/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_copy4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:30:33,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:30:33,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:30:33,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:30:33,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:30:33,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:30:33,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:30:33,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:30:33,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:30:33,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:30:33,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:30:33,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:30:33,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:30:33,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:30:33,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:30:33,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:30:33,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:30:33,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:30:33,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:30:33,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:30:33,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:30:33,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:30:33,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:30:33,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:30:33,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:30:33,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:30:33,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:30:33,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:30:33,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:30:33,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:30:33,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:30:33,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:30:33,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:30:33,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:30:33,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:30:33,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:30:33,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:30:33,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:30:33,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:30:33,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:30:33,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:30:33,845 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 23:30:33,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:30:33,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:30:33,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:30:33,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:30:33,888 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:30:33,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:30:33,888 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:30:33,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:30:33,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:30:33,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:30:33,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:30:33,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:30:33,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:30:33,891 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:30:33,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:30:33,891 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:30:33,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:30:33,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:30:33,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:30:33,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:30:33,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:30:33,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:30:33,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:30:33,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:30:33,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:30:33,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:30:33,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:30:33,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:30:33,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:30:33,894 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 23:30:34,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:30:34,247 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:30:34,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:30:34,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:30:34,264 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:30:34,264 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2020-10-13 23:30:34,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c589be01/df53a51ff72f4c2e9704975d2380d456/FLAG7f7ad332a [2020-10-13 23:30:34,774 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:30:34,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2020-10-13 23:30:34,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c589be01/df53a51ff72f4c2e9704975d2380d456/FLAG7f7ad332a [2020-10-13 23:30:35,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c589be01/df53a51ff72f4c2e9704975d2380d456 [2020-10-13 23:30:35,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:30:35,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:30:35,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:35,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:30:35,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:30:35,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:35" (1/1) ... [2020-10-13 23:30:35,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72eb96f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35, skipping insertion in model container [2020-10-13 23:30:35,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:35" (1/1) ... [2020-10-13 23:30:35,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:30:35,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:30:35,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:35,487 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:30:35,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:35,536 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:30:35,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35 WrapperNode [2020-10-13 23:30:35,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:35,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:30:35,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:30:35,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:30:35,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35" (1/1) ... [2020-10-13 23:30:35,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35" (1/1) ... [2020-10-13 23:30:35,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35" (1/1) ... [2020-10-13 23:30:35,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35" (1/1) ... [2020-10-13 23:30:35,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35" (1/1) ... [2020-10-13 23:30:35,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35" (1/1) ... [2020-10-13 23:30:35,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35" (1/1) ... [2020-10-13 23:30:35,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:30:35,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:30:35,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:30:35,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:30:35,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35" (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 23:30:35,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:30:35,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:30:35,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:30:35,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:30:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:30:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:30:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:30:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:30:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:30:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:30:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:30:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:30:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:30:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:30:36,030 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:30:36,031 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-13 23:30:36,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:36 BoogieIcfgContainer [2020-10-13 23:30:36,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:30:36,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:30:36,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:30:36,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:30:36,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:30:35" (1/3) ... [2020-10-13 23:30:36,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29180286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:36, skipping insertion in model container [2020-10-13 23:30:36,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:35" (2/3) ... [2020-10-13 23:30:36,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29180286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:36, skipping insertion in model container [2020-10-13 23:30:36,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:36" (3/3) ... [2020-10-13 23:30:36,045 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2020-10-13 23:30:36,056 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:30:36,066 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:30:36,087 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:30:36,121 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:30:36,121 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:30:36,121 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:30:36,122 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:30:36,122 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:30:36,122 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:30:36,122 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:30:36,123 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:30:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-13 23:30:36,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:30:36,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:36,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:36,155 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:36,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1010407240, now seen corresponding path program 1 times [2020-10-13 23:30:36,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:36,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356770189] [2020-10-13 23:30:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:36,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:36,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:36,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:36,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:36,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:37,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:37,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:30:37,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:30:37,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1057 [2020-10-13 23:30:37,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:37,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:37,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:37,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:30:37,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:37,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:30:37,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:37,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:37,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:37,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:37,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:37,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:30:37,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:37,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:37,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:37,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:37,461 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 23:30:37,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356770189] [2020-10-13 23:30:37,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:37,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:30:37,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589736922] [2020-10-13 23:30:37,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:30:37,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:37,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:30:37,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:30:37,492 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-13 23:30:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:37,610 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-10-13 23:30:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:30:37,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-13 23:30:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:37,621 INFO L225 Difference]: With dead ends: 64 [2020-10-13 23:30:37,621 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:30:37,625 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 23:30:37,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:30:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 23:30:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:30:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 23:30:37,667 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-13 23:30:37,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:37,668 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 23:30:37,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:30:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 23:30:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:30:37,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:37,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:37,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:30:37,670 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:37,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:37,670 INFO L82 PathProgramCache]: Analyzing trace with hash 555030978, now seen corresponding path program 1 times [2020-10-13 23:30:37,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:37,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554315909] [2020-10-13 23:30:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:37,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:37,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:37,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:37,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:37,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:38,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:30:38,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:30:38,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-13 23:30:38,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:38,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:38,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:38,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:30:38,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:38,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:30:38,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:38,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:38,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:38,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:38,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 23:30:38,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:38,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:38,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:38,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:38,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:30:38,400 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 23:30:38,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554315909] [2020-10-13 23:30:38,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:38,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:38,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128887066] [2020-10-13 23:30:38,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:38,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:38,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:38,406 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2020-10-13 23:30:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:38,524 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-10-13 23:30:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:38,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 23:30:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:38,527 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:30:38,527 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:30:38,528 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 23:30:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:30:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-13 23:30:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:30:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-13 23:30:38,537 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2020-10-13 23:30:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:38,538 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-13 23:30:38,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-13 23:30:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:30:38,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:38,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:38,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:30:38,540 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1377677638, now seen corresponding path program 1 times [2020-10-13 23:30:38,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:38,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094546246] [2020-10-13 23:30:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:38,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:38,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:40,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:43,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:30:43,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:30:43,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4984 [2020-10-13 23:30:43,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:43,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:43,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:43,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:43,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:43,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:43,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:43,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:43,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:43,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:43,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:43,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:43,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:43,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:43,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:43,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:43,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:30:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:30:43,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094546246] [2020-10-13 23:30:43,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:43,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:43,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918285104] [2020-10-13 23:30:43,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:43,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:43,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:43,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:43,596 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 4 states. [2020-10-13 23:30:43,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:43,708 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-13 23:30:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:43,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-13 23:30:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:43,710 INFO L225 Difference]: With dead ends: 64 [2020-10-13 23:30:43,711 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:30:43,712 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 23:30:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:30:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 23:30:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:30:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-13 23:30:43,724 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2020-10-13 23:30:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:43,725 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-13 23:30:43,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-13 23:30:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:30:43,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:43,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:43,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:30:43,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:43,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:43,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1986876888, now seen corresponding path program 1 times [2020-10-13 23:30:43,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:43,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083109278] [2020-10-13 23:30:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:43,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:48,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:30:48,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:30:48,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:30:48,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:48,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:48,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:30:48,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:30:48,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:30:48,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:48,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:48,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:48,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:48,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:48,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:48,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:48,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:48,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:48,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:48,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:48,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:30:48,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083109278] [2020-10-13 23:30:48,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:48,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:30:48,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598810160] [2020-10-13 23:30:48,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:30:48,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:48,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:30:48,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:30:48,809 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2020-10-13 23:30:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:48,939 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-13 23:30:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:30:48,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-13 23:30:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:48,940 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:30:48,940 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 23:30:48,941 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 23:30:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 23:30:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-13 23:30:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:30:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 23:30:48,949 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 31 [2020-10-13 23:30:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:48,949 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 23:30:48,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:30:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 23:30:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:30:48,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:48,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:48,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:30:48,951 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1475441872, now seen corresponding path program 2 times [2020-10-13 23:30:48,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:48,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346803176] [2020-10-13 23:30:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:48,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:49,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:53,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:30:53,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:30:53,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:30:53,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:53,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:30:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:30:53,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:30:53,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:54,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:54,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:54,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:54,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:54,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:54,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:54,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:54,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 23:30:54,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346803176] [2020-10-13 23:30:54,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:54,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:30:54,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123124860] [2020-10-13 23:30:54,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:30:54,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:54,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:30:54,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:30:54,055 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 6 states. [2020-10-13 23:30:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:54,243 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-10-13 23:30:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:30:54,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-13 23:30:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:54,245 INFO L225 Difference]: With dead ends: 85 [2020-10-13 23:30:54,245 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:30:54,246 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 23:30:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:30:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-13 23:30:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:30:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-13 23:30:54,261 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 39 [2020-10-13 23:30:54,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:54,261 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-13 23:30:54,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:30:54,262 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-13 23:30:54,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:30:54,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:54,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:54,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:30:54,265 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash 988052424, now seen corresponding path program 3 times [2020-10-13 23:30:54,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:54,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692541371] [2020-10-13 23:30:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:54,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:54,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:55,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:59,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:30:59,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:30:59,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:30:59,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:59,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:59,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:30:59,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:59,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:30:59,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:59,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:59,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:59,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:59,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:59,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:30:59,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:59,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:59,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:59,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:59,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:59,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:30:59,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692541371] [2020-10-13 23:30:59,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:30:59,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:30:59,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505806760] [2020-10-13 23:30:59,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:30:59,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:59,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:30:59,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:30:59,345 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 5 states. [2020-10-13 23:30:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:59,450 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-10-13 23:30:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:30:59,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-13 23:30:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:59,452 INFO L225 Difference]: With dead ends: 98 [2020-10-13 23:30:59,452 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:30:59,453 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 23:30:59,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:30:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-13 23:30:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:30:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-13 23:30:59,463 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 47 [2020-10-13 23:30:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:59,464 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-13 23:30:59,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:30:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-13 23:30:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:30:59,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:59,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:59,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:30:59,466 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:59,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:59,467 INFO L82 PathProgramCache]: Analyzing trace with hash -648857754, now seen corresponding path program 4 times [2020-10-13 23:30:59,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:59,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108937740] [2020-10-13 23:30:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:59,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:01,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:04,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:31:04,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:04,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:31:04,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:04,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:04,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:31:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:04,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:04,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:04,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:04,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:04,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:04,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:04,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:04,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:04,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:04,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:04,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:04,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 23:31:04,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108937740] [2020-10-13 23:31:04,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:04,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:04,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601575167] [2020-10-13 23:31:04,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:04,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:04,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:04,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:04,544 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 7 states. [2020-10-13 23:31:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:04,710 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2020-10-13 23:31:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:04,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-13 23:31:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:04,712 INFO L225 Difference]: With dead ends: 101 [2020-10-13 23:31:04,712 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:31:04,713 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 23:31:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:31:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-13 23:31:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:31:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-13 23:31:04,720 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 49 [2020-10-13 23:31:04,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:04,721 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-13 23:31:04,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-13 23:31:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:31:04,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:04,722 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:04,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:31:04,723 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash -789665698, now seen corresponding path program 5 times [2020-10-13 23:31:04,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:04,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154224107] [2020-10-13 23:31:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:04,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:07,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:09,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:31:09,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:09,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:31:09,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:09,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:09,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:31:09,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:09,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:31:09,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:09,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:09,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:09,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:09,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:09,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:09,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:09,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:09,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:31:09,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154224107] [2020-10-13 23:31:09,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:09,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:31:09,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039444238] [2020-10-13 23:31:09,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:31:09,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:09,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:31:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:09,808 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 6 states. [2020-10-13 23:31:09,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:09,907 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-10-13 23:31:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:31:09,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-13 23:31:09,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:09,909 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:31:09,909 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 23:31:09,910 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 23:31:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 23:31:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 23:31:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:31:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-13 23:31:09,929 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 57 [2020-10-13 23:31:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:09,930 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-13 23:31:09,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:31:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-13 23:31:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:31:09,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:09,931 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:09,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:31:09,932 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:09,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1315572100, now seen corresponding path program 6 times [2020-10-13 23:31:09,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:09,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214487264] [2020-10-13 23:31:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:09,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:13,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:14,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:31:14,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:14,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:31:14,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:14,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:14,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:14,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:31:14,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:14,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:15,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:15,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:15,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:15,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:15,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:31:15,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:15,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:15,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:15,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:15,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:15,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:31:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 23:31:15,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214487264] [2020-10-13 23:31:15,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:15,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:15,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512755828] [2020-10-13 23:31:15,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:15,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:15,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:15,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:15,033 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 8 states. [2020-10-13 23:31:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:15,191 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-13 23:31:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:15,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-13 23:31:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:15,193 INFO L225 Difference]: With dead ends: 117 [2020-10-13 23:31:15,193 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:31:15,194 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 23:31:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:31:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-13 23:31:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:31:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-13 23:31:15,201 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 59 [2020-10-13 23:31:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:15,201 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-13 23:31:15,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-13 23:31:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:31:15,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:15,202 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:15,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:31:15,203 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash -89829004, now seen corresponding path program 7 times [2020-10-13 23:31:15,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:15,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524320449] [2020-10-13 23:31:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:15,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:15,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:20,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:31:20,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:20,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:31:20,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:20,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:20,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:20,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:31:20,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:20,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:20,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:20,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:20,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:20,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:20,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:20,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:20,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:20,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 23:31:20,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524320449] [2020-10-13 23:31:20,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:20,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:20,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723042785] [2020-10-13 23:31:20,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:20,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:20,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:20,319 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 9 states. [2020-10-13 23:31:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:20,505 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2020-10-13 23:31:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:20,506 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-13 23:31:20,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:20,506 INFO L225 Difference]: With dead ends: 131 [2020-10-13 23:31:20,507 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:31:20,507 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 23:31:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:31:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-10-13 23:31:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:31:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-13 23:31:20,524 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 67 [2020-10-13 23:31:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:20,524 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-13 23:31:20,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:20,525 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-13 23:31:20,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:31:20,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:20,526 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:20,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:31:20,526 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:20,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1813484652, now seen corresponding path program 8 times [2020-10-13 23:31:20,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:20,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224745996] [2020-10-13 23:31:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:20,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:20,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:25,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:31:25,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:25,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:31:25,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:25,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:25,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:25,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:25,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:25,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:25,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:25,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:25,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:25,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:25,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:25,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:25,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:25,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 23:31:25,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224745996] [2020-10-13 23:31:25,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:25,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:25,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031934012] [2020-10-13 23:31:25,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:25,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:25,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:25,641 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 7 states. [2020-10-13 23:31:25,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:25,744 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2020-10-13 23:31:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:25,745 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-13 23:31:25,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:25,746 INFO L225 Difference]: With dead ends: 150 [2020-10-13 23:31:25,746 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:31:25,747 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 23:31:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:31:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-13 23:31:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:31:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2020-10-13 23:31:25,752 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 75 [2020-10-13 23:31:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:25,753 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2020-10-13 23:31:25,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2020-10-13 23:31:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:31:25,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:25,754 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:25,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:31:25,754 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash 348051210, now seen corresponding path program 9 times [2020-10-13 23:31:25,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:25,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626953702] [2020-10-13 23:31:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:30,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:31:30,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:30,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:31:30,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:30,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:30,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:31:30,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:31:30,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:31:30,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:30,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:30,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:30,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:30,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:30,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:30,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:30,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:30,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:30,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:30,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:30,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-10-13 23:31:30,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626953702] [2020-10-13 23:31:30,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:30,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:31:30,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215044396] [2020-10-13 23:31:30,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:31:30,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:31:30,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:30,894 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 10 states. [2020-10-13 23:31:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:31,138 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-13 23:31:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:31:31,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-13 23:31:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:31,141 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:31:31,141 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:31:31,143 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 23:31:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:31:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-13 23:31:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 23:31:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-13 23:31:31,162 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 77 [2020-10-13 23:31:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:31,162 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-13 23:31:31,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:31:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-13 23:31:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 23:31:31,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:31,169 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:31,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:31:31,170 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:31,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1112966146, now seen corresponding path program 10 times [2020-10-13 23:31:31,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:31,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521147446] [2020-10-13 23:31:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:31,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:31,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:36,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:31:36,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:36,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 23:31:36,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:36,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:36,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:36,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:36,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:36,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:36,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:36,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:36,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:36,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:36,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:36,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:36,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:36,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 23:31:36,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521147446] [2020-10-13 23:31:36,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:36,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:36,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756194652] [2020-10-13 23:31:36,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:36,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:36,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:36,277 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 8 states. [2020-10-13 23:31:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:36,393 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2020-10-13 23:31:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:36,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-13 23:31:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:36,395 INFO L225 Difference]: With dead ends: 168 [2020-10-13 23:31:36,395 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:31:36,396 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 23:31:36,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:31:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 23:31:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:31:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-10-13 23:31:36,411 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 85 [2020-10-13 23:31:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:36,412 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-10-13 23:31:36,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-10-13 23:31:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:31:36,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:36,415 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:36,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:31:36,416 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1635359008, now seen corresponding path program 11 times [2020-10-13 23:31:36,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:36,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707651946] [2020-10-13 23:31:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:36,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:41,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:31:41,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:41,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:31:41,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:41,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:41,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:31:41,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:31:41,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:31:41,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:41,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:41,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:41,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:41,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:41,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:41,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:41,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:41,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:41,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-10-13 23:31:41,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707651946] [2020-10-13 23:31:41,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:41,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:31:41,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79315657] [2020-10-13 23:31:41,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:31:41,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:41,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:31:41,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:41,527 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 11 states. [2020-10-13 23:31:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:41,753 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2020-10-13 23:31:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:31:41,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-13 23:31:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:41,755 INFO L225 Difference]: With dead ends: 163 [2020-10-13 23:31:41,755 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:31:41,756 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 23:31:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:31:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-10-13 23:31:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:31:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-10-13 23:31:41,769 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 87 [2020-10-13 23:31:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:41,769 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-10-13 23:31:41,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:31:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-10-13 23:31:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 23:31:41,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:41,774 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:41,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:31:41,774 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash 969027608, now seen corresponding path program 12 times [2020-10-13 23:31:41,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:41,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485875029] [2020-10-13 23:31:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:41,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:42,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:46,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 23:31:46,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:46,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:31:46,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:46,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:46,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:46,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:46,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:46,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:46,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:46,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:46,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:46,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:46,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:46,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:46,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:46,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 23:31:46,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485875029] [2020-10-13 23:31:46,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:46,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:46,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230869767] [2020-10-13 23:31:46,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:46,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:46,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:46,869 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 9 states. [2020-10-13 23:31:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:46,961 INFO L93 Difference]: Finished difference Result 186 states and 196 transitions. [2020-10-13 23:31:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:46,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2020-10-13 23:31:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:46,963 INFO L225 Difference]: With dead ends: 186 [2020-10-13 23:31:46,964 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 23:31:46,964 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 23:31:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 23:31:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-13 23:31:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:31:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-10-13 23:31:46,971 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 95 [2020-10-13 23:31:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:46,972 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-10-13 23:31:46,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-10-13 23:31:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 23:31:46,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:46,973 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:46,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:31:46,973 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1050408886, now seen corresponding path program 13 times [2020-10-13 23:31:46,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:46,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386492789] [2020-10-13 23:31:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:46,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:52,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:31:52,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:52,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:31:52,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:52,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:52,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:31:52,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:31:52,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:31:52,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:52,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:52,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:52,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:52,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:52,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:52,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:52,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:52,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:52,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:52,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:52,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2020-10-13 23:31:52,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386492789] [2020-10-13 23:31:52,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:52,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:31:52,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044131202] [2020-10-13 23:31:52,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:31:52,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:52,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:31:52,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:31:52,108 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 12 states. [2020-10-13 23:31:52,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:52,359 INFO L93 Difference]: Finished difference Result 179 states and 191 transitions. [2020-10-13 23:31:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:31:52,360 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-10-13 23:31:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:52,361 INFO L225 Difference]: With dead ends: 179 [2020-10-13 23:31:52,361 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 23:31:52,362 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 23:31:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 23:31:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2020-10-13 23:31:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:31:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2020-10-13 23:31:52,367 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 97 [2020-10-13 23:31:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:52,367 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2020-10-13 23:31:52,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:31:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2020-10-13 23:31:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 23:31:52,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:52,368 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:52,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:31:52,368 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1514080082, now seen corresponding path program 14 times [2020-10-13 23:31:52,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:52,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999275078] [2020-10-13 23:31:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:52,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:57,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 23:31:57,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:31:57,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:31:57,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:57,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:31:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 23:31:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:31:57,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:57,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:57,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:57,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:57,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:57,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:57,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:57,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:57,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2020-10-13 23:31:57,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999275078] [2020-10-13 23:31:57,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:57,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:31:57,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218277011] [2020-10-13 23:31:57,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:31:57,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:57,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:31:57,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:31:57,495 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand 13 states. [2020-10-13 23:31:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:57,748 INFO L93 Difference]: Finished difference Result 193 states and 205 transitions. [2020-10-13 23:31:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:31:57,748 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 105 [2020-10-13 23:31:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:57,750 INFO L225 Difference]: With dead ends: 193 [2020-10-13 23:31:57,750 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 23:31:57,750 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 23:31:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 23:31:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2020-10-13 23:31:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:31:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 123 transitions. [2020-10-13 23:31:57,759 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 123 transitions. Word has length 105 [2020-10-13 23:31:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:57,760 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 123 transitions. [2020-10-13 23:31:57,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:31:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 123 transitions. [2020-10-13 23:31:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 23:31:57,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:57,762 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:57,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:31:57,762 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:57,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1635967398, now seen corresponding path program 15 times [2020-10-13 23:31:57,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:57,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081705109] [2020-10-13 23:31:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:57,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:02,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:02,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 23:32:02,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:02,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:32:02,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:02,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:02,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:32:02,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:02,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:32:02,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:02,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:02,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:02,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:02,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:02,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:02,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:02,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:02,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:02,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:02,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:02,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:02,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 23:32:02,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081705109] [2020-10-13 23:32:02,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:02,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:32:02,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490444581] [2020-10-13 23:32:02,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:32:02,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:02,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:32:02,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:02,883 INFO L87 Difference]: Start difference. First operand 118 states and 123 transitions. Second operand 10 states. [2020-10-13 23:32:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:02,973 INFO L93 Difference]: Finished difference Result 220 states and 230 transitions. [2020-10-13 23:32:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:32:02,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 113 [2020-10-13 23:32:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:02,975 INFO L225 Difference]: With dead ends: 220 [2020-10-13 23:32:02,975 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:32:02,976 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 23:32:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:32:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-13 23:32:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 23:32:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-10-13 23:32:02,982 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 113 [2020-10-13 23:32:02,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:02,982 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-10-13 23:32:02,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:32:02,982 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-10-13 23:32:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 23:32:02,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:02,984 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:02,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:32:02,984 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:02,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1556005436, now seen corresponding path program 16 times [2020-10-13 23:32:02,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:02,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877200395] [2020-10-13 23:32:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:03,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:08,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 23:32:08,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:08,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-13 23:32:08,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:08,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:32:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:32:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:32:08,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:08,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:08,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:08,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:08,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:08,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:08,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:08,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:08,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2020-10-13 23:32:08,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877200395] [2020-10-13 23:32:08,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:08,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:32:08,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351071939] [2020-10-13 23:32:08,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:32:08,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:08,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:32:08,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:08,174 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 14 states. [2020-10-13 23:32:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:08,473 INFO L93 Difference]: Finished difference Result 209 states and 221 transitions. [2020-10-13 23:32:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:32:08,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 115 [2020-10-13 23:32:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:08,475 INFO L225 Difference]: With dead ends: 209 [2020-10-13 23:32:08,476 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 23:32:08,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 23:32:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-10-13 23:32:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 23:32:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-10-13 23:32:08,483 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 115 [2020-10-13 23:32:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:08,483 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-10-13 23:32:08,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:32:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-10-13 23:32:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 23:32:08,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:08,485 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:08,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:32:08,485 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash -9367364, now seen corresponding path program 17 times [2020-10-13 23:32:08,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:08,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100746029] [2020-10-13 23:32:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:08,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:13,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 23:32:13,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:13,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-13 23:32:13,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:13,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:13,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:32:13,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:13,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:32:13,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:13,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:13,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:13,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:13,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:13,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:13,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:13,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:13,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:13,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:13,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:13,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 23:32:13,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100746029] [2020-10-13 23:32:13,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:13,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:32:13,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450638106] [2020-10-13 23:32:13,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:32:13,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:13,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:32:13,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:13,630 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 11 states. [2020-10-13 23:32:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:13,757 INFO L93 Difference]: Finished difference Result 238 states and 248 transitions. [2020-10-13 23:32:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:32:13,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 123 [2020-10-13 23:32:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:13,759 INFO L225 Difference]: With dead ends: 238 [2020-10-13 23:32:13,759 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 23:32:13,761 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 23:32:13,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 23:32:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-13 23:32:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:32:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 135 transitions. [2020-10-13 23:32:13,768 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 135 transitions. Word has length 123 [2020-10-13 23:32:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:13,768 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 135 transitions. [2020-10-13 23:32:13,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:32:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 135 transitions. [2020-10-13 23:32:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 23:32:13,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:13,770 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:13,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:32:13,770 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:13,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:13,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1320771418, now seen corresponding path program 18 times [2020-10-13 23:32:13,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:13,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682838176] [2020-10-13 23:32:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:13,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:18,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:18,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 23:32:18,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:18,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-13 23:32:18,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:18,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:18,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:32:18,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:32:18,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:32:18,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:18,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:18,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:18,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:18,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:18,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:18,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:18,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:18,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:18,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-10-13 23:32:18,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682838176] [2020-10-13 23:32:18,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:18,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:32:18,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521690576] [2020-10-13 23:32:18,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:32:18,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:18,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:32:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:18,996 INFO L87 Difference]: Start difference. First operand 130 states and 135 transitions. Second operand 15 states. [2020-10-13 23:32:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:19,255 INFO L93 Difference]: Finished difference Result 225 states and 237 transitions. [2020-10-13 23:32:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:32:19,255 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 125 [2020-10-13 23:32:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:19,257 INFO L225 Difference]: With dead ends: 225 [2020-10-13 23:32:19,257 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:32:19,258 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 23:32:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:32:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-13 23:32:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 23:32:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-10-13 23:32:19,264 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 125 [2020-10-13 23:32:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:19,264 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-10-13 23:32:19,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:32:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-10-13 23:32:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 23:32:19,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:19,266 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:19,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:32:19,267 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:19,267 INFO L82 PathProgramCache]: Analyzing trace with hash 289578066, now seen corresponding path program 19 times [2020-10-13 23:32:19,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:19,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594187360] [2020-10-13 23:32:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:19,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:24,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 23:32:24,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:24,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 23:32:24,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:24,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:32:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:32:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:32:24,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:24,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:24,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:24,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:24,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:24,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:24,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:24,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:24,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:24,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:24,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:24,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-13 23:32:24,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594187360] [2020-10-13 23:32:24,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:24,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:32:24,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809474247] [2020-10-13 23:32:24,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:32:24,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:24,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:32:24,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:24,464 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 16 states. [2020-10-13 23:32:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:24,788 INFO L93 Difference]: Finished difference Result 239 states and 251 transitions. [2020-10-13 23:32:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:32:24,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 133 [2020-10-13 23:32:24,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:24,791 INFO L225 Difference]: With dead ends: 239 [2020-10-13 23:32:24,791 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 23:32:24,792 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 23:32:24,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 23:32:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2020-10-13 23:32:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 23:32:24,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2020-10-13 23:32:24,799 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 133 [2020-10-13 23:32:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:24,799 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2020-10-13 23:32:24,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:32:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2020-10-13 23:32:24,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 23:32:24,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:24,801 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:24,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:32:24,801 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:24,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1067663030, now seen corresponding path program 20 times [2020-10-13 23:32:24,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:24,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187273890] [2020-10-13 23:32:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:24,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:26,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:29,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:29,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 23:32:29,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:29,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-13 23:32:29,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:29,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:29,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:29,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:29,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:29,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:29,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:29,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:29,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:29,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:29,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:29,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:29,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:29,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:29,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:29,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:29,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 23:32:29,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187273890] [2020-10-13 23:32:29,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:29,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:29,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582112522] [2020-10-13 23:32:29,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:29,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:29,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:29,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:29,979 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand 12 states. [2020-10-13 23:32:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:30,103 INFO L93 Difference]: Finished difference Result 272 states and 282 transitions. [2020-10-13 23:32:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:30,104 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 141 [2020-10-13 23:32:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:30,105 INFO L225 Difference]: With dead ends: 272 [2020-10-13 23:32:30,105 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 23:32:30,106 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 23:32:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 23:32:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-13 23:32:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 23:32:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2020-10-13 23:32:30,112 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 141 [2020-10-13 23:32:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:30,112 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2020-10-13 23:32:30,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2020-10-13 23:32:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 23:32:30,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:30,114 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:30,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:32:30,115 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:30,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1500126104, now seen corresponding path program 21 times [2020-10-13 23:32:30,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:30,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833728778] [2020-10-13 23:32:30,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:30,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:31,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:35,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:35,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 23:32:35,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:35,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-13 23:32:35,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:35,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:32:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 23:32:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:32:35,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:35,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:35,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:35,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:35,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:35,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:35,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:35,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:35,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:35,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-13 23:32:35,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833728778] [2020-10-13 23:32:35,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:35,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:32:35,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202415495] [2020-10-13 23:32:35,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:32:35,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:35,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:32:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:35,402 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand 17 states. [2020-10-13 23:32:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:35,750 INFO L93 Difference]: Finished difference Result 255 states and 267 transitions. [2020-10-13 23:32:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:32:35,751 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 143 [2020-10-13 23:32:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:35,753 INFO L225 Difference]: With dead ends: 255 [2020-10-13 23:32:35,753 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:32:35,754 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 23:32:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:32:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-10-13 23:32:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 23:32:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-10-13 23:32:35,761 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 143 [2020-10-13 23:32:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:35,761 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-10-13 23:32:35,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:32:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-10-13 23:32:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 23:32:35,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:35,763 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:35,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:32:35,763 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash -933563552, now seen corresponding path program 22 times [2020-10-13 23:32:35,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:35,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945371725] [2020-10-13 23:32:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:35,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:35,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:35,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:37,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:40,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:40,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 23:32:40,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:40,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:32:40,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:40,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:40,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:40,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:40,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:40,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:40,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:40,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:40,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:40,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:40,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:40,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:40,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:40,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:40,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:40,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:40,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:40,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 23:32:40,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945371725] [2020-10-13 23:32:40,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:40,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:40,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188095408] [2020-10-13 23:32:40,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:40,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:40,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:40,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:40,911 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 13 states. [2020-10-13 23:32:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:41,051 INFO L93 Difference]: Finished difference Result 290 states and 300 transitions. [2020-10-13 23:32:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:41,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 151 [2020-10-13 23:32:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:41,053 INFO L225 Difference]: With dead ends: 290 [2020-10-13 23:32:41,053 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 23:32:41,054 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 23:32:41,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 23:32:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-13 23:32:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 23:32:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 163 transitions. [2020-10-13 23:32:41,062 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 163 transitions. Word has length 151 [2020-10-13 23:32:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:41,062 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 163 transitions. [2020-10-13 23:32:41,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 163 transitions. [2020-10-13 23:32:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 23:32:41,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:41,063 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:41,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:32:41,064 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:41,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1299101442, now seen corresponding path program 23 times [2020-10-13 23:32:41,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:41,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248773290] [2020-10-13 23:32:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:41,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:41,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:41,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:46,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:46,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 23:32:46,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:46,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5174 [2020-10-13 23:32:46,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:46,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:32:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:32:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:32:46,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:46,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:46,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:46,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:46,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:46,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:46,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:46,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:46,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:46,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2020-10-13 23:32:46,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248773290] [2020-10-13 23:32:46,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:46,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:32:46,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340273018] [2020-10-13 23:32:46,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:32:46,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:46,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:32:46,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:32:46,452 INFO L87 Difference]: Start difference. First operand 158 states and 163 transitions. Second operand 18 states. [2020-10-13 23:32:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:46,812 INFO L93 Difference]: Finished difference Result 271 states and 283 transitions. [2020-10-13 23:32:46,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:32:46,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 153 [2020-10-13 23:32:46,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:46,814 INFO L225 Difference]: With dead ends: 271 [2020-10-13 23:32:46,814 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 23:32:46,815 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 23:32:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 23:32:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2020-10-13 23:32:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 23:32:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 171 transitions. [2020-10-13 23:32:46,821 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 171 transitions. Word has length 153 [2020-10-13 23:32:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:46,821 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 171 transitions. [2020-10-13 23:32:46,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:32:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 171 transitions. [2020-10-13 23:32:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 23:32:46,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:46,823 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:46,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:32:46,823 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:46,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:46,823 INFO L82 PathProgramCache]: Analyzing trace with hash -827538954, now seen corresponding path program 24 times [2020-10-13 23:32:46,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:46,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745704444] [2020-10-13 23:32:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:46,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:49,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:51,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:51,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 23:32:51,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:51,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-13 23:32:51,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:51,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:51,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:32:51,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:51,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:32:51,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:52,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:52,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:52,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:52,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:52,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:52,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:52,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:52,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:52,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 23:32:52,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745704444] [2020-10-13 23:32:52,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:52,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:32:52,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101644709] [2020-10-13 23:32:52,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:32:52,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:52,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:32:52,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:52,022 INFO L87 Difference]: Start difference. First operand 166 states and 171 transitions. Second operand 14 states. [2020-10-13 23:32:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:52,169 INFO L93 Difference]: Finished difference Result 308 states and 318 transitions. [2020-10-13 23:32:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:32:52,169 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 161 [2020-10-13 23:32:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:52,170 INFO L225 Difference]: With dead ends: 308 [2020-10-13 23:32:52,171 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 23:32:52,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 23:32:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-10-13 23:32:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 23:32:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-10-13 23:32:52,178 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 161 [2020-10-13 23:32:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:52,178 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-10-13 23:32:52,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:32:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-10-13 23:32:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 23:32:52,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:52,180 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:52,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:32:52,180 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1042077164, now seen corresponding path program 25 times [2020-10-13 23:32:52,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:52,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800841166] [2020-10-13 23:32:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:52,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:52,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:54,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:57,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:57,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 23:32:57,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:32:57,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-13 23:32:57,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:57,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:57,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:32:57,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 23:32:57,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:32:57,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:57,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:57,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:57,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:57,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:57,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:57,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:57,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:57,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:57,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2020-10-13 23:32:57,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800841166] [2020-10-13 23:32:57,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:57,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:32:57,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957496912] [2020-10-13 23:32:57,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:32:57,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:57,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:32:57,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:32:57,467 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 19 states. [2020-10-13 23:32:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:57,847 INFO L93 Difference]: Finished difference Result 287 states and 299 transitions. [2020-10-13 23:32:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:32:57,847 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 163 [2020-10-13 23:32:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:57,848 INFO L225 Difference]: With dead ends: 287 [2020-10-13 23:32:57,848 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 23:32:57,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:32:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 23:32:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2020-10-13 23:32:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 23:32:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 181 transitions. [2020-10-13 23:32:57,855 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 181 transitions. Word has length 163 [2020-10-13 23:32:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:57,855 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 181 transitions. [2020-10-13 23:32:57,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:32:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 181 transitions. [2020-10-13 23:32:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 23:32:57,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:57,857 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:57,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:32:57,857 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash -308245236, now seen corresponding path program 26 times [2020-10-13 23:32:57,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:57,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063092100] [2020-10-13 23:32:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:57,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:57,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:57,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:01,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:03,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:03,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 23:33:03,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:03,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5180 [2020-10-13 23:33:03,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:03,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:03,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:33:03,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 23:33:03,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:33:03,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:03,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:03,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:03,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:03,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:03,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:03,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:03,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:03,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:03,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1145 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2020-10-13 23:33:03,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063092100] [2020-10-13 23:33:03,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:03,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:33:03,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046870649] [2020-10-13 23:33:03,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:33:03,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:33:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:03,286 INFO L87 Difference]: Start difference. First operand 176 states and 181 transitions. Second operand 20 states. [2020-10-13 23:33:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:03,694 INFO L93 Difference]: Finished difference Result 301 states and 313 transitions. [2020-10-13 23:33:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:33:03,695 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 171 [2020-10-13 23:33:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:03,696 INFO L225 Difference]: With dead ends: 301 [2020-10-13 23:33:03,696 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 23:33:03,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 23:33:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2020-10-13 23:33:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 23:33:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 189 transitions. [2020-10-13 23:33:03,704 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 189 transitions. Word has length 171 [2020-10-13 23:33:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:03,705 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 189 transitions. [2020-10-13 23:33:03,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:33:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 189 transitions. [2020-10-13 23:33:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 23:33:03,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:03,706 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:03,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:33:03,707 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:03,707 INFO L82 PathProgramCache]: Analyzing trace with hash -475473916, now seen corresponding path program 27 times [2020-10-13 23:33:03,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:03,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932432605] [2020-10-13 23:33:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:03,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:03,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:07,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:08,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:08,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 23:33:08,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:08,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5124 [2020-10-13 23:33:08,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:08,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:08,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:33:08,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:08,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:33:08,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:08,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:08,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:08,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:08,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:08,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:08,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:08,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:08,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:08,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:08,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:08,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:08,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-13 23:33:09,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932432605] [2020-10-13 23:33:09,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:09,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:33:09,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635687848] [2020-10-13 23:33:09,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:33:09,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:09,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:33:09,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:09,030 INFO L87 Difference]: Start difference. First operand 184 states and 189 transitions. Second operand 15 states. [2020-10-13 23:33:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:09,161 INFO L93 Difference]: Finished difference Result 342 states and 352 transitions. [2020-10-13 23:33:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:33:09,162 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 179 [2020-10-13 23:33:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:09,163 INFO L225 Difference]: With dead ends: 342 [2020-10-13 23:33:09,163 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 23:33:09,164 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 23:33:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 23:33:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-10-13 23:33:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 23:33:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-10-13 23:33:09,173 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 179 [2020-10-13 23:33:09,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:09,173 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-10-13 23:33:09,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:33:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-10-13 23:33:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 23:33:09,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:09,174 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:09,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:33:09,175 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:09,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:09,175 INFO L82 PathProgramCache]: Analyzing trace with hash 118273186, now seen corresponding path program 28 times [2020-10-13 23:33:09,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:09,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321595600] [2020-10-13 23:33:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:09,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:09,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:09,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:13,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:14,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:14,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 23:33:14,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:14,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-13 23:33:14,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:14,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:14,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:33:14,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 23:33:14,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:33:14,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:14,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:14,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:14,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:14,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:14,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:14,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:14,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:14,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:14,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:14,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:14,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:14,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1011 trivial. 0 not checked. [2020-10-13 23:33:14,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321595600] [2020-10-13 23:33:14,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:14,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:33:14,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146628381] [2020-10-13 23:33:14,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:33:14,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:14,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:33:14,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:33:14,576 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 21 states. [2020-10-13 23:33:14,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:14,969 INFO L93 Difference]: Finished difference Result 317 states and 329 transitions. [2020-10-13 23:33:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:33:14,970 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 181 [2020-10-13 23:33:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:14,971 INFO L225 Difference]: With dead ends: 317 [2020-10-13 23:33:14,971 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 23:33:14,972 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 23:33:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 23:33:14,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2020-10-13 23:33:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-13 23:33:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 199 transitions. [2020-10-13 23:33:14,978 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 199 transitions. Word has length 181 [2020-10-13 23:33:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:14,978 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 199 transitions. [2020-10-13 23:33:14,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:33:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 199 transitions. [2020-10-13 23:33:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-13 23:33:14,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:14,980 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:14,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:33:14,980 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:14,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:14,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2014811750, now seen corresponding path program 29 times [2020-10-13 23:33:14,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:14,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696265240] [2020-10-13 23:33:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:15,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:15,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:15,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:18,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:20,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-13 23:33:20,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:20,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 23:33:20,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:20,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:20,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:33:20,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:20,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:33:20,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:20,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:20,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:20,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:20,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:20,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:20,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:20,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:20,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:20,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:20,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:20,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-13 23:33:20,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696265240] [2020-10-13 23:33:20,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:20,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:33:20,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185047071] [2020-10-13 23:33:20,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:33:20,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:33:20,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:20,229 INFO L87 Difference]: Start difference. First operand 194 states and 199 transitions. Second operand 16 states. [2020-10-13 23:33:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:20,372 INFO L93 Difference]: Finished difference Result 360 states and 370 transitions. [2020-10-13 23:33:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:33:20,373 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 189 [2020-10-13 23:33:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:20,374 INFO L225 Difference]: With dead ends: 360 [2020-10-13 23:33:20,374 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 23:33:20,375 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 23:33:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 23:33:20,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-10-13 23:33:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 23:33:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 201 transitions. [2020-10-13 23:33:20,385 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 201 transitions. Word has length 189 [2020-10-13 23:33:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:20,385 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 201 transitions. [2020-10-13 23:33:20,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:33:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 201 transitions. [2020-10-13 23:33:20,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 23:33:20,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:20,387 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:20,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:33:20,387 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:20,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2052036792, now seen corresponding path program 30 times [2020-10-13 23:33:20,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:20,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273267407] [2020-10-13 23:33:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:20,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:24,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:25,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 23:33:25,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:33:25,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-13 23:33:25,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:25,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:25,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:33:25,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:33:25,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:33:25,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:25,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:25,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:25,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:25,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:25,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:25,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:25,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:25,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2020-10-13 23:33:25,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273267407] [2020-10-13 23:33:25,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:25,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:33:25,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252616387] [2020-10-13 23:33:25,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:33:25,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:33:25,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:25,790 INFO L87 Difference]: Start difference. First operand 196 states and 201 transitions. Second operand 22 states. [2020-10-13 23:33:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:26,184 INFO L93 Difference]: Finished difference Result 333 states and 345 transitions. [2020-10-13 23:33:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:33:26,185 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 191 [2020-10-13 23:33:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:26,187 INFO L225 Difference]: With dead ends: 333 [2020-10-13 23:33:26,187 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 23:33:26,188 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 23:33:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 23:33:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-10-13 23:33:26,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-13 23:33:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-10-13 23:33:26,196 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 191 [2020-10-13 23:33:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:26,196 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-10-13 23:33:26,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:33:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-10-13 23:33:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-13 23:33:26,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:26,198 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:26,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:33:26,199 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1928710224, now seen corresponding path program 31 times [2020-10-13 23:33:26,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:26,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270415669] [2020-10-13 23:33:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:26,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:26,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:26,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:31,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-13 23:33:31,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:31,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5396 [2020-10-13 23:33:31,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:31,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:31,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:33:31,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:33:31,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:33:31,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:31,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:31,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:31,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:31,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:31,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:31,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:31,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:31,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:31,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:31,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:31,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1613 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1252 trivial. 0 not checked. [2020-10-13 23:33:32,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270415669] [2020-10-13 23:33:32,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:32,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:33:32,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070471710] [2020-10-13 23:33:32,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:33:32,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:32,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:33:32,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:32,050 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 23 states. [2020-10-13 23:33:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:32,553 INFO L93 Difference]: Finished difference Result 347 states and 359 transitions. [2020-10-13 23:33:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:33:32,554 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 199 [2020-10-13 23:33:32,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:32,556 INFO L225 Difference]: With dead ends: 347 [2020-10-13 23:33:32,557 INFO L226 Difference]: Without dead ends: 216 [2020-10-13 23:33:32,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-13 23:33:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2020-10-13 23:33:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 23:33:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 217 transitions. [2020-10-13 23:33:32,567 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 217 transitions. Word has length 199 [2020-10-13 23:33:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:32,567 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 217 transitions. [2020-10-13 23:33:32,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:33:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 217 transitions. [2020-10-13 23:33:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 23:33:32,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:32,569 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:32,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:33:32,570 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:32,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1291600216, now seen corresponding path program 32 times [2020-10-13 23:33:32,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:32,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755767540] [2020-10-13 23:33:32,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:32,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:32,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:32,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:37,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:37,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 23:33:37,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:37,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 23:33:37,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:37,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:37,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:33:37,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:37,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:33:37,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:37,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:37,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:37,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:37,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:37,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:37,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:37,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:37,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:37,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:37,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-13 23:33:37,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755767540] [2020-10-13 23:33:37,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:37,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:33:37,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535930394] [2020-10-13 23:33:37,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:33:37,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:33:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:33:37,863 INFO L87 Difference]: Start difference. First operand 212 states and 217 transitions. Second operand 17 states. [2020-10-13 23:33:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:38,039 INFO L93 Difference]: Finished difference Result 394 states and 404 transitions. [2020-10-13 23:33:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:33:38,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 207 [2020-10-13 23:33:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:38,041 INFO L225 Difference]: With dead ends: 394 [2020-10-13 23:33:38,041 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 23:33:38,042 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 23:33:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 23:33:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2020-10-13 23:33:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 23:33:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 219 transitions. [2020-10-13 23:33:38,049 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 219 transitions. Word has length 207 [2020-10-13 23:33:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:38,049 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 219 transitions. [2020-10-13 23:33:38,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:33:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 219 transitions. [2020-10-13 23:33:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 23:33:38,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:38,051 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:38,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:33:38,051 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:38,052 INFO L82 PathProgramCache]: Analyzing trace with hash -611016122, now seen corresponding path program 33 times [2020-10-13 23:33:38,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:38,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587288055] [2020-10-13 23:33:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:38,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:38,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:38,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:43,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-13 23:33:43,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:43,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 23:33:43,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:43,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:33:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:33:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:33:43,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:43,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:43,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:43,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:43,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:43,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:43,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:43,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:43,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1796 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1396 trivial. 0 not checked. [2020-10-13 23:33:43,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587288055] [2020-10-13 23:33:43,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:43,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:33:43,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815438558] [2020-10-13 23:33:43,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:33:43,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:43,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:33:43,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:33:43,449 INFO L87 Difference]: Start difference. First operand 214 states and 219 transitions. Second operand 24 states. [2020-10-13 23:33:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:43,948 INFO L93 Difference]: Finished difference Result 363 states and 375 transitions. [2020-10-13 23:33:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:33:43,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2020-10-13 23:33:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:43,950 INFO L225 Difference]: With dead ends: 363 [2020-10-13 23:33:43,951 INFO L226 Difference]: Without dead ends: 226 [2020-10-13 23:33:43,952 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 23:33:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-13 23:33:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-10-13 23:33:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 23:33:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-10-13 23:33:43,959 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 209 [2020-10-13 23:33:43,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:43,960 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-10-13 23:33:43,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:33:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-10-13 23:33:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-13 23:33:43,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:43,961 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:43,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:33:43,962 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:43,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1499370302, now seen corresponding path program 34 times [2020-10-13 23:33:43,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:43,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022006359] [2020-10-13 23:33:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:43,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:44,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:44,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:49,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-13 23:33:49,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:49,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5297 [2020-10-13 23:33:49,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:49,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:49,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:33:49,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:49,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:33:49,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:49,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:49,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:49,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:49,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:49,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:49,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:49,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:49,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:49,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:49,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-10-13 23:33:49,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022006359] [2020-10-13 23:33:49,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:49,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:33:49,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664576421] [2020-10-13 23:33:49,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:33:49,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:49,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:33:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:33:49,493 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 18 states. [2020-10-13 23:33:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:49,662 INFO L93 Difference]: Finished difference Result 412 states and 422 transitions. [2020-10-13 23:33:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:33:49,663 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 217 [2020-10-13 23:33:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:49,664 INFO L225 Difference]: With dead ends: 412 [2020-10-13 23:33:49,664 INFO L226 Difference]: Without dead ends: 225 [2020-10-13 23:33:49,665 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 23:33:49,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-13 23:33:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2020-10-13 23:33:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-13 23:33:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 229 transitions. [2020-10-13 23:33:49,680 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 229 transitions. Word has length 217 [2020-10-13 23:33:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:49,681 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 229 transitions. [2020-10-13 23:33:49,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:33:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 229 transitions. [2020-10-13 23:33:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-13 23:33:49,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:49,683 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:49,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:33:49,683 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1114240676, now seen corresponding path program 35 times [2020-10-13 23:33:49,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:49,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755965256] [2020-10-13 23:33:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:49,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:49,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:54,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:54,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-13 23:33:54,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:33:54,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-13 23:33:54,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:54,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:54,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:33:54,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:33:54,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:33:54,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:55,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:55,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:55,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:55,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:55,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:55,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:55,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:55,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:55,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:55,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:55,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1548 trivial. 0 not checked. [2020-10-13 23:33:55,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755965256] [2020-10-13 23:33:55,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:55,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:33:55,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707652044] [2020-10-13 23:33:55,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:33:55,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:33:55,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:33:55,243 INFO L87 Difference]: Start difference. First operand 224 states and 229 transitions. Second operand 25 states. [2020-10-13 23:33:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:55,723 INFO L93 Difference]: Finished difference Result 379 states and 391 transitions. [2020-10-13 23:33:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:33:55,723 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 219 [2020-10-13 23:33:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:55,725 INFO L225 Difference]: With dead ends: 379 [2020-10-13 23:33:55,726 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 23:33:55,727 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 23:33:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 23:33:55,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2020-10-13 23:33:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:33:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 237 transitions. [2020-10-13 23:33:55,737 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 237 transitions. Word has length 219 [2020-10-13 23:33:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:55,738 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 237 transitions. [2020-10-13 23:33:55,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:33:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 237 transitions. [2020-10-13 23:33:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 23:33:55,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:55,741 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:55,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:33:55,741 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:55,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1811670100, now seen corresponding path program 36 times [2020-10-13 23:33:55,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:55,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665822855] [2020-10-13 23:33:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:55,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:56,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:00,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 23:34:00,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:00,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 23:34:00,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:00,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:34:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:00,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:34:00,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:01,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:01,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:01,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:01,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:01,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:01,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:01,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:01,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:01,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:01,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2161 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2020-10-13 23:34:01,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665822855] [2020-10-13 23:34:01,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:01,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:34:01,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688910900] [2020-10-13 23:34:01,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:34:01,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:01,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:34:01,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:01,059 INFO L87 Difference]: Start difference. First operand 232 states and 237 transitions. Second operand 19 states. [2020-10-13 23:34:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:01,229 INFO L93 Difference]: Finished difference Result 430 states and 440 transitions. [2020-10-13 23:34:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:34:01,229 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 227 [2020-10-13 23:34:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:01,231 INFO L225 Difference]: With dead ends: 430 [2020-10-13 23:34:01,231 INFO L226 Difference]: Without dead ends: 235 [2020-10-13 23:34:01,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-13 23:34:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2020-10-13 23:34:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-13 23:34:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-10-13 23:34:01,239 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 227 [2020-10-13 23:34:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:01,239 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-10-13 23:34:01,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:34:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-10-13 23:34:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-13 23:34:01,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:01,241 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:01,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:34:01,242 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash 346344690, now seen corresponding path program 37 times [2020-10-13 23:34:01,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:01,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182030024] [2020-10-13 23:34:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:01,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:06,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-13 23:34:06,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:06,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5199 [2020-10-13 23:34:06,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:06,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:06,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:34:06,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:34:06,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:34:06,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:06,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:06,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:06,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:06,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:06,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:06,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:06,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:06,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:06,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:06,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:06,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2192 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1708 trivial. 0 not checked. [2020-10-13 23:34:06,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182030024] [2020-10-13 23:34:06,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:06,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:34:06,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934447444] [2020-10-13 23:34:06,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:34:06,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:06,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:34:06,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:06,831 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 26 states. [2020-10-13 23:34:07,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:07,316 INFO L93 Difference]: Finished difference Result 395 states and 407 transitions. [2020-10-13 23:34:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:34:07,317 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 229 [2020-10-13 23:34:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:07,319 INFO L225 Difference]: With dead ends: 395 [2020-10-13 23:34:07,319 INFO L226 Difference]: Without dead ends: 246 [2020-10-13 23:34:07,320 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 23:34:07,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-13 23:34:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242. [2020-10-13 23:34:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-13 23:34:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 247 transitions. [2020-10-13 23:34:07,327 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 247 transitions. Word has length 229 [2020-10-13 23:34:07,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:07,327 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 247 transitions. [2020-10-13 23:34:07,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:34:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 247 transitions. [2020-10-13 23:34:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-13 23:34:07,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:07,329 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:07,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:34:07,329 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:07,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:07,330 INFO L82 PathProgramCache]: Analyzing trace with hash -233696790, now seen corresponding path program 38 times [2020-10-13 23:34:07,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:07,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564259607] [2020-10-13 23:34:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:07,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:12,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-13 23:34:12,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:12,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-13 23:34:12,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:12,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:12,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:34:12,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 23:34:12,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:34:12,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:12,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:12,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:12,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:12,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:12,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:12,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:12,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:12,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:12,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:12,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2372 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1843 trivial. 0 not checked. [2020-10-13 23:34:12,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564259607] [2020-10-13 23:34:12,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:12,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:34:12,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477215824] [2020-10-13 23:34:12,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:34:12,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:12,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:34:12,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:34:12,917 INFO L87 Difference]: Start difference. First operand 242 states and 247 transitions. Second operand 27 states. [2020-10-13 23:34:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:13,485 INFO L93 Difference]: Finished difference Result 409 states and 421 transitions. [2020-10-13 23:34:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:34:13,486 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 237 [2020-10-13 23:34:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:13,488 INFO L225 Difference]: With dead ends: 409 [2020-10-13 23:34:13,488 INFO L226 Difference]: Without dead ends: 254 [2020-10-13 23:34:13,489 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 23:34:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-13 23:34:13,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2020-10-13 23:34:13,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-13 23:34:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 255 transitions. [2020-10-13 23:34:13,496 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 255 transitions. Word has length 237 [2020-10-13 23:34:13,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:13,496 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 255 transitions. [2020-10-13 23:34:13,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:34:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 255 transitions. [2020-10-13 23:34:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-13 23:34:13,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:13,498 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:13,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:34:13,499 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:13,499 INFO L82 PathProgramCache]: Analyzing trace with hash 301481698, now seen corresponding path program 39 times [2020-10-13 23:34:13,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:13,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272895301] [2020-10-13 23:34:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:13,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:13,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:18,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:18,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-13 23:34:18,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:18,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:34:18,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:18,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:34:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:34:18,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:18,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:18,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:18,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:18,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:18,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:18,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:18,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:18,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:18,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:18,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:18,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:18,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2020-10-13 23:34:18,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272895301] [2020-10-13 23:34:18,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:18,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:34:18,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873259666] [2020-10-13 23:34:18,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:34:18,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:18,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:34:18,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:34:18,781 INFO L87 Difference]: Start difference. First operand 250 states and 255 transitions. Second operand 20 states. [2020-10-13 23:34:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:18,931 INFO L93 Difference]: Finished difference Result 464 states and 474 transitions. [2020-10-13 23:34:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:34:18,931 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 245 [2020-10-13 23:34:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:18,933 INFO L225 Difference]: With dead ends: 464 [2020-10-13 23:34:18,933 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 23:34:18,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:34:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 23:34:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2020-10-13 23:34:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-13 23:34:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-10-13 23:34:18,942 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 245 [2020-10-13 23:34:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:18,942 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-10-13 23:34:18,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:34:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-10-13 23:34:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-13 23:34:18,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:18,944 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:18,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:34:18,944 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash 945781760, now seen corresponding path program 40 times [2020-10-13 23:34:18,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:18,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808339912] [2020-10-13 23:34:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:18,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:19,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:24,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-13 23:34:24,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:24,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5170 [2020-10-13 23:34:24,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:24,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:24,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:34:24,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:34:24,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:34:24,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:24,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:24,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:24,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:24,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:24,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:24,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:24,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:24,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:24,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2593 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2017 trivial. 0 not checked. [2020-10-13 23:34:24,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808339912] [2020-10-13 23:34:24,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:24,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:34:24,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034918782] [2020-10-13 23:34:24,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:34:24,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:24,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:34:24,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:34:24,562 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 28 states. [2020-10-13 23:34:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:25,134 INFO L93 Difference]: Finished difference Result 425 states and 437 transitions. [2020-10-13 23:34:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:34:25,134 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 247 [2020-10-13 23:34:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:25,136 INFO L225 Difference]: With dead ends: 425 [2020-10-13 23:34:25,136 INFO L226 Difference]: Without dead ends: 264 [2020-10-13 23:34:25,137 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 23:34:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-13 23:34:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2020-10-13 23:34:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-13 23:34:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 265 transitions. [2020-10-13 23:34:25,147 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 265 transitions. Word has length 247 [2020-10-13 23:34:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:25,149 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 265 transitions. [2020-10-13 23:34:25,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:34:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 265 transitions. [2020-10-13 23:34:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-13 23:34:25,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:25,152 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:25,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:34:25,152 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:25,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:25,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2078371080, now seen corresponding path program 41 times [2020-10-13 23:34:25,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:25,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265259960] [2020-10-13 23:34:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:25,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:25,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:30,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:30,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-13 23:34:30,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:30,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 23:34:30,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:30,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:34:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:34:30,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:30,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:30,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:30,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:30,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:30,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:30,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:30,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:30,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:30,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2789 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2020-10-13 23:34:30,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265259960] [2020-10-13 23:34:30,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:30,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:34:30,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093698208] [2020-10-13 23:34:30,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:34:30,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:30,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:34:30,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:34:30,473 INFO L87 Difference]: Start difference. First operand 260 states and 265 transitions. Second operand 21 states. [2020-10-13 23:34:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:30,631 INFO L93 Difference]: Finished difference Result 482 states and 492 transitions. [2020-10-13 23:34:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:34:30,631 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 255 [2020-10-13 23:34:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:30,633 INFO L225 Difference]: With dead ends: 482 [2020-10-13 23:34:30,633 INFO L226 Difference]: Without dead ends: 263 [2020-10-13 23:34:30,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:34:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-13 23:34:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2020-10-13 23:34:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 23:34:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 267 transitions. [2020-10-13 23:34:30,641 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 267 transitions. Word has length 255 [2020-10-13 23:34:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:30,641 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 267 transitions. [2020-10-13 23:34:30,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:34:30,641 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 267 transitions. [2020-10-13 23:34:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-13 23:34:30,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:30,643 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:30,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:34:30,643 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:30,644 INFO L82 PathProgramCache]: Analyzing trace with hash 120226454, now seen corresponding path program 42 times [2020-10-13 23:34:30,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:30,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857509821] [2020-10-13 23:34:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:30,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking...