/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-loops/overflow_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:33:28,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:33:28,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:33:28,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:33:28,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:33:28,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:33:28,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:33:28,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:33:28,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:33:28,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:33:28,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:33:28,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:33:28,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:33:28,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:33:28,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:33:28,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:33:28,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:33:28,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:33:28,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:33:28,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:33:28,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:33:28,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:33:28,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:33:28,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:33:28,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:33:28,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:33:28,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:33:28,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:33:28,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:33:28,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:33:28,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:33:28,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:33:28,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:33:28,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:33:28,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:33:28,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:33:28,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:33:28,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:33:28,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:33:28,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:33:28,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:33:28,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 18:33:29,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:33:29,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:33:29,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:33:29,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:33:29,008 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:33:29,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:33:29,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:33:29,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:33:29,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:33:29,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:33:29,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:33:29,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:33:29,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:33:29,009 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:33:29,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:33:29,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:33:29,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:33:29,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:33:29,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:33:29,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:33:29,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:33:29,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:33:29,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:33:29,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:33:29,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:33:29,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:33:29,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:33:29,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:33:29,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:33:29,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:33:29,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:33:29,334 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:33:29,338 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:33:29,340 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:33:29,340 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:33:29,341 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/overflow_1-2.c [2020-10-14 18:33:29,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6607b50cc/a58e70ebc3b545488bbf413ae55bf990/FLAG861a5a823 [2020-10-14 18:33:29,856 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:33:29,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/overflow_1-2.c [2020-10-14 18:33:29,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6607b50cc/a58e70ebc3b545488bbf413ae55bf990/FLAG861a5a823 [2020-10-14 18:33:30,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6607b50cc/a58e70ebc3b545488bbf413ae55bf990 [2020-10-14 18:33:30,243 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:33:30,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:33:30,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:33:30,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:33:30,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:33:30,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:33:30" (1/1) ... [2020-10-14 18:33:30,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7468b030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30, skipping insertion in model container [2020-10-14 18:33:30,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:33:30" (1/1) ... [2020-10-14 18:33:30,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:33:30,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:33:30,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:33:30,444 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:33:30,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:33:30,473 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:33:30,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30 WrapperNode [2020-10-14 18:33:30,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:33:30,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:33:30,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:33:30,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:33:30,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30" (1/1) ... [2020-10-14 18:33:30,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30" (1/1) ... [2020-10-14 18:33:30,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30" (1/1) ... [2020-10-14 18:33:30,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30" (1/1) ... [2020-10-14 18:33:30,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30" (1/1) ... [2020-10-14 18:33:30,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30" (1/1) ... [2020-10-14 18:33:30,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30" (1/1) ... [2020-10-14 18:33:30,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:33:30,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:33:30,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:33:30,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:33:30,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:33:30,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:33:30,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:33:30,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:33:30,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:33:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:33:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:33:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:33:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:33:30,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:33:30,821 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:33:30,821 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 18:33:30,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:33:30 BoogieIcfgContainer [2020-10-14 18:33:30,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:33:30,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:33:30,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:33:30,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:33:30,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:33:30" (1/3) ... [2020-10-14 18:33:30,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2af43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:33:30, skipping insertion in model container [2020-10-14 18:33:30,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:30" (2/3) ... [2020-10-14 18:33:30,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2af43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:33:30, skipping insertion in model container [2020-10-14 18:33:30,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:33:30" (3/3) ... [2020-10-14 18:33:30,834 INFO L109 eAbstractionObserver]: Analyzing ICFG overflow_1-2.c [2020-10-14 18:33:30,844 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:33:30,852 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:33:30,866 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:33:30,887 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:33:30,888 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:33:30,888 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:33:30,888 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:33:30,888 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:33:30,888 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:33:30,889 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:33:30,889 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:33:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-14 18:33:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 18:33:30,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:30,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:30,913 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:30,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-14 18:33:30,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:30,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122936706] [2020-10-14 18:33:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:31,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:31,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 18:33:31,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:31,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-14 18:33:31,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:31,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:31,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:33:31,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:31,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:33:31,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:33:31,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:31,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:31,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:31,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:31,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:31,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:33:31,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:31,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:31,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:31,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:31,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:31,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:33:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:31,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122936706] [2020-10-14 18:33:31,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:33:31,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 18:33:31,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742956323] [2020-10-14 18:33:31,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 18:33:31,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:31,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 18:33:31,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 18:33:31,308 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-14 18:33:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:31,350 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-14 18:33:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 18:33:31,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 18:33:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:31,364 INFO L225 Difference]: With dead ends: 29 [2020-10-14 18:33:31,364 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 18:33:31,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 18:33:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 18:33:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 18:33:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 18:33:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-14 18:33:31,415 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-14 18:33:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:31,416 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-14 18:33:31,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 18:33:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-14 18:33:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 18:33:31,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:31,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:31,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:33:31,418 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:31,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:31,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-14 18:33:31,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:31,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531978111] [2020-10-14 18:33:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:31,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:31,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:31,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 18:33:31,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-14 18:33:31,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:31,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:33:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:31,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 18:33:31,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:31,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:31,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:31,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:31,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:31,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:31,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:33:31,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:31,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:31,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:31,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:31,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:33:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:31,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531978111] [2020-10-14 18:33:31,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:31,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 18:33:31,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645867950] [2020-10-14 18:33:31,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 18:33:31,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:31,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 18:33:31,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:33:31,771 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-10-14 18:33:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:31,797 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-14 18:33:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 18:33:31,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-14 18:33:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:31,799 INFO L225 Difference]: With dead ends: 18 [2020-10-14 18:33:31,799 INFO L226 Difference]: Without dead ends: 13 [2020-10-14 18:33:31,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:33:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-14 18:33:31,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-14 18:33:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 18:33:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-14 18:33:31,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-14 18:33:31,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:31,806 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-14 18:33:31,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 18:33:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-14 18:33:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 18:33:31,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:31,808 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:31,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:33:31,808 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:31,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-14 18:33:31,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:31,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701108742] [2020-10-14 18:33:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:31,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:31,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:31,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 18:33:31,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:31,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-14 18:33:31,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:31,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:33:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:31,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 18:33:31,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:32,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:32,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:32,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:32,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:32,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:32,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:33:32,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:32,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:32,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:32,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701108742] [2020-10-14 18:33:32,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:32,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 18:33:32,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667323891] [2020-10-14 18:33:32,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:33:32,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:32,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:33:32,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:33:32,049 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-10-14 18:33:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:32,072 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-14 18:33:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:33:32,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-14 18:33:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:32,074 INFO L225 Difference]: With dead ends: 19 [2020-10-14 18:33:32,074 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 18:33:32,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:33:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 18:33:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 18:33:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 18:33:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-14 18:33:32,080 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-14 18:33:32,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:32,081 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-14 18:33:32,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:33:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-14 18:33:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 18:33:32,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:32,082 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:32,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:33:32,082 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:32,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-14 18:33:32,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:32,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345362385] [2020-10-14 18:33:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:32,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:32,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:32,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 18:33:32,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:32,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-14 18:33:32,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:32,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:33:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:32,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 18:33:32,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:32,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:32,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:32,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:32,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:32,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:32,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:32,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:32,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:32,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:32,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345362385] [2020-10-14 18:33:32,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:32,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 18:33:32,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364975150] [2020-10-14 18:33:32,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:33:32,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:32,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:33:32,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:33:32,364 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-10-14 18:33:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:32,398 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-14 18:33:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:33:32,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-14 18:33:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:32,400 INFO L225 Difference]: With dead ends: 20 [2020-10-14 18:33:32,400 INFO L226 Difference]: Without dead ends: 15 [2020-10-14 18:33:32,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:33:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-14 18:33:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-14 18:33:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 18:33:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-14 18:33:32,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-14 18:33:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:32,406 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-14 18:33:32,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:33:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-14 18:33:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 18:33:32,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:32,407 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:32,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:33:32,408 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:32,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-10-14 18:33:32,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:32,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550583399] [2020-10-14 18:33:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:32,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:32,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:32,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 18:33:32,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:32,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-14 18:33:32,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:32,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:32,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:33:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:33:32,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:32,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:32,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:32,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:32,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:32,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:32,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:33:32,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:32,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:32,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:32,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550583399] [2020-10-14 18:33:32,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:32,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:33:32,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838200564] [2020-10-14 18:33:32,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:33:32,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:33:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:33:32,690 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-10-14 18:33:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:32,737 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-14 18:33:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:33:32,737 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-14 18:33:32,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:32,738 INFO L225 Difference]: With dead ends: 21 [2020-10-14 18:33:32,738 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 18:33:32,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:33:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 18:33:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 18:33:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 18:33:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-14 18:33:32,744 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-14 18:33:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:32,744 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-14 18:33:32,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:33:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-14 18:33:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 18:33:32,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:32,745 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:32,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:33:32,746 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:32,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-10-14 18:33:32,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:32,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928671312] [2020-10-14 18:33:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:32,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:32,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 18:33:32,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:32,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-14 18:33:32,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:32,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:33:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:32,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:33:32,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:32,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:32,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:32,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:32,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:32,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:32,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:32,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:32,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:32,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:32,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:32,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:32,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:32,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928671312] [2020-10-14 18:33:32,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:32,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:33:32,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462298898] [2020-10-14 18:33:32,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:33:32,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:32,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:33:32,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:33:32,964 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2020-10-14 18:33:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:33,017 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-14 18:33:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:33:33,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-14 18:33:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:33,018 INFO L225 Difference]: With dead ends: 22 [2020-10-14 18:33:33,019 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 18:33:33,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:33:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 18:33:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 18:33:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 18:33:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-14 18:33:33,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-14 18:33:33,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:33,026 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-14 18:33:33,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:33:33,026 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-14 18:33:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 18:33:33,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:33,027 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:33,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:33:33,028 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2020-10-14 18:33:33,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:33,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938906944] [2020-10-14 18:33:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:33,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:33,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:33,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 18:33:33,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:33,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-14 18:33:33,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:33,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:33,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:33:33,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:33,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:33:33,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:33,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:33,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:33,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:33,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:33,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:33,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:33:33,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:33,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:33,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:33,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:33,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:33,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:33,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938906944] [2020-10-14 18:33:33,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:33,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:33:33,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838690306] [2020-10-14 18:33:33,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:33:33,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:33,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:33:33,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:33:33,377 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-10-14 18:33:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:33,447 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-14 18:33:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:33:33,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-14 18:33:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:33,450 INFO L225 Difference]: With dead ends: 23 [2020-10-14 18:33:33,450 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 18:33:33,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:33:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 18:33:33,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 18:33:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 18:33:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-14 18:33:33,461 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-14 18:33:33,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:33,461 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-14 18:33:33,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:33:33,461 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-14 18:33:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 18:33:33,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:33,466 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:33,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:33:33,466 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:33,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:33,467 INFO L82 PathProgramCache]: Analyzing trace with hash -6162383, now seen corresponding path program 7 times [2020-10-14 18:33:33,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:33,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715738954] [2020-10-14 18:33:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:33,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:33,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:33,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 18:33:33,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:33,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-14 18:33:33,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:33,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:33:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 18:33:33,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:33,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:33,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:33,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:33,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:33,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:33,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:33,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:33,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:33,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:33,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:33,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:33,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:33,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715738954] [2020-10-14 18:33:33,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:33,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:33:33,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554040048] [2020-10-14 18:33:33,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:33:33,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:33,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:33:33,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:33:33,805 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2020-10-14 18:33:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:33,873 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-14 18:33:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:33:33,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-14 18:33:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:33,874 INFO L225 Difference]: With dead ends: 24 [2020-10-14 18:33:33,875 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 18:33:33,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:33:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 18:33:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 18:33:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 18:33:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-14 18:33:33,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-14 18:33:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:33,881 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-14 18:33:33,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:33:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-14 18:33:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 18:33:33,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:33,882 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:33,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:33:33,882 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:33,883 INFO L82 PathProgramCache]: Analyzing trace with hash -154572610, now seen corresponding path program 8 times [2020-10-14 18:33:33,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:33,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498707661] [2020-10-14 18:33:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:33,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:34,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:34,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 18:33:34,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:34,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-14 18:33:34,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:34,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:34,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:33:34,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:34,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:33:34,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:34,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:34,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:34,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:34,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:34,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:34,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:34,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:34,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:34,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:34,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:34,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498707661] [2020-10-14 18:33:34,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:34,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:33:34,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644572982] [2020-10-14 18:33:34,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:33:34,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:33:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:33:34,206 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2020-10-14 18:33:34,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:34,283 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-14 18:33:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:33:34,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-14 18:33:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:34,285 INFO L225 Difference]: With dead ends: 25 [2020-10-14 18:33:34,285 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 18:33:34,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:33:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 18:33:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 18:33:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 18:33:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-14 18:33:34,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-14 18:33:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:34,291 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-14 18:33:34,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:33:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-14 18:33:34,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 18:33:34,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:34,292 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:34,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:33:34,293 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash -460322351, now seen corresponding path program 9 times [2020-10-14 18:33:34,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:34,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959104577] [2020-10-14 18:33:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:34,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:34,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:34,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 18:33:34,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:34,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-14 18:33:34,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:34,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:34,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:33:34,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:34,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 18:33:34,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:34,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:34,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:34,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:34,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:34,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:34,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:33:34,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:34,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:34,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:34,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:34,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:34,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:34,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959104577] [2020-10-14 18:33:34,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:34,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:33:34,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939568671] [2020-10-14 18:33:34,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:33:34,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:34,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:33:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:33:34,724 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2020-10-14 18:33:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:34,834 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-14 18:33:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:33:34,835 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-14 18:33:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:34,835 INFO L225 Difference]: With dead ends: 26 [2020-10-14 18:33:34,836 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 18:33:34,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:33:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 18:33:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-14 18:33:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 18:33:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-14 18:33:34,845 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-14 18:33:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:34,846 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-14 18:33:34,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:33:34,846 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-14 18:33:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 18:33:34,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:34,847 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:34,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:33:34,848 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1348629730, now seen corresponding path program 10 times [2020-10-14 18:33:34,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:34,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467579914] [2020-10-14 18:33:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:34,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:35,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:35,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 18:33:35,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:35,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-14 18:33:35,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:35,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:35,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:33:35,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:35,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:33:35,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:35,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:35,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:35,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:35,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:35,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:35,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:35,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:35,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:35,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467579914] [2020-10-14 18:33:35,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:35,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:33:35,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910519764] [2020-10-14 18:33:35,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:33:35,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:35,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:33:35,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:33:35,394 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2020-10-14 18:33:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:35,502 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-14 18:33:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:33:35,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-14 18:33:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:35,504 INFO L225 Difference]: With dead ends: 27 [2020-10-14 18:33:35,504 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 18:33:35,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:33:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 18:33:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 18:33:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 18:33:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-14 18:33:35,509 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-14 18:33:35,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:35,509 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-14 18:33:35,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:33:35,510 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-14 18:33:35,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 18:33:35,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:35,511 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:35,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:33:35,511 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1178612593, now seen corresponding path program 11 times [2020-10-14 18:33:35,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:35,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291550963] [2020-10-14 18:33:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:35,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:35,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:35,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 18:33:35,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:35,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-14 18:33:35,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:35,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:33:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 18:33:35,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:35,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:35,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:35,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:35,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:35,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:35,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:35,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:35,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:35,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:35,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:35,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:35,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:35,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291550963] [2020-10-14 18:33:35,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:35,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:33:35,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585262903] [2020-10-14 18:33:35,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:33:35,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:35,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:33:35,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:33:35,976 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2020-10-14 18:33:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:36,112 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-14 18:33:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:33:36,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-10-14 18:33:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:36,113 INFO L225 Difference]: With dead ends: 28 [2020-10-14 18:33:36,113 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 18:33:36,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:33:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 18:33:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 18:33:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 18:33:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-14 18:33:36,119 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-14 18:33:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:36,119 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-14 18:33:36,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:33:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-14 18:33:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 18:33:36,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:36,120 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:36,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:33:36,121 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2081254018, now seen corresponding path program 12 times [2020-10-14 18:33:36,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:36,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208164071] [2020-10-14 18:33:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:36,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:36,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:36,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 18:33:36,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:36,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-14 18:33:36,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:36,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:33:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:33:36,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:36,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:36,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:36,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:36,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:36,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:36,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:36,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:36,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:36,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:36,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208164071] [2020-10-14 18:33:36,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:36,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:33:36,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737993965] [2020-10-14 18:33:36,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:33:36,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:36,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:33:36,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:33:36,683 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2020-10-14 18:33:36,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:36,831 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-14 18:33:36,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:33:36,832 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-10-14 18:33:36,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:36,833 INFO L225 Difference]: With dead ends: 29 [2020-10-14 18:33:36,833 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 18:33:36,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:33:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 18:33:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-14 18:33:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 18:33:36,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-14 18:33:36,838 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-14 18:33:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:36,838 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-14 18:33:36,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:33:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-14 18:33:36,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 18:33:36,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:36,839 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:36,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:33:36,840 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:36,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:36,840 INFO L82 PathProgramCache]: Analyzing trace with hash -57903855, now seen corresponding path program 13 times [2020-10-14 18:33:36,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:36,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219200750] [2020-10-14 18:33:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:36,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:37,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:37,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:33:37,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:37,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-14 18:33:37,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:37,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:37,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:33:37,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:37,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 18:33:37,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:37,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:37,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:37,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:37,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:37,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:37,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:37,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:37,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:37,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:37,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:37,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:37,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:37,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219200750] [2020-10-14 18:33:37,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:37,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:33:37,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017921249] [2020-10-14 18:33:37,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:33:37,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:33:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:33:37,585 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2020-10-14 18:33:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:37,780 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-14 18:33:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:33:37,781 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-10-14 18:33:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:37,781 INFO L225 Difference]: With dead ends: 30 [2020-10-14 18:33:37,781 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 18:33:37,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:33:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 18:33:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 18:33:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 18:33:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-14 18:33:37,786 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-14 18:33:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:37,787 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-14 18:33:37,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:33:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-14 18:33:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 18:33:37,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:37,788 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:37,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:33:37,788 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:37,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:37,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1758558242, now seen corresponding path program 14 times [2020-10-14 18:33:37,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:37,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595908485] [2020-10-14 18:33:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:37,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:38,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:38,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 18:33:38,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:38,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-14 18:33:38,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:38,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:38,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:33:38,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:38,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:33:38,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:38,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:38,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:38,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:38,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:38,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:38,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:38,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:38,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:38,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:38,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:38,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:38,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:38,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595908485] [2020-10-14 18:33:38,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:38,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:33:38,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423351429] [2020-10-14 18:33:38,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:33:38,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:33:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:33:38,495 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2020-10-14 18:33:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:38,673 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-14 18:33:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:33:38,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-14 18:33:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:38,674 INFO L225 Difference]: With dead ends: 31 [2020-10-14 18:33:38,674 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 18:33:38,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:33:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 18:33:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 18:33:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 18:33:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-14 18:33:38,679 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-14 18:33:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:38,679 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-14 18:33:38,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:33:38,680 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-14 18:33:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 18:33:38,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:38,681 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:38,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:33:38,681 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:38,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1355730609, now seen corresponding path program 15 times [2020-10-14 18:33:38,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:38,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181279794] [2020-10-14 18:33:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:38,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:39,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:39,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 18:33:39,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:39,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-14 18:33:39,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:39,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:39,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:33:39,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:39,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 18:33:39,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:39,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:39,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:39,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:39,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:39,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:39,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:39,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:39,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:39,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:39,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:39,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181279794] [2020-10-14 18:33:39,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:39,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:33:39,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165510517] [2020-10-14 18:33:39,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:33:39,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:39,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:33:39,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:33:39,402 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2020-10-14 18:33:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:39,600 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-14 18:33:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:33:39,601 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2020-10-14 18:33:39,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:39,602 INFO L225 Difference]: With dead ends: 32 [2020-10-14 18:33:39,602 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 18:33:39,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:33:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 18:33:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 18:33:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 18:33:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-14 18:33:39,608 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-14 18:33:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:39,609 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-14 18:33:39,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:33:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-14 18:33:39,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:33:39,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:39,611 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:39,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:33:39,612 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash -885562818, now seen corresponding path program 16 times [2020-10-14 18:33:39,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:39,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810713091] [2020-10-14 18:33:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:39,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:40,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:40,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 18:33:40,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:40,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-14 18:33:40,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:40,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:40,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:33:40,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:40,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:33:40,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:40,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:40,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:40,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:40,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:40,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:40,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:40,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:40,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:40,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:40,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:40,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:40,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:40,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810713091] [2020-10-14 18:33:40,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:40,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:33:40,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991291569] [2020-10-14 18:33:40,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:33:40,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:40,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:33:40,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:33:40,468 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2020-10-14 18:33:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:40,742 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-14 18:33:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:33:40,745 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-10-14 18:33:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:40,746 INFO L225 Difference]: With dead ends: 33 [2020-10-14 18:33:40,746 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 18:33:40,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:33:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 18:33:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 18:33:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 18:33:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-14 18:33:40,759 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-14 18:33:40,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:40,762 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-14 18:33:40,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:33:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-14 18:33:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:33:40,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:40,766 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:40,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:33:40,767 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:40,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1646182319, now seen corresponding path program 17 times [2020-10-14 18:33:40,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:40,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044032406] [2020-10-14 18:33:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:40,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:41,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:41,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 18:33:41,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:41,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-14 18:33:41,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:41,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:41,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:33:41,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:33:41,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:41,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:41,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:41,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:41,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:41,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:41,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:41,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:41,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:41,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:41,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:41,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:41,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 17 [2020-10-14 18:33:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:41,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044032406] [2020-10-14 18:33:41,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:41,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:33:41,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672070964] [2020-10-14 18:33:41,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:33:41,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:41,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:33:41,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:33:41,768 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2020-10-14 18:33:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:42,008 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-14 18:33:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:33:42,009 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-10-14 18:33:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:42,009 INFO L225 Difference]: With dead ends: 34 [2020-10-14 18:33:42,009 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 18:33:42,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:33:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 18:33:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-14 18:33:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 18:33:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-14 18:33:42,019 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-14 18:33:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:42,020 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-14 18:33:42,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:33:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-14 18:33:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:33:42,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:42,024 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:42,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:33:42,024 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash 544416926, now seen corresponding path program 18 times [2020-10-14 18:33:42,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:42,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742925581] [2020-10-14 18:33:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:42,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:42,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:42,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:33:42,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:42,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-14 18:33:42,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:42,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:42,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:33:42,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:42,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:33:42,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:42,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:42,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:43,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:43,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:43,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:43,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:43,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:43,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:43,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:43,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:43,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:43,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:43,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742925581] [2020-10-14 18:33:43,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:43,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:33:43,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553010027] [2020-10-14 18:33:43,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:33:43,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:43,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:33:43,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:33:43,007 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2020-10-14 18:33:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:43,265 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-14 18:33:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:33:43,266 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2020-10-14 18:33:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:43,266 INFO L225 Difference]: With dead ends: 35 [2020-10-14 18:33:43,267 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 18:33:43,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:33:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 18:33:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-14 18:33:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 18:33:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-14 18:33:43,276 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-14 18:33:43,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:43,276 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-14 18:33:43,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:33:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-14 18:33:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:33:43,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:43,280 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:43,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:33:43,281 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:43,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:43,281 INFO L82 PathProgramCache]: Analyzing trace with hash -266483215, now seen corresponding path program 19 times [2020-10-14 18:33:43,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:43,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577952112] [2020-10-14 18:33:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:43,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:44,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:44,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:33:44,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:44,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 747 [2020-10-14 18:33:44,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:44,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:44,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:33:44,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:44,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:33:44,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:44,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:44,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:44,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:44,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:44,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:44,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:44,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:44,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:44,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:44,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:44,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:44,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:44,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577952112] [2020-10-14 18:33:44,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:44,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:33:44,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429623414] [2020-10-14 18:33:44,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:33:44,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:44,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:33:44,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:33:44,489 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2020-10-14 18:33:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:44,777 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-14 18:33:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:33:44,777 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2020-10-14 18:33:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:44,778 INFO L225 Difference]: With dead ends: 36 [2020-10-14 18:33:44,778 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 18:33:44,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:33:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 18:33:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 18:33:44,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 18:33:44,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-14 18:33:44,783 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-14 18:33:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:44,784 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-14 18:33:44,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:33:44,784 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-14 18:33:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 18:33:44,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:44,785 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:44,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:33:44,785 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:44,785 INFO L82 PathProgramCache]: Analyzing trace with hash 365416190, now seen corresponding path program 20 times [2020-10-14 18:33:44,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:44,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912750279] [2020-10-14 18:33:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:44,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:45,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:45,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:33:45,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:45,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 772 [2020-10-14 18:33:45,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:45,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:45,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:33:45,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:45,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:33:45,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:45,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:45,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:45,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:45,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:45,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:45,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:45,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:45,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:45,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:45,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:45,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:45,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:45,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912750279] [2020-10-14 18:33:45,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:45,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:33:45,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144536044] [2020-10-14 18:33:45,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:33:45,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:45,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:33:45,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:33:45,972 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2020-10-14 18:33:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:46,269 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-14 18:33:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:33:46,269 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2020-10-14 18:33:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:46,270 INFO L225 Difference]: With dead ends: 37 [2020-10-14 18:33:46,270 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 18:33:46,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:33:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 18:33:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-14 18:33:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 18:33:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-14 18:33:46,276 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-14 18:33:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:46,276 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-14 18:33:46,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:33:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-14 18:33:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 18:33:46,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:46,277 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:46,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:33:46,278 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:46,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:46,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1520538735, now seen corresponding path program 21 times [2020-10-14 18:33:46,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:46,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034523103] [2020-10-14 18:33:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:46,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:47,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:47,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:33:47,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:47,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-10-14 18:33:47,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:47,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:47,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:33:47,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:47,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:33:47,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:47,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:47,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:47,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:47,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:47,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:47,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:47,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:47,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:47,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034523103] [2020-10-14 18:33:47,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:47,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:33:47,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155663274] [2020-10-14 18:33:47,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:33:47,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:47,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:33:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:33:47,650 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2020-10-14 18:33:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:47,991 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-14 18:33:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:33:47,993 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2020-10-14 18:33:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:47,994 INFO L225 Difference]: With dead ends: 38 [2020-10-14 18:33:47,994 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 18:33:47,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:33:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 18:33:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 18:33:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 18:33:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-14 18:33:48,003 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-14 18:33:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:48,003 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-14 18:33:48,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:33:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-14 18:33:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 18:33:48,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:48,006 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:48,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:33:48,006 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash 144400734, now seen corresponding path program 22 times [2020-10-14 18:33:48,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:48,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900486999] [2020-10-14 18:33:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:48,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:48,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 18:33:48,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:48,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-14 18:33:48,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:48,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:48,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:33:48,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:48,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:33:48,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:49,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:49,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:49,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:49,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:49,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:49,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:49,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:49,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:49,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:49,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:49,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:49,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900486999] [2020-10-14 18:33:49,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:49,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:33:49,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680199364] [2020-10-14 18:33:49,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:33:49,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:49,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:33:49,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:33:49,382 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2020-10-14 18:33:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:49,743 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-14 18:33:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:33:49,745 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2020-10-14 18:33:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:49,745 INFO L225 Difference]: With dead ends: 39 [2020-10-14 18:33:49,746 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 18:33:49,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:33:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 18:33:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-14 18:33:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 18:33:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-14 18:33:49,755 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-14 18:33:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:49,756 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-14 18:33:49,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:33:49,756 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-14 18:33:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:33:49,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:49,756 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:49,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:33:49,757 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:49,759 INFO L82 PathProgramCache]: Analyzing trace with hash 217916721, now seen corresponding path program 23 times [2020-10-14 18:33:49,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:49,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646835627] [2020-10-14 18:33:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:49,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:50,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:50,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:33:50,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:50,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-14 18:33:50,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:50,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:33:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:50,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:33:50,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:51,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:51,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:51,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:51,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:51,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:51,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:51,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:51,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:51,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:51,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:51,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646835627] [2020-10-14 18:33:51,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:51,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:33:51,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062427817] [2020-10-14 18:33:51,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:33:51,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:51,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:33:51,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:33:51,024 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2020-10-14 18:33:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:51,459 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-14 18:33:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:33:51,460 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2020-10-14 18:33:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:51,460 INFO L225 Difference]: With dead ends: 40 [2020-10-14 18:33:51,461 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 18:33:51,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:33:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 18:33:51,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-14 18:33:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 18:33:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-14 18:33:51,466 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-14 18:33:51,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:51,466 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-14 18:33:51,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:33:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-14 18:33:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 18:33:51,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:51,467 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:51,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:33:51,467 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:51,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:51,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1798054978, now seen corresponding path program 24 times [2020-10-14 18:33:51,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:51,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463910594] [2020-10-14 18:33:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:51,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:52,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:52,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 18:33:52,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:52,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-10-14 18:33:52,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:52,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:33:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:52,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:33:52,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:33:52,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:52,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:52,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:52,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:52,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:52,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:33:52,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:52,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:52,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:52,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:52,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:52,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463910594] [2020-10-14 18:33:52,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:52,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:33:52,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194386698] [2020-10-14 18:33:52,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:33:52,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:52,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:33:52,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:33:52,917 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2020-10-14 18:33:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:53,365 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-14 18:33:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:33:53,366 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2020-10-14 18:33:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:53,367 INFO L225 Difference]: With dead ends: 41 [2020-10-14 18:33:53,367 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 18:33:53,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:33:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 18:33:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-14 18:33:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 18:33:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-14 18:33:53,371 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-14 18:33:53,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:53,371 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-14 18:33:53,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:33:53,371 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-14 18:33:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 18:33:53,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:53,372 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:53,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:33:53,372 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:53,372 INFO L82 PathProgramCache]: Analyzing trace with hash 131331793, now seen corresponding path program 25 times [2020-10-14 18:33:53,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:53,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004074479] [2020-10-14 18:33:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:53,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:54,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:54,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:33:54,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:54,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-14 18:33:54,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:54,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:54,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:33:54,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:54,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:33:54,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:54,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:54,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:54,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:54,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:54,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:54,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:54,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:54,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:54,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:54,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004074479] [2020-10-14 18:33:54,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:54,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:33:54,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110697103] [2020-10-14 18:33:54,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:33:54,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:54,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:33:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:33:54,919 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2020-10-14 18:33:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:55,404 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-14 18:33:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:33:55,404 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2020-10-14 18:33:55,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:55,405 INFO L225 Difference]: With dead ends: 42 [2020-10-14 18:33:55,405 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 18:33:55,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:33:55,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 18:33:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 18:33:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:33:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-14 18:33:55,410 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-14 18:33:55,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:55,410 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-14 18:33:55,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:33:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-14 18:33:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:33:55,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:55,411 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:55,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:33:55,412 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:55,412 INFO L82 PathProgramCache]: Analyzing trace with hash -187220450, now seen corresponding path program 26 times [2020-10-14 18:33:55,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:55,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535186187] [2020-10-14 18:33:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:55,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:56,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:56,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:33:56,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:56,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-14 18:33:56,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:56,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:56,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:33:56,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:56,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:33:56,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:56,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:56,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:56,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:56,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:56,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:56,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:33:56,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:56,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:56,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:56,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:56,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:56,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:56,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535186187] [2020-10-14 18:33:56,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:56,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:33:56,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96793211] [2020-10-14 18:33:56,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:33:56,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:56,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:33:56,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:33:56,776 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2020-10-14 18:33:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:57,277 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-14 18:33:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:33:57,278 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2020-10-14 18:33:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:57,279 INFO L225 Difference]: With dead ends: 43 [2020-10-14 18:33:57,279 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 18:33:57,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:33:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 18:33:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-14 18:33:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 18:33:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-14 18:33:57,293 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-14 18:33:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:57,294 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-14 18:33:57,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:33:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-14 18:33:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 18:33:57,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:57,295 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:57,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:33:57,295 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:57,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:57,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1472405391, now seen corresponding path program 27 times [2020-10-14 18:33:57,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:57,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847567049] [2020-10-14 18:33:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:57,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:58,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:58,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 18:33:58,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:58,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-14 18:33:58,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:58,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:58,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:33:58,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:33:58,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:33:58,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:33:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:59,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:33:59,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:33:59,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:33:59,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:33:59,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:33:59,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:33:59,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:33:59,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:33:59,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:33:59,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:33:59,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:33:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:33:59,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847567049] [2020-10-14 18:33:59,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:33:59,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:33:59,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510876601] [2020-10-14 18:33:59,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:33:59,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:33:59,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:33:59,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:33:59,121 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2020-10-14 18:33:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:33:59,672 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-14 18:33:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:33:59,673 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2020-10-14 18:33:59,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:33:59,674 INFO L225 Difference]: With dead ends: 44 [2020-10-14 18:33:59,674 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 18:33:59,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:33:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 18:33:59,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-14 18:33:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 18:33:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-14 18:33:59,684 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-14 18:33:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:33:59,684 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-14 18:33:59,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:33:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-14 18:33:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:33:59,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:59,685 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:59,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:33:59,685 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1636534398, now seen corresponding path program 28 times [2020-10-14 18:33:59,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:59,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139336021] [2020-10-14 18:33:59,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:33:59,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:00,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:00,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:34:00,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:00,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 909 [2020-10-14 18:34:00,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:00,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:00,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:34:00,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:00,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:34:00,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:01,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:01,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:01,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:01,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:01,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:01,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:01,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:01,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:01,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:01,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:01,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:01,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:01,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139336021] [2020-10-14 18:34:01,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:01,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:34:01,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859337979] [2020-10-14 18:34:01,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:34:01,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:01,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:34:01,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:34:01,294 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2020-10-14 18:34:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:01,858 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-14 18:34:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:34:01,858 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2020-10-14 18:34:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:01,859 INFO L225 Difference]: With dead ends: 45 [2020-10-14 18:34:01,859 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:34:01,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:34:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:34:01,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-14 18:34:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 18:34:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-14 18:34:01,868 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-14 18:34:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:01,868 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-14 18:34:01,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 18:34:01,868 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-14 18:34:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 18:34:01,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:01,869 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:01,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:34:01,869 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:01,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:01,871 INFO L82 PathProgramCache]: Analyzing trace with hash -770579951, now seen corresponding path program 29 times [2020-10-14 18:34:01,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:01,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830735764] [2020-10-14 18:34:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:01,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:02,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:02,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 18:34:02,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:02,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-14 18:34:02,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:02,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:02,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:34:02,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:02,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:34:02,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:03,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:03,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:03,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:03,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:03,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:03,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:03,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:03,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:03,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:03,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:03,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:03,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:03,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830735764] [2020-10-14 18:34:03,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:03,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:34:03,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761133018] [2020-10-14 18:34:03,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:34:03,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:03,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:34:03,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:34:03,643 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2020-10-14 18:34:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:04,238 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-14 18:34:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:34:04,239 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2020-10-14 18:34:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:04,240 INFO L225 Difference]: With dead ends: 46 [2020-10-14 18:34:04,240 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 18:34:04,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:34:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 18:34:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 18:34:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 18:34:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-14 18:34:04,246 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-14 18:34:04,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:04,247 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-14 18:34:04,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:34:04,247 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-14 18:34:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 18:34:04,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:04,248 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:04,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:34:04,248 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:04,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1918286558, now seen corresponding path program 30 times [2020-10-14 18:34:04,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:04,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111638332] [2020-10-14 18:34:04,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:04,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:05,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:05,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 18:34:05,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:05,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-10-14 18:34:05,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:05,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:34:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:34:05,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:06,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:06,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:06,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:06,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:06,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:06,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:06,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:06,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:06,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:06,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:06,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:06,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:06,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111638332] [2020-10-14 18:34:06,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:06,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:34:06,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61237647] [2020-10-14 18:34:06,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:34:06,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:06,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:34:06,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:34:06,030 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2020-10-14 18:34:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:06,693 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-14 18:34:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 18:34:06,696 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2020-10-14 18:34:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:06,697 INFO L225 Difference]: With dead ends: 47 [2020-10-14 18:34:06,697 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:34:06,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:34:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:34:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-14 18:34:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 18:34:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-14 18:34:06,707 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-14 18:34:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:06,707 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-14 18:34:06,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:34:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-14 18:34:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:34:06,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:06,707 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:06,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:34:06,708 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash -626197583, now seen corresponding path program 31 times [2020-10-14 18:34:06,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:06,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499545496] [2020-10-14 18:34:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:06,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:07,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:07,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:34:07,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:07,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-10-14 18:34:07,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:07,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:07,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:34:07,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:07,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:34:07,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:08,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:08,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:08,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:08,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:08,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:08,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:08,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:08,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:08,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:08,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:08,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:08,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:08,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499545496] [2020-10-14 18:34:08,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:08,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 18:34:08,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429473508] [2020-10-14 18:34:08,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 18:34:08,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:08,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 18:34:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:34:08,664 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2020-10-14 18:34:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:09,345 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-14 18:34:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:34:09,346 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2020-10-14 18:34:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:09,346 INFO L225 Difference]: With dead ends: 48 [2020-10-14 18:34:09,347 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 18:34:09,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:34:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 18:34:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 18:34:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 18:34:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-14 18:34:09,353 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-14 18:34:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:09,354 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-14 18:34:09,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 18:34:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-14 18:34:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 18:34:09,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:09,354 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:09,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:34:09,355 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:09,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:09,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2099172670, now seen corresponding path program 32 times [2020-10-14 18:34:09,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:09,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881351646] [2020-10-14 18:34:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:09,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:10,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:10,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 18:34:10,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:10,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1287 [2020-10-14 18:34:10,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:10,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:34:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:34:10,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:11,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:11,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:11,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:11,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:11,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:11,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:11,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:11,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:11,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:11,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:11,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:11,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:11,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881351646] [2020-10-14 18:34:11,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:11,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 18:34:11,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042940132] [2020-10-14 18:34:11,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 18:34:11,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:11,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 18:34:11,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:34:11,530 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2020-10-14 18:34:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:12,229 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-14 18:34:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:34:12,229 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2020-10-14 18:34:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:12,230 INFO L225 Difference]: With dead ends: 49 [2020-10-14 18:34:12,230 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 18:34:12,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:34:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 18:34:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-14 18:34:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 18:34:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-14 18:34:12,236 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-14 18:34:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:12,237 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-14 18:34:12,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 18:34:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-14 18:34:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 18:34:12,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:12,237 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:12,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:34:12,238 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash 686304593, now seen corresponding path program 33 times [2020-10-14 18:34:12,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:12,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405059882] [2020-10-14 18:34:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:12,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:13,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:13,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:34:13,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:13,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-10-14 18:34:13,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:13,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:13,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:34:13,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:13,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:34:13,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:14,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:14,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:14,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:14,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:14,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:14,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:34:14,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:14,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:14,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:14,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405059882] [2020-10-14 18:34:14,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:14,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:34:14,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969915912] [2020-10-14 18:34:14,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:34:14,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:14,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:34:14,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:34:14,299 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2020-10-14 18:34:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:15,057 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-14 18:34:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:34:15,058 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2020-10-14 18:34:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:15,059 INFO L225 Difference]: With dead ends: 50 [2020-10-14 18:34:15,059 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 18:34:15,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:34:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 18:34:15,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-14 18:34:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 18:34:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-14 18:34:15,064 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-14 18:34:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:15,064 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-14 18:34:15,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:34:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-14 18:34:15,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:34:15,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:15,065 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:15,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:34:15,065 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:15,065 INFO L82 PathProgramCache]: Analyzing trace with hash -162932834, now seen corresponding path program 34 times [2020-10-14 18:34:15,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:15,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82851245] [2020-10-14 18:34:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:15,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:16,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:16,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:34:16,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:16,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-14 18:34:16,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:16,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:34:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:16,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:34:16,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:17,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:17,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:17,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:17,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:17,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:17,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:17,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:17,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:17,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:17,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:17,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:17,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82851245] [2020-10-14 18:34:17,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:17,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 18:34:17,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188106120] [2020-10-14 18:34:17,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 18:34:17,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 18:34:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:34:17,254 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2020-10-14 18:34:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:18,068 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-14 18:34:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 18:34:18,069 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-10-14 18:34:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:18,070 INFO L225 Difference]: With dead ends: 51 [2020-10-14 18:34:18,070 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 18:34:18,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:34:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 18:34:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 18:34:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 18:34:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-14 18:34:18,076 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-14 18:34:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:18,076 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-14 18:34:18,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 18:34:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-14 18:34:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 18:34:18,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:18,077 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:18,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:34:18,078 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash -719489295, now seen corresponding path program 35 times [2020-10-14 18:34:18,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:18,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055687814] [2020-10-14 18:34:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:18,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:19,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:19,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:34:19,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:19,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1499 [2020-10-14 18:34:19,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:19,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:19,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:34:19,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:19,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:34:19,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:20,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:20,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:20,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:20,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:20,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:20,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:20,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:20,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:20,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:20,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:20,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:20,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:20,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055687814] [2020-10-14 18:34:20,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:20,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 18:34:20,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745202122] [2020-10-14 18:34:20,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 18:34:20,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:20,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 18:34:20,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:34:20,593 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2020-10-14 18:34:21,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:21,433 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-14 18:34:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:34:21,434 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2020-10-14 18:34:21,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:21,435 INFO L225 Difference]: With dead ends: 52 [2020-10-14 18:34:21,435 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 18:34:21,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:34:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 18:34:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-14 18:34:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 18:34:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-14 18:34:21,442 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-14 18:34:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:21,442 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-14 18:34:21,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 18:34:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-14 18:34:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 18:34:21,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:21,443 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:21,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:34:21,443 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:21,444 INFO L82 PathProgramCache]: Analyzing trace with hash -792870402, now seen corresponding path program 36 times [2020-10-14 18:34:21,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:21,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919087043] [2020-10-14 18:34:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:21,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:23,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:23,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:34:23,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:23,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1561 [2020-10-14 18:34:23,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:23,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:23,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:34:23,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:23,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:34:23,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:24,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:24,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:24,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:24,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:24,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:24,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:24,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:24,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:24,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:24,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:24,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:24,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:24,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919087043] [2020-10-14 18:34:24,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:24,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:34:24,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305108885] [2020-10-14 18:34:24,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:34:24,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:24,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:34:24,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:34:24,023 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2020-10-14 18:34:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:24,954 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-14 18:34:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:34:24,955 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2020-10-14 18:34:24,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:24,956 INFO L225 Difference]: With dead ends: 53 [2020-10-14 18:34:24,956 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 18:34:24,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:34:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 18:34:24,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-14 18:34:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 18:34:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-14 18:34:24,962 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-14 18:34:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:24,962 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-14 18:34:24,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:34:24,962 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-14 18:34:24,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 18:34:24,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:24,963 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:24,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:34:24,963 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:24,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1227282577, now seen corresponding path program 37 times [2020-10-14 18:34:24,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:24,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107558] [2020-10-14 18:34:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:24,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:26,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:26,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:34:26,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:26,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1778 [2020-10-14 18:34:26,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:26,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:26,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:34:26,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:26,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:34:26,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:27,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:27,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:27,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:27,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:27,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:27,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:34:27,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:27,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:27,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:27,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:27,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:27,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:34:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:27,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107558] [2020-10-14 18:34:27,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:27,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:34:27,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827493547] [2020-10-14 18:34:27,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:34:27,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:27,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:34:27,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:34:27,851 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2020-10-14 18:34:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:28,840 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-14 18:34:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 18:34:28,841 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2020-10-14 18:34:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:28,842 INFO L225 Difference]: With dead ends: 54 [2020-10-14 18:34:28,842 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 18:34:28,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:34:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 18:34:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 18:34:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 18:34:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-14 18:34:28,847 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-14 18:34:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:28,847 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-14 18:34:28,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:34:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-14 18:34:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:34:28,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:28,848 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:28,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:34:28,848 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:28,849 INFO L82 PathProgramCache]: Analyzing trace with hash -572484514, now seen corresponding path program 38 times [2020-10-14 18:34:28,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:28,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340895595] [2020-10-14 18:34:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:28,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:30,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:30,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 18:34:30,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:30,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2019 [2020-10-14 18:34:30,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:30,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:30,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:34:30,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:30,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:34:30,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:32,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:32,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:32,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:32,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:32,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:32,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:32,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:32,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:32,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:32,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:32,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:32,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:32,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340895595] [2020-10-14 18:34:32,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:32,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:34:32,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501595267] [2020-10-14 18:34:32,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:34:32,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:32,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:34:32,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:34:32,037 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2020-10-14 18:34:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:33,066 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-14 18:34:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:34:33,067 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2020-10-14 18:34:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:33,068 INFO L225 Difference]: With dead ends: 55 [2020-10-14 18:34:33,068 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 18:34:33,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:34:33,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 18:34:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-14 18:34:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 18:34:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-14 18:34:33,074 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-14 18:34:33,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:33,075 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-14 18:34:33,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:34:33,075 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-14 18:34:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 18:34:33,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:33,076 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:33,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:34:33,076 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:33,076 INFO L82 PathProgramCache]: Analyzing trace with hash -530689487, now seen corresponding path program 39 times [2020-10-14 18:34:33,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:33,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715202131] [2020-10-14 18:34:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:33,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:34,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:34,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 18:34:34,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:34,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1898 [2020-10-14 18:34:34,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:34,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:34:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 18:34:34,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:36,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:36,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:36,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:36,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:36,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:36,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:36,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:36,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:36,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:36,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715202131] [2020-10-14 18:34:36,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:36,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 18:34:36,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124302500] [2020-10-14 18:34:36,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 18:34:36,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:36,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 18:34:36,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:34:36,178 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2020-10-14 18:34:37,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:37,270 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-14 18:34:37,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 18:34:37,270 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2020-10-14 18:34:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:37,271 INFO L225 Difference]: With dead ends: 56 [2020-10-14 18:34:37,271 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 18:34:37,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:34:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 18:34:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-14 18:34:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 18:34:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-14 18:34:37,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-14 18:34:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:37,277 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-14 18:34:37,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 18:34:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-14 18:34:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 18:34:37,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:37,278 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:37,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:34:37,278 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:37,279 INFO L82 PathProgramCache]: Analyzing trace with hash 764956350, now seen corresponding path program 40 times [2020-10-14 18:34:37,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:37,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94588273] [2020-10-14 18:34:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:37,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:39,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:39,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:34:39,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:39,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2140 [2020-10-14 18:34:39,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:39,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:39,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:34:39,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:39,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:34:39,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:40,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:40,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:40,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:40,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:40,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:40,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:34:40,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:40,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:40,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:40,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:40,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:40,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:40,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94588273] [2020-10-14 18:34:40,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:40,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 18:34:40,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146222176] [2020-10-14 18:34:40,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 18:34:40,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:40,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 18:34:40,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:34:40,677 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2020-10-14 18:34:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:41,823 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-14 18:34:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 18:34:41,824 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2020-10-14 18:34:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:41,824 INFO L225 Difference]: With dead ends: 57 [2020-10-14 18:34:41,825 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 18:34:41,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:34:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 18:34:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-14 18:34:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 18:34:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-14 18:34:41,831 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-14 18:34:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:41,831 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-14 18:34:41,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 18:34:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-14 18:34:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 18:34:41,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:41,832 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:41,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:34:41,832 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2019695663, now seen corresponding path program 41 times [2020-10-14 18:34:41,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:41,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944568674] [2020-10-14 18:34:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:41,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:44,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:44,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 18:34:44,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:44,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-10-14 18:34:44,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:44,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:44,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:34:44,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:44,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 18:34:44,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:45,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:45,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:45,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:45,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:45,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:45,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:34:45,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:45,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:45,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:45,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:45,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:45,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944568674] [2020-10-14 18:34:45,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:45,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 18:34:45,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171698598] [2020-10-14 18:34:45,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 18:34:45,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:45,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 18:34:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:34:45,606 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2020-10-14 18:34:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:46,814 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-14 18:34:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 18:34:46,814 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2020-10-14 18:34:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:46,815 INFO L225 Difference]: With dead ends: 58 [2020-10-14 18:34:46,815 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 18:34:46,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:34:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 18:34:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 18:34:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:34:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-14 18:34:46,820 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-14 18:34:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:46,820 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-14 18:34:46,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 18:34:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-14 18:34:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 18:34:46,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:46,821 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:46,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 18:34:46,821 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1850405150, now seen corresponding path program 42 times [2020-10-14 18:34:46,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:46,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418163178] [2020-10-14 18:34:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:46,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:49,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:49,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 18:34:49,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:49,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2766 [2020-10-14 18:34:49,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:49,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:49,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 18:34:49,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:49,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:34:49,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:50,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:50,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:50,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:50,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:50,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:50,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:50,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:50,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:50,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:50,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418163178] [2020-10-14 18:34:50,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:50,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 18:34:50,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060395957] [2020-10-14 18:34:50,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 18:34:50,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:50,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 18:34:50,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:34:50,942 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2020-10-14 18:34:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:52,237 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-14 18:34:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 18:34:52,245 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2020-10-14 18:34:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:52,246 INFO L225 Difference]: With dead ends: 59 [2020-10-14 18:34:52,246 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 18:34:52,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:34:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 18:34:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-14 18:34:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 18:34:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-14 18:34:52,255 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-14 18:34:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:52,255 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-14 18:34:52,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 18:34:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-14 18:34:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 18:34:52,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:52,259 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:52,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 18:34:52,259 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:52,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1564446065, now seen corresponding path program 43 times [2020-10-14 18:34:52,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:52,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402014696] [2020-10-14 18:34:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:52,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:54,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:54,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:34:54,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:54,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2608 [2020-10-14 18:34:54,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:54,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 18:34:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:34:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 18:34:54,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:56,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:34:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:56,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:34:56,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:34:56,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:34:56,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:34:56,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:34:56,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:34:56,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:34:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:34:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:34:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:34:56,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:34:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:34:56,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402014696] [2020-10-14 18:34:56,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:34:56,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 18:34:56,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264869654] [2020-10-14 18:34:56,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 18:34:56,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:34:56,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 18:34:56,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:34:56,304 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2020-10-14 18:34:57,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:34:57,661 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-14 18:34:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 18:34:57,662 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2020-10-14 18:34:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:34:57,663 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:34:57,663 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 18:34:57,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:34:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 18:34:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-14 18:34:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 18:34:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-14 18:34:57,668 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-14 18:34:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:34:57,668 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-14 18:34:57,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 18:34:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-14 18:34:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:34:57,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:34:57,669 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:34:57,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 18:34:57,670 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:34:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:34:57,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1289649022, now seen corresponding path program 44 times [2020-10-14 18:34:57,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:34:57,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877790595] [2020-10-14 18:34:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:34:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:34:57,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:00,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:00,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 18:35:00,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:00,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2853 [2020-10-14 18:35:00,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:00,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:00,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 18:35:00,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:35:00,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:35:00,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:02,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:35:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:02,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:02,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:02,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:35:02,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:02,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:35:02,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:02,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:02,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:35:02,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:35:02,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:35:02,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:35:02,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877790595] [2020-10-14 18:35:02,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:35:02,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 18:35:02,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546829284] [2020-10-14 18:35:02,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 18:35:02,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:35:02,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 18:35:02,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:35:02,035 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2020-10-14 18:35:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:35:03,429 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-14 18:35:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 18:35:03,429 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2020-10-14 18:35:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:35:03,430 INFO L225 Difference]: With dead ends: 61 [2020-10-14 18:35:03,430 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 18:35:03,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:35:03,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 18:35:03,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-14 18:35:03,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 18:35:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-14 18:35:03,435 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-14 18:35:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:35:03,435 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-14 18:35:03,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 18:35:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-14 18:35:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 18:35:03,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:35:03,436 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:35:03,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 18:35:03,436 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:35:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:35:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1360875281, now seen corresponding path program 45 times [2020-10-14 18:35:03,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:35:03,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254471481] [2020-10-14 18:35:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:35:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:03,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:06,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:06,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 18:35:06,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:06,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3322 [2020-10-14 18:35:06,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:06,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:06,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 18:35:06,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:35:06,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 18:35:06,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:08,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:35:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:08,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:08,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:08,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:35:08,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:08,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:35:08,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:08,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:08,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:35:08,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:35:08,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:35:08,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:35:08,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254471481] [2020-10-14 18:35:08,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:35:08,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 18:35:08,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215843697] [2020-10-14 18:35:08,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 18:35:08,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:35:08,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 18:35:08,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:35:08,313 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2020-10-14 18:35:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:35:09,718 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-14 18:35:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 18:35:09,719 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2020-10-14 18:35:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:35:09,720 INFO L225 Difference]: With dead ends: 62 [2020-10-14 18:35:09,720 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 18:35:09,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:35:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 18:35:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-14 18:35:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 18:35:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-14 18:35:09,724 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-14 18:35:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:35:09,724 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-14 18:35:09,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 18:35:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-14 18:35:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:35:09,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:35:09,725 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:35:09,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 18:35:09,725 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:35:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:35:09,726 INFO L82 PathProgramCache]: Analyzing trace with hash -726077986, now seen corresponding path program 46 times [2020-10-14 18:35:09,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:35:09,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204260660] [2020-10-14 18:35:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:35:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:12,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:12,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:35:12,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:12,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2926 [2020-10-14 18:35:12,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:12,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:12,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 18:35:12,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:35:12,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:35:12,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:14,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:35:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:14,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:14,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:14,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:35:14,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:14,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:35:14,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:14,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:35:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:35:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:35:14,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:35:14,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204260660] [2020-10-14 18:35:14,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:35:14,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 18:35:14,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210577419] [2020-10-14 18:35:14,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 18:35:14,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:35:14,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 18:35:14,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:35:14,307 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2020-10-14 18:35:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:35:15,844 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-14 18:35:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 18:35:15,845 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2020-10-14 18:35:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:35:15,846 INFO L225 Difference]: With dead ends: 63 [2020-10-14 18:35:15,846 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 18:35:15,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:35:15,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 18:35:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-14 18:35:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 18:35:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-14 18:35:15,851 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-14 18:35:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:35:15,851 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-14 18:35:15,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 18:35:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-14 18:35:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 18:35:15,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:35:15,852 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:35:15,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 18:35:15,853 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:35:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:35:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash -997119823, now seen corresponding path program 47 times [2020-10-14 18:35:15,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:35:15,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003439209] [2020-10-14 18:35:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:35:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:15,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:19,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:19,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 18:35:19,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:19,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3742 [2020-10-14 18:35:19,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:19,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:19,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 18:35:19,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:35:19,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 18:35:19,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:21,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:35:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:21,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:21,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:21,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:35:21,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:21,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:35:21,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:21,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:21,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:35:21,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:35:21,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:35:21,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:35:21,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003439209] [2020-10-14 18:35:21,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:35:21,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 18:35:21,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158399343] [2020-10-14 18:35:21,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 18:35:21,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:35:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 18:35:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:35:21,335 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2020-10-14 18:35:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:35:22,937 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-14 18:35:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 18:35:22,938 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2020-10-14 18:35:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:35:22,939 INFO L225 Difference]: With dead ends: 64 [2020-10-14 18:35:22,939 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 18:35:22,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:35:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 18:35:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-14 18:35:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:35:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-14 18:35:22,945 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-14 18:35:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:35:22,945 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-14 18:35:22,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 18:35:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-14 18:35:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 18:35:22,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:35:22,946 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:35:22,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 18:35:22,946 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:35:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:35:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash -809482178, now seen corresponding path program 48 times [2020-10-14 18:35:22,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:35:22,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744757857] [2020-10-14 18:35:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:35:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:22,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:26,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:26,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 18:35:26,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:26,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3625 [2020-10-14 18:35:26,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:26,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:26,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 18:35:26,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:35:26,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:35:26,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:28,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:35:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:28,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:28,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:28,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:35:28,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:28,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:35:28,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:28,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:28,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:35:28,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:35:28,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:35:28,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:35:28,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744757857] [2020-10-14 18:35:28,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:35:28,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 18:35:28,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773900531] [2020-10-14 18:35:28,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 18:35:28,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:35:28,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 18:35:28,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 18:35:28,370 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2020-10-14 18:35:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:35:30,039 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-14 18:35:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 18:35:30,040 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2020-10-14 18:35:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:35:30,040 INFO L225 Difference]: With dead ends: 65 [2020-10-14 18:35:30,040 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 18:35:30,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 18:35:30,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 18:35:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-14 18:35:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 18:35:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-14 18:35:30,046 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-14 18:35:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:35:30,046 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-14 18:35:30,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 18:35:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-14 18:35:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 18:35:30,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:35:30,051 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:35:30,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 18:35:30,051 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:35:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:35:30,051 INFO L82 PathProgramCache]: Analyzing trace with hash 712317521, now seen corresponding path program 49 times [2020-10-14 18:35:30,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:35:30,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199330050] [2020-10-14 18:35:30,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:35:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:30,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:34,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:34,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:35:34,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:34,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4368 [2020-10-14 18:35:34,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:34,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:34,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 18:35:34,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:35:34,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 18:35:34,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:36,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:35:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:36,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:36,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:36,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:35:36,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:36,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:35:36,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:36,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:35:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:35:36,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:35:36,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:35:36,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199330050] [2020-10-14 18:35:36,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:35:36,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 18:35:36,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976746283] [2020-10-14 18:35:36,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 18:35:36,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:35:36,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 18:35:36,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 18:35:36,311 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2020-10-14 18:35:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:35:38,091 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-14 18:35:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 18:35:38,092 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2020-10-14 18:35:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:35:38,093 INFO L225 Difference]: With dead ends: 66 [2020-10-14 18:35:38,093 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 18:35:38,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 18:35:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 18:35:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-14 18:35:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 18:35:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-14 18:35:38,097 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-14 18:35:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:35:38,097 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-14 18:35:38,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 18:35:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-14 18:35:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:35:38,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:35:38,098 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:35:38,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 18:35:38,098 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:35:38,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:35:38,099 INFO L82 PathProgramCache]: Analyzing trace with hash 643467934, now seen corresponding path program 50 times [2020-10-14 18:35:38,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:35:38,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976788068] [2020-10-14 18:35:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:35:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:38,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:41,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:41,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 18:35:41,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:41,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3851 [2020-10-14 18:35:41,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:41,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:41,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 18:35:41,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:35:41,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:35:41,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:43,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:35:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:43,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:43,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:43,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:35:43,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:43,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:35:43,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:43,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:43,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:35:43,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:35:43,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:35:43,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:35:43,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976788068] [2020-10-14 18:35:43,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:35:43,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 18:35:43,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143838830] [2020-10-14 18:35:43,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 18:35:43,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:35:43,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 18:35:43,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 18:35:43,912 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2020-10-14 18:35:45,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:35:45,726 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-14 18:35:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 18:35:45,728 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2020-10-14 18:35:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:35:45,729 INFO L225 Difference]: With dead ends: 67 [2020-10-14 18:35:45,729 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 18:35:45,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 18:35:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 18:35:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-14 18:35:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:35:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-14 18:35:45,734 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-14 18:35:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:35:45,734 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-14 18:35:45,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 18:35:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-14 18:35:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 18:35:45,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:35:45,735 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:35:45,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 18:35:45,735 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:35:45,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:35:45,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1490869263, now seen corresponding path program 51 times [2020-10-14 18:35:45,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:35:45,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329880056] [2020-10-14 18:35:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:35:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:45,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:50,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:50,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 18:35:50,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:50,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4302 [2020-10-14 18:35:50,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:50,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:50,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 18:35:50,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:35:50,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 18:35:50,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:52,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:35:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:52,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:52,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:52,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:35:52,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:52,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:35:52,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:52,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:52,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:35:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:35:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:35:52,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:35:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:35:52,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329880056] [2020-10-14 18:35:52,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:35:52,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 18:35:52,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648436195] [2020-10-14 18:35:52,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 18:35:52,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:35:52,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 18:35:52,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 18:35:52,073 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2020-10-14 18:35:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:35:53,936 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-14 18:35:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 18:35:53,940 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2020-10-14 18:35:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:35:53,941 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:35:53,941 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 18:35:53,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 18:35:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 18:35:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-14 18:35:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 18:35:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-14 18:35:53,947 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-10-14 18:35:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:35:53,947 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-14 18:35:53,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 18:35:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-14 18:35:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 18:35:53,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:35:53,948 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:35:53,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 18:35:53,948 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:35:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:35:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1064154366, now seen corresponding path program 52 times [2020-10-14 18:35:53,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:35:53,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72295789] [2020-10-14 18:35:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:35:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:35:54,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:35:58,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:35:58,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:35:58,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:35:58,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4793 [2020-10-14 18:35:58,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:35:58,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:35:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 18:35:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:35:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:35:58,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:00,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:36:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:00,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:00,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:00,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:36:00,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:00,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:36:00,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:00,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:36:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:36:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:36:00,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:36:00,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72295789] [2020-10-14 18:36:00,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:36:00,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 18:36:00,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628573899] [2020-10-14 18:36:00,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 18:36:00,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:36:00,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 18:36:00,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 18:36:00,826 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2020-10-14 18:36:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:36:02,789 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-14 18:36:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 18:36:02,790 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2020-10-14 18:36:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:36:02,791 INFO L225 Difference]: With dead ends: 69 [2020-10-14 18:36:02,791 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:36:02,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 18:36:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:36:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-14 18:36:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 18:36:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-14 18:36:02,797 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2020-10-14 18:36:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:36:02,798 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-14 18:36:02,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 18:36:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-14 18:36:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 18:36:02,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:36:02,799 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:36:02,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 18:36:02,799 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:36:02,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:36:02,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1334491759, now seen corresponding path program 53 times [2020-10-14 18:36:02,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:36:02,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871689042] [2020-10-14 18:36:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:36:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:02,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:07,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:07,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 18:36:07,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:07,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4660 [2020-10-14 18:36:07,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:07,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 18:36:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:36:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 18:36:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:09,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:36:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:09,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:09,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:09,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:36:09,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:09,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:36:09,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:09,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:09,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:36:09,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:36:09,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:36:09,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:36:09,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871689042] [2020-10-14 18:36:09,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:36:09,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 18:36:09,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445879339] [2020-10-14 18:36:09,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 18:36:09,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:36:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 18:36:09,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 18:36:09,617 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2020-10-14 18:36:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:36:11,590 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-14 18:36:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 18:36:11,590 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2020-10-14 18:36:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:36:11,591 INFO L225 Difference]: With dead ends: 70 [2020-10-14 18:36:11,591 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 18:36:11,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 18:36:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 18:36:11,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 18:36:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:36:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-14 18:36:11,597 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2020-10-14 18:36:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:36:11,597 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-14 18:36:11,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 18:36:11,598 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-14 18:36:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 18:36:11,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:36:11,598 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:36:11,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 18:36:11,599 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:36:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:36:11,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1616889694, now seen corresponding path program 54 times [2020-10-14 18:36:11,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:36:11,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809119411] [2020-10-14 18:36:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:36:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:11,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:16,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:16,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 18:36:16,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:16,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 18:36:16,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:16,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:16,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 18:36:16,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:36:16,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 18:36:16,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:18,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:36:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:18,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:18,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:18,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:36:18,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:18,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:36:18,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:18,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:18,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:36:18,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:36:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:36:18,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:36:18,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809119411] [2020-10-14 18:36:18,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:36:18,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 18:36:18,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437617361] [2020-10-14 18:36:18,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 18:36:18,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:36:18,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 18:36:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2976, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 18:36:18,880 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2020-10-14 18:36:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:36:21,038 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-10-14 18:36:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 18:36:21,039 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2020-10-14 18:36:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:36:21,040 INFO L225 Difference]: With dead ends: 71 [2020-10-14 18:36:21,040 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 18:36:21,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=272, Invalid=3034, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 18:36:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 18:36:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-14 18:36:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 18:36:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-14 18:36:21,045 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2020-10-14 18:36:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:36:21,045 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-14 18:36:21,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 18:36:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-14 18:36:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 18:36:21,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:36:21,046 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:36:21,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 18:36:21,047 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:36:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:36:21,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1379565775, now seen corresponding path program 55 times [2020-10-14 18:36:21,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:36:21,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809427701] [2020-10-14 18:36:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:36:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:21,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:26,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:26,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:36:26,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:26,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 18:36:26,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:26,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:26,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 18:36:26,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:36:26,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 18:36:26,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:28,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:36:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:28,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:28,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:28,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:36:28,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:28,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:36:28,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:28,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:28,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:36:28,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:36:28,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:36:28,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:36:28,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809427701] [2020-10-14 18:36:28,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:36:28,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 18:36:28,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823565270] [2020-10-14 18:36:28,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 18:36:28,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:36:28,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 18:36:28,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 18:36:28,391 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2020-10-14 18:36:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:36:30,525 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-14 18:36:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 18:36:30,526 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2020-10-14 18:36:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:36:30,527 INFO L225 Difference]: With dead ends: 72 [2020-10-14 18:36:30,527 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 18:36:30,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 18:36:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 18:36:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 18:36:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 18:36:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-14 18:36:30,531 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2020-10-14 18:36:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:36:30,532 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-14 18:36:30,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 18:36:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-14 18:36:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:36:30,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:36:30,533 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:36:30,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 18:36:30,533 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:36:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:36:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash 219595198, now seen corresponding path program 56 times [2020-10-14 18:36:30,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:36:30,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863167761] [2020-10-14 18:36:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:36:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:35,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:35,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 18:36:35,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:35,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 18:36:35,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:35,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:35,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 18:36:35,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:36:35,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:36:35,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:37,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:36:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:37,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:37,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:37,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:36:37,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:37,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:36:37,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:37,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:37,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:36:37,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:36:37,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:36:37,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:36:37,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863167761] [2020-10-14 18:36:37,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:36:37,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 18:36:37,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671929930] [2020-10-14 18:36:37,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 18:36:37,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:36:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 18:36:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 18:36:37,927 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2020-10-14 18:36:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:36:40,068 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-14 18:36:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 18:36:40,069 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2020-10-14 18:36:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:36:40,070 INFO L225 Difference]: With dead ends: 73 [2020-10-14 18:36:40,070 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 18:36:40,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 18:36:40,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 18:36:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-14 18:36:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 18:36:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-14 18:36:40,076 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2020-10-14 18:36:40,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:36:40,076 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-14 18:36:40,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 18:36:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-14 18:36:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 18:36:40,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:36:40,080 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:36:40,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 18:36:40,082 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:36:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:36:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1746022191, now seen corresponding path program 57 times [2020-10-14 18:36:40,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:36:40,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886322812] [2020-10-14 18:36:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:36:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:45,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:45,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 18:36:45,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:45,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-14 18:36:45,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:45,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:45,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-14 18:36:45,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:36:45,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 18:36:45,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:47,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:36:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:47,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:47,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:47,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:36:47,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:47,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:36:47,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:47,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:36:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:36:47,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:36:47,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:36:47,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886322812] [2020-10-14 18:36:47,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:36:47,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 18:36:47,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719486725] [2020-10-14 18:36:47,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 18:36:47,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:36:47,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 18:36:47,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 18:36:47,629 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2020-10-14 18:36:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:36:49,885 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-14 18:36:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 18:36:49,885 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2020-10-14 18:36:49,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:36:49,887 INFO L225 Difference]: With dead ends: 74 [2020-10-14 18:36:49,887 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 18:36:49,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 18:36:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 18:36:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-14 18:36:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 18:36:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-14 18:36:49,893 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2020-10-14 18:36:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:36:49,893 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-14 18:36:49,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-14 18:36:49,893 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-14 18:36:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 18:36:49,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:36:49,894 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:36:49,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 18:36:49,894 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:36:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:36:49,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1744348190, now seen corresponding path program 58 times [2020-10-14 18:36:49,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:36:49,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477258448] [2020-10-14 18:36:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:36:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:49,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:54,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:54,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:36:54,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:54,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:36:54,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:54,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:54,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-14 18:36:54,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:36:54,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 18:36:54,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:36:57,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:36:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:57,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:36:57,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:36:57,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:36:57,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:36:57,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:36:57,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:36:57,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:36:57,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:36:57,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:36:57,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:36:57,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:36:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:36:57,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477258448] [2020-10-14 18:36:57,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:36:57,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-14 18:36:57,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53160622] [2020-10-14 18:36:57,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-14 18:36:57,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:36:57,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-14 18:36:57,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 18:36:57,433 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2020-10-14 18:36:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:36:59,622 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-14 18:36:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 18:36:59,622 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2020-10-14 18:36:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:36:59,623 INFO L225 Difference]: With dead ends: 75 [2020-10-14 18:36:59,623 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:36:59,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 18:36:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:36:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-14 18:36:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 18:36:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-14 18:36:59,629 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2020-10-14 18:36:59,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:36:59,629 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-14 18:36:59,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-14 18:36:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-14 18:36:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 18:36:59,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:36:59,630 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:36:59,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 18:36:59,631 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:36:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:36:59,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1723319695, now seen corresponding path program 59 times [2020-10-14 18:36:59,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:36:59,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938600313] [2020-10-14 18:36:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:36:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:36:59,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:37:04,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:37:04,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:37:04,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:37:04,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 18:37:04,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:37:04,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:37:04,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-14 18:37:04,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:37:04,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 18:37:04,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:37:07,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:37:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:37:07,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:37:07,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:37:07,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:37:07,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:37:07,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:37:07,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:37:07,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:37:07,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:37:07,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:37:07,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:37:07,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:37:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:37:07,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938600313] [2020-10-14 18:37:07,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:37:07,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 18:37:07,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644294174] [2020-10-14 18:37:07,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 18:37:07,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:37:07,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 18:37:07,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 18:37:07,263 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2020-10-14 18:37:09,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:37:09,552 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-14 18:37:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-14 18:37:09,552 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2020-10-14 18:37:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:37:09,553 INFO L225 Difference]: With dead ends: 76 [2020-10-14 18:37:09,553 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 18:37:09,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 18:37:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 18:37:09,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-14 18:37:09,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 18:37:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-14 18:37:09,557 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2020-10-14 18:37:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:37:09,558 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-14 18:37:09,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-14 18:37:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-14 18:37:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 18:37:09,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:37:09,558 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:37:09,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 18:37:09,559 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:37:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:37:09,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1846841730, now seen corresponding path program 60 times [2020-10-14 18:37:09,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:37:09,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170232388] [2020-10-14 18:37:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:37:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:37:09,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:37:14,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:37:14,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 18:37:14,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:37:14,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:37:14,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:37:14,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:37:14,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-14 18:37:14,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:37:14,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:37:14,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:37:17,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:37:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:37:17,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:37:17,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:37:17,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:37:17,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:37:17,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:37:17,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:37:17,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:37:17,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:37:17,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:37:17,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:37:17,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:37:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:37:17,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170232388] [2020-10-14 18:37:17,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:37:17,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-14 18:37:17,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678426860] [2020-10-14 18:37:17,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-14 18:37:17,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:37:17,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-14 18:37:17,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 18:37:17,385 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2020-10-14 18:37:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:37:19,844 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-10-14 18:37:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-14 18:37:19,845 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2020-10-14 18:37:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:37:19,846 INFO L225 Difference]: With dead ends: 77 [2020-10-14 18:37:19,846 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 18:37:19,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 18:37:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 18:37:19,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-14 18:37:19,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 18:37:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-14 18:37:19,852 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2020-10-14 18:37:19,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:37:19,852 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-14 18:37:19,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-14 18:37:19,852 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-14 18:37:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:37:19,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:37:19,853 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:37:19,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 18:37:19,853 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:37:19,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:37:19,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1381057519, now seen corresponding path program 61 times [2020-10-14 18:37:19,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:37:19,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392912997] [2020-10-14 18:37:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:37:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:37:19,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:37:24,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:37:24,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:37:24,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:37:24,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-14 18:37:24,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:37:24,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:37:24,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-14 18:37:24,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 18:37:24,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 18:37:24,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:37:27,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:37:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:37:27,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:37:27,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:37:27,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 18:37:27,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:37:27,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:37:27,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:37:27,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:37:27,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:37:27,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:37:27,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:37:27,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:37:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:37:27,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392912997] [2020-10-14 18:37:27,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:37:27,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-14 18:37:27,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378969147] [2020-10-14 18:37:27,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-14 18:37:27,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:37:27,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-14 18:37:27,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 18:37:27,751 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2020-10-14 18:37:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:37:30,203 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-14 18:37:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-14 18:37:30,203 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2020-10-14 18:37:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:37:30,204 INFO L225 Difference]: With dead ends: 78 [2020-10-14 18:37:30,204 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 18:37:30,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 18:37:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 18:37:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-14 18:37:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 18:37:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-14 18:37:30,208 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2020-10-14 18:37:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:37:30,209 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-14 18:37:30,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-14 18:37:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-14 18:37:30,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 18:37:30,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:37:30,209 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:37:30,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 18:37:30,210 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:37:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:37:30,210 INFO L82 PathProgramCache]: Analyzing trace with hash 173351134, now seen corresponding path program 62 times [2020-10-14 18:37:30,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:37:30,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048488665] [2020-10-14 18:37:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:37:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:37:30,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking...