/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=BIGGEST --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/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:46:57,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:46:57,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:46:57,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:46:57,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:46:57,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:46:57,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:46:57,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:46:57,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:46:57,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:46:57,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:46:57,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:46:57,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:46:57,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:46:57,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:46:57,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:46:57,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:46:57,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:46:57,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:46:58,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:46:58,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:46:58,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:46:58,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:46:58,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:46:58,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:46:58,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:46:58,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:46:58,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:46:58,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:46:58,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:46:58,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:46:58,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:46:58,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:46:58,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:46:58,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:46:58,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:46:58,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:46:58,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:46:58,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:46:58,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:46:58,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:46:58,019 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 [2020-10-12 09:46:58,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:46:58,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:46:58,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:46:58,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:46:58,044 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:46:58,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:46:58,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:46:58,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:46:58,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:46:58,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:46:58,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:46:58,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:46:58,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:46:58,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:46:58,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:46:58,047 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:46:58,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:46:58,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:46:58,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:46:58,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:46:58,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:46:58,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:46:58,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:46:58,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:46:58,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:46:58,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:46:58,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:46:58,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:46:58,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:46:58,049 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:46:58,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:46:58,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:46:58,369 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:46:58,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:46:58,371 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:46:58,371 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2020-10-12 09:46:58,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b3a45963/b178de24d1c64407add442e8e3d7ae88/FLAG9905a5c57 [2020-10-12 09:46:58,870 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:46:58,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2020-10-12 09:46:58,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b3a45963/b178de24d1c64407add442e8e3d7ae88/FLAG9905a5c57 [2020-10-12 09:46:59,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b3a45963/b178de24d1c64407add442e8e3d7ae88 [2020-10-12 09:46:59,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:46:59,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:46:59,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:46:59,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:46:59,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:46:59,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c7ea157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59, skipping insertion in model container [2020-10-12 09:46:59,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:46:59,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:46:59,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:46:59,488 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:46:59,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:46:59,613 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:46:59,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59 WrapperNode [2020-10-12 09:46:59,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:46:59,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:46:59,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:46:59,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:46:59,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59" (1/1) ... [2020-10-12 09:46:59,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:46:59,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:46:59,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:46:59,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:46:59,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59" (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 [2020-10-12 09:46:59,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:46:59,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:46:59,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:46:59,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:46:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:46:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:46:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:46:59,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:46:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:46:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:46:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:46:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:46:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:46:59,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:47:00,175 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:47:00,176 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-12 09:47:00,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:47:00 BoogieIcfgContainer [2020-10-12 09:47:00,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:47:00,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:47:00,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:47:00,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:47:00,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:46:59" (1/3) ... [2020-10-12 09:47:00,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cf0d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:47:00, skipping insertion in model container [2020-10-12 09:47:00,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:46:59" (2/3) ... [2020-10-12 09:47:00,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cf0d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:47:00, skipping insertion in model container [2020-10-12 09:47:00,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:47:00" (3/3) ... [2020-10-12 09:47:00,189 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2020-10-12 09:47:00,199 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:47:00,206 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:47:00,219 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:47:00,244 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:47:00,244 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:47:00,244 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:47:00,244 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:47:00,244 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:47:00,244 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:47:00,245 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:47:00,245 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:47:00,264 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-12 09:47:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 09:47:00,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:00,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:00,273 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:00,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2020-10-12 09:47:00,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:00,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054003333] [2020-10-12 09:47:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:00,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:00,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:00,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:00,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 09:47:00,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:00,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-12 09:47:00,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:00,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:00,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 09:47:00,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:00,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:47:00,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:00,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:00,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:00,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:00,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:00,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 09:47:00,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:00,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:00,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:00,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:00,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:00,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054003333] [2020-10-12 09:47:00,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:47:00,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 09:47:00,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016042277] [2020-10-12 09:47:00,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 09:47:00,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:00,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 09:47:00,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 09:47:00,641 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-12 09:47:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:00,801 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2020-10-12 09:47:00,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 09:47:00,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-12 09:47:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:00,815 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:47:00,815 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 09:47:00,819 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 [2020-10-12 09:47:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 09:47:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 09:47:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:47:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-12 09:47:00,869 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2020-10-12 09:47:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:00,870 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-12 09:47:00,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 09:47:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-12 09:47:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 09:47:00,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:00,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:00,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:47:00,873 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2020-10-12 09:47:00,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:00,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687261350] [2020-10-12 09:47:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:00,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 09:47:01,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:01,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-12 09:47:01,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:47:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:01,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:47:01,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:01,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:01,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:01,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:47:01,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:01,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:01,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:01,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:01,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687261350] [2020-10-12 09:47:01,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:47:01,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:47:01,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329438366] [2020-10-12 09:47:01,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:47:01,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:47:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:47:01,089 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2020-10-12 09:47:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:01,272 INFO L93 Difference]: Finished difference Result 92 states and 123 transitions. [2020-10-12 09:47:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:47:01,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 09:47:01,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:01,274 INFO L225 Difference]: With dead ends: 92 [2020-10-12 09:47:01,275 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 09:47:01,276 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 [2020-10-12 09:47:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 09:47:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-10-12 09:47:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 09:47:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-12 09:47:01,289 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 16 [2020-10-12 09:47:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:01,289 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-12 09:47:01,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:47:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-12 09:47:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 09:47:01,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:01,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:01,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:47:01,291 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:01,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:01,292 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2020-10-12 09:47:01,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:01,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658244876] [2020-10-12 09:47:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 09:47:01,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:47:01,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-12 09:47:01,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:47:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:47:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:47:01,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:01,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:01,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:01,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:01,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:01,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:01,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:01,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:01,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:01,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:47:01,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658244876] [2020-10-12 09:47:01,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:47:01,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 09:47:01,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287825429] [2020-10-12 09:47:01,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:47:01,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:01,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:47:01,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:47:01,831 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 5 states. [2020-10-12 09:47:02,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:02,009 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2020-10-12 09:47:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:47:02,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-12 09:47:02,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:02,011 INFO L225 Difference]: With dead ends: 86 [2020-10-12 09:47:02,012 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 09:47:02,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:47:02,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 09:47:02,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-12 09:47:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 09:47:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2020-10-12 09:47:02,022 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 20 [2020-10-12 09:47:02,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:02,022 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2020-10-12 09:47:02,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:47:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2020-10-12 09:47:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 09:47:02,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:02,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:02,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:47:02,024 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:02,025 INFO L82 PathProgramCache]: Analyzing trace with hash 717010635, now seen corresponding path program 1 times [2020-10-12 09:47:02,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:02,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999889210] [2020-10-12 09:47:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:02,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 09:47:02,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:02,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-12 09:47:02,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:02,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:47:02,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:02,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:47:02,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:02,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:02,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:02,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:02,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:02,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:02,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:02,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:02,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:02,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:02,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999889210] [2020-10-12 09:47:02,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:02,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:47:02,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107427792] [2020-10-12 09:47:02,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:47:02,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:47:02,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:47:02,158 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 5 states. [2020-10-12 09:47:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:02,327 INFO L93 Difference]: Finished difference Result 114 states and 153 transitions. [2020-10-12 09:47:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:47:02,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-12 09:47:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:02,329 INFO L225 Difference]: With dead ends: 114 [2020-10-12 09:47:02,329 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 09:47:02,330 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 [2020-10-12 09:47:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 09:47:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 57. [2020-10-12 09:47:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 09:47:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-10-12 09:47:02,340 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 21 [2020-10-12 09:47:02,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:02,341 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-10-12 09:47:02,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:47:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-10-12 09:47:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 09:47:02,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:02,342 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:02,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:47:02,343 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:02,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1931807191, now seen corresponding path program 2 times [2020-10-12 09:47:02,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:02,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785007511] [2020-10-12 09:47:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:02,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 09:47:02,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:02,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-12 09:47:02,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:47:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:02,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:47:02,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:02,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:02,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:02,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:02,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:02,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:02,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:02,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:02,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:02,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785007511] [2020-10-12 09:47:02,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:02,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:47:02,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893812130] [2020-10-12 09:47:02,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:47:02,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:02,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:47:02,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:47:02,529 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 6 states. [2020-10-12 09:47:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:02,716 INFO L93 Difference]: Finished difference Result 141 states and 190 transitions. [2020-10-12 09:47:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:47:02,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-12 09:47:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:02,719 INFO L225 Difference]: With dead ends: 141 [2020-10-12 09:47:02,719 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 09:47:02,720 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 [2020-10-12 09:47:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 09:47:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-10-12 09:47:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 09:47:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2020-10-12 09:47:02,731 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 23 [2020-10-12 09:47:02,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:02,732 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2020-10-12 09:47:02,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:47:02,732 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2020-10-12 09:47:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 09:47:02,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:02,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:02,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:47:02,733 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:02,734 INFO L82 PathProgramCache]: Analyzing trace with hash -530131449, now seen corresponding path program 3 times [2020-10-12 09:47:02,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:02,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619174418] [2020-10-12 09:47:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:02,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 09:47:02,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-12 09:47:02,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:47:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:47:02,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:02,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:02,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:02,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:02,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:02,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:02,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:02,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:02,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:02,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:02,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:02,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:02,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619174418] [2020-10-12 09:47:02,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:02,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:47:02,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404967186] [2020-10-12 09:47:02,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:47:02,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:02,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:47:02,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:47:02,933 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand 7 states. [2020-10-12 09:47:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:03,132 INFO L93 Difference]: Finished difference Result 179 states and 244 transitions. [2020-10-12 09:47:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:47:03,132 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-12 09:47:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:03,134 INFO L225 Difference]: With dead ends: 179 [2020-10-12 09:47:03,134 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 09:47:03,135 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 [2020-10-12 09:47:03,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 09:47:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2020-10-12 09:47:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 09:47:03,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 129 transitions. [2020-10-12 09:47:03,147 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 129 transitions. Word has length 25 [2020-10-12 09:47:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:03,147 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 129 transitions. [2020-10-12 09:47:03,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:47:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 129 transitions. [2020-10-12 09:47:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:47:03,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:03,148 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:03,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:47:03,149 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2139474331, now seen corresponding path program 4 times [2020-10-12 09:47:03,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:03,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338728449] [2020-10-12 09:47:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:03,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:03,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:47:03,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:03,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-12 09:47:03,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:47:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:47:03,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:03,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:03,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:03,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:03,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:03,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:03,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:03,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:03,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:03,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:03,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:03,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338728449] [2020-10-12 09:47:03,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:03,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:47:03,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244944653] [2020-10-12 09:47:03,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:47:03,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:03,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:47:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:47:03,470 INFO L87 Difference]: Start difference. First operand 97 states and 129 transitions. Second operand 8 states. [2020-10-12 09:47:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:03,698 INFO L93 Difference]: Finished difference Result 217 states and 298 transitions. [2020-10-12 09:47:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:47:03,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 09:47:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:03,701 INFO L225 Difference]: With dead ends: 217 [2020-10-12 09:47:03,701 INFO L226 Difference]: Without dead ends: 135 [2020-10-12 09:47:03,702 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 [2020-10-12 09:47:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-12 09:47:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2020-10-12 09:47:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 09:47:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2020-10-12 09:47:03,714 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 27 [2020-10-12 09:47:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:03,714 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2020-10-12 09:47:03,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:47:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2020-10-12 09:47:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:47:03,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:03,716 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:03,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:47:03,716 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:03,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1765209923, now seen corresponding path program 5 times [2020-10-12 09:47:03,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:03,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978531483] [2020-10-12 09:47:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:03,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:03,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:47:03,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:03,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-12 09:47:03,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:03,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:47:03,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:03,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:47:03,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:04,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:04,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:04,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:04,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:04,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:04,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:04,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:04,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:04,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:04,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978531483] [2020-10-12 09:47:04,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:04,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:47:04,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431625125] [2020-10-12 09:47:04,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:47:04,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:04,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:47:04,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:47:04,048 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand 9 states. [2020-10-12 09:47:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:04,328 INFO L93 Difference]: Finished difference Result 255 states and 352 transitions. [2020-10-12 09:47:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:47:04,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-12 09:47:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:04,330 INFO L225 Difference]: With dead ends: 255 [2020-10-12 09:47:04,331 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 09:47:04,332 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 [2020-10-12 09:47:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 09:47:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 137. [2020-10-12 09:47:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 09:47:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 185 transitions. [2020-10-12 09:47:04,344 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 185 transitions. Word has length 29 [2020-10-12 09:47:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:04,344 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 185 transitions. [2020-10-12 09:47:04,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:47:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 185 transitions. [2020-10-12 09:47:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 09:47:04,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:04,346 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:04,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:47:04,346 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:04,347 INFO L82 PathProgramCache]: Analyzing trace with hash 365361313, now seen corresponding path program 6 times [2020-10-12 09:47:04,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:04,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435126763] [2020-10-12 09:47:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:04,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:47:04,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:04,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-12 09:47:04,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:47:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:47:04,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:04,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:04,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:04,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:04,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:47:04,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:04,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:04,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:04,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435126763] [2020-10-12 09:47:04,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:04,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:47:04,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061024578] [2020-10-12 09:47:04,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:47:04,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:04,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:47:04,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:47:04,763 INFO L87 Difference]: Start difference. First operand 137 states and 185 transitions. Second operand 10 states. [2020-10-12 09:47:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:05,123 INFO L93 Difference]: Finished difference Result 293 states and 406 transitions. [2020-10-12 09:47:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:47:05,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-12 09:47:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:05,125 INFO L225 Difference]: With dead ends: 293 [2020-10-12 09:47:05,125 INFO L226 Difference]: Without dead ends: 175 [2020-10-12 09:47:05,126 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 [2020-10-12 09:47:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-12 09:47:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 157. [2020-10-12 09:47:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 09:47:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2020-10-12 09:47:05,136 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 31 [2020-10-12 09:47:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:05,137 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2020-10-12 09:47:05,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:47:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2020-10-12 09:47:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 09:47:05,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:05,138 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:05,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:47:05,139 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:05,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:05,139 INFO L82 PathProgramCache]: Analyzing trace with hash -564389249, now seen corresponding path program 7 times [2020-10-12 09:47:05,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:05,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920399357] [2020-10-12 09:47:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:05,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 09:47:05,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:05,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-12 09:47:05,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:05,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:47:05,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:05,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:47:05,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:05,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:05,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:05,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:05,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:05,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:05,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:05,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920399357] [2020-10-12 09:47:05,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:05,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:47:05,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946680428] [2020-10-12 09:47:05,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:47:05,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:05,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:47:05,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:47:05,558 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand 11 states. [2020-10-12 09:47:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:05,902 INFO L93 Difference]: Finished difference Result 331 states and 460 transitions. [2020-10-12 09:47:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:47:05,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-12 09:47:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:05,905 INFO L225 Difference]: With dead ends: 331 [2020-10-12 09:47:05,905 INFO L226 Difference]: Without dead ends: 195 [2020-10-12 09:47:05,906 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 [2020-10-12 09:47:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-12 09:47:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 177. [2020-10-12 09:47:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 09:47:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 241 transitions. [2020-10-12 09:47:05,917 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 241 transitions. Word has length 33 [2020-10-12 09:47:05,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:05,917 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 241 transitions. [2020-10-12 09:47:05,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:47:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 241 transitions. [2020-10-12 09:47:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:47:05,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:05,919 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:05,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:47:05,919 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:05,920 INFO L82 PathProgramCache]: Analyzing trace with hash -701481763, now seen corresponding path program 8 times [2020-10-12 09:47:05,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:05,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900567573] [2020-10-12 09:47:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:05,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:06,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:47:06,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:06,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-12 09:47:06,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:06,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:47:06,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:06,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:47:06,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:06,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:06,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:06,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:06,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:06,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:06,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:06,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:06,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:06,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900567573] [2020-10-12 09:47:06,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:06,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:47:06,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549145952] [2020-10-12 09:47:06,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:47:06,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:06,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:47:06,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:47:06,594 INFO L87 Difference]: Start difference. First operand 177 states and 241 transitions. Second operand 12 states. [2020-10-12 09:47:07,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:07,127 INFO L93 Difference]: Finished difference Result 369 states and 514 transitions. [2020-10-12 09:47:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:47:07,128 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-12 09:47:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:07,131 INFO L225 Difference]: With dead ends: 369 [2020-10-12 09:47:07,131 INFO L226 Difference]: Without dead ends: 215 [2020-10-12 09:47:07,133 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 [2020-10-12 09:47:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-12 09:47:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 197. [2020-10-12 09:47:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-12 09:47:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 269 transitions. [2020-10-12 09:47:07,155 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 269 transitions. Word has length 35 [2020-10-12 09:47:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:07,156 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 269 transitions. [2020-10-12 09:47:07,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:47:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 269 transitions. [2020-10-12 09:47:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:47:07,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:07,162 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:07,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:47:07,163 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash 696598459, now seen corresponding path program 9 times [2020-10-12 09:47:07,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:07,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195308895] [2020-10-12 09:47:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:07,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:07,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 09:47:07,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:07,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-12 09:47:07,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:47:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:47:07,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:07,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:07,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:07,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:07,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:07,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:07,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:07,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:07,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:07,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:07,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:07,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:07,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195308895] [2020-10-12 09:47:07,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:07,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:47:07,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486631514] [2020-10-12 09:47:07,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:47:07,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:07,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:47:07,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:47:07,938 INFO L87 Difference]: Start difference. First operand 197 states and 269 transitions. Second operand 13 states. [2020-10-12 09:47:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:08,397 INFO L93 Difference]: Finished difference Result 407 states and 568 transitions. [2020-10-12 09:47:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:47:08,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-12 09:47:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:08,400 INFO L225 Difference]: With dead ends: 407 [2020-10-12 09:47:08,400 INFO L226 Difference]: Without dead ends: 235 [2020-10-12 09:47:08,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:47:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-12 09:47:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 217. [2020-10-12 09:47:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-12 09:47:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 297 transitions. [2020-10-12 09:47:08,418 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 297 transitions. Word has length 37 [2020-10-12 09:47:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:08,419 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 297 transitions. [2020-10-12 09:47:08,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:47:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 297 transitions. [2020-10-12 09:47:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:47:08,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:08,420 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:08,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:47:08,420 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:08,421 INFO L82 PathProgramCache]: Analyzing trace with hash -73071847, now seen corresponding path program 10 times [2020-10-12 09:47:08,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:08,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111259563] [2020-10-12 09:47:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:08,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:08,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:09,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:09,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:47:09,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:09,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 892 [2020-10-12 09:47:09,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:09,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:47:09,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:09,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:47:09,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:09,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:09,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:09,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:09,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:09,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:09,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:09,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:09,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:09,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111259563] [2020-10-12 09:47:09,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:09,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:47:09,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206068995] [2020-10-12 09:47:09,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:47:09,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:09,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:47:09,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:47:09,452 INFO L87 Difference]: Start difference. First operand 217 states and 297 transitions. Second operand 14 states. [2020-10-12 09:47:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:09,898 INFO L93 Difference]: Finished difference Result 445 states and 622 transitions. [2020-10-12 09:47:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:47:09,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-12 09:47:09,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:09,900 INFO L225 Difference]: With dead ends: 445 [2020-10-12 09:47:09,901 INFO L226 Difference]: Without dead ends: 255 [2020-10-12 09:47:09,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:47:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-12 09:47:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 237. [2020-10-12 09:47:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 09:47:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 325 transitions. [2020-10-12 09:47:09,920 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 325 transitions. Word has length 39 [2020-10-12 09:47:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:09,920 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 325 transitions. [2020-10-12 09:47:09,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:47:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 325 transitions. [2020-10-12 09:47:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:47:09,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:09,925 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:09,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:47:09,926 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:09,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:09,926 INFO L82 PathProgramCache]: Analyzing trace with hash -991861001, now seen corresponding path program 11 times [2020-10-12 09:47:09,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:09,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984561784] [2020-10-12 09:47:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:09,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:09,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:10,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:47:10,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:10,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-12 09:47:10,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:47:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:47:10,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:10,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:10,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:10,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:10,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:10,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:10,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:10,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:10,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:10,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:10,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:10,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984561784] [2020-10-12 09:47:10,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:10,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:47:10,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206126019] [2020-10-12 09:47:10,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:47:10,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:10,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:47:10,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:47:10,912 INFO L87 Difference]: Start difference. First operand 237 states and 325 transitions. Second operand 15 states. [2020-10-12 09:47:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:11,447 INFO L93 Difference]: Finished difference Result 483 states and 676 transitions. [2020-10-12 09:47:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:47:11,448 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-12 09:47:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:11,452 INFO L225 Difference]: With dead ends: 483 [2020-10-12 09:47:11,452 INFO L226 Difference]: Without dead ends: 275 [2020-10-12 09:47:11,453 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 [2020-10-12 09:47:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-12 09:47:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2020-10-12 09:47:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-12 09:47:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 353 transitions. [2020-10-12 09:47:11,470 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 353 transitions. Word has length 41 [2020-10-12 09:47:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:11,470 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 353 transitions. [2020-10-12 09:47:11,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:47:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 353 transitions. [2020-10-12 09:47:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:47:11,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:11,472 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:11,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:47:11,472 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash 815024981, now seen corresponding path program 12 times [2020-10-12 09:47:11,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:11,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092860370] [2020-10-12 09:47:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:11,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:11,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:12,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:12,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:47:12,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:12,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 897 [2020-10-12 09:47:12,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:12,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:47:12,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:12,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:47:12,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:12,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:12,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:12,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:12,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:12,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:12,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:12,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:12,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:12,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092860370] [2020-10-12 09:47:12,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:12,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:47:12,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952835028] [2020-10-12 09:47:12,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:47:12,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:12,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:47:12,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:47:12,562 INFO L87 Difference]: Start difference. First operand 257 states and 353 transitions. Second operand 16 states. [2020-10-12 09:47:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:13,078 INFO L93 Difference]: Finished difference Result 521 states and 730 transitions. [2020-10-12 09:47:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:47:13,078 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-12 09:47:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:13,080 INFO L225 Difference]: With dead ends: 521 [2020-10-12 09:47:13,081 INFO L226 Difference]: Without dead ends: 295 [2020-10-12 09:47:13,082 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 [2020-10-12 09:47:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-12 09:47:13,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 277. [2020-10-12 09:47:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-12 09:47:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 381 transitions. [2020-10-12 09:47:13,096 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 381 transitions. Word has length 43 [2020-10-12 09:47:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:13,097 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 381 transitions. [2020-10-12 09:47:13,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:47:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 381 transitions. [2020-10-12 09:47:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 09:47:13,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:13,098 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:13,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:47:13,098 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2065666099, now seen corresponding path program 13 times [2020-10-12 09:47:13,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:13,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235364537] [2020-10-12 09:47:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:13,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:13,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:13,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:13,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 09:47:13,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:13,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-12 09:47:13,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:47:13,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:13,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:47:13,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:14,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:14,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:14,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:14,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:14,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:14,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:14,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:14,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:14,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:14,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:14,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:14,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235364537] [2020-10-12 09:47:14,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:14,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:47:14,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624883157] [2020-10-12 09:47:14,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:47:14,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:14,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:47:14,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:47:14,076 INFO L87 Difference]: Start difference. First operand 277 states and 381 transitions. Second operand 17 states. [2020-10-12 09:47:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:14,586 INFO L93 Difference]: Finished difference Result 559 states and 784 transitions. [2020-10-12 09:47:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:47:14,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-12 09:47:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:14,590 INFO L225 Difference]: With dead ends: 559 [2020-10-12 09:47:14,590 INFO L226 Difference]: Without dead ends: 315 [2020-10-12 09:47:14,591 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 [2020-10-12 09:47:14,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-12 09:47:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 297. [2020-10-12 09:47:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-12 09:47:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 409 transitions. [2020-10-12 09:47:14,610 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 409 transitions. Word has length 45 [2020-10-12 09:47:14,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:14,610 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 409 transitions. [2020-10-12 09:47:14,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:47:14,610 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 409 transitions. [2020-10-12 09:47:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:47:14,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:14,611 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:14,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:47:14,611 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:14,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1340937617, now seen corresponding path program 14 times [2020-10-12 09:47:14,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:14,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530796016] [2020-10-12 09:47:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:14,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:14,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:15,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:15,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:47:15,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:15,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-12 09:47:15,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:15,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:47:15,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:15,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:47:15,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:16,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:16,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:16,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:16,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:16,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:16,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:16,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:16,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:16,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530796016] [2020-10-12 09:47:16,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:16,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:47:16,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814462767] [2020-10-12 09:47:16,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:47:16,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:16,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:47:16,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:47:16,090 INFO L87 Difference]: Start difference. First operand 297 states and 409 transitions. Second operand 18 states. [2020-10-12 09:47:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:16,672 INFO L93 Difference]: Finished difference Result 597 states and 838 transitions. [2020-10-12 09:47:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:47:16,672 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-12 09:47:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:16,674 INFO L225 Difference]: With dead ends: 597 [2020-10-12 09:47:16,675 INFO L226 Difference]: Without dead ends: 335 [2020-10-12 09:47:16,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:47:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-12 09:47:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 317. [2020-10-12 09:47:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-12 09:47:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 437 transitions. [2020-10-12 09:47:16,698 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 437 transitions. Word has length 47 [2020-10-12 09:47:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:16,699 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 437 transitions. [2020-10-12 09:47:16,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:47:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 437 transitions. [2020-10-12 09:47:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:47:16,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:16,700 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:16,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:47:16,700 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:16,701 INFO L82 PathProgramCache]: Analyzing trace with hash 661568367, now seen corresponding path program 15 times [2020-10-12 09:47:16,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:16,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256118273] [2020-10-12 09:47:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:16,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:17,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:17,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:47:17,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:17,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-12 09:47:17,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:17,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:47:17,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:17,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:47:17,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:17,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:17,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:17,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:17,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:17,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:17,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:17,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:17,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:17,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:17,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:17,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:17,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256118273] [2020-10-12 09:47:17,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:17,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:47:17,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594487310] [2020-10-12 09:47:17,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:47:17,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:17,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:47:17,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:47:17,957 INFO L87 Difference]: Start difference. First operand 317 states and 437 transitions. Second operand 19 states. [2020-10-12 09:47:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:18,647 INFO L93 Difference]: Finished difference Result 635 states and 892 transitions. [2020-10-12 09:47:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:47:18,647 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-12 09:47:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:18,649 INFO L225 Difference]: With dead ends: 635 [2020-10-12 09:47:18,649 INFO L226 Difference]: Without dead ends: 355 [2020-10-12 09:47:18,652 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 [2020-10-12 09:47:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-12 09:47:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 337. [2020-10-12 09:47:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-12 09:47:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 465 transitions. [2020-10-12 09:47:18,669 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 465 transitions. Word has length 49 [2020-10-12 09:47:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:18,670 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 465 transitions. [2020-10-12 09:47:18,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:47:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 465 transitions. [2020-10-12 09:47:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 09:47:18,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:18,670 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:18,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:47:18,671 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:18,671 INFO L82 PathProgramCache]: Analyzing trace with hash 622748109, now seen corresponding path program 16 times [2020-10-12 09:47:18,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:18,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261805105] [2020-10-12 09:47:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:18,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:18,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:19,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:19,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 09:47:19,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:19,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-12 09:47:19,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:19,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:47:19,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:19,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:47:19,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:19,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:19,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:19,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:19,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:19,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:19,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:19,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:19,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:19,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:19,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:19,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:19,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261805105] [2020-10-12 09:47:19,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:19,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:47:19,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487904379] [2020-10-12 09:47:19,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:47:19,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:19,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:47:19,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:47:19,976 INFO L87 Difference]: Start difference. First operand 337 states and 465 transitions. Second operand 20 states. [2020-10-12 09:47:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:20,683 INFO L93 Difference]: Finished difference Result 673 states and 946 transitions. [2020-10-12 09:47:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:47:20,685 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-10-12 09:47:20,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:20,688 INFO L225 Difference]: With dead ends: 673 [2020-10-12 09:47:20,689 INFO L226 Difference]: Without dead ends: 375 [2020-10-12 09:47:20,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:47:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-12 09:47:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 357. [2020-10-12 09:47:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-12 09:47:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 493 transitions. [2020-10-12 09:47:20,720 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 493 transitions. Word has length 51 [2020-10-12 09:47:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:20,720 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 493 transitions. [2020-10-12 09:47:20,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:47:20,720 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 493 transitions. [2020-10-12 09:47:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:47:20,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:20,721 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:20,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:47:20,721 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:20,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1971185835, now seen corresponding path program 17 times [2020-10-12 09:47:20,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:20,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72011890] [2020-10-12 09:47:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:20,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:20,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:21,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:21,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:47:21,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:21,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-10-12 09:47:21,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:21,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:47:21,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:21,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:47:21,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:22,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:22,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:22,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:22,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:22,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:22,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:22,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:22,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:22,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:22,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72011890] [2020-10-12 09:47:22,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:22,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:47:22,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158771434] [2020-10-12 09:47:22,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:47:22,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:47:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:47:22,141 INFO L87 Difference]: Start difference. First operand 357 states and 493 transitions. Second operand 21 states. [2020-10-12 09:47:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:22,980 INFO L93 Difference]: Finished difference Result 711 states and 1000 transitions. [2020-10-12 09:47:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:47:22,981 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-12 09:47:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:22,985 INFO L225 Difference]: With dead ends: 711 [2020-10-12 09:47:22,985 INFO L226 Difference]: Without dead ends: 395 [2020-10-12 09:47:22,987 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 [2020-10-12 09:47:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-12 09:47:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 377. [2020-10-12 09:47:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-10-12 09:47:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 521 transitions. [2020-10-12 09:47:23,008 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 521 transitions. Word has length 53 [2020-10-12 09:47:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:23,008 INFO L479 AbstractCegarLoop]: Abstraction has 377 states and 521 transitions. [2020-10-12 09:47:23,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:47:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 521 transitions. [2020-10-12 09:47:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:47:23,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:23,009 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:23,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:47:23,010 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:23,010 INFO L82 PathProgramCache]: Analyzing trace with hash 739717129, now seen corresponding path program 18 times [2020-10-12 09:47:23,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:23,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495822979] [2020-10-12 09:47:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:23,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:23,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:24,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:24,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:47:24,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:24,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1250 [2020-10-12 09:47:24,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:24,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:47:24,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:24,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:47:24,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:24,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:24,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:24,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:24,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:24,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:24,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:24,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:24,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:24,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495822979] [2020-10-12 09:47:24,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:24,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:47:24,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922028806] [2020-10-12 09:47:24,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:47:24,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:24,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:47:24,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:47:24,539 INFO L87 Difference]: Start difference. First operand 377 states and 521 transitions. Second operand 22 states. [2020-10-12 09:47:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:25,625 INFO L93 Difference]: Finished difference Result 749 states and 1054 transitions. [2020-10-12 09:47:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:47:25,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-12 09:47:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:25,637 INFO L225 Difference]: With dead ends: 749 [2020-10-12 09:47:25,638 INFO L226 Difference]: Without dead ends: 415 [2020-10-12 09:47:25,642 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 [2020-10-12 09:47:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-12 09:47:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 397. [2020-10-12 09:47:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-12 09:47:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 549 transitions. [2020-10-12 09:47:25,673 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 549 transitions. Word has length 55 [2020-10-12 09:47:25,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:25,674 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 549 transitions. [2020-10-12 09:47:25,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:47:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 549 transitions. [2020-10-12 09:47:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 09:47:25,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:25,675 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:25,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:47:25,676 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:25,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1585702937, now seen corresponding path program 19 times [2020-10-12 09:47:25,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:25,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038851908] [2020-10-12 09:47:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:25,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:25,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:27,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:27,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 09:47:27,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:27,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1554 [2020-10-12 09:47:27,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:27,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:47:27,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:27,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:47:27,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:27,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:27,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:27,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:27,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:27,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:27,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:27,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:27,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:27,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:27,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:27,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:27,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038851908] [2020-10-12 09:47:27,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:27,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:47:27,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022014972] [2020-10-12 09:47:27,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:47:27,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:27,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:47:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:47:27,571 INFO L87 Difference]: Start difference. First operand 397 states and 549 transitions. Second operand 23 states. [2020-10-12 09:47:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:28,527 INFO L93 Difference]: Finished difference Result 787 states and 1108 transitions. [2020-10-12 09:47:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:47:28,529 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-12 09:47:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:28,534 INFO L225 Difference]: With dead ends: 787 [2020-10-12 09:47:28,535 INFO L226 Difference]: Without dead ends: 435 [2020-10-12 09:47:28,538 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 [2020-10-12 09:47:28,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-12 09:47:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 417. [2020-10-12 09:47:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-10-12 09:47:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 577 transitions. [2020-10-12 09:47:28,584 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 577 transitions. Word has length 57 [2020-10-12 09:47:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:28,584 INFO L479 AbstractCegarLoop]: Abstraction has 417 states and 577 transitions. [2020-10-12 09:47:28,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:47:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 577 transitions. [2020-10-12 09:47:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:47:28,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:28,586 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:28,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:47:28,589 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:28,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:28,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1363574853, now seen corresponding path program 20 times [2020-10-12 09:47:28,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:28,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357135495] [2020-10-12 09:47:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:28,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:28,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:30,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:30,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 09:47:30,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:30,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1464 [2020-10-12 09:47:30,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:30,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:47:30,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:30,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:47:30,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:30,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:30,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:30,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:30,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:30,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:30,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:30,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:30,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:30,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:30,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:30,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:30,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357135495] [2020-10-12 09:47:30,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:30,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:47:30,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117156004] [2020-10-12 09:47:30,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:47:30,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:47:30,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:47:30,379 INFO L87 Difference]: Start difference. First operand 417 states and 577 transitions. Second operand 24 states. [2020-10-12 09:47:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:31,222 INFO L93 Difference]: Finished difference Result 825 states and 1162 transitions. [2020-10-12 09:47:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:47:31,222 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-12 09:47:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:31,225 INFO L225 Difference]: With dead ends: 825 [2020-10-12 09:47:31,225 INFO L226 Difference]: Without dead ends: 455 [2020-10-12 09:47:31,227 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 [2020-10-12 09:47:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-12 09:47:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 437. [2020-10-12 09:47:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-10-12 09:47:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 605 transitions. [2020-10-12 09:47:31,254 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 605 transitions. Word has length 59 [2020-10-12 09:47:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:31,254 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 605 transitions. [2020-10-12 09:47:31,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:47:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 605 transitions. [2020-10-12 09:47:31,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:47:31,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:31,255 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:31,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:47:31,255 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:31,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:31,256 INFO L82 PathProgramCache]: Analyzing trace with hash 941115683, now seen corresponding path program 21 times [2020-10-12 09:47:31,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:31,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066365502] [2020-10-12 09:47:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:31,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:32,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:32,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:47:32,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:32,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-10-12 09:47:32,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:32,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:47:32,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:32,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:47:32,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:32,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:32,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:32,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:32,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:32,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:32,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:32,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:32,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:32,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:32,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066365502] [2020-10-12 09:47:32,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:32,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:47:32,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342127484] [2020-10-12 09:47:32,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:47:32,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:32,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:47:32,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:47:32,603 INFO L87 Difference]: Start difference. First operand 437 states and 605 transitions. Second operand 25 states. [2020-10-12 09:47:33,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:33,572 INFO L93 Difference]: Finished difference Result 863 states and 1216 transitions. [2020-10-12 09:47:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:47:33,573 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-12 09:47:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:33,577 INFO L225 Difference]: With dead ends: 863 [2020-10-12 09:47:33,577 INFO L226 Difference]: Without dead ends: 475 [2020-10-12 09:47:33,578 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 [2020-10-12 09:47:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-12 09:47:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 457. [2020-10-12 09:47:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-10-12 09:47:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 633 transitions. [2020-10-12 09:47:33,600 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 633 transitions. Word has length 61 [2020-10-12 09:47:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:33,600 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 633 transitions. [2020-10-12 09:47:33,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:47:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 633 transitions. [2020-10-12 09:47:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 09:47:33,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:33,601 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:33,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:47:33,601 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:33,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1315220863, now seen corresponding path program 22 times [2020-10-12 09:47:33,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:33,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823761176] [2020-10-12 09:47:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:33,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:33,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:34,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:34,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 09:47:34,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:34,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1025 [2020-10-12 09:47:34,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:34,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:47:34,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:34,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:47:34,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:34,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:34,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:34,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:34,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:34,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:34,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:34,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:34,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:34,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:34,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:34,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:34,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823761176] [2020-10-12 09:47:34,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:34,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:47:34,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350922272] [2020-10-12 09:47:34,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:47:34,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:34,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:47:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:47:34,996 INFO L87 Difference]: Start difference. First operand 457 states and 633 transitions. Second operand 26 states. [2020-10-12 09:47:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:36,133 INFO L93 Difference]: Finished difference Result 901 states and 1270 transitions. [2020-10-12 09:47:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:47:36,134 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-10-12 09:47:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:36,138 INFO L225 Difference]: With dead ends: 901 [2020-10-12 09:47:36,139 INFO L226 Difference]: Without dead ends: 495 [2020-10-12 09:47:36,141 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 [2020-10-12 09:47:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-10-12 09:47:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-10-12 09:47:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-12 09:47:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 661 transitions. [2020-10-12 09:47:36,185 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 661 transitions. Word has length 63 [2020-10-12 09:47:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:36,186 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 661 transitions. [2020-10-12 09:47:36,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:47:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 661 transitions. [2020-10-12 09:47:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:47:36,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:36,187 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:36,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:47:36,187 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:36,187 INFO L82 PathProgramCache]: Analyzing trace with hash -696157089, now seen corresponding path program 23 times [2020-10-12 09:47:36,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:36,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95198250] [2020-10-12 09:47:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:36,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:36,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:37,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:37,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 09:47:37,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:37,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1097 [2020-10-12 09:47:37,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:37,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:47:37,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:37,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:47:37,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:37,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:37,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:37,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:37,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:37,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:37,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:37,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:37,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:37,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:37,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:37,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:37,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95198250] [2020-10-12 09:47:37,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:37,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:47:37,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571216856] [2020-10-12 09:47:37,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:47:37,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:37,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:47:37,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:47:37,679 INFO L87 Difference]: Start difference. First operand 477 states and 661 transitions. Second operand 27 states. [2020-10-12 09:47:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:38,892 INFO L93 Difference]: Finished difference Result 939 states and 1324 transitions. [2020-10-12 09:47:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:47:38,893 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2020-10-12 09:47:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:38,897 INFO L225 Difference]: With dead ends: 939 [2020-10-12 09:47:38,897 INFO L226 Difference]: Without dead ends: 515 [2020-10-12 09:47:38,900 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 [2020-10-12 09:47:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-12 09:47:38,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 497. [2020-10-12 09:47:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-12 09:47:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 689 transitions. [2020-10-12 09:47:38,938 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 689 transitions. Word has length 65 [2020-10-12 09:47:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:38,938 INFO L479 AbstractCegarLoop]: Abstraction has 497 states and 689 transitions. [2020-10-12 09:47:38,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:47:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 689 transitions. [2020-10-12 09:47:38,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 09:47:38,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:38,940 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:38,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:47:38,941 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:38,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1518642877, now seen corresponding path program 24 times [2020-10-12 09:47:38,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:38,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168154653] [2020-10-12 09:47:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:38,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:39,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:40,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:40,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:47:40,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:40,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1643 [2020-10-12 09:47:40,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:40,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:47:40,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:40,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:47:40,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:40,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:40,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:40,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:40,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:40,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:40,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:40,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:40,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:40,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:40,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:40,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:40,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168154653] [2020-10-12 09:47:40,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:40,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:47:40,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499795706] [2020-10-12 09:47:40,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:47:40,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:40,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:47:40,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:47:40,988 INFO L87 Difference]: Start difference. First operand 497 states and 689 transitions. Second operand 28 states. [2020-10-12 09:47:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:42,215 INFO L93 Difference]: Finished difference Result 977 states and 1378 transitions. [2020-10-12 09:47:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:47:42,216 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2020-10-12 09:47:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:42,220 INFO L225 Difference]: With dead ends: 977 [2020-10-12 09:47:42,220 INFO L226 Difference]: Without dead ends: 535 [2020-10-12 09:47:42,222 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 [2020-10-12 09:47:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-12 09:47:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 517. [2020-10-12 09:47:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-10-12 09:47:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 717 transitions. [2020-10-12 09:47:42,246 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 717 transitions. Word has length 67 [2020-10-12 09:47:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:42,247 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 717 transitions. [2020-10-12 09:47:42,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:47:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 717 transitions. [2020-10-12 09:47:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 09:47:42,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:42,248 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:42,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:47:42,248 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:42,248 INFO L82 PathProgramCache]: Analyzing trace with hash -362368613, now seen corresponding path program 25 times [2020-10-12 09:47:42,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:42,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46681658] [2020-10-12 09:47:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:42,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:42,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:43,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:43,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 09:47:43,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:43,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1246 [2020-10-12 09:47:43,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:43,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:47:43,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:43,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:47:43,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:43,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:43,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:43,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:43,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:43,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:43,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:47:43,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:43,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:43,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:43,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:43,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:43,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46681658] [2020-10-12 09:47:43,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:43,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:47:43,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167892706] [2020-10-12 09:47:43,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:47:43,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:47:43,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:47:43,913 INFO L87 Difference]: Start difference. First operand 517 states and 717 transitions. Second operand 29 states. [2020-10-12 09:47:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:45,252 INFO L93 Difference]: Finished difference Result 1015 states and 1432 transitions. [2020-10-12 09:47:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:47:45,252 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 69 [2020-10-12 09:47:45,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:45,255 INFO L225 Difference]: With dead ends: 1015 [2020-10-12 09:47:45,255 INFO L226 Difference]: Without dead ends: 555 [2020-10-12 09:47:45,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:47:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-12 09:47:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 537. [2020-10-12 09:47:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-12 09:47:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 745 transitions. [2020-10-12 09:47:45,281 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 745 transitions. Word has length 69 [2020-10-12 09:47:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:45,282 INFO L479 AbstractCegarLoop]: Abstraction has 537 states and 745 transitions. [2020-10-12 09:47:45,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:47:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 745 transitions. [2020-10-12 09:47:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 09:47:45,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:45,283 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:45,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:47:45,283 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:45,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:45,283 INFO L82 PathProgramCache]: Analyzing trace with hash 166821113, now seen corresponding path program 26 times [2020-10-12 09:47:45,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:45,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727978119] [2020-10-12 09:47:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:45,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:45,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:46,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:46,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 09:47:46,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:46,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1601 [2020-10-12 09:47:46,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:47:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:46,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:47:46,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:47,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:47,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:47,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:47,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:47,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:47,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:47,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:47,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:47,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:47,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:47,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:47,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727978119] [2020-10-12 09:47:47,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:47,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:47:47,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570631421] [2020-10-12 09:47:47,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:47:47,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:47,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:47:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:47:47,356 INFO L87 Difference]: Start difference. First operand 537 states and 745 transitions. Second operand 30 states. [2020-10-12 09:47:48,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:48,529 INFO L93 Difference]: Finished difference Result 1053 states and 1486 transitions. [2020-10-12 09:47:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:47:48,529 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2020-10-12 09:47:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:48,533 INFO L225 Difference]: With dead ends: 1053 [2020-10-12 09:47:48,533 INFO L226 Difference]: Without dead ends: 575 [2020-10-12 09:47:48,535 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 [2020-10-12 09:47:48,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2020-10-12 09:47:48,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 557. [2020-10-12 09:47:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2020-10-12 09:47:48,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 773 transitions. [2020-10-12 09:47:48,562 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 773 transitions. Word has length 71 [2020-10-12 09:47:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:48,562 INFO L479 AbstractCegarLoop]: Abstraction has 557 states and 773 transitions. [2020-10-12 09:47:48,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:47:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 773 transitions. [2020-10-12 09:47:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 09:47:48,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:48,563 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:48,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:47:48,564 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:48,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1912006871, now seen corresponding path program 27 times [2020-10-12 09:47:48,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:48,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544902847] [2020-10-12 09:47:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:48,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:48,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:50,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:50,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 09:47:50,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:50,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1862 [2020-10-12 09:47:50,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:50,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:47:50,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:50,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:47:50,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:50,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:50,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:50,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:50,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:50,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:50,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:50,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:50,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:50,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:50,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:50,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:47:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:50,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544902847] [2020-10-12 09:47:51,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:51,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:47:51,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197402398] [2020-10-12 09:47:51,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:47:51,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:51,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:47:51,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:47:51,007 INFO L87 Difference]: Start difference. First operand 557 states and 773 transitions. Second operand 31 states. [2020-10-12 09:47:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:52,490 INFO L93 Difference]: Finished difference Result 1091 states and 1540 transitions. [2020-10-12 09:47:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:47:52,491 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-10-12 09:47:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:52,496 INFO L225 Difference]: With dead ends: 1091 [2020-10-12 09:47:52,496 INFO L226 Difference]: Without dead ends: 595 [2020-10-12 09:47:52,499 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 [2020-10-12 09:47:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-12 09:47:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 577. [2020-10-12 09:47:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-10-12 09:47:52,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 801 transitions. [2020-10-12 09:47:52,528 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 801 transitions. Word has length 73 [2020-10-12 09:47:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:52,529 INFO L479 AbstractCegarLoop]: Abstraction has 577 states and 801 transitions. [2020-10-12 09:47:52,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:47:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 801 transitions. [2020-10-12 09:47:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 09:47:52,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:52,530 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:52,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:47:52,530 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:52,530 INFO L82 PathProgramCache]: Analyzing trace with hash -296692427, now seen corresponding path program 28 times [2020-10-12 09:47:52,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:52,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475479918] [2020-10-12 09:47:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:52,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:52,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:54,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:54,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 09:47:54,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:54,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1958 [2020-10-12 09:47:54,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:54,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:47:54,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:54,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:47:54,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:55,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:55,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:55,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:55,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:55,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:55,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:55,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:55,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:55,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475479918] [2020-10-12 09:47:55,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:55,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:47:55,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402845124] [2020-10-12 09:47:55,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:47:55,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:55,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:47:55,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:47:55,102 INFO L87 Difference]: Start difference. First operand 577 states and 801 transitions. Second operand 32 states. [2020-10-12 09:47:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:56,596 INFO L93 Difference]: Finished difference Result 1129 states and 1594 transitions. [2020-10-12 09:47:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:47:56,596 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 75 [2020-10-12 09:47:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:56,599 INFO L225 Difference]: With dead ends: 1129 [2020-10-12 09:47:56,599 INFO L226 Difference]: Without dead ends: 615 [2020-10-12 09:47:56,601 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 [2020-10-12 09:47:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-10-12 09:47:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 597. [2020-10-12 09:47:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-10-12 09:47:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 829 transitions. [2020-10-12 09:47:56,630 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 829 transitions. Word has length 75 [2020-10-12 09:47:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:56,630 INFO L479 AbstractCegarLoop]: Abstraction has 597 states and 829 transitions. [2020-10-12 09:47:56,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:47:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 829 transitions. [2020-10-12 09:47:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 09:47:56,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:56,631 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:56,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:47:56,632 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:56,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:56,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1142873581, now seen corresponding path program 29 times [2020-10-12 09:47:56,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:56,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749377766] [2020-10-12 09:47:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:56,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:56,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:59,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:59,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 09:47:59,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:47:59,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2383 [2020-10-12 09:47:59,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:47:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:59,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:47:59,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:59,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:59,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:59,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:59,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:59,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:59,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:59,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:59,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:59,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:59,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:59,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:47:59,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749377766] [2020-10-12 09:47:59,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:59,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:47:59,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259094548] [2020-10-12 09:47:59,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:47:59,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:59,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:47:59,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:47:59,629 INFO L87 Difference]: Start difference. First operand 597 states and 829 transitions. Second operand 33 states. [2020-10-12 09:48:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:01,034 INFO L93 Difference]: Finished difference Result 1167 states and 1648 transitions. [2020-10-12 09:48:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:48:01,035 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 77 [2020-10-12 09:48:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:01,037 INFO L225 Difference]: With dead ends: 1167 [2020-10-12 09:48:01,037 INFO L226 Difference]: Without dead ends: 635 [2020-10-12 09:48:01,039 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 [2020-10-12 09:48:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2020-10-12 09:48:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 617. [2020-10-12 09:48:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-10-12 09:48:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 857 transitions. [2020-10-12 09:48:01,072 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 857 transitions. Word has length 77 [2020-10-12 09:48:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:01,073 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 857 transitions. [2020-10-12 09:48:01,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:48:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 857 transitions. [2020-10-12 09:48:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 09:48:01,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:01,074 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:01,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:48:01,075 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:01,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:01,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1720823665, now seen corresponding path program 30 times [2020-10-12 09:48:01,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:01,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081278861] [2020-10-12 09:48:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:01,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:03,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:03,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 09:48:03,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:03,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2176 [2020-10-12 09:48:03,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:03,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:48:03,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:03,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:48:03,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:03,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:03,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:03,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:03,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:03,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:03,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:03,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:03,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:03,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:03,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081278861] [2020-10-12 09:48:03,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:03,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:48:03,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811329241] [2020-10-12 09:48:03,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:48:03,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:03,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:48:03,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:48:03,911 INFO L87 Difference]: Start difference. First operand 617 states and 857 transitions. Second operand 34 states. [2020-10-12 09:48:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:05,645 INFO L93 Difference]: Finished difference Result 1205 states and 1702 transitions. [2020-10-12 09:48:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:48:05,645 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 79 [2020-10-12 09:48:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:05,649 INFO L225 Difference]: With dead ends: 1205 [2020-10-12 09:48:05,649 INFO L226 Difference]: Without dead ends: 655 [2020-10-12 09:48:05,651 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 [2020-10-12 09:48:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-10-12 09:48:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 637. [2020-10-12 09:48:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-12 09:48:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 885 transitions. [2020-10-12 09:48:05,681 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 885 transitions. Word has length 79 [2020-10-12 09:48:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:05,682 INFO L479 AbstractCegarLoop]: Abstraction has 637 states and 885 transitions. [2020-10-12 09:48:05,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:48:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 885 transitions. [2020-10-12 09:48:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 09:48:05,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:05,683 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:05,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:48:05,683 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:05,684 INFO L82 PathProgramCache]: Analyzing trace with hash 659840335, now seen corresponding path program 31 times [2020-10-12 09:48:05,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:05,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835079584] [2020-10-12 09:48:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:05,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:05,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:08,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:08,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 09:48:08,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:08,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2673 [2020-10-12 09:48:08,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:48:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:08,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:48:08,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:08,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:08,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:08,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:08,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:08,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:08,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:08,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:08,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:08,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:08,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:08,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:09,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835079584] [2020-10-12 09:48:09,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:09,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:48:09,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903792959] [2020-10-12 09:48:09,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:48:09,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:09,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:48:09,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:48:09,006 INFO L87 Difference]: Start difference. First operand 637 states and 885 transitions. Second operand 35 states. [2020-10-12 09:48:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:10,712 INFO L93 Difference]: Finished difference Result 1243 states and 1756 transitions. [2020-10-12 09:48:10,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:48:10,718 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 81 [2020-10-12 09:48:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:10,723 INFO L225 Difference]: With dead ends: 1243 [2020-10-12 09:48:10,724 INFO L226 Difference]: Without dead ends: 675 [2020-10-12 09:48:10,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:48:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-10-12 09:48:10,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 657. [2020-10-12 09:48:10,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-10-12 09:48:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 913 transitions. [2020-10-12 09:48:10,755 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 913 transitions. Word has length 81 [2020-10-12 09:48:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:10,756 INFO L479 AbstractCegarLoop]: Abstraction has 657 states and 913 transitions. [2020-10-12 09:48:10,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:48:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 913 transitions. [2020-10-12 09:48:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 09:48:10,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:10,757 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:10,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:48:10,757 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1037890643, now seen corresponding path program 32 times [2020-10-12 09:48:10,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:10,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053236246] [2020-10-12 09:48:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:10,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:10,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:13,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:13,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 09:48:13,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:13,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2683 [2020-10-12 09:48:13,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:13,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:48:13,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:13,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:48:13,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:14,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:14,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:14,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:14,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:14,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:14,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:14,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:14,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:14,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:14,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:14,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:14,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053236246] [2020-10-12 09:48:14,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:14,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:48:14,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060783696] [2020-10-12 09:48:14,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:48:14,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:14,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:48:14,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:48:14,129 INFO L87 Difference]: Start difference. First operand 657 states and 913 transitions. Second operand 36 states. [2020-10-12 09:48:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:16,047 INFO L93 Difference]: Finished difference Result 1281 states and 1810 transitions. [2020-10-12 09:48:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:48:16,048 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2020-10-12 09:48:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:16,051 INFO L225 Difference]: With dead ends: 1281 [2020-10-12 09:48:16,051 INFO L226 Difference]: Without dead ends: 695 [2020-10-12 09:48:16,053 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 [2020-10-12 09:48:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-10-12 09:48:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 677. [2020-10-12 09:48:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2020-10-12 09:48:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 941 transitions. [2020-10-12 09:48:16,088 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 941 transitions. Word has length 83 [2020-10-12 09:48:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:16,088 INFO L479 AbstractCegarLoop]: Abstraction has 677 states and 941 transitions. [2020-10-12 09:48:16,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:48:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 941 transitions. [2020-10-12 09:48:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 09:48:16,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:16,093 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:16,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:48:16,094 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:16,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:16,094 INFO L82 PathProgramCache]: Analyzing trace with hash -469788021, now seen corresponding path program 33 times [2020-10-12 09:48:16,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:16,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533098805] [2020-10-12 09:48:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:16,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:16,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:18,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:18,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 09:48:18,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:18,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2837 [2020-10-12 09:48:18,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:18,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:48:18,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:18,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:48:18,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:19,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:19,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:19,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:19,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:19,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:19,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:19,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:19,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:19,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:19,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:19,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:19,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533098805] [2020-10-12 09:48:19,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:19,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:48:19,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256642160] [2020-10-12 09:48:19,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:48:19,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:19,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:48:19,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:48:19,664 INFO L87 Difference]: Start difference. First operand 677 states and 941 transitions. Second operand 37 states. [2020-10-12 09:48:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:21,664 INFO L93 Difference]: Finished difference Result 1319 states and 1864 transitions. [2020-10-12 09:48:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:48:21,664 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 85 [2020-10-12 09:48:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:21,667 INFO L225 Difference]: With dead ends: 1319 [2020-10-12 09:48:21,668 INFO L226 Difference]: Without dead ends: 715 [2020-10-12 09:48:21,670 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 [2020-10-12 09:48:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-10-12 09:48:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 697. [2020-10-12 09:48:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-12 09:48:21,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 969 transitions. [2020-10-12 09:48:21,703 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 969 transitions. Word has length 85 [2020-10-12 09:48:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:21,703 INFO L479 AbstractCegarLoop]: Abstraction has 697 states and 969 transitions. [2020-10-12 09:48:21,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:48:21,703 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 969 transitions. [2020-10-12 09:48:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 09:48:21,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:21,704 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:21,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:48:21,704 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:21,705 INFO L82 PathProgramCache]: Analyzing trace with hash 15985129, now seen corresponding path program 34 times [2020-10-12 09:48:21,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:21,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732152615] [2020-10-12 09:48:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:21,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:21,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:24,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:24,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 09:48:24,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:24,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3105 [2020-10-12 09:48:24,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:24,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:48:24,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:24,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:48:24,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:25,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:25,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:25,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:25,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:25,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:25,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:25,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:25,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:25,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:25,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732152615] [2020-10-12 09:48:25,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:25,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:48:25,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916821593] [2020-10-12 09:48:25,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:48:25,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:25,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:48:25,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:48:25,546 INFO L87 Difference]: Start difference. First operand 697 states and 969 transitions. Second operand 38 states. [2020-10-12 09:48:27,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:27,552 INFO L93 Difference]: Finished difference Result 1357 states and 1918 transitions. [2020-10-12 09:48:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:48:27,552 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 87 [2020-10-12 09:48:27,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:27,555 INFO L225 Difference]: With dead ends: 1357 [2020-10-12 09:48:27,555 INFO L226 Difference]: Without dead ends: 735 [2020-10-12 09:48:27,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:48:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2020-10-12 09:48:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 717. [2020-10-12 09:48:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2020-10-12 09:48:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 997 transitions. [2020-10-12 09:48:27,590 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 997 transitions. Word has length 87 [2020-10-12 09:48:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:27,590 INFO L479 AbstractCegarLoop]: Abstraction has 717 states and 997 transitions. [2020-10-12 09:48:27,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:48:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 997 transitions. [2020-10-12 09:48:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 09:48:27,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:27,591 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:27,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:48:27,591 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:27,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:27,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1307452985, now seen corresponding path program 35 times [2020-10-12 09:48:27,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:27,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629242353] [2020-10-12 09:48:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:27,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:27,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:30,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:30,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 09:48:30,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:30,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3332 [2020-10-12 09:48:30,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:30,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 09:48:30,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:30,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 09:48:30,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:31,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:31,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:31,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:31,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:31,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:31,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:31,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:31,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:31,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:31,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:31,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:31,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629242353] [2020-10-12 09:48:31,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:31,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 09:48:31,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13883621] [2020-10-12 09:48:31,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 09:48:31,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:31,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 09:48:31,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:48:31,752 INFO L87 Difference]: Start difference. First operand 717 states and 997 transitions. Second operand 39 states. [2020-10-12 09:48:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:33,651 INFO L93 Difference]: Finished difference Result 1395 states and 1972 transitions. [2020-10-12 09:48:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:48:33,651 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 89 [2020-10-12 09:48:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:33,654 INFO L225 Difference]: With dead ends: 1395 [2020-10-12 09:48:33,654 INFO L226 Difference]: Without dead ends: 755 [2020-10-12 09:48:33,656 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 [2020-10-12 09:48:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2020-10-12 09:48:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 737. [2020-10-12 09:48:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2020-10-12 09:48:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1025 transitions. [2020-10-12 09:48:33,689 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1025 transitions. Word has length 89 [2020-10-12 09:48:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:33,689 INFO L479 AbstractCegarLoop]: Abstraction has 737 states and 1025 transitions. [2020-10-12 09:48:33,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 09:48:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1025 transitions. [2020-10-12 09:48:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 09:48:33,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:33,691 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:33,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:48:33,691 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:33,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1821160923, now seen corresponding path program 36 times [2020-10-12 09:48:33,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:33,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234434486] [2020-10-12 09:48:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:33,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:33,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:37,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:37,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 09:48:37,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:37,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3883 [2020-10-12 09:48:37,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:37,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 09:48:37,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:37,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 09:48:37,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:38,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:38,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:38,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:38,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:38,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:38,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:38,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:38,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:38,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:38,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:38,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:38,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234434486] [2020-10-12 09:48:38,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:38,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 09:48:38,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534723053] [2020-10-12 09:48:38,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 09:48:38,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:38,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 09:48:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:48:38,430 INFO L87 Difference]: Start difference. First operand 737 states and 1025 transitions. Second operand 40 states. [2020-10-12 09:48:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:40,770 INFO L93 Difference]: Finished difference Result 1433 states and 2026 transitions. [2020-10-12 09:48:40,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:48:40,770 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 91 [2020-10-12 09:48:40,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:40,773 INFO L225 Difference]: With dead ends: 1433 [2020-10-12 09:48:40,773 INFO L226 Difference]: Without dead ends: 775 [2020-10-12 09:48:40,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:48:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-12 09:48:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 757. [2020-10-12 09:48:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 757 states. [2020-10-12 09:48:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1053 transitions. [2020-10-12 09:48:40,812 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1053 transitions. Word has length 91 [2020-10-12 09:48:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:40,812 INFO L479 AbstractCegarLoop]: Abstraction has 757 states and 1053 transitions. [2020-10-12 09:48:40,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 09:48:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1053 transitions. [2020-10-12 09:48:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 09:48:40,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:40,814 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:40,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:48:40,814 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:40,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1573250301, now seen corresponding path program 37 times [2020-10-12 09:48:40,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:40,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519745849] [2020-10-12 09:48:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:40,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:40,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:44,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:44,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 09:48:44,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:44,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3859 [2020-10-12 09:48:44,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:44,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 09:48:44,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:44,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 09:48:44,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:45,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:45,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:45,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:45,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:45,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:45,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:45,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:45,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:45,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:45,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:45,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519745849] [2020-10-12 09:48:45,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:45,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 09:48:45,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748240270] [2020-10-12 09:48:45,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 09:48:45,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:45,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 09:48:45,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:48:45,566 INFO L87 Difference]: Start difference. First operand 757 states and 1053 transitions. Second operand 41 states. [2020-10-12 09:48:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:47,620 INFO L93 Difference]: Finished difference Result 1471 states and 2080 transitions. [2020-10-12 09:48:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 09:48:47,620 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 93 [2020-10-12 09:48:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:47,623 INFO L225 Difference]: With dead ends: 1471 [2020-10-12 09:48:47,624 INFO L226 Difference]: Without dead ends: 795 [2020-10-12 09:48:47,625 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 [2020-10-12 09:48:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-10-12 09:48:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 777. [2020-10-12 09:48:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2020-10-12 09:48:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1081 transitions. [2020-10-12 09:48:47,653 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1081 transitions. Word has length 93 [2020-10-12 09:48:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:47,653 INFO L479 AbstractCegarLoop]: Abstraction has 777 states and 1081 transitions. [2020-10-12 09:48:47,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 09:48:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1081 transitions. [2020-10-12 09:48:47,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 09:48:47,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:47,655 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:47,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 09:48:47,655 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash 445656161, now seen corresponding path program 38 times [2020-10-12 09:48:47,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:47,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776850861] [2020-10-12 09:48:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:47,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:47,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:51,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:51,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 09:48:51,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:51,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3998 [2020-10-12 09:48:51,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 09:48:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 09:48:51,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:52,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:48:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:52,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:52,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:52,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:48:52,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:48:52,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:48:52,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:52,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:48:52,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:48:52,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:48:52,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:48:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:48:52,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776850861] [2020-10-12 09:48:52,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:48:52,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 09:48:52,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692808685] [2020-10-12 09:48:52,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 09:48:52,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:48:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 09:48:52,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:48:52,605 INFO L87 Difference]: Start difference. First operand 777 states and 1081 transitions. Second operand 42 states. [2020-10-12 09:48:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:48:55,151 INFO L93 Difference]: Finished difference Result 1509 states and 2134 transitions. [2020-10-12 09:48:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 09:48:55,151 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 95 [2020-10-12 09:48:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:48:55,155 INFO L225 Difference]: With dead ends: 1509 [2020-10-12 09:48:55,155 INFO L226 Difference]: Without dead ends: 815 [2020-10-12 09:48:55,157 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 [2020-10-12 09:48:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2020-10-12 09:48:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 797. [2020-10-12 09:48:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 797 states. [2020-10-12 09:48:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1109 transitions. [2020-10-12 09:48:55,189 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1109 transitions. Word has length 95 [2020-10-12 09:48:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:48:55,190 INFO L479 AbstractCegarLoop]: Abstraction has 797 states and 1109 transitions. [2020-10-12 09:48:55,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 09:48:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1109 transitions. [2020-10-12 09:48:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 09:48:55,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:48:55,191 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:48:55,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 09:48:55,191 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:48:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:48:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash -710451649, now seen corresponding path program 39 times [2020-10-12 09:48:55,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:48:55,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344170411] [2020-10-12 09:48:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:48:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:48:55,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:55,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:48:59,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:48:59,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 09:48:59,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:48:59,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4363 [2020-10-12 09:48:59,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:48:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 09:48:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:48:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 09:48:59,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:00,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:00,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:00,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:00,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:00,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:00,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:00,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:00,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:00,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:00,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:00,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:00,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344170411] [2020-10-12 09:49:00,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:00,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 09:49:00,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864517064] [2020-10-12 09:49:00,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 09:49:00,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:00,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 09:49:00,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:49:00,561 INFO L87 Difference]: Start difference. First operand 797 states and 1109 transitions. Second operand 43 states. [2020-10-12 09:49:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:02,757 INFO L93 Difference]: Finished difference Result 1547 states and 2188 transitions. [2020-10-12 09:49:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 09:49:02,758 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 97 [2020-10-12 09:49:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:02,761 INFO L225 Difference]: With dead ends: 1547 [2020-10-12 09:49:02,761 INFO L226 Difference]: Without dead ends: 835 [2020-10-12 09:49:02,763 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 [2020-10-12 09:49:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2020-10-12 09:49:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 817. [2020-10-12 09:49:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2020-10-12 09:49:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1137 transitions. [2020-10-12 09:49:02,802 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1137 transitions. Word has length 97 [2020-10-12 09:49:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:02,802 INFO L479 AbstractCegarLoop]: Abstraction has 817 states and 1137 transitions. [2020-10-12 09:49:02,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 09:49:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1137 transitions. [2020-10-12 09:49:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 09:49:02,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:02,803 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:02,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 09:49:02,804 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:02,804 INFO L82 PathProgramCache]: Analyzing trace with hash 666472605, now seen corresponding path program 40 times [2020-10-12 09:49:02,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:02,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956354254] [2020-10-12 09:49:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:02,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:02,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:07,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:07,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 09:49:07,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:07,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4699 [2020-10-12 09:49:07,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:07,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 09:49:07,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:07,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 09:49:07,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:08,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:08,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:08,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:08,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:08,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:08,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:08,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:08,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:08,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:08,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:08,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956354254] [2020-10-12 09:49:08,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:08,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 09:49:08,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234578438] [2020-10-12 09:49:08,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 09:49:08,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:08,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 09:49:08,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:49:08,550 INFO L87 Difference]: Start difference. First operand 817 states and 1137 transitions. Second operand 44 states. [2020-10-12 09:49:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:10,482 INFO L93 Difference]: Finished difference Result 1585 states and 2242 transitions. [2020-10-12 09:49:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 09:49:10,483 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 99 [2020-10-12 09:49:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:10,486 INFO L225 Difference]: With dead ends: 1585 [2020-10-12 09:49:10,486 INFO L226 Difference]: Without dead ends: 855 [2020-10-12 09:49:10,489 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 [2020-10-12 09:49:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-10-12 09:49:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 837. [2020-10-12 09:49:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2020-10-12 09:49:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1165 transitions. [2020-10-12 09:49:10,523 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1165 transitions. Word has length 99 [2020-10-12 09:49:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:10,524 INFO L479 AbstractCegarLoop]: Abstraction has 837 states and 1165 transitions. [2020-10-12 09:49:10,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 09:49:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1165 transitions. [2020-10-12 09:49:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-12 09:49:10,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:10,525 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:10,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 09:49:10,525 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1040753531, now seen corresponding path program 41 times [2020-10-12 09:49:10,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:10,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544250018] [2020-10-12 09:49:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:10,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:10,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:15,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:15,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-12 09:49:15,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:15,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4920 [2020-10-12 09:49:15,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 09:49:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 09:49:15,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:16,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:16,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:16,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:16,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:16,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:16,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:16,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:16,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:16,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:16,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:16,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:16,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544250018] [2020-10-12 09:49:16,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:16,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 09:49:16,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887690891] [2020-10-12 09:49:16,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 09:49:16,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:16,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 09:49:16,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:49:16,549 INFO L87 Difference]: Start difference. First operand 837 states and 1165 transitions. Second operand 45 states. [2020-10-12 09:49:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:18,913 INFO L93 Difference]: Finished difference Result 1623 states and 2296 transitions. [2020-10-12 09:49:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 09:49:18,914 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 101 [2020-10-12 09:49:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:18,918 INFO L225 Difference]: With dead ends: 1623 [2020-10-12 09:49:18,918 INFO L226 Difference]: Without dead ends: 875 [2020-10-12 09:49:18,920 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 [2020-10-12 09:49:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2020-10-12 09:49:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 857. [2020-10-12 09:49:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-10-12 09:49:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1193 transitions. [2020-10-12 09:49:18,953 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1193 transitions. Word has length 101 [2020-10-12 09:49:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:18,954 INFO L479 AbstractCegarLoop]: Abstraction has 857 states and 1193 transitions. [2020-10-12 09:49:18,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 09:49:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1193 transitions. [2020-10-12 09:49:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-12 09:49:18,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:18,954 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:18,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 09:49:18,955 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:18,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash -52529447, now seen corresponding path program 42 times [2020-10-12 09:49:18,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:18,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884622230] [2020-10-12 09:49:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:18,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:18,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:23,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:23,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-12 09:49:23,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:23,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 09:49:23,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:23,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 09:49:23,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:23,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 09:49:23,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:25,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:25,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:25,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:25,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:25,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:25,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:49:25,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:25,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884622230] [2020-10-12 09:49:25,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:25,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 09:49:25,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516415695] [2020-10-12 09:49:25,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 09:49:25,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:25,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 09:49:25,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:49:25,120 INFO L87 Difference]: Start difference. First operand 857 states and 1193 transitions. Second operand 46 states. [2020-10-12 09:49:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:27,636 INFO L93 Difference]: Finished difference Result 1661 states and 2350 transitions. [2020-10-12 09:49:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 09:49:27,636 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 103 [2020-10-12 09:49:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:27,640 INFO L225 Difference]: With dead ends: 1661 [2020-10-12 09:49:27,640 INFO L226 Difference]: Without dead ends: 895 [2020-10-12 09:49:27,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:49:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2020-10-12 09:49:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 877. [2020-10-12 09:49:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-10-12 09:49:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1221 transitions. [2020-10-12 09:49:27,677 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1221 transitions. Word has length 103 [2020-10-12 09:49:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:27,678 INFO L479 AbstractCegarLoop]: Abstraction has 877 states and 1221 transitions. [2020-10-12 09:49:27,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 09:49:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1221 transitions. [2020-10-12 09:49:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-12 09:49:27,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:27,679 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:27,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 09:49:27,679 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1569516215, now seen corresponding path program 43 times [2020-10-12 09:49:27,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:27,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257357273] [2020-10-12 09:49:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:27,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:27,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:32,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:32,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-12 09:49:32,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:32,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:49:32,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 09:49:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 09:49:32,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:33,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:33,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:33,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:33,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:33,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:33,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:33,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:33,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:33,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257357273] [2020-10-12 09:49:33,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:33,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 09:49:33,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606636452] [2020-10-12 09:49:33,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 09:49:33,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:33,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 09:49:33,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:49:33,895 INFO L87 Difference]: Start difference. First operand 877 states and 1221 transitions. Second operand 47 states. [2020-10-12 09:49:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:36,466 INFO L93 Difference]: Finished difference Result 1699 states and 2404 transitions. [2020-10-12 09:49:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 09:49:36,466 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 105 [2020-10-12 09:49:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:36,470 INFO L225 Difference]: With dead ends: 1699 [2020-10-12 09:49:36,470 INFO L226 Difference]: Without dead ends: 915 [2020-10-12 09:49:36,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:49:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2020-10-12 09:49:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 897. [2020-10-12 09:49:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-10-12 09:49:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1249 transitions. [2020-10-12 09:49:36,508 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1249 transitions. Word has length 105 [2020-10-12 09:49:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:36,509 INFO L479 AbstractCegarLoop]: Abstraction has 897 states and 1249 transitions. [2020-10-12 09:49:36,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 09:49:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1249 transitions. [2020-10-12 09:49:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-12 09:49:36,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:36,510 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:36,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 09:49:36,510 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1282268949, now seen corresponding path program 44 times [2020-10-12 09:49:36,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:36,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713082093] [2020-10-12 09:49:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:36,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:36,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:41,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:41,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-12 09:49:41,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 09:49:41,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 09:49:41,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:41,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 09:49:41,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:42,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:42,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:42,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:42,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:42,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:42,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:42,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:42,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:42,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:42,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:42,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:42,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713082093] [2020-10-12 09:49:42,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:42,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 09:49:42,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519534798] [2020-10-12 09:49:42,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 09:49:42,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:42,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 09:49:42,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:49:42,831 INFO L87 Difference]: Start difference. First operand 897 states and 1249 transitions. Second operand 48 states. [2020-10-12 09:49:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:45,061 INFO L93 Difference]: Finished difference Result 1737 states and 2458 transitions. [2020-10-12 09:49:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 09:49:45,061 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 107 [2020-10-12 09:49:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:45,065 INFO L225 Difference]: With dead ends: 1737 [2020-10-12 09:49:45,065 INFO L226 Difference]: Without dead ends: 935 [2020-10-12 09:49:45,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:49:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2020-10-12 09:49:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 917. [2020-10-12 09:49:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2020-10-12 09:49:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1277 transitions. [2020-10-12 09:49:45,117 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1277 transitions. Word has length 107 [2020-10-12 09:49:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:45,117 INFO L479 AbstractCegarLoop]: Abstraction has 917 states and 1277 transitions. [2020-10-12 09:49:45,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 09:49:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1277 transitions. [2020-10-12 09:49:45,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-12 09:49:45,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:45,118 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:45,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 09:49:45,119 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:45,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:45,119 INFO L82 PathProgramCache]: Analyzing trace with hash 115553267, now seen corresponding path program 45 times [2020-10-12 09:49:45,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:45,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150837162] [2020-10-12 09:49:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:45,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:45,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:50,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:50,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-12 09:49:50,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:50,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-12 09:49:50,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:50,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 09:49:50,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:50,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 09:49:50,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:51,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:49:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:51,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:51,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:51,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:49:51,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:49:51,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:49:51,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:51,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:49:51,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:49:51,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:49:51,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:49:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:49:51,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150837162] [2020-10-12 09:49:51,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:49:51,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 09:49:51,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543527043] [2020-10-12 09:49:51,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 09:49:51,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:49:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 09:49:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:49:51,478 INFO L87 Difference]: Start difference. First operand 917 states and 1277 transitions. Second operand 49 states. [2020-10-12 09:49:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:49:54,080 INFO L93 Difference]: Finished difference Result 1775 states and 2512 transitions. [2020-10-12 09:49:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 09:49:54,080 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 109 [2020-10-12 09:49:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:49:54,084 INFO L225 Difference]: With dead ends: 1775 [2020-10-12 09:49:54,084 INFO L226 Difference]: Without dead ends: 955 [2020-10-12 09:49:54,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:49:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-10-12 09:49:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 937. [2020-10-12 09:49:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2020-10-12 09:49:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1305 transitions. [2020-10-12 09:49:54,125 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1305 transitions. Word has length 109 [2020-10-12 09:49:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:49:54,126 INFO L479 AbstractCegarLoop]: Abstraction has 937 states and 1305 transitions. [2020-10-12 09:49:54,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 09:49:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1305 transitions. [2020-10-12 09:49:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-12 09:49:54,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:49:54,127 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:49:54,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 09:49:54,127 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:49:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:49:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash -111752879, now seen corresponding path program 46 times [2020-10-12 09:49:54,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:49:54,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76539933] [2020-10-12 09:49:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:49:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:49:54,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:54,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:49:59,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:49:59,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 09:49:59,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:49:59,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 09:49:59,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:49:59,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 09:49:59,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:49:59,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 09:49:59,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:00,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:00,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:00,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:00,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:00,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:00,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:00,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:00,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:00,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:00,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:00,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:00,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76539933] [2020-10-12 09:50:00,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:00,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 09:50:00,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678950347] [2020-10-12 09:50:00,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 09:50:00,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:00,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 09:50:00,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:50:00,518 INFO L87 Difference]: Start difference. First operand 937 states and 1305 transitions. Second operand 50 states. [2020-10-12 09:50:03,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:03,227 INFO L93 Difference]: Finished difference Result 1813 states and 2566 transitions. [2020-10-12 09:50:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 09:50:03,228 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2020-10-12 09:50:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:03,233 INFO L225 Difference]: With dead ends: 1813 [2020-10-12 09:50:03,233 INFO L226 Difference]: Without dead ends: 975 [2020-10-12 09:50:03,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:50:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2020-10-12 09:50:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 957. [2020-10-12 09:50:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2020-10-12 09:50:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1333 transitions. [2020-10-12 09:50:03,271 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1333 transitions. Word has length 111 [2020-10-12 09:50:03,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:03,271 INFO L479 AbstractCegarLoop]: Abstraction has 957 states and 1333 transitions. [2020-10-12 09:50:03,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 09:50:03,272 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1333 transitions. [2020-10-12 09:50:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 09:50:03,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:03,273 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:03,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 09:50:03,273 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash 490372911, now seen corresponding path program 47 times [2020-10-12 09:50:03,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:03,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000854736] [2020-10-12 09:50:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:03,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:03,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:08,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:08,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-12 09:50:08,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:08,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 09:50:08,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 09:50:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 09:50:08,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:09,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:09,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:09,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:09,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:09,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:09,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:09,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:09,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:09,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:09,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:09,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:09,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000854736] [2020-10-12 09:50:09,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:09,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 09:50:09,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238573558] [2020-10-12 09:50:09,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 09:50:09,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:09,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 09:50:09,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 09:50:09,728 INFO L87 Difference]: Start difference. First operand 957 states and 1333 transitions. Second operand 51 states. [2020-10-12 09:50:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:12,505 INFO L93 Difference]: Finished difference Result 1851 states and 2620 transitions. [2020-10-12 09:50:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 09:50:12,506 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 113 [2020-10-12 09:50:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:12,510 INFO L225 Difference]: With dead ends: 1851 [2020-10-12 09:50:12,510 INFO L226 Difference]: Without dead ends: 995 [2020-10-12 09:50:12,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 09:50:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2020-10-12 09:50:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 977. [2020-10-12 09:50:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2020-10-12 09:50:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1361 transitions. [2020-10-12 09:50:12,550 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1361 transitions. Word has length 113 [2020-10-12 09:50:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:12,550 INFO L479 AbstractCegarLoop]: Abstraction has 977 states and 1361 transitions. [2020-10-12 09:50:12,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 09:50:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1361 transitions. [2020-10-12 09:50:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-12 09:50:12,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:12,552 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:12,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 09:50:12,552 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:12,552 INFO L82 PathProgramCache]: Analyzing trace with hash -687327859, now seen corresponding path program 48 times [2020-10-12 09:50:12,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:12,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036680523] [2020-10-12 09:50:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:12,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:12,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:17,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:17,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-12 09:50:17,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:17,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 09:50:17,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:17,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 09:50:17,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:17,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-12 09:50:17,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:19,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:19,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:19,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:19,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:19,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:19,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:19,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:19,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036680523] [2020-10-12 09:50:19,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:19,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 09:50:19,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820709455] [2020-10-12 09:50:19,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 09:50:19,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:19,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 09:50:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 09:50:19,077 INFO L87 Difference]: Start difference. First operand 977 states and 1361 transitions. Second operand 52 states. [2020-10-12 09:50:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:22,217 INFO L93 Difference]: Finished difference Result 1889 states and 2674 transitions. [2020-10-12 09:50:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 09:50:22,217 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 115 [2020-10-12 09:50:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:22,222 INFO L225 Difference]: With dead ends: 1889 [2020-10-12 09:50:22,222 INFO L226 Difference]: Without dead ends: 1015 [2020-10-12 09:50:22,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 09:50:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2020-10-12 09:50:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 997. [2020-10-12 09:50:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-10-12 09:50:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1389 transitions. [2020-10-12 09:50:22,267 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1389 transitions. Word has length 115 [2020-10-12 09:50:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:22,267 INFO L479 AbstractCegarLoop]: Abstraction has 997 states and 1389 transitions. [2020-10-12 09:50:22,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 09:50:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1389 transitions. [2020-10-12 09:50:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-12 09:50:22,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:22,268 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:22,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 09:50:22,269 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:22,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1413598315, now seen corresponding path program 49 times [2020-10-12 09:50:22,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:22,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784293614] [2020-10-12 09:50:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:22,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:22,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:27,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:27,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-12 09:50:27,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:27,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-12 09:50:27,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 09:50:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:27,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-12 09:50:27,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:28,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:28,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:28,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:28,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:28,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:28,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:28,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:28,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784293614] [2020-10-12 09:50:28,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:28,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 09:50:28,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146232161] [2020-10-12 09:50:28,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 09:50:28,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 09:50:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:50:28,883 INFO L87 Difference]: Start difference. First operand 997 states and 1389 transitions. Second operand 53 states. [2020-10-12 09:50:32,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:32,263 INFO L93 Difference]: Finished difference Result 1927 states and 2728 transitions. [2020-10-12 09:50:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 09:50:32,263 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 117 [2020-10-12 09:50:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:32,267 INFO L225 Difference]: With dead ends: 1927 [2020-10-12 09:50:32,267 INFO L226 Difference]: Without dead ends: 1035 [2020-10-12 09:50:32,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:50:32,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-10-12 09:50:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1017. [2020-10-12 09:50:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1017 states. [2020-10-12 09:50:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1417 transitions. [2020-10-12 09:50:32,311 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1417 transitions. Word has length 117 [2020-10-12 09:50:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:32,312 INFO L479 AbstractCegarLoop]: Abstraction has 1017 states and 1417 transitions. [2020-10-12 09:50:32,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 09:50:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1417 transitions. [2020-10-12 09:50:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-12 09:50:32,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:32,313 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:32,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 09:50:32,313 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:32,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1769022409, now seen corresponding path program 50 times [2020-10-12 09:50:32,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:32,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873323152] [2020-10-12 09:50:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:32,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:32,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:37,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:37,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-12 09:50:37,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:37,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:50:37,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:37,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 09:50:37,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:37,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 09:50:37,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:38,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:38,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:38,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:38,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:38,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:38,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:50:38,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:38,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:38,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:38,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:38,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:38,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873323152] [2020-10-12 09:50:38,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:38,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 09:50:38,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325012926] [2020-10-12 09:50:38,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 09:50:38,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:38,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 09:50:38,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:50:38,948 INFO L87 Difference]: Start difference. First operand 1017 states and 1417 transitions. Second operand 54 states. [2020-10-12 09:50:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:42,350 INFO L93 Difference]: Finished difference Result 1965 states and 2782 transitions. [2020-10-12 09:50:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 09:50:42,351 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 119 [2020-10-12 09:50:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:42,354 INFO L225 Difference]: With dead ends: 1965 [2020-10-12 09:50:42,355 INFO L226 Difference]: Without dead ends: 1055 [2020-10-12 09:50:42,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:50:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2020-10-12 09:50:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1037. [2020-10-12 09:50:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2020-10-12 09:50:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1445 transitions. [2020-10-12 09:50:42,402 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1445 transitions. Word has length 119 [2020-10-12 09:50:42,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:42,402 INFO L479 AbstractCegarLoop]: Abstraction has 1037 states and 1445 transitions. [2020-10-12 09:50:42,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 09:50:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1445 transitions. [2020-10-12 09:50:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-12 09:50:42,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:42,403 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:42,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 09:50:42,403 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:42,403 INFO L82 PathProgramCache]: Analyzing trace with hash -265806937, now seen corresponding path program 51 times [2020-10-12 09:50:42,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:42,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075454125] [2020-10-12 09:50:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:42,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:42,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:47,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:47,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-12 09:50:47,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:50:47,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 09:50:47,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:47,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 09:50:47,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:50:47,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-12 09:50:47,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:49,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:50:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:49,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:49,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:50:49,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:50:49,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:50:49,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:50:49,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:50:49,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:50:49,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:50:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:50:49,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:50:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:50:49,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075454125] [2020-10-12 09:50:49,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:50:49,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 09:50:49,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680172123] [2020-10-12 09:50:49,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 09:50:49,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:50:49,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 09:50:49,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 09:50:49,088 INFO L87 Difference]: Start difference. First operand 1037 states and 1445 transitions. Second operand 55 states. [2020-10-12 09:50:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:50:52,396 INFO L93 Difference]: Finished difference Result 2003 states and 2836 transitions. [2020-10-12 09:50:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 09:50:52,397 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 121 [2020-10-12 09:50:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:50:52,400 INFO L225 Difference]: With dead ends: 2003 [2020-10-12 09:50:52,400 INFO L226 Difference]: Without dead ends: 1075 [2020-10-12 09:50:52,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 09:50:52,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2020-10-12 09:50:52,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1057. [2020-10-12 09:50:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1057 states. [2020-10-12 09:50:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1473 transitions. [2020-10-12 09:50:52,458 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1473 transitions. Word has length 121 [2020-10-12 09:50:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:50:52,459 INFO L479 AbstractCegarLoop]: Abstraction has 1057 states and 1473 transitions. [2020-10-12 09:50:52,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 09:50:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1473 transitions. [2020-10-12 09:50:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-12 09:50:52,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:50:52,460 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:50:52,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 09:50:52,460 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:50:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:50:52,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1526688763, now seen corresponding path program 52 times [2020-10-12 09:50:52,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:50:52,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186737277] [2020-10-12 09:50:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:50:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:50:52,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:50:52,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking...