/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_copyInitSum_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:34:30,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:34:30,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:34:30,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:34:30,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:34:30,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:34:30,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:34:30,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:34:30,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:34:30,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:34:30,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:34:30,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:34:30,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:34:30,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:34:30,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:34:30,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:34:30,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:34:30,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:34:30,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:34:30,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:34:30,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:34:30,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:34:30,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:34:30,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:34:30,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:34:30,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:34:30,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:34:30,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:34:30,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:34:30,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:34:30,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:34:30,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:34:30,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:34:30,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:34:30,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:34:30,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:34:30,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:34:30,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:34:30,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:34:30,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:34:30,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:34:30,953 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:34:30,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:34:30,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:34:30,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:34:30,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:34:30,978 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:34:30,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:34:30,979 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:34:30,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:34:30,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:34:30,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:34:30,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:34:30,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:34:30,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:34:30,980 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:34:30,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:34:30,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:34:30,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:34:30,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:34:30,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:34:30,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:34:30,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:34:30,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:34:30,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:34:30,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:34:30,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:34:30,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:34:30,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:34:30,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:34:30,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:34:30,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:34:31,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:34:31,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:34:31,319 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:34:31,321 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:34:31,322 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:34:31,322 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2020-10-13 23:34:31,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/200caca82/3338f2ad7dcc4ce692d7e6a02f7d8029/FLAG445c1b8f0 [2020-10-13 23:34:31,792 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:34:31,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2020-10-13 23:34:31,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/200caca82/3338f2ad7dcc4ce692d7e6a02f7d8029/FLAG445c1b8f0 [2020-10-13 23:34:32,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/200caca82/3338f2ad7dcc4ce692d7e6a02f7d8029 [2020-10-13 23:34:32,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:34:32,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:34:32,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:34:32,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:34:32,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:34:32,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:34:32" (1/1) ... [2020-10-13 23:34:32,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb5ca15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32, skipping insertion in model container [2020-10-13 23:34:32,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:34:32" (1/1) ... [2020-10-13 23:34:32,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:34:32,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:34:32,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:34:32,395 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:34:32,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:34:32,435 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:34:32,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32 WrapperNode [2020-10-13 23:34:32,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:34:32,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:34:32,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:34:32,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:34:32,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32" (1/1) ... [2020-10-13 23:34:32,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32" (1/1) ... [2020-10-13 23:34:32,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32" (1/1) ... [2020-10-13 23:34:32,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32" (1/1) ... [2020-10-13 23:34:32,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32" (1/1) ... [2020-10-13 23:34:32,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32" (1/1) ... [2020-10-13 23:34:32,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32" (1/1) ... [2020-10-13 23:34:32,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:34:32,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:34:32,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:34:32,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:34:32,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:34:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:34:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:34:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:34:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:34:32,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:34:32,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:34:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:34:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:34:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:34:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:34:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:34:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:34:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:34:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:34:32,906 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:34:32,906 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:34:32,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:34:32 BoogieIcfgContainer [2020-10-13 23:34:32,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:34:32,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:34:32,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:34:32,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:34:32,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:34:32" (1/3) ... [2020-10-13 23:34:32,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c80d874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:34:32, skipping insertion in model container [2020-10-13 23:34:32,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:34:32" (2/3) ... [2020-10-13 23:34:32,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c80d874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:34:32, skipping insertion in model container [2020-10-13 23:34:32,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:34:32" (3/3) ... [2020-10-13 23:34:32,920 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2020-10-13 23:34:32,933 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:34:32,941 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:34:32,958 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:34:32,990 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:34:32,990 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:34:32,990 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:34:32,990 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:34:32,991 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:34:32,991 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:34:32,991 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:34:32,991 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:34:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-13 23:34:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:34:33,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:33,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:33,022 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:33,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:33,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2020-10-13 23:34:33,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:33,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844602007] [2020-10-13 23:34:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:33,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:33,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:33,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:33,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:33,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:34:33,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:33,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-13 23:34:33,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:33,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:33,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:34:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:33,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 23:34:33,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:33,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:33,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:33,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:33,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:33,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:34:33,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:33,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:33,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:33,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:33,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:33,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:33,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844602007] [2020-10-13 23:34:33,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:34:33,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:34:33,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550819887] [2020-10-13 23:34:33,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:34:33,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:34:33,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:34:33,680 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-13 23:34:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:33,804 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-10-13 23:34:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:34:33,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 23:34:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:33,816 INFO L225 Difference]: With dead ends: 51 [2020-10-13 23:34:33,816 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 23:34:33,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:34:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 23:34:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 23:34:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:34:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-13 23:34:33,865 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2020-10-13 23:34:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:33,866 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-13 23:34:33,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:34:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-13 23:34:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 23:34:33,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:33,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:33,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:34:33,868 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash -400143846, now seen corresponding path program 1 times [2020-10-13 23:34:33,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:33,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359290847] [2020-10-13 23:34:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:33,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:33,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:34,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:34,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 23:34:34,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:34,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-13 23:34:34,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:34,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:34:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 23:34:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:34:34,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:34:34,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:34,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:34,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:34,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:34,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:34,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:34:34,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:34,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:34,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:34:34,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359290847] [2020-10-13 23:34:34,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:34:34,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:34:34,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671185733] [2020-10-13 23:34:34,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:34:34,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:34:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:34:34,286 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-13 23:34:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:34,393 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-13 23:34:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:34:34,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 23:34:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:34,395 INFO L225 Difference]: With dead ends: 46 [2020-10-13 23:34:34,395 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:34:34,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:34:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:34:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-13 23:34:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:34:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-13 23:34:34,405 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-13 23:34:34,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:34,405 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-13 23:34:34,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:34:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-13 23:34:34,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:34:34,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:34,406 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] [2020-10-13 23:34:34,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:34:34,407 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:34,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2020-10-13 23:34:34,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:34,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053509730] [2020-10-13 23:34:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:34,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:34,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:34,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:34,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:35,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:34:35,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:34:35,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-13 23:34:35,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:35,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:34:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 23:34:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:34:35,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:35,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:35,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:35,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:35,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:35,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:35,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:35,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:35,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:35,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:35,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:35,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:34:35,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053509730] [2020-10-13 23:34:35,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:35,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:34:35,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177156012] [2020-10-13 23:34:35,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:34:35,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:35,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:34:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:34:35,186 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-13 23:34:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:35,282 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-13 23:34:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:34:35,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 23:34:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:35,283 INFO L225 Difference]: With dead ends: 53 [2020-10-13 23:34:35,284 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:34:35,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:34:35,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:34:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-13 23:34:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:34:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-13 23:34:35,292 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2020-10-13 23:34:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:35,292 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-13 23:34:35,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:34:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-13 23:34:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:34:35,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:35,294 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:35,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:34:35,294 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:35,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1868122094, now seen corresponding path program 2 times [2020-10-13 23:34:35,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:35,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381597730] [2020-10-13 23:34:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:35,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:36,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:37,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:37,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:37,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:34:37,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:37,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2466 [2020-10-13 23:34:37,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:37,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:37,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:34:37,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:34:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:34:37,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 23:34:37,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:37,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:37,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:37,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:37,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:37,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:34:37,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:37,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:37,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:37,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:37,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:37,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:34:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 23:34:37,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381597730] [2020-10-13 23:34:37,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:37,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:34:37,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309005026] [2020-10-13 23:34:37,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:34:37,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:37,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:34:37,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:34:37,868 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-10-13 23:34:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:38,037 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-13 23:34:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:34:38,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 23:34:38,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:38,040 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:34:38,041 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:34:38,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:34:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:34:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-13 23:34:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:34:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 23:34:38,058 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2020-10-13 23:34:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:38,059 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 23:34:38,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:34:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 23:34:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:34:38,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:38,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:38,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:34:38,063 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:38,064 INFO L82 PathProgramCache]: Analyzing trace with hash 150752210, now seen corresponding path program 3 times [2020-10-13 23:34:38,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:38,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118224156] [2020-10-13 23:34:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:38,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:38,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:38,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:40,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:42,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:43,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:34:43,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:34:43,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:34:43,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:43,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:43,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:34:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:34:43,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:34:43,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:43,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:43,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:43,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:43,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:43,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:34:43,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:43,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:43,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:43,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:43,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:43,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:34:43,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118224156] [2020-10-13 23:34:43,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:43,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:34:43,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417001339] [2020-10-13 23:34:43,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:34:43,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:43,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:34:43,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:34:43,212 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 7 states. [2020-10-13 23:34:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:43,400 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-10-13 23:34:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:34:43,401 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-13 23:34:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:43,402 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:34:43,403 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:34:43,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:34:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:34:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-13 23:34:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:34:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 23:34:43,422 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2020-10-13 23:34:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:43,422 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 23:34:43,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:34:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 23:34:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:34:43,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:43,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:43,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:34:43,428 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:43,428 INFO L82 PathProgramCache]: Analyzing trace with hash -125121014, now seen corresponding path program 4 times [2020-10-13 23:34:43,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:43,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784901356] [2020-10-13 23:34:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:43,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:43,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:47,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:48,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:48,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:48,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:34:48,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:48,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5196 [2020-10-13 23:34:48,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:48,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:34:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:34:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:34:48,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:48,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:48,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:48,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:48,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:48,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:48,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:48,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:48,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:48,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:48,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:48,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:48,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-13 23:34:48,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784901356] [2020-10-13 23:34:48,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:48,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:34:48,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173356062] [2020-10-13 23:34:48,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:34:48,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:48,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:34:48,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:34:48,743 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-10-13 23:34:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:48,909 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-13 23:34:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:34:48,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-13 23:34:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:48,911 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:34:48,912 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:34:48,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:34:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:34:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-13 23:34:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:34:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-13 23:34:48,920 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2020-10-13 23:34:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:48,920 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-13 23:34:48,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:34:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-13 23:34:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:34:48,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:48,922 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:48,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:34:48,922 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:48,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:48,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1558523702, now seen corresponding path program 5 times [2020-10-13 23:34:48,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:48,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603662253] [2020-10-13 23:34:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:48,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:48,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:49,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:53,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:53,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:34:53,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:53,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:34:53,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:53,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:53,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:34:53,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:34:53,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:34:53,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:54,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:54,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:54,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:54,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:54,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:54,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:34:54,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:54,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:54,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:54,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:54,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:54,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 23:34:54,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603662253] [2020-10-13 23:34:54,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:54,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:34:54,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285439019] [2020-10-13 23:34:54,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:34:54,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:54,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:34:54,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:34:54,040 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 9 states. [2020-10-13 23:34:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:54,194 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-10-13 23:34:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:34:54,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-13 23:34:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:54,195 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:34:54,196 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:34:54,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:34:54,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:34:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-13 23:34:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:34:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 23:34:54,210 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2020-10-13 23:34:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:54,212 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 23:34:54,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:34:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 23:34:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:34:54,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:54,214 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:54,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:34:54,214 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:54,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1349350398, now seen corresponding path program 6 times [2020-10-13 23:34:54,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:54,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635571902] [2020-10-13 23:34:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:54,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:54,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:59,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:59,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:34:59,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:34:59,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:34:59,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:59,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:59,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:34:59,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:34:59,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:34:59,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:59,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:59,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:59,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:59,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:59,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:59,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:59,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:59,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:59,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:59,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:59,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:59,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 23:34:59,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635571902] [2020-10-13 23:34:59,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:59,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:34:59,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301856405] [2020-10-13 23:34:59,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:34:59,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:34:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:34:59,349 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 10 states. [2020-10-13 23:34:59,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:59,508 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-13 23:34:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:34:59,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-13 23:34:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:59,510 INFO L225 Difference]: With dead ends: 98 [2020-10-13 23:34:59,510 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:34:59,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:34:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:34:59,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-13 23:34:59,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 23:34:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-13 23:34:59,517 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2020-10-13 23:34:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:59,518 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-13 23:34:59,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:34:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-13 23:34:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:34:59,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:59,519 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:59,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:34:59,520 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:59,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:59,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1128841790, now seen corresponding path program 7 times [2020-10-13 23:34:59,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:59,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319673709] [2020-10-13 23:34:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:59,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:59,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:59,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:04,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:35:04,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:04,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:35:04,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:04,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:04,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:35:04,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 23:35:04,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:35:04,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:04,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:04,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:04,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:04,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:04,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:04,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:04,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:04,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:04,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:04,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:04,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-13 23:35:04,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319673709] [2020-10-13 23:35:04,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:04,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:35:04,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346495043] [2020-10-13 23:35:04,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:35:04,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:04,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:35:04,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:35:04,652 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 11 states. [2020-10-13 23:35:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:04,787 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2020-10-13 23:35:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:35:04,788 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-13 23:35:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:04,788 INFO L225 Difference]: With dead ends: 107 [2020-10-13 23:35:04,789 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:35:04,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:35:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:35:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-13 23:35:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:35:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-13 23:35:04,795 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2020-10-13 23:35:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:04,796 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-13 23:35:04,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:35:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-13 23:35:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:35:04,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:04,797 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:04,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:35:04,798 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:04,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:04,798 INFO L82 PathProgramCache]: Analyzing trace with hash -612503046, now seen corresponding path program 8 times [2020-10-13 23:35:04,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:04,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508219288] [2020-10-13 23:35:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:04,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:04,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:05,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:09,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:09,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:35:09,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:09,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:35:09,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:09,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:09,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:35:09,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:35:09,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:35:09,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:09,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:09,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:09,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:09,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:09,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:09,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:35:09,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:09,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:09,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:35:09,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508219288] [2020-10-13 23:35:09,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:09,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:35:09,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560872333] [2020-10-13 23:35:09,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:35:09,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:09,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:35:09,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:35:09,935 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 12 states. [2020-10-13 23:35:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:10,076 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-13 23:35:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:35:10,077 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-13 23:35:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:10,078 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:35:10,078 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:35:10,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:35:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:35:10,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-13 23:35:10,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:35:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-13 23:35:10,089 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2020-10-13 23:35:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:10,089 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-13 23:35:10,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:35:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-13 23:35:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:35:10,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:10,091 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:10,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:35:10,091 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash -490630470, now seen corresponding path program 9 times [2020-10-13 23:35:10,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:10,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958077672] [2020-10-13 23:35:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:10,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:10,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:15,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:15,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:35:15,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:15,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:35:15,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:15,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:35:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:35:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:35:15,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:15,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:15,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:15,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:15,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:15,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:15,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:15,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:15,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:15,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:15,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:15,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:15,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-13 23:35:15,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958077672] [2020-10-13 23:35:15,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:15,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:35:15,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659430589] [2020-10-13 23:35:15,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:35:15,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:35:15,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:35:15,227 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 13 states. [2020-10-13 23:35:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:15,373 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-13 23:35:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:35:15,374 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-13 23:35:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:15,375 INFO L225 Difference]: With dead ends: 125 [2020-10-13 23:35:15,375 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:35:15,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:35:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:35:15,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-13 23:35:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:35:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-13 23:35:15,385 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 62 [2020-10-13 23:35:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:15,386 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-13 23:35:15,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:35:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-13 23:35:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:35:15,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:15,387 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:15,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:35:15,387 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:15,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1207107598, now seen corresponding path program 10 times [2020-10-13 23:35:15,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:15,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778730613] [2020-10-13 23:35:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:15,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:15,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:15,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:20,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:20,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:35:20,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:20,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:35:20,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:20,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:20,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:35:20,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:35:20,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:35:20,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:20,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:20,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:20,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:20,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:20,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:20,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:20,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:20,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:20,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:20,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:20,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:20,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-13 23:35:20,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778730613] [2020-10-13 23:35:20,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:20,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:35:20,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543697176] [2020-10-13 23:35:20,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:35:20,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:20,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:35:20,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:35:20,538 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 14 states. [2020-10-13 23:35:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:20,742 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-13 23:35:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:35:20,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-13 23:35:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:20,744 INFO L225 Difference]: With dead ends: 134 [2020-10-13 23:35:20,744 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:35:20,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:35:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:35:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-13 23:35:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 23:35:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-13 23:35:20,751 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2020-10-13 23:35:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:20,751 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-13 23:35:20,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:35:20,751 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-13 23:35:20,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:35:20,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:20,752 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:20,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:35:20,753 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash 2083114930, now seen corresponding path program 11 times [2020-10-13 23:35:20,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:20,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317797] [2020-10-13 23:35:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:20,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:20,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:21,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:25,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:25,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:35:25,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:25,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:35:25,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:25,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:25,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:35:25,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:35:25,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:35:25,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:25,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:25,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:25,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:25,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:25,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:25,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:25,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:25,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:25,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:25,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:25,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:25,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-13 23:35:25,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317797] [2020-10-13 23:35:25,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:25,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:35:25,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045218690] [2020-10-13 23:35:25,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:35:25,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:25,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:35:25,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:35:25,937 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 15 states. [2020-10-13 23:35:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:26,159 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2020-10-13 23:35:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:35:26,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2020-10-13 23:35:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:26,161 INFO L225 Difference]: With dead ends: 143 [2020-10-13 23:35:26,161 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:35:26,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:35:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:35:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-13 23:35:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:35:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 23:35:26,169 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2020-10-13 23:35:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:26,173 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 23:35:26,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:35:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 23:35:26,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 23:35:26,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:26,176 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:26,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:35:26,176 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:26,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:26,176 INFO L82 PathProgramCache]: Analyzing trace with hash 385857002, now seen corresponding path program 12 times [2020-10-13 23:35:26,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:26,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191212044] [2020-10-13 23:35:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:26,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:26,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:31,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:31,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:35:31,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:35:31,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 23:35:31,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:31,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:31,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:35:31,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:35:31,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:35:31,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:31,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:31,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:31,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:31,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:31,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:31,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:31,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:31,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:31,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-13 23:35:31,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191212044] [2020-10-13 23:35:31,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:31,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:35:31,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553065990] [2020-10-13 23:35:31,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:35:31,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:31,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:35:31,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:35:31,377 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 16 states. [2020-10-13 23:35:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:31,604 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2020-10-13 23:35:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:35:31,605 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-13 23:35:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:31,606 INFO L225 Difference]: With dead ends: 152 [2020-10-13 23:35:31,606 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 23:35:31,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:35:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 23:35:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-13 23:35:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 23:35:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-10-13 23:35:31,614 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 77 [2020-10-13 23:35:31,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:31,615 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-10-13 23:35:31,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:35:31,615 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-10-13 23:35:31,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:35:31,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:31,616 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:31,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:35:31,616 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:31,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1239413930, now seen corresponding path program 13 times [2020-10-13 23:35:31,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:31,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868141931] [2020-10-13 23:35:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:31,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:31,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:36,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:36,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:35:36,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:36,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:35:36,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:36,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:35:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:35:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:35:36,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:36,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:36,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:36,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:36,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:36,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:36,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:36,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:36,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:36,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:36,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:36,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:36,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-13 23:35:36,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868141931] [2020-10-13 23:35:36,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:36,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:35:36,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629264271] [2020-10-13 23:35:36,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:35:36,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:36,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:35:36,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:35:36,845 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 17 states. [2020-10-13 23:35:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:37,164 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2020-10-13 23:35:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:35:37,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-13 23:35:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:37,166 INFO L225 Difference]: With dead ends: 161 [2020-10-13 23:35:37,166 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:35:37,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:35:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:35:37,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-13 23:35:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:35:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-13 23:35:37,185 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 82 [2020-10-13 23:35:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:37,186 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-13 23:35:37,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:35:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-13 23:35:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:35:37,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:37,193 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:37,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:35:37,193 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash -535424030, now seen corresponding path program 14 times [2020-10-13 23:35:37,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:37,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083613324] [2020-10-13 23:35:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:37,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:37,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:42,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:42,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:35:42,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:42,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:35:42,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:42,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:42,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:35:42,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:35:42,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:35:42,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:42,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:42,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:42,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:42,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:42,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:42,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:42,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:42,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:42,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:35:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-13 23:35:42,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083613324] [2020-10-13 23:35:42,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:42,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:35:42,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646531017] [2020-10-13 23:35:42,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:35:42,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:42,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:35:42,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:35:42,449 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 18 states. [2020-10-13 23:35:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:42,713 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2020-10-13 23:35:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:35:42,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-10-13 23:35:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:42,715 INFO L225 Difference]: With dead ends: 170 [2020-10-13 23:35:42,715 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:35:42,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:35:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:35:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-13 23:35:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 23:35:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-13 23:35:42,729 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 87 [2020-10-13 23:35:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:42,730 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-13 23:35:42,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:35:42,731 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-13 23:35:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:35:42,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:42,732 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:42,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:35:42,733 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:42,733 INFO L82 PathProgramCache]: Analyzing trace with hash -422313566, now seen corresponding path program 15 times [2020-10-13 23:35:42,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:42,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096394734] [2020-10-13 23:35:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:42,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:42,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:47,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:47,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:35:47,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:35:47,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:47,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:35:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:35:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:35:47,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:47,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:47,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:47,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:47,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:47,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:47,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:35:47,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:47,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:47,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:47,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-13 23:35:48,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096394734] [2020-10-13 23:35:48,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:48,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:35:48,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270114392] [2020-10-13 23:35:48,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:35:48,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:35:48,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:35:48,016 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 19 states. [2020-10-13 23:35:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:48,291 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2020-10-13 23:35:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:35:48,292 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 92 [2020-10-13 23:35:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:48,293 INFO L225 Difference]: With dead ends: 179 [2020-10-13 23:35:48,294 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:35:48,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:35:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:35:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-13 23:35:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:35:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-13 23:35:48,309 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 92 [2020-10-13 23:35:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:48,310 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-13 23:35:48,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:35:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-13 23:35:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 23:35:48,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:48,314 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:48,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:35:48,315 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1861215782, now seen corresponding path program 16 times [2020-10-13 23:35:48,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:48,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480361238] [2020-10-13 23:35:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:48,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:48,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:53,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:53,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:35:53,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:53,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:35:53,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:53,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:35:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:35:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:35:53,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:53,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:53,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:53,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:53,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:53,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:53,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:53,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:53,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:53,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:53,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:53,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:53,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:35:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-13 23:35:53,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480361238] [2020-10-13 23:35:53,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:53,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:35:53,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836031092] [2020-10-13 23:35:53,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:35:53,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:53,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:35:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:35:53,627 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 20 states. [2020-10-13 23:35:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:53,879 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2020-10-13 23:35:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:35:53,880 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-10-13 23:35:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:53,881 INFO L225 Difference]: With dead ends: 188 [2020-10-13 23:35:53,881 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:35:53,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:35:53,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:35:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-13 23:35:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 23:35:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-10-13 23:35:53,889 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 97 [2020-10-13 23:35:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:53,890 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-10-13 23:35:53,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:35:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-10-13 23:35:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 23:35:53,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:53,891 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:53,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:35:53,892 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:53,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:53,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1207301786, now seen corresponding path program 17 times [2020-10-13 23:35:53,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:53,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539320865] [2020-10-13 23:35:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:53,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:53,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:58,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:58,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 23:35:58,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:35:58,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 23:35:58,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:58,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:58,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:35:58,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:35:58,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:35:58,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:59,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:35:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:59,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:59,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:35:59,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:35:59,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:35:59,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:35:59,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:35:59,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:35:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:35:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:35:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:35:59,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:35:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-13 23:35:59,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539320865] [2020-10-13 23:35:59,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:35:59,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:35:59,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014426316] [2020-10-13 23:35:59,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:35:59,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:35:59,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:35:59,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:35:59,178 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 21 states. [2020-10-13 23:35:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:35:59,481 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2020-10-13 23:35:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:35:59,481 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 102 [2020-10-13 23:35:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:35:59,483 INFO L225 Difference]: With dead ends: 197 [2020-10-13 23:35:59,483 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 23:35:59,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:35:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 23:35:59,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-13 23:35:59,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 23:35:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-13 23:35:59,489 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 102 [2020-10-13 23:35:59,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:35:59,489 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-13 23:35:59,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:35:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-13 23:35:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:35:59,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:35:59,490 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:35:59,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:35:59,490 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:35:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:35:59,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1112684590, now seen corresponding path program 18 times [2020-10-13 23:35:59,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:35:59,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281903034] [2020-10-13 23:35:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:35:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:35:59,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:35:59,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:04,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:04,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 23:36:04,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:04,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 23:36:04,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:04,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:36:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:36:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:36:04,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:04,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:04,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:04,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:04,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:04,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:04,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:04,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:04,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:04,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:04,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:04,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:04,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-13 23:36:04,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281903034] [2020-10-13 23:36:04,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:04,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:36:04,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362193352] [2020-10-13 23:36:04,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:36:04,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:04,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:36:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:36:04,797 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 22 states. [2020-10-13 23:36:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:05,062 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2020-10-13 23:36:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:36:05,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-10-13 23:36:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:05,064 INFO L225 Difference]: With dead ends: 206 [2020-10-13 23:36:05,064 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:36:05,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:36:05,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:36:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-13 23:36:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 23:36:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-13 23:36:05,073 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 107 [2020-10-13 23:36:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:05,074 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-13 23:36:05,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:36:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-13 23:36:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 23:36:05,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:05,075 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:05,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:36:05,076 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:05,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1010160530, now seen corresponding path program 19 times [2020-10-13 23:36:05,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:05,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767186097] [2020-10-13 23:36:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:05,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:05,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:10,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:10,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 23:36:10,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:10,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:36:10,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:10,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:10,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:36:10,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 23:36:10,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:36:10,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:10,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:10,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:10,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:10,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:10,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:10,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:10,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:10,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:10,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:10,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:10,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:10,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-13 23:36:10,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767186097] [2020-10-13 23:36:10,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:10,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:36:10,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628646619] [2020-10-13 23:36:10,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:36:10,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:10,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:36:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:36:10,407 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 23 states. [2020-10-13 23:36:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:10,716 INFO L93 Difference]: Finished difference Result 215 states and 223 transitions. [2020-10-13 23:36:10,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:36:10,716 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-10-13 23:36:10,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:10,718 INFO L225 Difference]: With dead ends: 215 [2020-10-13 23:36:10,718 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:36:10,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:36:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:36:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-13 23:36:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:36:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2020-10-13 23:36:10,734 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 112 [2020-10-13 23:36:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:10,736 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2020-10-13 23:36:10,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:36:10,736 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2020-10-13 23:36:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:36:10,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:10,737 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:10,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:36:10,738 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:10,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:10,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1884348982, now seen corresponding path program 20 times [2020-10-13 23:36:10,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:10,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823420449] [2020-10-13 23:36:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:10,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:10,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:15,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:15,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:36:15,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:15,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5183 [2020-10-13 23:36:15,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:15,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:15,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:36:15,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:36:15,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:36:15,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:16,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:16,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:16,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:16,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:16,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:16,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:16,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:16,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:16,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-13 23:36:16,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823420449] [2020-10-13 23:36:16,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:16,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:36:16,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485499351] [2020-10-13 23:36:16,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:36:16,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:16,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:36:16,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:36:16,251 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 24 states. [2020-10-13 23:36:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:16,580 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2020-10-13 23:36:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:36:16,583 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2020-10-13 23:36:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:16,584 INFO L225 Difference]: With dead ends: 224 [2020-10-13 23:36:16,584 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:36:16,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:36:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:36:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-13 23:36:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 23:36:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-10-13 23:36:16,590 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 117 [2020-10-13 23:36:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:16,591 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-10-13 23:36:16,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:36:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-10-13 23:36:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 23:36:16,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:16,592 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:16,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:36:16,593 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:16,593 INFO L82 PathProgramCache]: Analyzing trace with hash -326920054, now seen corresponding path program 21 times [2020-10-13 23:36:16,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:16,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817905194] [2020-10-13 23:36:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:16,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:16,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:21,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:21,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 23:36:21,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:21,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 23:36:21,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:21,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:21,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:36:21,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:36:21,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:36:21,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:21,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:21,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:21,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:21,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:21,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:21,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:21,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:21,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:21,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:21,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:21,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:21,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-13 23:36:21,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817905194] [2020-10-13 23:36:21,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:21,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:36:21,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589761433] [2020-10-13 23:36:21,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:36:21,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:21,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:36:21,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:36:21,990 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 25 states. [2020-10-13 23:36:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:22,323 INFO L93 Difference]: Finished difference Result 233 states and 241 transitions. [2020-10-13 23:36:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:36:22,324 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 122 [2020-10-13 23:36:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:22,325 INFO L225 Difference]: With dead ends: 233 [2020-10-13 23:36:22,325 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 23:36:22,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:36:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 23:36:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-10-13 23:36:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 23:36:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2020-10-13 23:36:22,332 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 122 [2020-10-13 23:36:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:22,332 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2020-10-13 23:36:22,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:36:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2020-10-13 23:36:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 23:36:22,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:22,334 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:22,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:36:22,335 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:22,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1188305858, now seen corresponding path program 22 times [2020-10-13 23:36:22,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:22,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259135550] [2020-10-13 23:36:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:22,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:22,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:27,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:27,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 23:36:27,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:27,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-13 23:36:27,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:27,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:36:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:36:27,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:36:27,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:27,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:27,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:27,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:27,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:27,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:27,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:27,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:27,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:27,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-13 23:36:27,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259135550] [2020-10-13 23:36:27,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:27,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:36:27,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153155390] [2020-10-13 23:36:27,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:36:27,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:27,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:36:27,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:36:27,889 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 26 states. [2020-10-13 23:36:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:28,182 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2020-10-13 23:36:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:36:28,183 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-10-13 23:36:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:28,184 INFO L225 Difference]: With dead ends: 242 [2020-10-13 23:36:28,185 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:36:28,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:36:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:36:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-13 23:36:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 23:36:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2020-10-13 23:36:28,191 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 127 [2020-10-13 23:36:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:28,191 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2020-10-13 23:36:28,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:36:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2020-10-13 23:36:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 23:36:28,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:28,193 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:28,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:36:28,193 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1540310402, now seen corresponding path program 23 times [2020-10-13 23:36:28,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:28,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727567317] [2020-10-13 23:36:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:28,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:28,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:33,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:33,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 23:36:33,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:33,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-13 23:36:33,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:33,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:33,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:36:33,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 23:36:33,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:36:33,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:33,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:33,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:33,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:33,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:33,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:33,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:33,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:33,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:33,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:33,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:33,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:33,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-13 23:36:33,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727567317] [2020-10-13 23:36:33,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:33,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:36:33,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836643150] [2020-10-13 23:36:33,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:36:33,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:33,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:36:33,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:36:33,735 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand 27 states. [2020-10-13 23:36:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:34,083 INFO L93 Difference]: Finished difference Result 251 states and 259 transitions. [2020-10-13 23:36:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:36:34,083 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2020-10-13 23:36:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:34,085 INFO L225 Difference]: With dead ends: 251 [2020-10-13 23:36:34,085 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 23:36:34,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:36:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 23:36:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-13 23:36:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:36:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2020-10-13 23:36:34,101 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 132 [2020-10-13 23:36:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:34,101 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2020-10-13 23:36:34,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:36:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2020-10-13 23:36:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:36:34,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:34,106 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:34,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:36:34,107 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1193492038, now seen corresponding path program 24 times [2020-10-13 23:36:34,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:34,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633988381] [2020-10-13 23:36:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:34,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:34,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:39,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:39,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:36:39,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:39,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5165 [2020-10-13 23:36:39,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:39,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:39,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:36:39,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:36:39,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:36:39,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:39,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:39,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:39,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:39,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:39,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:39,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:39,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:39,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:39,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:39,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-13 23:36:39,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633988381] [2020-10-13 23:36:39,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:39,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:36:39,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582207857] [2020-10-13 23:36:39,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:36:39,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:39,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:36:39,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:36:39,690 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand 28 states. [2020-10-13 23:36:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:40,080 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2020-10-13 23:36:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:36:40,081 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2020-10-13 23:36:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:40,082 INFO L225 Difference]: With dead ends: 260 [2020-10-13 23:36:40,083 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 23:36:40,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:36:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 23:36:40,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2020-10-13 23:36:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 23:36:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2020-10-13 23:36:40,091 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 137 [2020-10-13 23:36:40,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:40,091 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2020-10-13 23:36:40,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:36:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2020-10-13 23:36:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 23:36:40,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:40,093 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:40,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:36:40,093 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash -418850182, now seen corresponding path program 25 times [2020-10-13 23:36:40,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:40,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596728916] [2020-10-13 23:36:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:40,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:40,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:45,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:45,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 23:36:45,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:45,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5267 [2020-10-13 23:36:45,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:45,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:36:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 23:36:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:36:45,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:45,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:45,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:45,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:45,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:45,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:36:45,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:45,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:45,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:45,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:45,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:45,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-13 23:36:45,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596728916] [2020-10-13 23:36:45,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:45,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:36:45,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553594283] [2020-10-13 23:36:45,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:36:45,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:36:45,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:36:45,881 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand 29 states. [2020-10-13 23:36:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:46,212 INFO L93 Difference]: Finished difference Result 269 states and 277 transitions. [2020-10-13 23:36:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:36:46,212 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2020-10-13 23:36:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:46,214 INFO L225 Difference]: With dead ends: 269 [2020-10-13 23:36:46,214 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 23:36:46,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:36:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 23:36:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-10-13 23:36:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 23:36:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2020-10-13 23:36:46,222 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 142 [2020-10-13 23:36:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:46,223 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2020-10-13 23:36:46,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:36:46,223 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2020-10-13 23:36:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 23:36:46,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:46,224 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:46,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:36:46,225 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:46,225 INFO L82 PathProgramCache]: Analyzing trace with hash -779546702, now seen corresponding path program 26 times [2020-10-13 23:36:46,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:46,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076789691] [2020-10-13 23:36:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:46,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:46,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:51,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:51,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 23:36:51,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:51,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5154 [2020-10-13 23:36:51,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:51,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:36:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:36:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:36:51,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:51,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:51,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:51,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:51,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:51,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:51,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:51,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:51,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:51,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:51,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-10-13 23:36:51,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076789691] [2020-10-13 23:36:51,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:51,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:36:51,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395874239] [2020-10-13 23:36:51,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:36:51,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:51,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:36:51,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:36:51,858 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand 30 states. [2020-10-13 23:36:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:52,255 INFO L93 Difference]: Finished difference Result 278 states and 286 transitions. [2020-10-13 23:36:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:36:52,256 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-10-13 23:36:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:52,258 INFO L225 Difference]: With dead ends: 278 [2020-10-13 23:36:52,258 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 23:36:52,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:36:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 23:36:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-13 23:36:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 23:36:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2020-10-13 23:36:52,265 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 147 [2020-10-13 23:36:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:52,266 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2020-10-13 23:36:52,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:36:52,266 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2020-10-13 23:36:52,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 23:36:52,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:52,267 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:52,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:36:52,267 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:52,268 INFO L82 PathProgramCache]: Analyzing trace with hash -987736206, now seen corresponding path program 27 times [2020-10-13 23:36:52,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:52,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967867499] [2020-10-13 23:36:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:52,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:52,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:57,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:57,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 23:36:57,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:36:57,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 23:36:57,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:57,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:57,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:36:57,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 23:36:57,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:36:57,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:57,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:36:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:57,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:57,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:36:57,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:36:57,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:36:57,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:36:57,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:36:57,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:36:57,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:36:57,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:36:57,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:36:57,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:36:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-10-13 23:36:57,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967867499] [2020-10-13 23:36:57,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:36:57,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:36:57,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686929970] [2020-10-13 23:36:57,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:36:57,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:36:57,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:36:57,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:36:57,924 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand 31 states. [2020-10-13 23:36:58,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:36:58,343 INFO L93 Difference]: Finished difference Result 287 states and 295 transitions. [2020-10-13 23:36:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:36:58,344 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2020-10-13 23:36:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:36:58,345 INFO L225 Difference]: With dead ends: 287 [2020-10-13 23:36:58,345 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 23:36:58,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:36:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 23:36:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-13 23:36:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 23:36:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2020-10-13 23:36:58,355 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 152 [2020-10-13 23:36:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:36:58,356 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2020-10-13 23:36:58,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:36:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2020-10-13 23:36:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 23:36:58,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:36:58,357 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:36:58,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:36:58,358 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:36:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:36:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash 312018346, now seen corresponding path program 28 times [2020-10-13 23:36:58,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:36:58,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716457040] [2020-10-13 23:36:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:36:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:36:58,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:36:58,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:03,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:03,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 23:37:03,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:03,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 23:37:03,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:03,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:37:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:37:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 23:37:03,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:03,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:03,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:03,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:03,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:03,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:03,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:03,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:03,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:03,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:03,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:03,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:03,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-13 23:37:04,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716457040] [2020-10-13 23:37:04,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:04,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:37:04,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182391461] [2020-10-13 23:37:04,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:37:04,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:04,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:37:04,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:37:04,021 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand 32 states. [2020-10-13 23:37:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:04,406 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2020-10-13 23:37:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:37:04,407 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 157 [2020-10-13 23:37:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:04,408 INFO L225 Difference]: With dead ends: 296 [2020-10-13 23:37:04,408 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 23:37:04,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:37:04,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 23:37:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-10-13 23:37:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 23:37:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2020-10-13 23:37:04,416 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 157 [2020-10-13 23:37:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:04,416 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2020-10-13 23:37:04,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:37:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2020-10-13 23:37:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 23:37:04,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:04,418 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:04,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:37:04,418 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:04,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2029667222, now seen corresponding path program 29 times [2020-10-13 23:37:04,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:04,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627709051] [2020-10-13 23:37:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:04,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:04,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:09,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:09,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 23:37:09,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:09,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5466 [2020-10-13 23:37:09,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:09,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:09,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:37:09,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 23:37:09,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:37:09,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:10,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:10,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:10,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:10,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:10,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:10,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:10,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:10,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:10,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-10-13 23:37:10,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627709051] [2020-10-13 23:37:10,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:10,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:37:10,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567528051] [2020-10-13 23:37:10,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:37:10,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:10,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:37:10,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:37:10,483 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand 33 states. [2020-10-13 23:37:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:10,928 INFO L93 Difference]: Finished difference Result 305 states and 313 transitions. [2020-10-13 23:37:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:37:10,929 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 162 [2020-10-13 23:37:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:10,931 INFO L225 Difference]: With dead ends: 305 [2020-10-13 23:37:10,931 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 23:37:10,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:37:10,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 23:37:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-13 23:37:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 23:37:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2020-10-13 23:37:10,942 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 162 [2020-10-13 23:37:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:10,942 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2020-10-13 23:37:10,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:37:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2020-10-13 23:37:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 23:37:10,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:10,944 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:10,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:37:10,945 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:10,946 INFO L82 PathProgramCache]: Analyzing trace with hash 332178338, now seen corresponding path program 30 times [2020-10-13 23:37:10,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:10,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804060116] [2020-10-13 23:37:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:10,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:11,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:16,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:16,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 23:37:16,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:16,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5197 [2020-10-13 23:37:16,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:16,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:16,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:37:16,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:37:16,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:37:16,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:16,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:16,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:16,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:16,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:16,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:16,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:16,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:16,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:16,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:16,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:16,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:16,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2020-10-13 23:37:16,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804060116] [2020-10-13 23:37:16,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:16,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:37:16,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518632808] [2020-10-13 23:37:16,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:37:16,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:16,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:37:16,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:37:16,779 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand 34 states. [2020-10-13 23:37:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:17,184 INFO L93 Difference]: Finished difference Result 314 states and 322 transitions. [2020-10-13 23:37:17,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:37:17,184 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-10-13 23:37:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:17,186 INFO L225 Difference]: With dead ends: 314 [2020-10-13 23:37:17,186 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 23:37:17,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:37:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 23:37:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-13 23:37:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 23:37:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2020-10-13 23:37:17,195 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 167 [2020-10-13 23:37:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:17,195 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2020-10-13 23:37:17,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:37:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2020-10-13 23:37:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 23:37:17,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:17,197 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:17,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:37:17,197 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:17,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1750529694, now seen corresponding path program 31 times [2020-10-13 23:37:17,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:17,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754830603] [2020-10-13 23:37:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:17,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:17,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:23,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:23,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 23:37:23,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:23,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5938 [2020-10-13 23:37:23,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:23,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:37:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 23:37:23,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 23:37:23,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:23,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:23,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:23,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:23,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:23,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:23,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:23,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:23,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:23,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:23,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:23,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:23,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-10-13 23:37:23,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754830603] [2020-10-13 23:37:23,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:23,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:37:23,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296635438] [2020-10-13 23:37:23,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:37:23,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:23,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:37:23,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:37:23,798 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand 35 states. [2020-10-13 23:37:24,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:24,237 INFO L93 Difference]: Finished difference Result 323 states and 331 transitions. [2020-10-13 23:37:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:37:24,238 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 172 [2020-10-13 23:37:24,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:24,239 INFO L225 Difference]: With dead ends: 323 [2020-10-13 23:37:24,239 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 23:37:24,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:37:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 23:37:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-10-13 23:37:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 23:37:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 185 transitions. [2020-10-13 23:37:24,253 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 185 transitions. Word has length 172 [2020-10-13 23:37:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:24,253 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 185 transitions. [2020-10-13 23:37:24,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:37:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 185 transitions. [2020-10-13 23:37:24,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 23:37:24,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:24,255 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:24,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:37:24,255 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:24,256 INFO L82 PathProgramCache]: Analyzing trace with hash 48490906, now seen corresponding path program 32 times [2020-10-13 23:37:24,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:24,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093947092] [2020-10-13 23:37:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:24,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:24,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:29,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:29,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 23:37:29,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:29,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5686 [2020-10-13 23:37:29,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:29,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:29,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:37:29,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:37:29,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 23:37:29,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:30,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:30,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:30,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:30,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:30,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:30,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:30,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:30,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:30,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:30,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:30,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:30,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-10-13 23:37:30,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093947092] [2020-10-13 23:37:30,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:30,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:37:30,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101212186] [2020-10-13 23:37:30,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:37:30,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:30,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:37:30,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:37:30,654 INFO L87 Difference]: Start difference. First operand 182 states and 185 transitions. Second operand 36 states. [2020-10-13 23:37:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:31,161 INFO L93 Difference]: Finished difference Result 332 states and 340 transitions. [2020-10-13 23:37:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:37:31,161 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-10-13 23:37:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:31,163 INFO L225 Difference]: With dead ends: 332 [2020-10-13 23:37:31,163 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 23:37:31,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:37:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 23:37:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2020-10-13 23:37:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 23:37:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2020-10-13 23:37:31,172 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 177 [2020-10-13 23:37:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:31,172 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2020-10-13 23:37:31,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:37:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2020-10-13 23:37:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 23:37:31,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:31,174 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:31,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:37:31,174 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1141227942, now seen corresponding path program 33 times [2020-10-13 23:37:31,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:31,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165172099] [2020-10-13 23:37:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:31,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:31,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:36,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:36,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 23:37:36,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:36,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5160 [2020-10-13 23:37:36,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:36,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:36,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:37:36,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 23:37:36,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:37:36,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:37,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:37,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:37,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:37,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:37,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:37,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:37,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:37,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:37,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-13 23:37:37,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165172099] [2020-10-13 23:37:37,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:37,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:37:37,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792092615] [2020-10-13 23:37:37,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:37:37,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:37,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:37:37,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:37:37,048 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand 37 states. [2020-10-13 23:37:37,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:37,547 INFO L93 Difference]: Finished difference Result 341 states and 349 transitions. [2020-10-13 23:37:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:37:37,547 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 182 [2020-10-13 23:37:37,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:37,548 INFO L225 Difference]: With dead ends: 341 [2020-10-13 23:37:37,549 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 23:37:37,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:37:37,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 23:37:37,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-10-13 23:37:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 23:37:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 195 transitions. [2020-10-13 23:37:37,556 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 195 transitions. Word has length 182 [2020-10-13 23:37:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:37,556 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 195 transitions. [2020-10-13 23:37:37,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:37:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 195 transitions. [2020-10-13 23:37:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 23:37:37,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:37,558 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:37,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:37:37,558 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:37,559 INFO L82 PathProgramCache]: Analyzing trace with hash 597612434, now seen corresponding path program 34 times [2020-10-13 23:37:37,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:37,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605183492] [2020-10-13 23:37:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:37,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:37,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:42,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:42,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 23:37:42,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:42,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:37:42,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:42,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:42,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:37:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:37:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 23:37:42,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:43,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:43,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:43,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:43,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:43,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:43,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:43,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:43,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:43,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:43,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-10-13 23:37:43,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605183492] [2020-10-13 23:37:43,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:43,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:37:43,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217188243] [2020-10-13 23:37:43,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:37:43,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:43,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:37:43,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:37:43,358 INFO L87 Difference]: Start difference. First operand 192 states and 195 transitions. Second operand 38 states. [2020-10-13 23:37:43,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:43,837 INFO L93 Difference]: Finished difference Result 350 states and 358 transitions. [2020-10-13 23:37:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:37:43,837 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 187 [2020-10-13 23:37:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:43,839 INFO L225 Difference]: With dead ends: 350 [2020-10-13 23:37:43,839 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 23:37:43,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:37:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 23:37:43,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2020-10-13 23:37:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 23:37:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2020-10-13 23:37:43,847 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 187 [2020-10-13 23:37:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:43,847 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2020-10-13 23:37:43,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:37:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2020-10-13 23:37:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-13 23:37:43,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:43,849 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:43,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:37:43,849 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1830200494, now seen corresponding path program 35 times [2020-10-13 23:37:43,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:43,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457457579] [2020-10-13 23:37:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:43,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:44,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:48,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:48,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-13 23:37:48,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:48,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-13 23:37:48,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:48,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:48,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:37:48,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 23:37:48,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 23:37:48,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:49,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:49,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:49,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:49,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:49,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:49,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:49,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:49,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:49,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:49,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:49,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:49,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-13 23:37:49,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457457579] [2020-10-13 23:37:49,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:49,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:37:49,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666328744] [2020-10-13 23:37:49,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:37:49,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:49,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:37:49,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:37:49,781 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand 39 states. [2020-10-13 23:37:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:50,249 INFO L93 Difference]: Finished difference Result 359 states and 367 transitions. [2020-10-13 23:37:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:37:50,250 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 192 [2020-10-13 23:37:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:50,251 INFO L225 Difference]: With dead ends: 359 [2020-10-13 23:37:50,252 INFO L226 Difference]: Without dead ends: 204 [2020-10-13 23:37:50,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:37:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-13 23:37:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-13 23:37:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 23:37:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 205 transitions. [2020-10-13 23:37:50,262 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 205 transitions. Word has length 192 [2020-10-13 23:37:50,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:50,262 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 205 transitions. [2020-10-13 23:37:50,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:37:50,262 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 205 transitions. [2020-10-13 23:37:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 23:37:50,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:50,264 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:50,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:37:50,264 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:50,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:50,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1337814410, now seen corresponding path program 36 times [2020-10-13 23:37:50,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:50,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068606579] [2020-10-13 23:37:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:50,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:55,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:55,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 23:37:55,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:37:55,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5132 [2020-10-13 23:37:55,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:55,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:55,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:37:55,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:37:55,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 23:37:55,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:56,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:37:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:56,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:56,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:37:56,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:37:56,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:37:56,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:37:56,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:37:56,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:37:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:37:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:37:56,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:37:56,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:37:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-10-13 23:37:56,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068606579] [2020-10-13 23:37:56,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:37:56,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:37:56,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575126416] [2020-10-13 23:37:56,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:37:56,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:37:56,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:37:56,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:37:56,254 INFO L87 Difference]: Start difference. First operand 202 states and 205 transitions. Second operand 40 states. [2020-10-13 23:37:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:37:56,809 INFO L93 Difference]: Finished difference Result 368 states and 376 transitions. [2020-10-13 23:37:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:37:56,809 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 197 [2020-10-13 23:37:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:37:56,811 INFO L225 Difference]: With dead ends: 368 [2020-10-13 23:37:56,811 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 23:37:56,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:37:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 23:37:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-13 23:37:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 23:37:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2020-10-13 23:37:56,818 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 197 [2020-10-13 23:37:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:37:56,818 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2020-10-13 23:37:56,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:37:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2020-10-13 23:37:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-13 23:37:56,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:37:56,819 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:37:56,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:37:56,819 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:37:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:37:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash 359030858, now seen corresponding path program 37 times [2020-10-13 23:37:56,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:37:56,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317788696] [2020-10-13 23:37:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:37:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:37:56,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:37:57,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:01,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:01,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-13 23:38:01,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:01,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 23:38:01,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:01,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:01,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:38:01,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 23:38:01,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 23:38:01,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:02,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:02,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:02,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:02,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:02,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:02,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:02,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:02,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3441 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-10-13 23:38:02,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317788696] [2020-10-13 23:38:02,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:02,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:38:02,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932023609] [2020-10-13 23:38:02,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:38:02,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:02,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:38:02,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:38:02,754 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand 41 states. [2020-10-13 23:38:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:03,284 INFO L93 Difference]: Finished difference Result 377 states and 385 transitions. [2020-10-13 23:38:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:38:03,285 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 202 [2020-10-13 23:38:03,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:03,286 INFO L225 Difference]: With dead ends: 377 [2020-10-13 23:38:03,287 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 23:38:03,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:38:03,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 23:38:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-10-13 23:38:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 23:38:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2020-10-13 23:38:03,294 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 202 [2020-10-13 23:38:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:03,294 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2020-10-13 23:38:03,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:38:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2020-10-13 23:38:03,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 23:38:03,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:03,296 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:03,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:38:03,297 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:03,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:03,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1996467074, now seen corresponding path program 38 times [2020-10-13 23:38:03,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:03,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38812505] [2020-10-13 23:38:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:03,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:03,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:08,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:08,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 23:38:08,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:08,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5493 [2020-10-13 23:38:08,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:08,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:38:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:38:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 23:38:08,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:09,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:09,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:09,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:09,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:09,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:09,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:09,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:09,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:09,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2020-10-13 23:38:09,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38812505] [2020-10-13 23:38:09,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:09,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:38:09,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154968525] [2020-10-13 23:38:09,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:38:09,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:09,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:38:09,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:38:09,746 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand 42 states. [2020-10-13 23:38:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:10,246 INFO L93 Difference]: Finished difference Result 386 states and 394 transitions. [2020-10-13 23:38:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:38:10,251 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 207 [2020-10-13 23:38:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:10,253 INFO L225 Difference]: With dead ends: 386 [2020-10-13 23:38:10,253 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 23:38:10,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:38:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 23:38:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-10-13 23:38:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-13 23:38:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2020-10-13 23:38:10,261 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 207 [2020-10-13 23:38:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:10,261 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2020-10-13 23:38:10,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:38:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2020-10-13 23:38:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-13 23:38:10,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:10,263 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:10,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:38:10,263 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:10,263 INFO L82 PathProgramCache]: Analyzing trace with hash 375475522, now seen corresponding path program 39 times [2020-10-13 23:38:10,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:10,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129380521] [2020-10-13 23:38:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:10,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:10,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:15,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:15,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-13 23:38:15,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:15,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5254 [2020-10-13 23:38:15,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:15,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:15,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:38:15,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 23:38:15,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:38:15,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:16,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:16,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:16,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:16,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:16,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:16,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:16,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:16,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:16,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3822 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2020-10-13 23:38:16,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129380521] [2020-10-13 23:38:16,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:16,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:38:16,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080644234] [2020-10-13 23:38:16,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:38:16,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:16,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:38:16,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:38:16,512 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand 43 states. [2020-10-13 23:38:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:17,114 INFO L93 Difference]: Finished difference Result 395 states and 403 transitions. [2020-10-13 23:38:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:38:17,114 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 212 [2020-10-13 23:38:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:17,116 INFO L225 Difference]: With dead ends: 395 [2020-10-13 23:38:17,116 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 23:38:17,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:38:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 23:38:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2020-10-13 23:38:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 23:38:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 225 transitions. [2020-10-13 23:38:17,124 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 225 transitions. Word has length 212 [2020-10-13 23:38:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:17,124 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 225 transitions. [2020-10-13 23:38:17,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:38:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 225 transitions. [2020-10-13 23:38:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-13 23:38:17,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:17,126 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:17,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:38:17,126 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash 522555770, now seen corresponding path program 40 times [2020-10-13 23:38:17,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:17,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181937333] [2020-10-13 23:38:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:17,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:17,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:22,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:22,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-13 23:38:22,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:22,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-13 23:38:22,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:22,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:22,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:38:22,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:38:22,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 23:38:22,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:23,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:23,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:23,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:23,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:23,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:23,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:23,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:23,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:23,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:23,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4020 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-10-13 23:38:23,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181937333] [2020-10-13 23:38:23,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:23,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:38:23,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043329141] [2020-10-13 23:38:23,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:38:23,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:23,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:38:23,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:38:23,300 INFO L87 Difference]: Start difference. First operand 222 states and 225 transitions. Second operand 44 states. [2020-10-13 23:38:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:23,888 INFO L93 Difference]: Finished difference Result 404 states and 412 transitions. [2020-10-13 23:38:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:38:23,889 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 217 [2020-10-13 23:38:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:23,890 INFO L225 Difference]: With dead ends: 404 [2020-10-13 23:38:23,891 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 23:38:23,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:38:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 23:38:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2020-10-13 23:38:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-13 23:38:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2020-10-13 23:38:23,898 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 217 [2020-10-13 23:38:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:23,899 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2020-10-13 23:38:23,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:38:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2020-10-13 23:38:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-13 23:38:23,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:23,900 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:23,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:38:23,901 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:23,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1026940358, now seen corresponding path program 41 times [2020-10-13 23:38:23,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:23,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165331281] [2020-10-13 23:38:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:23,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:24,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:29,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:29,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-13 23:38:29,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:38:29,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5438 [2020-10-13 23:38:29,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:29,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:29,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 23:38:29,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 23:38:29,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 23:38:29,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:30,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:30,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:30,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:30,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:30,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:30,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:38:30,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:30,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:30,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:38:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-10-13 23:38:30,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165331281] [2020-10-13 23:38:30,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:30,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 23:38:30,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666348772] [2020-10-13 23:38:30,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 23:38:30,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:30,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 23:38:30,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:38:30,457 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand 45 states. [2020-10-13 23:38:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:31,074 INFO L93 Difference]: Finished difference Result 413 states and 421 transitions. [2020-10-13 23:38:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 23:38:31,075 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 222 [2020-10-13 23:38:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:31,077 INFO L225 Difference]: With dead ends: 413 [2020-10-13 23:38:31,077 INFO L226 Difference]: Without dead ends: 234 [2020-10-13 23:38:31,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:38:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-13 23:38:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-10-13 23:38:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:38:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2020-10-13 23:38:31,086 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 222 [2020-10-13 23:38:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:31,087 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2020-10-13 23:38:31,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 23:38:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2020-10-13 23:38:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 23:38:31,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:31,089 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:31,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:38:31,090 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:31,090 INFO L82 PathProgramCache]: Analyzing trace with hash -470868110, now seen corresponding path program 42 times [2020-10-13 23:38:31,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:31,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171997690] [2020-10-13 23:38:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:31,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:31,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking...