,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258097600] [2020-10-13 23:36:08,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:08,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:36:08,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705283595] [2020-10-13 23:36:08,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:36:08,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:08,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:36:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:36:08,154 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 23 states. [2020-10-13 23:36:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:08,368 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2020-10-13 23:36:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:36:08,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2020-10-13 23:36:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:08,370 INFO L225 Difference]: With dead ends: 135 [2020-10-13 23:36:08,370 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:36:08,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:36:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:36:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 23:36:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:36:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 23:36:08,380 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 74 [2020-10-13 23:36:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:08,380 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 23:36:08,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:36:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 23:36:08,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:36:08,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:08,385 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:08,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:36:08,386 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:08,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:08,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1471776390, now seen corresponding path program 20 times [2020-10-13 23:36:08,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:08,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11025731] [2020-10-13 23:36:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:08,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:08,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:08,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:13,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:13,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:36:13,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:36:13,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:36:13,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:13,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:13,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:36:13,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:36:13,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:36:13,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:13,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:13,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:13,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:13,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:13,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:13,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:13,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:13,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:13,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:13,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:13,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:13,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-13 23:36:13,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11025731] [2020-10-13 23:36:13,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:13,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:36:13,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793618904] [2020-10-13 23:36:13,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:36:13,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:36:13,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:36:13,691 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 24 states. [2020-10-13 23:36:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:13,854 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-10-13 23:36:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:36:13,856 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-10-13 23:36:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:13,857 INFO L225 Difference]: With dead ends: 140 [2020-10-13 23:36:13,857 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:36:13,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:36:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:36:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-13 23:36:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 23:36:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-13 23:36:13,863 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 77 [2020-10-13 23:36:13,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:13,863 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-13 23:36:13,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:36:13,863 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-13 23:36:13,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:36:13,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:13,864 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:13,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:36:13,864 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:13,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1924341697, now seen corresponding path program 21 times [2020-10-13 23:36:13,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:13,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759043339] [2020-10-13 23:36:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:13,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:13,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:14,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:18,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:18,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:36:18,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:36:18,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:36:18,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:18,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:36:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:36:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:36:18,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:19,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:19,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:19,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:19,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:19,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:19,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:19,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-13 23:36:19,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759043339] [2020-10-13 23:36:19,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:19,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:36:19,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307427976] [2020-10-13 23:36:19,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:36:19,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:19,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:36:19,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:36:19,185 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 25 states. [2020-10-13 23:36:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:19,352 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2020-10-13 23:36:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:36:19,352 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2020-10-13 23:36:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:19,353 INFO L225 Difference]: With dead ends: 145 [2020-10-13 23:36:19,353 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:36:19,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:36:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:36:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 23:36:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:36:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-13 23:36:19,358 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 80 [2020-10-13 23:36:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:19,359 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-13 23:36:19,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:36:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-13 23:36:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:36:19,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:19,360 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:19,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:36:19,361 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash 473114, now seen corresponding path program 22 times [2020-10-13 23:36:19,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:19,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722992821] [2020-10-13 23:36:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:19,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:19,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:24,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:24,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:36:24,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:24,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:36:24,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:24,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:36:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:36:24,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:24,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:24,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:24,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:24,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:24,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:24,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:24,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:24,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:24,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-13 23:36:24,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722992821] [2020-10-13 23:36:24,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:24,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:36:24,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290780845] [2020-10-13 23:36:24,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:36:24,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:24,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:36:24,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:36:24,724 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 26 states. [2020-10-13 23:36:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:24,935 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2020-10-13 23:36:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:36:24,942 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 83 [2020-10-13 23:36:24,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:24,943 INFO L225 Difference]: With dead ends: 150 [2020-10-13 23:36:24,943 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:36:24,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:36:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:36:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 23:36:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 23:36:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-13 23:36:24,948 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 83 [2020-10-13 23:36:24,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:24,948 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-13 23:36:24,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:36:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-13 23:36:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 23:36:24,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:24,950 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:24,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:36:24,950 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:24,950 INFO L82 PathProgramCache]: Analyzing trace with hash -874017631, now seen corresponding path program 23 times [2020-10-13 23:36:24,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:24,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602268548] [2020-10-13 23:36:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:25,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:29,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:29,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 23:36:29,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:29,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:36:29,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:29,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:29,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:36:29,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:29,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:36:29,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:30,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:30,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:30,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:30,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:30,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:30,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:30,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:30,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:30,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:30,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:30,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-10-13 23:36:30,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602268548] [2020-10-13 23:36:30,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:30,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:36:30,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978471194] [2020-10-13 23:36:30,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:36:30,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:30,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:36:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:36:30,325 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 27 states. [2020-10-13 23:36:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:30,564 INFO L93 Difference]: Finished difference Result 155 states and 163 transitions. [2020-10-13 23:36:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:36:30,565 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 86 [2020-10-13 23:36:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:30,565 INFO L225 Difference]: With dead ends: 155 [2020-10-13 23:36:30,566 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:36:30,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:36:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:36:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-13 23:36:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:36:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-10-13 23:36:30,574 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2020-10-13 23:36:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:30,574 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-10-13 23:36:30,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:36:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-10-13 23:36:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:36:30,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:30,576 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:30,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:36:30,576 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:30,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2073534790, now seen corresponding path program 24 times [2020-10-13 23:36:30,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:30,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717116131] [2020-10-13 23:36:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:30,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:30,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:35,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:35,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:36:35,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:35,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:36:35,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:35,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:36:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:36:35,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:36:35,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:35,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:35,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:35,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:35,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:35,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:35,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:35,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:35,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:35,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:35,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:35,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:35,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 23:36:35,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717116131] [2020-10-13 23:36:35,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:35,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:36:35,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217804129] [2020-10-13 23:36:35,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:36:35,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:35,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:36:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:36:35,991 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 28 states. [2020-10-13 23:36:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:36,227 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2020-10-13 23:36:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:36:36,227 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 89 [2020-10-13 23:36:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:36,228 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:36:36,228 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:36:36,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:36:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:36:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 23:36:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 23:36:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-13 23:36:36,234 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 89 [2020-10-13 23:36:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:36,235 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-13 23:36:36,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:36:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-13 23:36:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:36:36,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:36,236 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:36,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:36:36,237 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:36,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:36,238 INFO L82 PathProgramCache]: Analyzing trace with hash -681520767, now seen corresponding path program 25 times [2020-10-13 23:36:36,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:36,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044576343] [2020-10-13 23:36:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:36,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:36,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:41,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:41,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:36:41,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:41,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:36:41,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:41,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:41,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:36:41,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:41,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:36:41,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:41,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:41,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:41,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:41,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:41,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:41,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:41,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:41,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:41,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:41,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:41,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:41,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-13 23:36:41,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044576343] [2020-10-13 23:36:41,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:41,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:36:41,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124045271] [2020-10-13 23:36:41,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:36:41,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:41,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:36:41,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:36:41,671 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 29 states. [2020-10-13 23:36:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:41,920 INFO L93 Difference]: Finished difference Result 165 states and 173 transitions. [2020-10-13 23:36:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:36:41,920 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-10-13 23:36:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:41,921 INFO L225 Difference]: With dead ends: 165 [2020-10-13 23:36:41,922 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 23:36:41,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:36:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 23:36:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-13 23:36:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:36:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-10-13 23:36:41,928 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 92 [2020-10-13 23:36:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:41,928 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-10-13 23:36:41,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:36:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-10-13 23:36:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 23:36:41,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:41,929 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:41,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:36:41,930 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:41,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:41,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1861751462, now seen corresponding path program 26 times [2020-10-13 23:36:41,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:41,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275126079] [2020-10-13 23:36:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:41,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:42,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:46,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:46,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 23:36:46,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:46,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:36:46,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:46,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:36:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:36:46,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:47,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:47,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:47,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:47,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:47,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:47,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:36:47,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:47,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:47,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-10-13 23:36:47,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275126079] [2020-10-13 23:36:47,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:47,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:36:47,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945712733] [2020-10-13 23:36:47,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:36:47,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:36:47,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:36:47,349 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 30 states. [2020-10-13 23:36:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:47,621 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2020-10-13 23:36:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:36:47,622 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 95 [2020-10-13 23:36:47,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:47,623 INFO L225 Difference]: With dead ends: 170 [2020-10-13 23:36:47,623 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 23:36:47,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:36:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 23:36:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-13 23:36:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:36:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-13 23:36:47,632 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 95 [2020-10-13 23:36:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:47,632 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-13 23:36:47,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:36:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-13 23:36:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 23:36:47,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:47,635 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:47,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:36:47,635 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1960776095, now seen corresponding path program 27 times [2020-10-13 23:36:47,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:47,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946665813] [2020-10-13 23:36:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:47,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:47,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:52,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:52,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 23:36:52,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:52,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:36:52,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:52,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:36:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 23:36:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:36:52,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:53,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:53,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:53,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:53,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:53,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:53,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:36:53,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:53,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:53,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:53,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:53,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:53,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2020-10-13 23:36:53,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946665813] [2020-10-13 23:36:53,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:53,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:36:53,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389075908] [2020-10-13 23:36:53,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:36:53,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:53,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:36:53,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:36:53,128 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 31 states. [2020-10-13 23:36:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:53,358 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2020-10-13 23:36:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:36:53,358 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 98 [2020-10-13 23:36:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:53,360 INFO L225 Difference]: With dead ends: 175 [2020-10-13 23:36:53,360 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:36:53,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:36:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:36:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 23:36:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:36:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-13 23:36:53,366 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 98 [2020-10-13 23:36:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:53,366 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-13 23:36:53,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:36:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-13 23:36:53,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:36:53,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:53,368 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:53,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:36:53,368 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:53,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1040442362, now seen corresponding path program 28 times [2020-10-13 23:36:53,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:53,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322510887] [2020-10-13 23:36:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:53,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:53,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:58,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:58,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:36:58,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:36:58,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:58,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:58,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:36:58,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:36:58,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:36:58,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:58,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:58,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:58,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:58,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:58,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:58,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:58,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:58,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:58,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:58,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:58,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:58,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-10-13 23:36:58,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322510887] [2020-10-13 23:36:58,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:58,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:36:58,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84381597] [2020-10-13 23:36:58,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:36:58,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:58,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:36:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:36:58,865 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 32 states. [2020-10-13 23:36:59,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:59,062 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2020-10-13 23:36:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:36:59,063 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 101 [2020-10-13 23:36:59,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:59,064 INFO L225 Difference]: With dead ends: 180 [2020-10-13 23:36:59,064 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:36:59,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:36:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:36:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-13 23:36:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 23:36:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-10-13 23:36:59,071 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 101 [2020-10-13 23:36:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:59,071 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-10-13 23:36:59,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:36:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-10-13 23:36:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 23:36:59,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:59,073 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:59,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:36:59,073 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:59,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:59,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1062608063, now seen corresponding path program 29 times [2020-10-13 23:36:59,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:59,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505532251] [2020-10-13 23:36:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:59,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:59,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:04,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:04,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 23:37:04,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:04,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:37:04,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:04,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:04,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:37:04,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:04,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:37:04,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:04,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:04,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:04,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:04,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:04,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:04,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:04,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:04,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:04,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-10-13 23:37:04,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505532251] [2020-10-13 23:37:04,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:04,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:37:04,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043120879] [2020-10-13 23:37:04,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:37:04,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:04,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:37:04,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:37:04,603 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 33 states. [2020-10-13 23:37:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:04,839 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2020-10-13 23:37:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:37:04,840 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 104 [2020-10-13 23:37:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:04,841 INFO L225 Difference]: With dead ends: 185 [2020-10-13 23:37:04,841 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 23:37:04,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:37:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 23:37:04,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-13 23:37:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:37:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-13 23:37:04,850 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 104 [2020-10-13 23:37:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:04,851 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-13 23:37:04,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:37:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-13 23:37:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:37:04,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:04,853 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:04,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:37:04,854 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:04,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:04,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1073365658, now seen corresponding path program 30 times [2020-10-13 23:37:04,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:04,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594902068] [2020-10-13 23:37:04,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:04,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:04,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:09,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:09,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:37:09,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:09,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:37:09,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:09,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:37:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:09,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:37:09,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:10,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:10,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:10,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:10,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:10,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:10,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:10,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:10,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:10,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:10,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:10,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:10,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2020-10-13 23:37:10,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594902068] [2020-10-13 23:37:10,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:10,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:37:10,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766302736] [2020-10-13 23:37:10,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:37:10,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:37:10,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:37:10,443 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 34 states. [2020-10-13 23:37:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:10,731 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2020-10-13 23:37:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:37:10,733 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 107 [2020-10-13 23:37:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:10,734 INFO L225 Difference]: With dead ends: 190 [2020-10-13 23:37:10,734 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:37:10,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:37:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:37:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-13 23:37:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 23:37:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-10-13 23:37:10,742 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 107 [2020-10-13 23:37:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:10,742 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-10-13 23:37:10,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:37:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-10-13 23:37:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 23:37:10,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:10,745 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:10,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:37:10,745 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:10,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1425911841, now seen corresponding path program 31 times [2020-10-13 23:37:10,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:10,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280932270] [2020-10-13 23:37:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:10,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:10,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:15,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:15,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 23:37:15,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:15,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:37:15,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:15,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:15,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:37:15,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 23:37:15,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:37:15,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:16,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:16,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:16,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:16,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:16,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:16,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:16,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:16,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:16,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:16,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:16,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:37:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-13 23:37:16,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280932270] [2020-10-13 23:37:16,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:16,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:37:16,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44959188] [2020-10-13 23:37:16,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:37:16,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:16,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:37:16,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:37:16,622 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 35 states. [2020-10-13 23:37:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:16,917 INFO L93 Difference]: Finished difference Result 195 states and 203 transitions. [2020-10-13 23:37:16,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:37:16,918 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 110 [2020-10-13 23:37:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:16,919 INFO L225 Difference]: With dead ends: 195 [2020-10-13 23:37:16,919 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 23:37:16,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:37:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 23:37:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-13 23:37:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:37:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-13 23:37:16,931 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 110 [2020-10-13 23:37:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:16,932 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-13 23:37:16,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:37:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-13 23:37:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 23:37:16,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:16,935 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:16,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:37:16,935 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash -938931910, now seen corresponding path program 32 times [2020-10-13 23:37:16,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:16,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158253092] [2020-10-13 23:37:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:16,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:17,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:21,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:21,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 23:37:21,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:21,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:37:21,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:21,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:21,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:37:21,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:37:21,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:37:21,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:22,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:22,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:22,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:22,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:22,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:22,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:22,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:22,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:22,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:22,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:37:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-10-13 23:37:22,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158253092] [2020-10-13 23:37:22,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:22,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:37:22,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830668585] [2020-10-13 23:37:22,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:37:22,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:22,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:37:22,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:37:22,663 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 36 states. [2020-10-13 23:37:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:23,003 INFO L93 Difference]: Finished difference Result 200 states and 208 transitions. [2020-10-13 23:37:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:37:23,003 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 113 [2020-10-13 23:37:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:23,005 INFO L225 Difference]: With dead ends: 200 [2020-10-13 23:37:23,005 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:37:23,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:37:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:37:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-13 23:37:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 23:37:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-10-13 23:37:23,018 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 113 [2020-10-13 23:37:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:23,019 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-10-13 23:37:23,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:37:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-10-13 23:37:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 23:37:23,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:23,024 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:23,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:37:23,024 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1218336001, now seen corresponding path program 33 times [2020-10-13 23:37:23,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:23,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143165917] [2020-10-13 23:37:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:23,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:23,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:28,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:28,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 23:37:28,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:28,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:37:28,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:28,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:28,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:37:28,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:28,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:37:28,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:28,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:28,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:28,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:28,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:28,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:28,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:28,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:28,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:28,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:28,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:28,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:28,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-13 23:37:28,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143165917] [2020-10-13 23:37:28,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:28,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:37:28,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329167945] [2020-10-13 23:37:28,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:37:28,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:28,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:37:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:37:28,712 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 37 states. [2020-10-13 23:37:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:29,045 INFO L93 Difference]: Finished difference Result 205 states and 213 transitions. [2020-10-13 23:37:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:37:29,045 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 116 [2020-10-13 23:37:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:29,047 INFO L225 Difference]: With dead ends: 205 [2020-10-13 23:37:29,047 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:37:29,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:37:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:37:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-13 23:37:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:37:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-10-13 23:37:29,053 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 116 [2020-10-13 23:37:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:29,053 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-10-13 23:37:29,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:37:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-10-13 23:37:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:37:29,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:29,055 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:29,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:37:29,055 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:29,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:29,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1674459098, now seen corresponding path program 34 times [2020-10-13 23:37:29,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:29,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378975231] [2020-10-13 23:37:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:29,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:29,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:34,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:34,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:37:34,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:34,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:37:34,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:34,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:34,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:37:34,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:34,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:37:34,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:34,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:34,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:34,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:34,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:34,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:34,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:34,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:34,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:34,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-13 23:37:34,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378975231] [2020-10-13 23:37:34,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:34,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:37:34,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068011771] [2020-10-13 23:37:34,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:37:34,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:34,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:37:34,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:37:34,740 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 38 states. [2020-10-13 23:37:35,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:35,041 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-10-13 23:37:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:37:35,042 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 119 [2020-10-13 23:37:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:35,043 INFO L225 Difference]: With dead ends: 210 [2020-10-13 23:37:35,043 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 23:37:35,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:37:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 23:37:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-13 23:37:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 23:37:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-10-13 23:37:35,049 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 119 [2020-10-13 23:37:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:35,049 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-10-13 23:37:35,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:37:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-10-13 23:37:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 23:37:35,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:35,051 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:35,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:37:35,051 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:35,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:35,051 INFO L82 PathProgramCache]: Analyzing trace with hash -544353823, now seen corresponding path program 35 times [2020-10-13 23:37:35,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:35,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328866745] [2020-10-13 23:37:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:35,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:35,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:40,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:40,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 23:37:40,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:40,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:37:40,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:40,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:40,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:37:40,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:37:40,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:37:40,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:40,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:40,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:40,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:40,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:40,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:40,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:40,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:40,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:40,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:40,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:40,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:40,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-13 23:37:40,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328866745] [2020-10-13 23:37:40,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:40,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:37:40,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721008825] [2020-10-13 23:37:40,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:37:40,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:40,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:37:40,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:37:40,799 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 39 states. [2020-10-13 23:37:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:41,053 INFO L93 Difference]: Finished difference Result 215 states and 223 transitions. [2020-10-13 23:37:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:37:41,053 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 122 [2020-10-13 23:37:41,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:41,054 INFO L225 Difference]: With dead ends: 215 [2020-10-13 23:37:41,054 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 23:37:41,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:37:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 23:37:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-13 23:37:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:37:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2020-10-13 23:37:41,060 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 122 [2020-10-13 23:37:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:41,061 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2020-10-13 23:37:41,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:37:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2020-10-13 23:37:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 23:37:41,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:41,062 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:41,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:37:41,062 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:41,062 INFO L82 PathProgramCache]: Analyzing trace with hash -580399494, now seen corresponding path program 36 times [2020-10-13 23:37:41,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:41,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885452251] [2020-10-13 23:37:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:41,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:46,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:46,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 23:37:46,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:46,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:37:46,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:46,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:37:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:37:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:37:46,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:46,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:46,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:46,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:46,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:46,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:46,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:46,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:46,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:46,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2020-10-13 23:37:46,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885452251] [2020-10-13 23:37:46,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:46,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:37:46,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299098497] [2020-10-13 23:37:46,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:37:46,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:46,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:37:46,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:37:46,831 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand 40 states. [2020-10-13 23:37:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:47,185 INFO L93 Difference]: Finished difference Result 220 states and 228 transitions. [2020-10-13 23:37:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:37:47,185 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 125 [2020-10-13 23:37:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:47,187 INFO L225 Difference]: With dead ends: 220 [2020-10-13 23:37:47,187 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 23:37:47,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:37:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 23:37:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-13 23:37:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:37:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-10-13 23:37:47,193 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 125 [2020-10-13 23:37:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:47,194 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-10-13 23:37:47,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:37:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-10-13 23:37:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 23:37:47,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:47,195 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:47,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:37:47,195 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:47,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1051842879, now seen corresponding path program 37 times [2020-10-13 23:37:47,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:47,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14744275] [2020-10-13 23:37:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:47,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:47,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:52,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:52,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 23:37:52,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:52,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:37:52,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:52,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:52,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:37:52,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 23:37:52,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:37:52,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:52,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:52,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:52,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:52,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:52,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:52,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:52,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:52,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:52,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:52,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:52,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:52,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-10-13 23:37:53,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14744275] [2020-10-13 23:37:53,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:53,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:37:53,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296435689] [2020-10-13 23:37:53,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:37:53,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:53,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:37:53,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:37:53,011 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 41 states. [2020-10-13 23:37:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:53,291 INFO L93 Difference]: Finished difference Result 225 states and 233 transitions. [2020-10-13 23:37:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:37:53,292 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 128 [2020-10-13 23:37:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:53,293 INFO L225 Difference]: With dead ends: 225 [2020-10-13 23:37:53,293 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:37:53,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:37:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:37:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-13 23:37:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:37:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2020-10-13 23:37:53,299 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 128 [2020-10-13 23:37:53,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:53,299 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2020-10-13 23:37:53,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:37:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2020-10-13 23:37:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:37:53,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:53,300 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:53,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:37:53,301 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:53,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:53,301 INFO L82 PathProgramCache]: Analyzing trace with hash 460573978, now seen corresponding path program 38 times [2020-10-13 23:37:53,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:53,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894564738] [2020-10-13 23:37:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:53,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:53,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:58,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:58,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:37:58,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:58,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:37:58,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:58,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:58,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:37:58,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:37:58,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:37:58,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:59,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:59,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:59,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:59,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:59,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:59,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:59,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:59,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:59,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:59,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:59,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-10-13 23:37:59,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894564738] [2020-10-13 23:37:59,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:59,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:37:59,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953654122] [2020-10-13 23:37:59,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:37:59,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:37:59,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:37:59,160 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 42 states. [2020-10-13 23:37:59,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:59,611 INFO L93 Difference]: Finished difference Result 230 states and 238 transitions. [2020-10-13 23:37:59,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:37:59,612 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 131 [2020-10-13 23:37:59,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:59,614 INFO L225 Difference]: With dead ends: 230 [2020-10-13 23:37:59,614 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:37:59,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:37:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:37:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-13 23:37:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 23:37:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2020-10-13 23:37:59,623 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 131 [2020-10-13 23:37:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:59,623 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2020-10-13 23:37:59,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:37:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2020-10-13 23:37:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 23:37:59,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:59,625 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:59,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:37:59,626 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash 417420193, now seen corresponding path program 39 times [2020-10-13 23:37:59,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:59,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102709034] [2020-10-13 23:37:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:59,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:59,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:04,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:04,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 23:38:04,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:04,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:38:04,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:04,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:04,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:38:04,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:04,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:38:04,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:05,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:05,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:05,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:05,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:05,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:05,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:05,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:05,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:05,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:05,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-10-13 23:38:05,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102709034] [2020-10-13 23:38:05,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:05,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:38:05,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665450397] [2020-10-13 23:38:05,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:38:05,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:38:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:38:05,531 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 43 states. [2020-10-13 23:38:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:05,849 INFO L93 Difference]: Finished difference Result 235 states and 243 transitions. [2020-10-13 23:38:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:38:05,849 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 134 [2020-10-13 23:38:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:05,851 INFO L225 Difference]: With dead ends: 235 [2020-10-13 23:38:05,851 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:38:05,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:38:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:38:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-13 23:38:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:38:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2020-10-13 23:38:05,858 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 134 [2020-10-13 23:38:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:05,858 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2020-10-13 23:38:05,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:38:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2020-10-13 23:38:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:38:05,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:05,860 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:05,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:38:05,860 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:05,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:05,860 INFO L82 PathProgramCache]: Analyzing trace with hash 17839034, now seen corresponding path program 40 times [2020-10-13 23:38:05,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:05,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47178506] [2020-10-13 23:38:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:05,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:06,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:10,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:10,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:38:10,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:10,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:38:10,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:10,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:10,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:38:10,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:38:10,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:38:10,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:11,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:11,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:11,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:11,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:11,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:11,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:11,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:11,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:11,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:11,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:11,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:11,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-13 23:38:11,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47178506] [2020-10-13 23:38:11,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:11,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:38:11,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672137706] [2020-10-13 23:38:11,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:38:11,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:11,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:38:11,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:38:11,806 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand 44 states. [2020-10-13 23:38:12,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:12,137 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2020-10-13 23:38:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:38:12,138 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 137 [2020-10-13 23:38:12,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:12,139 INFO L225 Difference]: With dead ends: 240 [2020-10-13 23:38:12,139 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 23:38:12,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:38:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 23:38:12,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-13 23:38:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 23:38:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2020-10-13 23:38:12,144 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 137 [2020-10-13 23:38:12,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:12,144 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2020-10-13 23:38:12,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:38:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2020-10-13 23:38:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 23:38:12,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:12,146 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:12,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:38:12,146 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:12,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1261873023, now seen corresponding path program 41 times [2020-10-13 23:38:12,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:12,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893584249] [2020-10-13 23:38:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:12,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:12,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:17,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:17,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 23:38:17,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:17,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:38:17,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:17,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:17,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 23:38:17,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 23:38:17,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 23:38:17,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:18,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:18,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:18,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:18,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:18,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:18,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:18,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:18,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:18,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:18,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:18,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:18,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2020-10-13 23:38:18,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893584249] [2020-10-13 23:38:18,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:18,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 23:38:18,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193832004] [2020-10-13 23:38:18,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 23:38:18,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:18,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 23:38:18,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:38:18,141 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand 45 states. [2020-10-13 23:38:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:18,523 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2020-10-13 23:38:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 23:38:18,523 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 140 [2020-10-13 23:38:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:18,525 INFO L225 Difference]: With dead ends: 245 [2020-10-13 23:38:18,525 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 23:38:18,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:38:18,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 23:38:18,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-13 23:38:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 23:38:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2020-10-13 23:38:18,531 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 140 [2020-10-13 23:38:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:18,532 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2020-10-13 23:38:18,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 23:38:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2020-10-13 23:38:18,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 23:38:18,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:18,533 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:18,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:38:18,533 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:18,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:18,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1306198618, now seen corresponding path program 42 times [2020-10-13 23:38:18,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:18,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817482722] [2020-10-13 23:38:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:18,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:18,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:23,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:23,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 23:38:23,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:23,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:38:23,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:23,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:23,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 23:38:23,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:38:23,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:38:23,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:24,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:24,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:24,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:24,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:24,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:24,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:24,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:24,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:24,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2020-10-13 23:38:24,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817482722] [2020-10-13 23:38:24,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:24,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 23:38:24,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497347650] [2020-10-13 23:38:24,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 23:38:24,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:24,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 23:38:24,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:38:24,571 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand 46 states. [2020-10-13 23:38:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:24,860 INFO L93 Difference]: Finished difference Result 250 states and 258 transitions. [2020-10-13 23:38:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 23:38:24,861 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 143 [2020-10-13 23:38:24,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:24,862 INFO L225 Difference]: With dead ends: 250 [2020-10-13 23:38:24,862 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 23:38:24,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:38:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 23:38:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-13 23:38:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 23:38:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2020-10-13 23:38:24,869 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 143 [2020-10-13 23:38:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:24,869 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2020-10-13 23:38:24,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 23:38:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2020-10-13 23:38:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 23:38:24,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:24,870 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:24,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:38:24,870 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:24,871 INFO L82 PathProgramCache]: Analyzing trace with hash 654849377, now seen corresponding path program 43 times [2020-10-13 23:38:24,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:24,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29597071] [2020-10-13 23:38:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:24,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:25,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:29,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:29,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 23:38:29,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:29,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:38:29,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:29,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 23:38:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:38:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 23:38:29,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:30,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:30,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:30,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:30,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:30,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:30,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:30,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:30,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:30,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-10-13 23:38:30,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29597071] [2020-10-13 23:38:30,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:30,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 23:38:30,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359085829] [2020-10-13 23:38:30,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 23:38:30,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 23:38:30,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:38:30,946 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand 47 states. [2020-10-13 23:38:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:31,387 INFO L93 Difference]: Finished difference Result 255 states and 263 transitions. [2020-10-13 23:38:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 23:38:31,388 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 146 [2020-10-13 23:38:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:31,389 INFO L225 Difference]: With dead ends: 255 [2020-10-13 23:38:31,389 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:38:31,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:38:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:38:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-13 23:38:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 23:38:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2020-10-13 23:38:31,395 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 146 [2020-10-13 23:38:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:31,396 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2020-10-13 23:38:31,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 23:38:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2020-10-13 23:38:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 23:38:31,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:31,397 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:31,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:38:31,397 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:31,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:31,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2113026298, now seen corresponding path program 44 times [2020-10-13 23:38:31,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:31,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609701381] [2020-10-13 23:38:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:31,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:36,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:36,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 23:38:36,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:36,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:38:36,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:36,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:36,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 23:38:36,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 23:38:36,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:38:36,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:37,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:37,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:37,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:37,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:37,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:37,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:37,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:37,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:37,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:37,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:37,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:37,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2020-10-13 23:38:37,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609701381] [2020-10-13 23:38:37,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:37,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 23:38:37,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756386073] [2020-10-13 23:38:37,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 23:38:37,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:37,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 23:38:37,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:38:37,518 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand 48 states. [2020-10-13 23:38:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:37,945 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2020-10-13 23:38:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 23:38:37,945 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 149 [2020-10-13 23:38:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:37,947 INFO L225 Difference]: With dead ends: 260 [2020-10-13 23:38:37,947 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:38:37,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:38:37,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:38:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-13 23:38:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 23:38:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2020-10-13 23:38:37,952 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 149 [2020-10-13 23:38:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:37,952 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2020-10-13 23:38:37,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 23:38:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2020-10-13 23:38:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 23:38:37,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:37,953 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:37,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:38:37,953 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:37,953 INFO L82 PathProgramCache]: Analyzing trace with hash -450893247, now seen corresponding path program 45 times [2020-10-13 23:38:37,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:37,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409097550] [2020-10-13 23:38:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:37,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:42,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:42,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 23:38:42,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:42,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:38:42,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:42,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:42,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 23:38:42,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 23:38:42,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:38:42,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:44,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:44,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:44,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:44,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:44,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:44,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:44,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:44,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:44,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:44,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2020-10-13 23:38:44,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409097550] [2020-10-13 23:38:44,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:44,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 23:38:44,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778637555] [2020-10-13 23:38:44,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 23:38:44,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:44,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 23:38:44,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 23:38:44,095 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand 49 states. [2020-10-13 23:38:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:44,432 INFO L93 Difference]: Finished difference Result 265 states and 273 transitions. [2020-10-13 23:38:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 23:38:44,433 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 152 [2020-10-13 23:38:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:44,434 INFO L225 Difference]: With dead ends: 265 [2020-10-13 23:38:44,434 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:38:44,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 23:38:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:38:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-13 23:38:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 23:38:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2020-10-13 23:38:44,441 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 152 [2020-10-13 23:38:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:44,441 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2020-10-13 23:38:44,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 23:38:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2020-10-13 23:38:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 23:38:44,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:44,442 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:44,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:38:44,443 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:44,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:44,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1443637350, now seen corresponding path program 46 times [2020-10-13 23:38:44,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:44,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680840225] [2020-10-13 23:38:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:44,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:44,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking...