/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=NARROWEST --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/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:52:41,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:52:41,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:52:42,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:52:42,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:52:42,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:52:42,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:52:42,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:52:42,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:52:42,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:52:42,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:52:42,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:52:42,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:52:42,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:52:42,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:52:42,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:52:42,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:52:42,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:52:42,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:52:42,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:52:42,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:52:42,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:52:42,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:52:42,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:52:42,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:52:42,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:52:42,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:52:42,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:52:42,064 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:52:42,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:52:42,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:52:42,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:52:42,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:52:42,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:52:42,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:52:42,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:52:42,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:52:42,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:52:42,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:52:42,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:52:42,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:52:42,078 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:52:42,113 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:52:42,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:52:42,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:52:42,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:52:42,116 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:52:42,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:52:42,116 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:52:42,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:52:42,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:52:42,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:52:42,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:52:42,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:52:42,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:52:42,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:52:42,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:52:42,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:52:42,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:52:42,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:52:42,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:52:42,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:52:42,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:52:42,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:52:42,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:52:42,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:52:42,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:52:42,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:52:42,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:52:42,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:52:42,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:52:42,122 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:52:42,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:52:42,440 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:52:42,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:52:42,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:52:42,445 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:52:42,445 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i [2020-10-13 10:52:42,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c66527e8/b6ea98d336444b238cf623e609ddb98e/FLAG7a2b6f4a9 [2020-10-13 10:52:42,936 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:52:42,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_2.i [2020-10-13 10:52:42,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c66527e8/b6ea98d336444b238cf623e609ddb98e/FLAG7a2b6f4a9 [2020-10-13 10:52:43,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c66527e8/b6ea98d336444b238cf623e609ddb98e [2020-10-13 10:52:43,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:52:43,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:52:43,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:52:43,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:52:43,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:52:43,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:52:43" (1/1) ... [2020-10-13 10:52:43,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e2859c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43, skipping insertion in model container [2020-10-13 10:52:43,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:52:43" (1/1) ... [2020-10-13 10:52:43,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:52:43,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:52:43,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:52:43,481 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:52:43,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:52:43,504 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:52:43,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43 WrapperNode [2020-10-13 10:52:43,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:52:43,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:52:43,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:52:43,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:52:43,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43" (1/1) ... [2020-10-13 10:52:43,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43" (1/1) ... [2020-10-13 10:52:43,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43" (1/1) ... [2020-10-13 10:52:43,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43" (1/1) ... [2020-10-13 10:52:43,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43" (1/1) ... [2020-10-13 10:52:43,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43" (1/1) ... [2020-10-13 10:52:43,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43" (1/1) ... [2020-10-13 10:52:43,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:52:43,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:52:43,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:52:43,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:52:43,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:52:43,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:52:43,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:52:43,680 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:52:43,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:52:43,680 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:52:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:52:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:52:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:52:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:52:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:52:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:52:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:52:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:52:43,826 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:52:43,826 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:52:43,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:52:43 BoogieIcfgContainer [2020-10-13 10:52:43,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:52:43,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:52:43,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:52:43,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:52:43,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:52:43" (1/3) ... [2020-10-13 10:52:43,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d53fb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:52:43, skipping insertion in model container [2020-10-13 10:52:43,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:52:43" (2/3) ... [2020-10-13 10:52:43,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d53fb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:52:43, skipping insertion in model container [2020-10-13 10:52:43,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:52:43" (3/3) ... [2020-10-13 10:52:43,836 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2020-10-13 10:52:43,846 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:52:43,853 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:52:43,867 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:52:43,890 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:52:43,890 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:52:43,890 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:52:43,890 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:52:43,891 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:52:43,891 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:52:43,891 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:52:43,891 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:52:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 10:52:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:52:43,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:43,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:43,913 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:43,919 INFO L82 PathProgramCache]: Analyzing trace with hash 650151859, now seen corresponding path program 1 times [2020-10-13 10:52:43,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:43,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242661767] [2020-10-13 10:52:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:44,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:44,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:52:44,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:44,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-13 10:52:44,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:44,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:52:44,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:44,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:52:44,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:52:44,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:44,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:44,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:44,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:44,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:52:44,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:44,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:44,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:44,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:44,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:44,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242661767] [2020-10-13 10:52:44,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:52:44,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:52:44,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624034291] [2020-10-13 10:52:44,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:52:44,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:44,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:52:44,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:52:44,161 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-13 10:52:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:44,197 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-13 10:52:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:52:44,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:52:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:44,207 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:52:44,208 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:52:44,211 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 [2020-10-13 10:52:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:52:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-13 10:52:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:52:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-13 10:52:44,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-10-13 10:52:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:44,258 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-13 10:52:44,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:52:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-13 10:52:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:52:44,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:44,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:44,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:52:44,262 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1133927695, now seen corresponding path program 1 times [2020-10-13 10:52:44,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:44,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822327460] [2020-10-13 10:52:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:44,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:44,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:52:44,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:44,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-13 10:52:44,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:44,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:52:44,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:52:44,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:44,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:44,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:44,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:44,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:44,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:52:44,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:44,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:44,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:44,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822327460] [2020-10-13 10:52:44,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:44,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:52:44,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376004685] [2020-10-13 10:52:44,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:52:44,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:44,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:52:44,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:52:44,414 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-13 10:52:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:44,436 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-13 10:52:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:52:44,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-13 10:52:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:44,439 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:52:44,439 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:52:44,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:52:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:52:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:52:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:52:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-13 10:52:44,446 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-13 10:52:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:44,446 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-13 10:52:44,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:52:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-13 10:52:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:52:44,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:44,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:44,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:52:44,448 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:44,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1942427985, now seen corresponding path program 2 times [2020-10-13 10:52:44,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:44,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017417648] [2020-10-13 10:52:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:44,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:44,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:52:44,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:44,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-13 10:52:44,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:52:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:52:44,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:44,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:44,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:44,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:44,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:44,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:52:44,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:44,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:44,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017417648] [2020-10-13 10:52:44,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:44,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:52:44,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044676265] [2020-10-13 10:52:44,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:52:44,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:44,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:52:44,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:52:44,569 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-13 10:52:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:44,611 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-13 10:52:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:52:44,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 10:52:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:44,613 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:52:44,613 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:52:44,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:52:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:52:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-13 10:52:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:52:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-13 10:52:44,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-13 10:52:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:44,619 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-13 10:52:44,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:52:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-13 10:52:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:52:44,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:44,620 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:44,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:52:44,621 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1522126099, now seen corresponding path program 3 times [2020-10-13 10:52:44,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:44,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988788974] [2020-10-13 10:52:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:44,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:44,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:52:44,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:44,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-13 10:52:44,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:44,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:52:44,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:44,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:52:44,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:44,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:44,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:44,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:44,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:44,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:52:44,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:44,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:44,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:44,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988788974] [2020-10-13 10:52:44,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:44,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:52:44,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491235366] [2020-10-13 10:52:44,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:52:44,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:44,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:52:44,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:52:44,814 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-13 10:52:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:44,841 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-13 10:52:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:52:44,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 10:52:44,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:44,843 INFO L225 Difference]: With dead ends: 25 [2020-10-13 10:52:44,843 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 10:52:44,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:52:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 10:52:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-13 10:52:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:52:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-13 10:52:44,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-13 10:52:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:44,849 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-13 10:52:44,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:52:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-13 10:52:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:52:44,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:44,850 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:44,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:52:44,851 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:44,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:44,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1338939477, now seen corresponding path program 4 times [2020-10-13 10:52:44,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:44,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141779639] [2020-10-13 10:52:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:44,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:44,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:52:44,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:44,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-13 10:52:44,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:44,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:52:44,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:52:44,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:52:45,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:45,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:52:45,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:45,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:45,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:45,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:45,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141779639] [2020-10-13 10:52:45,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:45,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:52:45,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847822211] [2020-10-13 10:52:45,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:52:45,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:52:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:52:45,015 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-13 10:52:45,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:45,043 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-13 10:52:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:52:45,044 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-13 10:52:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:45,045 INFO L225 Difference]: With dead ends: 27 [2020-10-13 10:52:45,045 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:52:45,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:52:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:52:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-13 10:52:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:52:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-13 10:52:45,051 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-13 10:52:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:45,051 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-13 10:52:45,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:52:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-13 10:52:45,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:52:45,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:45,053 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:45,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:52:45,053 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1390254871, now seen corresponding path program 5 times [2020-10-13 10:52:45,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:45,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905004123] [2020-10-13 10:52:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:52:45,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-13 10:52:45,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:52:45,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:45,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:52:45,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:45,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:52:45,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:45,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:45,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905004123] [2020-10-13 10:52:45,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:45,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:52:45,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283897076] [2020-10-13 10:52:45,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:52:45,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:45,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:52:45,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:52:45,227 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-13 10:52:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:45,265 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-13 10:52:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:52:45,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-13 10:52:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:45,267 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:52:45,267 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:52:45,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:52:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:52:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-13 10:52:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:52:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-13 10:52:45,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-13 10:52:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:45,273 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-13 10:52:45,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:52:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-13 10:52:45,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:52:45,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:45,274 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:45,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:52:45,274 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:45,275 INFO L82 PathProgramCache]: Analyzing trace with hash 835259047, now seen corresponding path program 6 times [2020-10-13 10:52:45,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:45,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227960219] [2020-10-13 10:52:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:52:45,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 10:52:45,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:52:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:52:45,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:45,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:45,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:45,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:45,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227960219] [2020-10-13 10:52:45,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:45,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:52:45,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760730204] [2020-10-13 10:52:45,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:52:45,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:45,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:52:45,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:52:45,410 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-13 10:52:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:45,441 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-13 10:52:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:52:45,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-13 10:52:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:45,443 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:52:45,443 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:52:45,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:52:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:52:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 10:52:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:52:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-13 10:52:45,449 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-13 10:52:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:45,449 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-13 10:52:45,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:52:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-13 10:52:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:52:45,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:45,451 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:45,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:52:45,451 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:45,451 INFO L82 PathProgramCache]: Analyzing trace with hash 660420837, now seen corresponding path program 7 times [2020-10-13 10:52:45,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:45,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321507397] [2020-10-13 10:52:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:52:45,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-13 10:52:45,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:52:45,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:45,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:52:45,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:45,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:45,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:45,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:45,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:45,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321507397] [2020-10-13 10:52:45,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:45,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:52:45,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633576858] [2020-10-13 10:52:45,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:52:45,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:45,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:52:45,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:52:45,600 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-13 10:52:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:45,636 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-13 10:52:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:52:45,637 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-13 10:52:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:45,638 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:52:45,638 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 10:52:45,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:52:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 10:52:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 10:52:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:52:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-13 10:52:45,644 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-13 10:52:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:45,644 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-13 10:52:45,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:52:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-13 10:52:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:52:45,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:45,646 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:45,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:52:45,646 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:45,646 INFO L82 PathProgramCache]: Analyzing trace with hash 144625571, now seen corresponding path program 8 times [2020-10-13 10:52:45,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:45,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657625233] [2020-10-13 10:52:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:52:45,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-13 10:52:45,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:52:45,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:45,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:52:45,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:45,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:45,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:45,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:45,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:45,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:45,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657625233] [2020-10-13 10:52:45,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:45,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:52:45,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312305451] [2020-10-13 10:52:45,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:52:45,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:45,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:52:45,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:52:45,821 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-13 10:52:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:45,864 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-13 10:52:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:52:45,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-13 10:52:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:45,865 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:52:45,866 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 10:52:45,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:52:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 10:52:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 10:52:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:52:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-13 10:52:45,871 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-13 10:52:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:45,871 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-13 10:52:45,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:52:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-13 10:52:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:52:45,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:45,872 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:45,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:52:45,873 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1613386015, now seen corresponding path program 9 times [2020-10-13 10:52:45,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:45,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632649216] [2020-10-13 10:52:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:45,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:45,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:52:45,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:45,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-13 10:52:45,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:52:45,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:45,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:52:45,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:46,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:46,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:46,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:46,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:46,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632649216] [2020-10-13 10:52:46,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:46,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:52:46,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854517483] [2020-10-13 10:52:46,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:52:46,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:52:46,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:52:46,071 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-13 10:52:46,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:46,114 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-13 10:52:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:52:46,115 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-13 10:52:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:46,116 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:52:46,116 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:52:46,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:52:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:52:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 10:52:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:52:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-13 10:52:46,121 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-13 10:52:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:46,121 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-13 10:52:46,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:52:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-13 10:52:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:52:46,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:46,122 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:46,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:52:46,123 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:46,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:46,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1154594463, now seen corresponding path program 10 times [2020-10-13 10:52:46,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:46,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684721798] [2020-10-13 10:52:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:52:46,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:46,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-13 10:52:46,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:52:46,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:46,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:52:46,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:46,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:46,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:46,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:46,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:46,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:46,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:46,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684721798] [2020-10-13 10:52:46,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:46,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:52:46,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123973852] [2020-10-13 10:52:46,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:52:46,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:46,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:52:46,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:52:46,300 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-13 10:52:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:46,339 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-13 10:52:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:52:46,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-13 10:52:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:46,340 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:52:46,340 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 10:52:46,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:52:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 10:52:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 10:52:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:52:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-13 10:52:46,345 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-13 10:52:46,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:46,346 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-13 10:52:46,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:52:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-13 10:52:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:52:46,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:46,347 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:46,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:52:46,348 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:46,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1695889699, now seen corresponding path program 11 times [2020-10-13 10:52:46,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:46,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881028249] [2020-10-13 10:52:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:52:46,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:46,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-13 10:52:46,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:52:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:52:46,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:46,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:46,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:46,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:46,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:46,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:46,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:46,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881028249] [2020-10-13 10:52:46,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:46,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:52:46,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208394664] [2020-10-13 10:52:46,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:52:46,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:46,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:52:46,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:52:46,598 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-10-13 10:52:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:46,641 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-13 10:52:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:52:46,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-13 10:52:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:46,642 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:52:46,642 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:52:46,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:52:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:52:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 10:52:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:52:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-13 10:52:46,647 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-13 10:52:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:46,647 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-13 10:52:46,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:52:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-13 10:52:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:52:46,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:46,649 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:46,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:52:46,649 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -822034533, now seen corresponding path program 12 times [2020-10-13 10:52:46,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:46,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435217904] [2020-10-13 10:52:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:52:46,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:46,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-13 10:52:46,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:52:46,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:46,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:52:46,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:46,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:46,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:46,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:46,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:46,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:46,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:46,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:46,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435217904] [2020-10-13 10:52:46,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:46,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:52:46,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962742846] [2020-10-13 10:52:46,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:52:46,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:52:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:52:46,868 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-13 10:52:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:46,914 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-13 10:52:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:52:46,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-13 10:52:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:46,916 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:52:46,916 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:52:46,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:52:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:52:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 10:52:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:52:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-13 10:52:46,921 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-13 10:52:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:46,921 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-13 10:52:46,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:52:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-13 10:52:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:52:46,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:46,922 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:46,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:52:46,923 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:46,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1434157273, now seen corresponding path program 13 times [2020-10-13 10:52:46,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:46,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833006952] [2020-10-13 10:52:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:47,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:52:47,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:47,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-13 10:52:47,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:52:47,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:47,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:52:47,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:47,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:47,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:47,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:47,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:47,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:47,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:47,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:47,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:47,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:47,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:47,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833006952] [2020-10-13 10:52:47,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:47,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:52:47,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170145078] [2020-10-13 10:52:47,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:52:47,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:47,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:52:47,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:52:47,166 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-10-13 10:52:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:47,211 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-13 10:52:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:52:47,211 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-13 10:52:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:47,212 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:52:47,212 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:52:47,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:52:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:52:47,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 10:52:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:52:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-13 10:52:47,217 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-13 10:52:47,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:47,217 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-13 10:52:47,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:52:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-13 10:52:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:52:47,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:47,218 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:47,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:52:47,219 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:47,219 INFO L82 PathProgramCache]: Analyzing trace with hash 675998359, now seen corresponding path program 14 times [2020-10-13 10:52:47,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:47,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173690332] [2020-10-13 10:52:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:47,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:47,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:52:47,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:47,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-13 10:52:47,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:47,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:52:47,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:47,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:52:47,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:47,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:47,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:47,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:47,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:47,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:47,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:47,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173690332] [2020-10-13 10:52:47,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:47,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:52:47,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530877537] [2020-10-13 10:52:47,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:52:47,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:47,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:52:47,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:52:47,485 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-13 10:52:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:47,538 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-13 10:52:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:52:47,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-13 10:52:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:47,539 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:52:47,539 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:52:47,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:52:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:52:47,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 10:52:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:52:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-13 10:52:47,544 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-13 10:52:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:47,544 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-13 10:52:47,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:52:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-13 10:52:47,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:52:47,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:47,545 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:47,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:52:47,546 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:47,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:47,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2065244971, now seen corresponding path program 15 times [2020-10-13 10:52:47,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:47,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807303818] [2020-10-13 10:52:47,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:47,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:47,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:52:47,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:47,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-13 10:52:47,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:52:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:52:47,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:47,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:47,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:47,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:47,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:47,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:47,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:47,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:47,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807303818] [2020-10-13 10:52:47,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:47,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:52:47,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96822972] [2020-10-13 10:52:47,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:52:47,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:47,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:52:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:52:47,853 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-10-13 10:52:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:47,909 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-13 10:52:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:52:47,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-13 10:52:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:47,911 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:52:47,911 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:52:47,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:52:47,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:52:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 10:52:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:52:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-13 10:52:47,916 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-13 10:52:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:47,916 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-13 10:52:47,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:52:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-13 10:52:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:52:47,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:47,918 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:47,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:52:47,918 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:47,918 INFO L82 PathProgramCache]: Analyzing trace with hash 709834643, now seen corresponding path program 16 times [2020-10-13 10:52:47,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:47,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164486366] [2020-10-13 10:52:47,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:47,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:48,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:48,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:52:48,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:48,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-13 10:52:48,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:52:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:52:48,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:48,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:48,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:48,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:48,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:48,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:48,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:48,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:48,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:48,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164486366] [2020-10-13 10:52:48,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:48,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:52:48,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350765802] [2020-10-13 10:52:48,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:52:48,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:48,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:52:48,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:52:48,227 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-10-13 10:52:48,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:48,295 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-13 10:52:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:52:48,296 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-13 10:52:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:48,297 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:52:48,297 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:52:48,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:52:48,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:52:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 10:52:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:52:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-13 10:52:48,306 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-13 10:52:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:48,306 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-13 10:52:48,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:52:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-13 10:52:48,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:52:48,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:48,307 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:48,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:52:48,308 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash 386652881, now seen corresponding path program 17 times [2020-10-13 10:52:48,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:48,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106683550] [2020-10-13 10:52:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:48,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:48,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:48,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:52:48,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:48,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-13 10:52:48,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:48,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:52:48,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:52:48,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:48,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:48,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:48,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:48,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:48,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:48,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:52:48,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:48,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:48,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:48,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:48,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:48,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106683550] [2020-10-13 10:52:48,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:48,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:52:48,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43476825] [2020-10-13 10:52:48,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:52:48,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:48,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:52:48,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:52:48,683 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-10-13 10:52:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:48,754 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-13 10:52:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:52:48,757 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-13 10:52:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:48,758 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:52:48,758 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 10:52:48,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:52:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 10:52:48,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-13 10:52:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:52:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-13 10:52:48,768 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-13 10:52:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:48,769 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-13 10:52:48,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:52:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-13 10:52:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:52:48,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:48,771 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:48,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:52:48,771 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash -953375089, now seen corresponding path program 18 times [2020-10-13 10:52:48,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:48,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070734006] [2020-10-13 10:52:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:48,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:48,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:48,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:52:48,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:48,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-13 10:52:48,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:52:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:52:48,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:49,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:49,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:49,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:49,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:49,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:49,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:49,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070734006] [2020-10-13 10:52:49,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:49,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:52:49,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073583488] [2020-10-13 10:52:49,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:52:49,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:49,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:52:49,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:52:49,154 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-13 10:52:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:49,210 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-13 10:52:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:52:49,210 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-13 10:52:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:49,211 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:52:49,211 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:52:49,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:52:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:52:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-13 10:52:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:52:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-13 10:52:49,216 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-13 10:52:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:49,217 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-13 10:52:49,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:52:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-13 10:52:49,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:52:49,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:49,218 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:49,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:52:49,218 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:49,219 INFO L82 PathProgramCache]: Analyzing trace with hash -230065459, now seen corresponding path program 19 times [2020-10-13 10:52:49,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:49,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687748599] [2020-10-13 10:52:49,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:49,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:49,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:52:49,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:49,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-13 10:52:49,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:52:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:52:49,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:49,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:49,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:49,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:49,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:49,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:49,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:49,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:49,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:49,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687748599] [2020-10-13 10:52:49,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:49,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:52:49,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942933847] [2020-10-13 10:52:49,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:52:49,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:49,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:52:49,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:52:49,673 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-10-13 10:52:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:49,760 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-13 10:52:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:52:49,761 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-13 10:52:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:49,761 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:52:49,761 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:52:49,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:52:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:52:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-13 10:52:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:52:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-13 10:52:49,766 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-13 10:52:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:49,766 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-13 10:52:49,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:52:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-13 10:52:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:52:49,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:49,767 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:49,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:52:49,767 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:49,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:49,768 INFO L82 PathProgramCache]: Analyzing trace with hash -914212981, now seen corresponding path program 20 times [2020-10-13 10:52:49,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:49,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763525415] [2020-10-13 10:52:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:49,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:49,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:52:49,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:49,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-13 10:52:49,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:49,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:52:49,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:49,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:52:49,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:50,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:50,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:50,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:50,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:50,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:50,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:50,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:50,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:50,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763525415] [2020-10-13 10:52:50,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:50,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:52:50,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127533920] [2020-10-13 10:52:50,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:52:50,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:52:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:52:50,207 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-10-13 10:52:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:50,289 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-13 10:52:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:52:50,289 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-13 10:52:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:50,290 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:52:50,290 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:52:50,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:52:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:52:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 10:52:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:52:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-13 10:52:50,295 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-13 10:52:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:50,295 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-13 10:52:50,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:52:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-13 10:52:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:52:50,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:50,296 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:50,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:52:50,296 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:50,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1249985335, now seen corresponding path program 21 times [2020-10-13 10:52:50,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:50,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173264800] [2020-10-13 10:52:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:50,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:50,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:50,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:52:50,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:50,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-13 10:52:50,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:50,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:52:50,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:50,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:52:50,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:50,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:50,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:50,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:50,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:50,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:50,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:50,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:50,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:50,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173264800] [2020-10-13 10:52:50,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:50,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:52:50,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112658057] [2020-10-13 10:52:50,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:52:50,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:50,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:52:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:52:50,778 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-13 10:52:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:50,847 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-13 10:52:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:52:50,847 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-13 10:52:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:50,848 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:52:50,848 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:52:50,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:52:50,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:52:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-13 10:52:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:52:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-13 10:52:50,852 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-13 10:52:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:50,852 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-13 10:52:50,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:52:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-13 10:52:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:52:50,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:50,853 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:50,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:52:50,854 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:50,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1804670329, now seen corresponding path program 22 times [2020-10-13 10:52:50,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:50,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51929640] [2020-10-13 10:52:50,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:50,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:51,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:51,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:52:51,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-13 10:52:51,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:52:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:52:51,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:51,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:51,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:51,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:51,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:51,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:51,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:51,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:51,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:51,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:51,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:51,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:51,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51929640] [2020-10-13 10:52:51,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:51,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:52:51,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739756006] [2020-10-13 10:52:51,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:52:51,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:52:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:52:51,346 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-10-13 10:52:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:51,411 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-13 10:52:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:52:51,411 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-13 10:52:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:51,412 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:52:51,412 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 10:52:51,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:52:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 10:52:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-13 10:52:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:52:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-13 10:52:51,419 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-13 10:52:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:51,419 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-13 10:52:51,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:52:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-13 10:52:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:52:51,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:51,420 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:51,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:52:51,420 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:51,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:51,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2013962437, now seen corresponding path program 23 times [2020-10-13 10:52:51,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:51,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404562094] [2020-10-13 10:52:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:51,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:51,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:51,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:52:51,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:51,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-13 10:52:51,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:51,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:52:51,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:51,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:52:51,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:51,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:51,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:51,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:51,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:51,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:51,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:51,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:51,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:51,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404562094] [2020-10-13 10:52:51,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:51,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:52:51,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648046148] [2020-10-13 10:52:51,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:52:51,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:51,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:52:51,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:52:51,980 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-13 10:52:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:52,057 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-13 10:52:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:52:52,057 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-13 10:52:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:52,058 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:52:52,058 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:52:52,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:52:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:52:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-13 10:52:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:52:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-13 10:52:52,064 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-13 10:52:52,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:52,064 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-13 10:52:52,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:52:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-13 10:52:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:52:52,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:52,069 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:52,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:52:52,069 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:52,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash -476987517, now seen corresponding path program 24 times [2020-10-13 10:52:52,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:52,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701194344] [2020-10-13 10:52:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:52,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:52,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:52:52,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-13 10:52:52,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:52:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:52:52,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:52,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:52,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:52,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:52,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:52,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:52,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:52,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:52,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:52,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:52,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:52,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701194344] [2020-10-13 10:52:52,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:52,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:52:52,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962256898] [2020-10-13 10:52:52,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:52:52,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:52,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:52:52,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:52:52,630 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-10-13 10:52:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:52,724 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-13 10:52:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:52:52,725 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-13 10:52:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:52,725 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:52:52,725 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:52:52,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:52:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:52:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-13 10:52:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:52:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-13 10:52:52,729 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-13 10:52:52,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:52,729 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-13 10:52:52,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:52:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-13 10:52:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:52:52,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:52,730 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:52,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:52:52,731 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1983109439, now seen corresponding path program 25 times [2020-10-13 10:52:52,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:52,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158978304] [2020-10-13 10:52:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:52,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:52,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:52:52,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:52,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-13 10:52:52,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:52:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:52:52,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:53,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:53,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:53,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:53,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:53,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:53,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:53,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:53,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:53,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:53,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:53,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:53,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158978304] [2020-10-13 10:52:53,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:53,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:52:53,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067503310] [2020-10-13 10:52:53,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:52:53,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:52:53,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:52:53,294 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-10-13 10:52:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:53,371 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-13 10:52:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:52:53,371 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-13 10:52:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:53,372 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:52:53,372 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:52:53,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:52:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:52:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-13 10:52:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:52:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-13 10:52:53,376 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-13 10:52:53,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:53,376 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-13 10:52:53,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:52:53,376 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-13 10:52:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:52:53,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:53,377 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:53,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:52:53,377 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:53,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1962297729, now seen corresponding path program 26 times [2020-10-13 10:52:53,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:53,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818333429] [2020-10-13 10:52:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:53,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:53,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:53,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:52:53,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:53,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-13 10:52:53,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:52:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:52:53,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:53,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:53,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:53,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:53,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:53,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:53,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:53,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:53,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:53,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:53,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:53,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818333429] [2020-10-13 10:52:53,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:53,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:52:53,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047030480] [2020-10-13 10:52:53,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:52:53,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:53,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:52:53,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:52:53,976 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-10-13 10:52:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:54,069 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-10-13 10:52:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:52:54,070 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-13 10:52:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:54,071 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:52:54,071 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:52:54,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:52:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:52:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-13 10:52:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:52:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-13 10:52:54,079 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-13 10:52:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:54,080 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-13 10:52:54,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:52:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-13 10:52:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:52:54,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:54,081 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:54,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:52:54,081 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:54,082 INFO L82 PathProgramCache]: Analyzing trace with hash 857886397, now seen corresponding path program 27 times [2020-10-13 10:52:54,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:54,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538522278] [2020-10-13 10:52:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:54,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:54,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:52:54,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:54,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-13 10:52:54,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:54,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:52:54,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:54,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:52:54,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:54,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:54,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:54,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:54,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:54,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:54,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:54,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:54,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:54,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:54,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:54,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538522278] [2020-10-13 10:52:54,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:54,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:52:54,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215573302] [2020-10-13 10:52:54,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:52:54,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:52:54,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:52:54,760 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-10-13 10:52:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:54,857 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-13 10:52:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:52:54,857 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-13 10:52:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:54,858 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:52:54,858 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:52:54,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:52:54,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:52:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-13 10:52:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:52:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-13 10:52:54,862 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-13 10:52:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:54,862 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-13 10:52:54,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:52:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-13 10:52:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:52:54,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:54,863 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:54,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:52:54,863 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash 930467707, now seen corresponding path program 28 times [2020-10-13 10:52:54,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:54,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782511595] [2020-10-13 10:52:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:54,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:55,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:55,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:52:55,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:55,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-13 10:52:55,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:55,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:52:55,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:55,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:52:55,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:55,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:55,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:55,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:55,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:55,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:55,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:55,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:55,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:55,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:55,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:55,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:55,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782511595] [2020-10-13 10:52:55,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:55,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:52:55,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982382737] [2020-10-13 10:52:55,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:52:55,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:55,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:52:55,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:52:55,597 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-10-13 10:52:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:55,709 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-13 10:52:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:52:55,709 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-13 10:52:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:55,710 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:52:55,710 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 10:52:55,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:52:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 10:52:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-13 10:52:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:52:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-13 10:52:55,714 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-13 10:52:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:55,714 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-13 10:52:55,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:52:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-13 10:52:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:52:55,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:55,715 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:55,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:52:55,715 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:55,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:55,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1961629881, now seen corresponding path program 29 times [2020-10-13 10:52:55,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:55,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122436601] [2020-10-13 10:52:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:55,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:55,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:55,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:52:55,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:55,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-13 10:52:55,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:55,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:52:55,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:55,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:52:55,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:56,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:56,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:56,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:56,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:56,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:56,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:56,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:56,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:56,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:56,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:56,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:56,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122436601] [2020-10-13 10:52:56,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:56,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:52:56,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736100772] [2020-10-13 10:52:56,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:52:56,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:56,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:52:56,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:52:56,496 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-10-13 10:52:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:56,583 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-10-13 10:52:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:52:56,586 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-13 10:52:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:56,587 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:52:56,587 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:52:56,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:52:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:52:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-13 10:52:56,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 10:52:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-13 10:52:56,592 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-13 10:52:56,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:56,592 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-13 10:52:56,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:52:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-13 10:52:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:52:56,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:56,593 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:56,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:52:56,594 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:56,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:56,594 INFO L82 PathProgramCache]: Analyzing trace with hash 771033719, now seen corresponding path program 30 times [2020-10-13 10:52:56,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:56,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760629611] [2020-10-13 10:52:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:56,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:56,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:56,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:52:56,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:56,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-13 10:52:56,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:52:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:52:56,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:57,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:57,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:57,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:57,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:57,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:57,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:57,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:57,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:57,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760629611] [2020-10-13 10:52:57,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:57,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:52:57,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826945413] [2020-10-13 10:52:57,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:52:57,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:57,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:52:57,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:52:57,372 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-10-13 10:52:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:57,490 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-10-13 10:52:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:52:57,491 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-13 10:52:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:57,492 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:52:57,492 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:52:57,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:52:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:52:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 10:52:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:52:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-13 10:52:57,496 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-13 10:52:57,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:57,496 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-13 10:52:57,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:52:57,496 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-13 10:52:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:52:57,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:57,497 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:57,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:52:57,497 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash -930577227, now seen corresponding path program 31 times [2020-10-13 10:52:57,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:57,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062167414] [2020-10-13 10:52:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:57,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:57,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:52:57,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:57,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-13 10:52:57,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:52:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:57,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:52:57,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:58,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:58,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:58,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:58,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:58,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:58,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:58,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:58,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:58,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062167414] [2020-10-13 10:52:58,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:58,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:52:58,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031388674] [2020-10-13 10:52:58,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:52:58,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:58,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:52:58,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:52:58,280 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-10-13 10:52:58,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:58,369 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-10-13 10:52:58,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:52:58,370 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-13 10:52:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:58,371 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:52:58,371 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 10:52:58,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:52:58,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 10:52:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-13 10:52:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:52:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-13 10:52:58,375 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-13 10:52:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:58,375 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-13 10:52:58,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:52:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-13 10:52:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:52:58,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:58,376 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:58,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:52:58,376 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash 203843443, now seen corresponding path program 32 times [2020-10-13 10:52:58,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:58,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705283595] [2020-10-13 10:52:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:58,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:58,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:58,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:52:58,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-13 10:52:58,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:52:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:52:58,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:59,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:59,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:59,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:59,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:59,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:59,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:59,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:59,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:59,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705283595] [2020-10-13 10:52:59,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:59,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:52:59,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269817699] [2020-10-13 10:52:59,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:52:59,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:59,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:52:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:52:59,275 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-13 10:52:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:59,388 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-10-13 10:52:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:52:59,391 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-13 10:52:59,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:59,392 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:52:59,392 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:52:59,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:52:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:52:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 10:52:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:52:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-13 10:52:59,399 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-10-13 10:52:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:59,401 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-13 10:52:59,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:52:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-13 10:52:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:52:59,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:59,402 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:59,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:52:59,402 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:59,403 INFO L82 PathProgramCache]: Analyzing trace with hash -539585871, now seen corresponding path program 33 times [2020-10-13 10:52:59,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:59,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211893592] [2020-10-13 10:52:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:59,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:59,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 10:52:59,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:59,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-13 10:52:59,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:52:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:52:59,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:53:00,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:00,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:00,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:00,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:00,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:00,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:00,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:00,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:00,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:00,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:00,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:00,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211893592] [2020-10-13 10:53:00,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:00,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:53:00,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497694289] [2020-10-13 10:53:00,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:53:00,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:00,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:53:00,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:53:00,531 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-10-13 10:53:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:00,640 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-10-13 10:53:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:53:00,640 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-13 10:53:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:00,641 INFO L225 Difference]: With dead ends: 85 [2020-10-13 10:53:00,641 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 10:53:00,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:53:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 10:53:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-13 10:53:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:53:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-13 10:53:00,646 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-10-13 10:53:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:00,647 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-13 10:53:00,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:53:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-13 10:53:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 10:53:00,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:00,648 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:00,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:53:00,648 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:00,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:00,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2010585489, now seen corresponding path program 34 times [2020-10-13 10:53:00,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:00,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117047935] [2020-10-13 10:53:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:00,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:00,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:00,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:53:00,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:00,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-13 10:53:00,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:00,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:53:00,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:00,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:53:00,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:01,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:01,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:01,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:01,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:01,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:01,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:01,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:01,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:01,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:01,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:01,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:01,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117047935] [2020-10-13 10:53:01,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:01,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:53:01,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204553141] [2020-10-13 10:53:01,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:53:01,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:01,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:53:01,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:53:01,592 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-10-13 10:53:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:01,718 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-10-13 10:53:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:53:01,719 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-13 10:53:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:01,720 INFO L225 Difference]: With dead ends: 87 [2020-10-13 10:53:01,720 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:53:01,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:53:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:53:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-13 10:53:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:53:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-13 10:53:01,724 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-13 10:53:01,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:01,724 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-13 10:53:01,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:53:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-13 10:53:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 10:53:01,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:01,725 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:01,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:53:01,726 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1697989293, now seen corresponding path program 35 times [2020-10-13 10:53:01,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:01,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135035872] [2020-10-13 10:53:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:01,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:01,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:01,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:53:01,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:01,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-13 10:53:01,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:01,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:53:01,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:01,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 10:53:01,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:02,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:02,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:02,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:02,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:02,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:02,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:02,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:02,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:02,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:02,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:02,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:53:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:02,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135035872] [2020-10-13 10:53:02,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:02,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:53:02,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204164412] [2020-10-13 10:53:02,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:53:02,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:02,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:53:02,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:53:02,820 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-10-13 10:53:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:02,980 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2020-10-13 10:53:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:53:02,980 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-13 10:53:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:02,982 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:53:02,982 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 10:53:02,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:53:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 10:53:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-13 10:53:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 10:53:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-13 10:53:02,988 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-13 10:53:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:02,988 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-13 10:53:02,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:53:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-13 10:53:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 10:53:02,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:02,990 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:02,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:53:02,991 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:02,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:02,991 INFO L82 PathProgramCache]: Analyzing trace with hash 815499115, now seen corresponding path program 36 times [2020-10-13 10:53:02,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:02,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502430941] [2020-10-13 10:53:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:03,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:03,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 10:53:03,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:03,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-13 10:53:03,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:03,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:53:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 10:53:03,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:53:04,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:04,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:04,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:04,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:04,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:04,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:04,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:04,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:04,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:04,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:04,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:04,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502430941] [2020-10-13 10:53:04,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:04,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:53:04,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299981573] [2020-10-13 10:53:04,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:53:04,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:04,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:53:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:53:04,225 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-10-13 10:53:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:04,321 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-10-13 10:53:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:53:04,325 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-13 10:53:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:04,325 INFO L225 Difference]: With dead ends: 91 [2020-10-13 10:53:04,325 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 10:53:04,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:53:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 10:53:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-13 10:53:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 10:53:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-13 10:53:04,329 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-13 10:53:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:04,330 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-13 10:53:04,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:53:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-13 10:53:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 10:53:04,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:04,331 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:04,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:53:04,331 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1149004631, now seen corresponding path program 37 times [2020-10-13 10:53:04,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:04,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903086482] [2020-10-13 10:53:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:04,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:04,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:04,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 10:53:04,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:04,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-13 10:53:04,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:04,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:53:04,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:04,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:53:04,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:05,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:05,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:05,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:05,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:05,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:05,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:05,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:05,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:05,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:05,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903086482] [2020-10-13 10:53:05,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:05,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:53:05,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140411250] [2020-10-13 10:53:05,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:53:05,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:05,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:53:05,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:53:05,337 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-10-13 10:53:05,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:05,478 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-10-13 10:53:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:53:05,478 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-13 10:53:05,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:05,479 INFO L225 Difference]: With dead ends: 93 [2020-10-13 10:53:05,479 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 10:53:05,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:53:05,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 10:53:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-13 10:53:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 10:53:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-13 10:53:05,483 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-13 10:53:05,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:05,484 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-13 10:53:05,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:53:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-13 10:53:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 10:53:05,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:05,485 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:05,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:53:05,485 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:05,485 INFO L82 PathProgramCache]: Analyzing trace with hash 748505703, now seen corresponding path program 38 times [2020-10-13 10:53:05,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:05,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719469908] [2020-10-13 10:53:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:05,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:05,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:05,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 10:53:05,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:05,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-13 10:53:05,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:53:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 10:53:05,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:06,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:06,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:06,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:06,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:06,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:06,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:06,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:06,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:06,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:06,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:06,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:06,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719469908] [2020-10-13 10:53:06,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:06,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:53:06,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221791084] [2020-10-13 10:53:06,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:53:06,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:06,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:53:06,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:53:06,580 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-10-13 10:53:06,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:06,733 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-10-13 10:53:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:53:06,734 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-13 10:53:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:06,735 INFO L225 Difference]: With dead ends: 95 [2020-10-13 10:53:06,735 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 10:53:06,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:53:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 10:53:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-13 10:53:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 10:53:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-13 10:53:06,748 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-13 10:53:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:06,748 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-13 10:53:06,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:53:06,748 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-13 10:53:06,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 10:53:06,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:06,753 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:06,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:53:06,753 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:06,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1105164123, now seen corresponding path program 39 times [2020-10-13 10:53:06,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:06,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762062577] [2020-10-13 10:53:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:06,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:07,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:07,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 10:53:07,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:07,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-13 10:53:07,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 10:53:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 10:53:07,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:07,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:07,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:07,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:07,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:07,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:07,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:07,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:07,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:07,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:07,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:07,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:07,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762062577] [2020-10-13 10:53:07,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:07,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 10:53:07,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116461604] [2020-10-13 10:53:07,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 10:53:07,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:07,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 10:53:07,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:53:07,940 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-10-13 10:53:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:08,086 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2020-10-13 10:53:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 10:53:08,087 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-13 10:53:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:08,088 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:53:08,088 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 10:53:08,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:53:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 10:53:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-13 10:53:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:53:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-13 10:53:08,093 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-10-13 10:53:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:08,094 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-13 10:53:08,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 10:53:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-13 10:53:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:53:08,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:08,095 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:08,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:53:08,095 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:08,095 INFO L82 PathProgramCache]: Analyzing trace with hash -70439069, now seen corresponding path program 40 times [2020-10-13 10:53:08,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:08,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333881331] [2020-10-13 10:53:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:08,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:08,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:08,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 10:53:08,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:08,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-13 10:53:08,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:08,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 10:53:08,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:08,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 10:53:08,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:09,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:09,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:09,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:09,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:09,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:09,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:09,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:09,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:09,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:09,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:09,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:09,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333881331] [2020-10-13 10:53:09,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:09,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 10:53:09,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871550517] [2020-10-13 10:53:09,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 10:53:09,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:09,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 10:53:09,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:53:09,227 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-10-13 10:53:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:09,379 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-10-13 10:53:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 10:53:09,380 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-13 10:53:09,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:09,380 INFO L225 Difference]: With dead ends: 99 [2020-10-13 10:53:09,380 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 10:53:09,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:53:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 10:53:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-13 10:53:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 10:53:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-13 10:53:09,387 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-10-13 10:53:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:09,388 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-13 10:53:09,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 10:53:09,388 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-13 10:53:09,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 10:53:09,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:09,389 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:09,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:53:09,389 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:09,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:09,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2132074847, now seen corresponding path program 41 times [2020-10-13 10:53:09,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:09,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414431786] [2020-10-13 10:53:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:09,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:09,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 10:53:09,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:09,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-13 10:53:09,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:09,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 10:53:09,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:09,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 10:53:09,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:10,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:10,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:10,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:10,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:10,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:10,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:10,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:10,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:10,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:10,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:10,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:10,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414431786] [2020-10-13 10:53:10,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:10,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 10:53:10,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771795991] [2020-10-13 10:53:10,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 10:53:10,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 10:53:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:53:10,569 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-10-13 10:53:10,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:10,694 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-10-13 10:53:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 10:53:10,695 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-13 10:53:10,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:10,696 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:53:10,696 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 10:53:10,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:53:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 10:53:10,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-13 10:53:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 10:53:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-13 10:53:10,701 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-10-13 10:53:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:10,702 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-13 10:53:10,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 10:53:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-13 10:53:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 10:53:10,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:10,703 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:10,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:53:10,703 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:10,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:10,704 INFO L82 PathProgramCache]: Analyzing trace with hash 910833247, now seen corresponding path program 42 times [2020-10-13 10:53:10,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:10,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508215842] [2020-10-13 10:53:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:10,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:10,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:10,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:53:10,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:10,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-13 10:53:10,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 10:53:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 10:53:10,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:11,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:11,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:11,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:11,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:11,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:11,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:11,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:11,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:11,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508215842] [2020-10-13 10:53:11,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:11,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 10:53:11,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196133692] [2020-10-13 10:53:11,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 10:53:11,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:11,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 10:53:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:53:11,932 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-10-13 10:53:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:12,077 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-10-13 10:53:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 10:53:12,078 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-13 10:53:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:12,079 INFO L225 Difference]: With dead ends: 103 [2020-10-13 10:53:12,079 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 10:53:12,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:53:12,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 10:53:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 10:53:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 10:53:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-13 10:53:12,084 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-10-13 10:53:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:12,085 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-13 10:53:12,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 10:53:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-13 10:53:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 10:53:12,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:12,086 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:12,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:53:12,086 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:12,086 INFO L82 PathProgramCache]: Analyzing trace with hash 272783005, now seen corresponding path program 43 times [2020-10-13 10:53:12,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:12,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399399885] [2020-10-13 10:53:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:12,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:12,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:12,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 10:53:12,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:12,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-13 10:53:12,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:12,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 10:53:12,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:12,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 10:53:12,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:13,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:13,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:13,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:13,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:13,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:13,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:13,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:13,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:13,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:13,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:13,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399399885] [2020-10-13 10:53:13,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:13,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 10:53:13,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438563057] [2020-10-13 10:53:13,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 10:53:13,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:13,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 10:53:13,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:53:13,344 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-10-13 10:53:13,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:13,483 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-10-13 10:53:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 10:53:13,484 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-13 10:53:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:13,485 INFO L225 Difference]: With dead ends: 105 [2020-10-13 10:53:13,485 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 10:53:13,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:53:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 10:53:13,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-13 10:53:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 10:53:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-13 10:53:13,489 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-10-13 10:53:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:13,490 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-13 10:53:13,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 10:53:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-13 10:53:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 10:53:13,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:13,491 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:13,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:53:13,491 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:13,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:13,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1286823771, now seen corresponding path program 44 times [2020-10-13 10:53:13,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:13,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325463766] [2020-10-13 10:53:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:13,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:13,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 10:53:13,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:13,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-13 10:53:13,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 10:53:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 10:53:13,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:14,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:14,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:14,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:14,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:14,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:14,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:14,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:14,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:14,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:14,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:14,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325463766] [2020-10-13 10:53:14,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:14,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 10:53:14,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120787278] [2020-10-13 10:53:14,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 10:53:14,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 10:53:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:53:14,815 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-10-13 10:53:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:14,974 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-10-13 10:53:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 10:53:14,975 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-13 10:53:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:14,976 INFO L225 Difference]: With dead ends: 107 [2020-10-13 10:53:14,976 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 10:53:14,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:53:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 10:53:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-13 10:53:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 10:53:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-13 10:53:14,982 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-10-13 10:53:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:14,983 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-13 10:53:14,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 10:53:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-13 10:53:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 10:53:14,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:14,984 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:14,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:53:14,984 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:14,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:14,985 INFO L82 PathProgramCache]: Analyzing trace with hash 822423705, now seen corresponding path program 45 times [2020-10-13 10:53:14,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:14,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881592170] [2020-10-13 10:53:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:15,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:15,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 10:53:15,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:15,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-13 10:53:15,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:15,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 10:53:15,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:15,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 10:53:15,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:16,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:16,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:16,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:16,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:16,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:16,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:16,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:16,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:16,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881592170] [2020-10-13 10:53:16,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:16,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 10:53:16,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802367853] [2020-10-13 10:53:16,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 10:53:16,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:16,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 10:53:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:53:16,422 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-10-13 10:53:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:16,567 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2020-10-13 10:53:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 10:53:16,568 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-13 10:53:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:16,568 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:53:16,568 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 10:53:16,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:53:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 10:53:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-13 10:53:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 10:53:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-13 10:53:16,572 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-10-13 10:53:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:16,572 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-13 10:53:16,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 10:53:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-13 10:53:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 10:53:16,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:16,573 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:16,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:53:16,573 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1210559063, now seen corresponding path program 46 times [2020-10-13 10:53:16,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:16,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839059620] [2020-10-13 10:53:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:16,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:16,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:16,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 10:53:16,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:16,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-13 10:53:16,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:16,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 10:53:16,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:16,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 10:53:16,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:18,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:18,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:18,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:18,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:18,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:18,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:18,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:18,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:18,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:18,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839059620] [2020-10-13 10:53:18,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:18,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 10:53:18,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918692823] [2020-10-13 10:53:18,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 10:53:18,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:18,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 10:53:18,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:53:18,016 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-10-13 10:53:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:18,171 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-10-13 10:53:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 10:53:18,172 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-13 10:53:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:18,172 INFO L225 Difference]: With dead ends: 111 [2020-10-13 10:53:18,173 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 10:53:18,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:53:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 10:53:18,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-13 10:53:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:53:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-13 10:53:18,177 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-10-13 10:53:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:18,177 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-13 10:53:18,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 10:53:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-13 10:53:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 10:53:18,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:18,178 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:18,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:53:18,178 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:18,179 INFO L82 PathProgramCache]: Analyzing trace with hash 546483349, now seen corresponding path program 47 times [2020-10-13 10:53:18,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:18,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082255759] [2020-10-13 10:53:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:18,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:18,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:18,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 10:53:18,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:18,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-13 10:53:18,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:18,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 10:53:18,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:18,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:53:18,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:19,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:19,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:19,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:19,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:19,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:19,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:19,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:19,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:19,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:19,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:19,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:19,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082255759] [2020-10-13 10:53:19,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:19,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 10:53:19,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114394068] [2020-10-13 10:53:19,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 10:53:19,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:19,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 10:53:19,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:53:19,711 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-10-13 10:53:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:19,886 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2020-10-13 10:53:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 10:53:19,887 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-13 10:53:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:19,888 INFO L225 Difference]: With dead ends: 113 [2020-10-13 10:53:19,888 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 10:53:19,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:53:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 10:53:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-13 10:53:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 10:53:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-13 10:53:19,892 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-10-13 10:53:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:19,892 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-13 10:53:19,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 10:53:19,892 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-13 10:53:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 10:53:19,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:19,893 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:19,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:53:19,893 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:19,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1975117997, now seen corresponding path program 48 times [2020-10-13 10:53:19,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:19,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956353608] [2020-10-13 10:53:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:19,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:20,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 10:53:20,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:20,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-13 10:53:20,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 10:53:20,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:20,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 10:53:20,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:21,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:21,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:21,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:21,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:21,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:21,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:21,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:21,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:21,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:21,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:21,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:21,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956353608] [2020-10-13 10:53:21,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:21,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 10:53:21,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873018512] [2020-10-13 10:53:21,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 10:53:21,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:21,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 10:53:21,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:53:21,428 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-10-13 10:53:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:21,580 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-10-13 10:53:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 10:53:21,581 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-10-13 10:53:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:21,582 INFO L225 Difference]: With dead ends: 115 [2020-10-13 10:53:21,582 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 10:53:21,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:53:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 10:53:21,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-13 10:53:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 10:53:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-13 10:53:21,587 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-13 10:53:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:21,588 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-13 10:53:21,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 10:53:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-13 10:53:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 10:53:21,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:21,589 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:21,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:53:21,589 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:21,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1422510737, now seen corresponding path program 49 times [2020-10-13 10:53:21,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:21,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905035749] [2020-10-13 10:53:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:21,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:21,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:21,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 10:53:21,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:21,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-13 10:53:21,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 10:53:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 10:53:21,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:23,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:23,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:23,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:23,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:23,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:23,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:23,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:23,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:23,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905035749] [2020-10-13 10:53:23,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:23,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 10:53:23,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509188569] [2020-10-13 10:53:23,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 10:53:23,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:23,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 10:53:23,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:53:23,271 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-10-13 10:53:23,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:23,438 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2020-10-13 10:53:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 10:53:23,438 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-13 10:53:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:23,440 INFO L225 Difference]: With dead ends: 117 [2020-10-13 10:53:23,440 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 10:53:23,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:53:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 10:53:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-13 10:53:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 10:53:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-13 10:53:23,444 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-10-13 10:53:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:23,444 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-13 10:53:23,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 10:53:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-13 10:53:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 10:53:23,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:23,445 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:23,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:53:23,445 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:23,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1926388145, now seen corresponding path program 50 times [2020-10-13 10:53:23,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:23,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274122818] [2020-10-13 10:53:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:23,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:23,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:23,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 10:53:23,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:23,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-13 10:53:23,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:23,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 10:53:23,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:23,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 10:53:23,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:25,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:25,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:25,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:25,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:25,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:25,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:25,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:25,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274122818] [2020-10-13 10:53:25,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:25,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 10:53:25,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716899495] [2020-10-13 10:53:25,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 10:53:25,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:25,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 10:53:25,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:53:25,125 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-10-13 10:53:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:25,289 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2020-10-13 10:53:25,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 10:53:25,289 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-10-13 10:53:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:25,291 INFO L225 Difference]: With dead ends: 119 [2020-10-13 10:53:25,291 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 10:53:25,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:53:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 10:53:25,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-13 10:53:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 10:53:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-13 10:53:25,295 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-10-13 10:53:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:25,295 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-13 10:53:25,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 10:53:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-13 10:53:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 10:53:25,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:25,296 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:25,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:53:25,296 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1007258253, now seen corresponding path program 51 times [2020-10-13 10:53:25,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:25,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138805589] [2020-10-13 10:53:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:25,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:25,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:25,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 10:53:25,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:25,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-13 10:53:25,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 10:53:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 10:53:25,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:27,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:27,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:27,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:27,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:27,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:27,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:27,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:27,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:27,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:27,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:27,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:27,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138805589] [2020-10-13 10:53:27,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:27,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 10:53:27,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340661363] [2020-10-13 10:53:27,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 10:53:27,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:27,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 10:53:27,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:53:27,067 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-10-13 10:53:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:27,255 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-10-13 10:53:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 10:53:27,256 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-10-13 10:53:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:27,257 INFO L225 Difference]: With dead ends: 121 [2020-10-13 10:53:27,257 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 10:53:27,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:53:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 10:53:27,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-13 10:53:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 10:53:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-10-13 10:53:27,261 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-10-13 10:53:27,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:27,261 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-10-13 10:53:27,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 10:53:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-10-13 10:53:27,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 10:53:27,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:27,262 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:27,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:53:27,263 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1552066741, now seen corresponding path program 52 times [2020-10-13 10:53:27,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:27,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283363078] [2020-10-13 10:53:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:27,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:27,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:27,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 10:53:27,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:27,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-13 10:53:27,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:27,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 10:53:27,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:27,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-13 10:53:27,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:29,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:29,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:29,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:29,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:29,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:29,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:29,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:29,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:29,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:29,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:29,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283363078] [2020-10-13 10:53:29,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:29,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 10:53:29,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601217604] [2020-10-13 10:53:29,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 10:53:29,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:29,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 10:53:29,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:53:29,136 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-10-13 10:53:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:29,322 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2020-10-13 10:53:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 10:53:29,322 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-10-13 10:53:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:29,323 INFO L225 Difference]: With dead ends: 123 [2020-10-13 10:53:29,323 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 10:53:29,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:53:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 10:53:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-13 10:53:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 10:53:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-10-13 10:53:29,328 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-10-13 10:53:29,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:29,328 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-10-13 10:53:29,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 10:53:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-10-13 10:53:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 10:53:29,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:29,329 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:29,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:53:29,330 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash -47125367, now seen corresponding path program 53 times [2020-10-13 10:53:29,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:29,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135128687] [2020-10-13 10:53:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:29,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:29,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 10:53:29,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:29,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-13 10:53:29,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:29,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 10:53:29,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:29,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 10:53:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:31,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:31,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:31,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:31,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:31,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:31,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:31,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:31,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:31,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:31,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135128687] [2020-10-13 10:53:31,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:31,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 10:53:31,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075885914] [2020-10-13 10:53:31,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 10:53:31,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 10:53:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:53:31,255 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-10-13 10:53:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:31,461 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2020-10-13 10:53:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 10:53:31,461 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-10-13 10:53:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:31,462 INFO L225 Difference]: With dead ends: 125 [2020-10-13 10:53:31,462 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 10:53:31,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:53:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 10:53:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-13 10:53:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 10:53:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-10-13 10:53:31,467 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-10-13 10:53:31,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:31,467 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-10-13 10:53:31,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 10:53:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-10-13 10:53:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 10:53:31,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:31,469 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:31,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:53:31,470 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:31,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1202443705, now seen corresponding path program 54 times [2020-10-13 10:53:31,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:31,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362496747] [2020-10-13 10:53:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:31,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:31,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:31,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 10:53:31,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:31,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-13 10:53:31,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:31,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 10:53:31,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:31,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-13 10:53:31,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:33,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:33,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:33,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:33,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:33,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:33,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:33,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:33,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:33,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:33,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:33,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362496747] [2020-10-13 10:53:33,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:33,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 10:53:33,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652903645] [2020-10-13 10:53:33,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 10:53:33,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:33,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 10:53:33,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:53:33,429 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-10-13 10:53:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:33,599 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2020-10-13 10:53:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 10:53:33,600 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-10-13 10:53:33,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:33,601 INFO L225 Difference]: With dead ends: 127 [2020-10-13 10:53:33,601 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 10:53:33,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:53:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 10:53:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-13 10:53:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 10:53:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-13 10:53:33,606 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-10-13 10:53:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:33,606 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-13 10:53:33,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 10:53:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-13 10:53:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 10:53:33,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:33,607 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:33,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:53:33,608 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:33,608 INFO L82 PathProgramCache]: Analyzing trace with hash 933163141, now seen corresponding path program 55 times [2020-10-13 10:53:33,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:33,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877738103] [2020-10-13 10:53:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:33,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:34,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:34,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 10:53:34,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:34,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-13 10:53:34,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:34,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 10:53:34,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:34,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-13 10:53:34,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:35,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:35,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:35,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:35,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:35,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:35,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:35,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:35,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877738103] [2020-10-13 10:53:35,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:35,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 10:53:35,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655413352] [2020-10-13 10:53:35,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 10:53:35,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 10:53:35,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:53:35,717 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-10-13 10:53:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:35,931 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2020-10-13 10:53:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 10:53:35,931 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-10-13 10:53:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:35,932 INFO L225 Difference]: With dead ends: 129 [2020-10-13 10:53:35,932 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 10:53:35,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:53:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 10:53:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-13 10:53:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 10:53:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-13 10:53:35,936 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-10-13 10:53:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:35,937 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-13 10:53:35,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 10:53:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-13 10:53:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 10:53:35,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:35,938 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:35,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:53:35,938 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:35,938 INFO L82 PathProgramCache]: Analyzing trace with hash 256974659, now seen corresponding path program 56 times [2020-10-13 10:53:35,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:35,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899133638] [2020-10-13 10:53:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:35,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:36,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:36,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 10:53:36,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:36,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-13 10:53:36,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:36,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 10:53:36,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:36,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 10:53:36,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:38,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:38,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:38,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:38,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:38,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:38,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:38,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:38,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:38,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899133638] [2020-10-13 10:53:38,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:38,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 10:53:38,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893929095] [2020-10-13 10:53:38,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 10:53:38,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:38,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 10:53:38,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:53:38,050 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-10-13 10:53:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:38,225 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-10-13 10:53:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 10:53:38,226 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-10-13 10:53:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:38,227 INFO L225 Difference]: With dead ends: 131 [2020-10-13 10:53:38,227 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 10:53:38,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:53:38,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 10:53:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-13 10:53:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 10:53:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-10-13 10:53:38,231 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-10-13 10:53:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:38,232 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-10-13 10:53:38,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 10:53:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-10-13 10:53:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 10:53:38,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:38,233 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:38,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:53:38,233 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1020094847, now seen corresponding path program 57 times [2020-10-13 10:53:38,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:38,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595969747] [2020-10-13 10:53:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:38,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:38,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:38,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 10:53:38,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:38,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-13 10:53:38,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 10:53:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-13 10:53:38,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:40,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:40,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:40,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:40,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:40,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:40,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:40,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:40,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595969747] [2020-10-13 10:53:40,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:40,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 10:53:40,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759239205] [2020-10-13 10:53:40,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 10:53:40,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:40,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 10:53:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:53:40,428 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-10-13 10:53:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:40,643 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2020-10-13 10:53:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 10:53:40,644 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-10-13 10:53:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:40,644 INFO L225 Difference]: With dead ends: 133 [2020-10-13 10:53:40,645 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 10:53:40,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:53:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 10:53:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-13 10:53:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 10:53:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-10-13 10:53:40,648 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-10-13 10:53:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:40,648 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-10-13 10:53:40,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 10:53:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-10-13 10:53:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 10:53:40,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:40,649 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:40,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:53:40,649 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash 76756543, now seen corresponding path program 58 times [2020-10-13 10:53:40,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:40,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177115692] [2020-10-13 10:53:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:40,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:41,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:41,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 10:53:41,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:41,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-13 10:53:41,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 10:53:41,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:41,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-13 10:53:41,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:53:42,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:42,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:42,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:42,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:42,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:42,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:42,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:42,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:42,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:42,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:43,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177115692] [2020-10-13 10:53:43,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:43,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 10:53:43,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949331991] [2020-10-13 10:53:43,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 10:53:43,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 10:53:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:53:43,002 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-10-13 10:53:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:43,184 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-10-13 10:53:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 10:53:43,185 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-10-13 10:53:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:43,186 INFO L225 Difference]: With dead ends: 135 [2020-10-13 10:53:43,186 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 10:53:43,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:53:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 10:53:43,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-13 10:53:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 10:53:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-10-13 10:53:43,190 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-10-13 10:53:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:43,190 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-10-13 10:53:43,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 10:53:43,190 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-10-13 10:53:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 10:53:43,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:43,191 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:43,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:53:43,192 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:43,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1883954813, now seen corresponding path program 59 times [2020-10-13 10:53:43,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:43,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577769967] [2020-10-13 10:53:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:43,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:43,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:43,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 10:53:43,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:43,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-13 10:53:43,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:43,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 10:53:43,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:43,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-13 10:53:43,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:45,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:45,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:45,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:45,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:45,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:45,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:45,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:45,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:45,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577769967] [2020-10-13 10:53:45,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:45,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 10:53:45,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25491413] [2020-10-13 10:53:45,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 10:53:45,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:45,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 10:53:45,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:53:45,615 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 62 states. [2020-10-13 10:53:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:45,840 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2020-10-13 10:53:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 10:53:45,840 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 128 [2020-10-13 10:53:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:45,841 INFO L225 Difference]: With dead ends: 137 [2020-10-13 10:53:45,841 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 10:53:45,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:53:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 10:53:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-13 10:53:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 10:53:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-10-13 10:53:45,846 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-10-13 10:53:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:45,847 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-10-13 10:53:45,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 10:53:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-10-13 10:53:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 10:53:45,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:45,848 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:45,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 10:53:45,848 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash -860262597, now seen corresponding path program 60 times [2020-10-13 10:53:45,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:45,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004266170] [2020-10-13 10:53:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:45,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:46,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 10:53:46,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:46,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-13 10:53:46,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:46,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 10:53:46,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:46,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-13 10:53:46,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:48,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:48,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:48,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:48,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:48,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:48,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:48,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:48,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:48,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:48,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:48,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:48,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004266170] [2020-10-13 10:53:48,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:48,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 10:53:48,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860862918] [2020-10-13 10:53:48,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 10:53:48,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:48,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 10:53:48,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:53:48,375 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 63 states. [2020-10-13 10:53:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:48,594 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2020-10-13 10:53:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 10:53:48,595 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 130 [2020-10-13 10:53:48,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:48,596 INFO L225 Difference]: With dead ends: 139 [2020-10-13 10:53:48,596 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 10:53:48,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:53:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 10:53:48,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-13 10:53:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 10:53:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-10-13 10:53:48,600 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-10-13 10:53:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:48,600 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-10-13 10:53:48,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 10:53:48,601 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-10-13 10:53:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 10:53:48,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:48,601 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:48,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 10:53:48,602 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:48,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:48,602 INFO L82 PathProgramCache]: Analyzing trace with hash -943273863, now seen corresponding path program 61 times [2020-10-13 10:53:48,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:48,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124114326] [2020-10-13 10:53:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:48,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:49,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:49,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 10:53:49,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:49,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-13 10:53:49,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:49,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 10:53:49,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:49,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-13 10:53:49,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:51,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:51,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:51,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:51,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:51,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:51,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:51,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:51,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:51,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:51,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:51,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:51,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124114326] [2020-10-13 10:53:51,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:51,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 10:53:51,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730855784] [2020-10-13 10:53:51,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 10:53:51,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:51,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 10:53:51,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:53:51,198 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 64 states. [2020-10-13 10:53:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:51,393 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-10-13 10:53:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 10:53:51,394 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 132 [2020-10-13 10:53:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:51,395 INFO L225 Difference]: With dead ends: 141 [2020-10-13 10:53:51,395 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 10:53:51,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:53:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 10:53:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-13 10:53:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 10:53:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-10-13 10:53:51,400 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-10-13 10:53:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:51,400 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-10-13 10:53:51,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 10:53:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-10-13 10:53:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 10:53:51,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:51,401 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:51,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 10:53:51,401 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash 887278135, now seen corresponding path program 62 times [2020-10-13 10:53:51,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:51,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736644968] [2020-10-13 10:53:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:51,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:51,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 10:53:51,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:51,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-13 10:53:51,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:51,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 10:53:51,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:51,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-13 10:53:51,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:54,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:54,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:54,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:54,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:54,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:54,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:54,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:54,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:54,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:54,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:54,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:54,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736644968] [2020-10-13 10:53:54,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:54,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-13 10:53:54,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980155670] [2020-10-13 10:53:54,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-13 10:53:54,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-13 10:53:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:53:54,065 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 65 states. [2020-10-13 10:53:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:54,300 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2020-10-13 10:53:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 10:53:54,301 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 134 [2020-10-13 10:53:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:54,302 INFO L225 Difference]: With dead ends: 143 [2020-10-13 10:53:54,302 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 10:53:54,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:53:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 10:53:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-13 10:53:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 10:53:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-10-13 10:53:54,306 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-10-13 10:53:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:54,306 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-10-13 10:53:54,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-13 10:53:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-10-13 10:53:54,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 10:53:54,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:54,307 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:54,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 10:53:54,308 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:54,308 INFO L82 PathProgramCache]: Analyzing trace with hash -888843147, now seen corresponding path program 63 times [2020-10-13 10:53:54,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:54,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045085234] [2020-10-13 10:53:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:54,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:54,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:54,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 10:53:54,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:54,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-13 10:53:54,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:54,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-13 10:53:54,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:54,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-13 10:53:54,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:57,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:57,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:57,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:57,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:57,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:57,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:53:57,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:57,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:57,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:57,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:57,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:53:57,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045085234] [2020-10-13 10:53:57,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:57,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 10:53:57,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263288262] [2020-10-13 10:53:57,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 10:53:57,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:57,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 10:53:57,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:53:57,063 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 66 states. [2020-10-13 10:53:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:57,303 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2020-10-13 10:53:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 10:53:57,303 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 136 [2020-10-13 10:53:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:57,304 INFO L225 Difference]: With dead ends: 145 [2020-10-13 10:53:57,305 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 10:53:57,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:53:57,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 10:53:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-13 10:53:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 10:53:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-10-13 10:53:57,309 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-10-13 10:53:57,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:57,309 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-10-13 10:53:57,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 10:53:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-10-13 10:53:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 10:53:57,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:57,310 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:57,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 10:53:57,311 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1655588659, now seen corresponding path program 64 times [2020-10-13 10:53:57,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:57,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920783832] [2020-10-13 10:53:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:57,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:57,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:57,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 10:53:57,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:57,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-13 10:53:57,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:57,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-13 10:53:57,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:57,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-13 10:53:57,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:00,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:00,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:00,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:00,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:00,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:00,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:00,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:00,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:00,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:00,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:00,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920783832] [2020-10-13 10:54:00,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:00,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 10:54:00,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961536857] [2020-10-13 10:54:00,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 10:54:00,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:00,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 10:54:00,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:54:00,143 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 67 states. [2020-10-13 10:54:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:00,409 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2020-10-13 10:54:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-13 10:54:00,409 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 138 [2020-10-13 10:54:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:00,411 INFO L225 Difference]: With dead ends: 147 [2020-10-13 10:54:00,411 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 10:54:00,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:54:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 10:54:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-13 10:54:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 10:54:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-10-13 10:54:00,418 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-10-13 10:54:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:00,419 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-10-13 10:54:00,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-13 10:54:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-10-13 10:54:00,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 10:54:00,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:00,421 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:00,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 10:54:00,421 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1276804495, now seen corresponding path program 65 times [2020-10-13 10:54:00,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:00,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584203714] [2020-10-13 10:54:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:00,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:01,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:01,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 10:54:01,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:01,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-13 10:54:01,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-13 10:54:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-13 10:54:01,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:03,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:03,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:03,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:03,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:03,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:03,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:03,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:03,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:03,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:03,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:03,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:03,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584203714] [2020-10-13 10:54:03,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:03,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-13 10:54:03,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192261925] [2020-10-13 10:54:03,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-13 10:54:03,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-13 10:54:03,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 10:54:03,556 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 68 states. [2020-10-13 10:54:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:03,830 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2020-10-13 10:54:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 10:54:03,830 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 140 [2020-10-13 10:54:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:03,831 INFO L225 Difference]: With dead ends: 149 [2020-10-13 10:54:03,831 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 10:54:03,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 10:54:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 10:54:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-13 10:54:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 10:54:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-10-13 10:54:03,837 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-10-13 10:54:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:03,838 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-10-13 10:54:03,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-13 10:54:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-10-13 10:54:03,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 10:54:03,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:03,839 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:03,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-13 10:54:03,839 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1808079313, now seen corresponding path program 66 times [2020-10-13 10:54:03,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:03,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892349949] [2020-10-13 10:54:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:03,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:04,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:04,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 10:54:04,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:04,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-13 10:54:04,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:04,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-13 10:54:04,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:04,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-13 10:54:04,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:06,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:06,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:06,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:06,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:06,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:06,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:06,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:06,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:06,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:06,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:06,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:06,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892349949] [2020-10-13 10:54:06,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:06,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-13 10:54:06,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126313866] [2020-10-13 10:54:06,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-13 10:54:06,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:06,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-13 10:54:06,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 10:54:06,907 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 69 states. [2020-10-13 10:54:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:07,179 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-10-13 10:54:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-13 10:54:07,179 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 142 [2020-10-13 10:54:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:07,180 INFO L225 Difference]: With dead ends: 151 [2020-10-13 10:54:07,180 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 10:54:07,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 10:54:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 10:54:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-13 10:54:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 10:54:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-10-13 10:54:07,185 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-10-13 10:54:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:07,186 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-10-13 10:54:07,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-13 10:54:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-10-13 10:54:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 10:54:07,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:07,187 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:07,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-13 10:54:07,187 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1262071187, now seen corresponding path program 67 times [2020-10-13 10:54:07,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:07,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215635519] [2020-10-13 10:54:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:07,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:07,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:07,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 10:54:07,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:07,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-13 10:54:07,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:07,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-13 10:54:07,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:07,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-13 10:54:07,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:10,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:10,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:10,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:10,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:10,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:10,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:10,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:10,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:10,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:10,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215635519] [2020-10-13 10:54:10,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:10,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-13 10:54:10,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073582490] [2020-10-13 10:54:10,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-13 10:54:10,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:10,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-13 10:54:10,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 10:54:10,280 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 70 states. [2020-10-13 10:54:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:10,543 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2020-10-13 10:54:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-13 10:54:10,546 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 144 [2020-10-13 10:54:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:10,547 INFO L225 Difference]: With dead ends: 153 [2020-10-13 10:54:10,547 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 10:54:10,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 10:54:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 10:54:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-13 10:54:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 10:54:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-10-13 10:54:10,552 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-10-13 10:54:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:10,552 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-10-13 10:54:10,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-13 10:54:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-10-13 10:54:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 10:54:10,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:10,553 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:10,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-13 10:54:10,554 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:10,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:10,554 INFO L82 PathProgramCache]: Analyzing trace with hash -534272213, now seen corresponding path program 68 times [2020-10-13 10:54:10,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:10,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148529134] [2020-10-13 10:54:10,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:10,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:11,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 10:54:11,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:11,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-13 10:54:11,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:11,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-13 10:54:11,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:11,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-13 10:54:11,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:14,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:14,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:14,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:14,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:14,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:14,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:14,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:14,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148529134] [2020-10-13 10:54:14,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:14,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-13 10:54:14,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668591153] [2020-10-13 10:54:14,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-13 10:54:14,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-13 10:54:14,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 10:54:14,199 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 71 states. [2020-10-13 10:54:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:14,453 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2020-10-13 10:54:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-13 10:54:14,453 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 146 [2020-10-13 10:54:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:14,454 INFO L225 Difference]: With dead ends: 155 [2020-10-13 10:54:14,455 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:54:14,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 10:54:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:54:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-13 10:54:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 10:54:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-10-13 10:54:14,460 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-10-13 10:54:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:14,460 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-10-13 10:54:14,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-13 10:54:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-10-13 10:54:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 10:54:14,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:14,462 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:14,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-13 10:54:14,462 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1199127447, now seen corresponding path program 69 times [2020-10-13 10:54:14,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:14,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060583491] [2020-10-13 10:54:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:14,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:15,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:15,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 10:54:15,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:15,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-13 10:54:15,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:15,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-13 10:54:15,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:15,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-13 10:54:15,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:17,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:17,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:17,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:17,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:17,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:17,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:17,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:17,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:17,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:17,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:17,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:17,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060583491] [2020-10-13 10:54:17,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:17,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-13 10:54:17,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345971958] [2020-10-13 10:54:17,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-13 10:54:17,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:17,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-13 10:54:17,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 10:54:17,928 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 72 states. [2020-10-13 10:54:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:18,199 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2020-10-13 10:54:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-13 10:54:18,199 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 148 [2020-10-13 10:54:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:18,200 INFO L225 Difference]: With dead ends: 157 [2020-10-13 10:54:18,200 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 10:54:18,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 10:54:18,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 10:54:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-13 10:54:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 10:54:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-10-13 10:54:18,204 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-10-13 10:54:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:18,204 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-10-13 10:54:18,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-13 10:54:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-10-13 10:54:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 10:54:18,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:18,205 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:18,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-13 10:54:18,206 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash -174880217, now seen corresponding path program 70 times [2020-10-13 10:54:18,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:18,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921521143] [2020-10-13 10:54:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:18,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:18,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:18,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 10:54:18,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:18,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-13 10:54:18,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-13 10:54:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:18,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-13 10:54:18,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:21,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:21,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:21,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:21,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:21,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:21,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:21,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:21,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:21,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:21,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:21,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:21,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921521143] [2020-10-13 10:54:21,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:21,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-13 10:54:21,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579780431] [2020-10-13 10:54:21,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-13 10:54:21,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:21,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-13 10:54:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 10:54:21,734 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 73 states. [2020-10-13 10:54:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:22,030 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2020-10-13 10:54:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-13 10:54:22,031 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 150 [2020-10-13 10:54:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:22,033 INFO L225 Difference]: With dead ends: 159 [2020-10-13 10:54:22,033 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 10:54:22,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 10:54:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 10:54:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-13 10:54:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 10:54:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-10-13 10:54:22,040 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-10-13 10:54:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:22,040 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-10-13 10:54:22,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-13 10:54:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-10-13 10:54:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 10:54:22,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:22,042 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:22,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-13 10:54:22,043 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:22,043 INFO L82 PathProgramCache]: Analyzing trace with hash 579197029, now seen corresponding path program 71 times [2020-10-13 10:54:22,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:22,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609487304] [2020-10-13 10:54:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:22,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:23,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:23,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 10:54:23,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:23,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1555 [2020-10-13 10:54:23,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:23,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-13 10:54:23,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:23,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-13 10:54:23,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:26,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:26,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:26,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:26,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:26,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:26,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:26,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:26,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:26,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:26,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:26,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:26,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609487304] [2020-10-13 10:54:26,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:26,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-13 10:54:26,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861379512] [2020-10-13 10:54:26,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-13 10:54:26,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:26,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-13 10:54:26,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 10:54:26,469 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 74 states. [2020-10-13 10:54:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:26,713 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-10-13 10:54:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-13 10:54:26,713 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 152 [2020-10-13 10:54:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:26,714 INFO L225 Difference]: With dead ends: 161 [2020-10-13 10:54:26,714 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 10:54:26,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 10:54:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 10:54:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-13 10:54:26,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 10:54:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-10-13 10:54:26,718 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-10-13 10:54:26,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:26,719 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-10-13 10:54:26,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-13 10:54:26,719 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-10-13 10:54:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-13 10:54:26,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:26,720 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:26,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-13 10:54:26,720 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash -602042589, now seen corresponding path program 72 times [2020-10-13 10:54:26,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:26,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93932981] [2020-10-13 10:54:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:26,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:27,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:27,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-13 10:54:27,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:27,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-13 10:54:27,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:27,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-13 10:54:27,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:27,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-13 10:54:27,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:30,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:30,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:30,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:30,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:30,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:30,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:30,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:30,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:30,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:30,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:30,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:30,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93932981] [2020-10-13 10:54:30,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:30,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-13 10:54:30,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393662501] [2020-10-13 10:54:30,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-13 10:54:30,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:30,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-13 10:54:30,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 10:54:30,450 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 75 states. [2020-10-13 10:54:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:30,728 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-10-13 10:54:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-13 10:54:30,728 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 154 [2020-10-13 10:54:30,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:30,729 INFO L225 Difference]: With dead ends: 163 [2020-10-13 10:54:30,729 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 10:54:30,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 10:54:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 10:54:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-13 10:54:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 10:54:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-10-13 10:54:30,733 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-10-13 10:54:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:30,734 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-10-13 10:54:30,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-13 10:54:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-10-13 10:54:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 10:54:30,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:30,735 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:30,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-13 10:54:30,735 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:30,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1901949343, now seen corresponding path program 73 times [2020-10-13 10:54:30,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:30,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399220334] [2020-10-13 10:54:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:30,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:31,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:31,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 10:54:31,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:31,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-10-13 10:54:31,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:31,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-13 10:54:31,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:31,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-13 10:54:31,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:34,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:34,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:34,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:34,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:34,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:34,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:34,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:34,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:34,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:34,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:34,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:34,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399220334] [2020-10-13 10:54:34,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:34,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-13 10:54:34,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084143062] [2020-10-13 10:54:34,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-13 10:54:34,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:34,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-13 10:54:34,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-13 10:54:34,575 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 76 states. [2020-10-13 10:54:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:34,870 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2020-10-13 10:54:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-13 10:54:34,870 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 156 [2020-10-13 10:54:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:34,871 INFO L225 Difference]: With dead ends: 165 [2020-10-13 10:54:34,871 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 10:54:34,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-13 10:54:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 10:54:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-13 10:54:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-13 10:54:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-10-13 10:54:34,875 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-10-13 10:54:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:34,875 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-10-13 10:54:34,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-13 10:54:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-10-13 10:54:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-13 10:54:34,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:34,876 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:34,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-13 10:54:34,876 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1276856801, now seen corresponding path program 74 times [2020-10-13 10:54:34,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:34,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954124866] [2020-10-13 10:54:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:34,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:35,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:35,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 10:54:35,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:35,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-13 10:54:35,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-13 10:54:35,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:35,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-13 10:54:35,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:38,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:38,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:38,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:38,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:38,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:38,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:38,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:38,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:38,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:38,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:38,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:38,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954124866] [2020-10-13 10:54:38,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:38,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-13 10:54:38,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25342533] [2020-10-13 10:54:38,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-13 10:54:38,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-13 10:54:38,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 10:54:38,815 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 77 states. [2020-10-13 10:54:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:39,109 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2020-10-13 10:54:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-13 10:54:39,110 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 158 [2020-10-13 10:54:39,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:39,111 INFO L225 Difference]: With dead ends: 167 [2020-10-13 10:54:39,111 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 10:54:39,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-13 10:54:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 10:54:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-13 10:54:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 10:54:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-10-13 10:54:39,114 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-10-13 10:54:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:39,115 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-10-13 10:54:39,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-13 10:54:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-10-13 10:54:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-13 10:54:39,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:39,115 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:39,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-13 10:54:39,116 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:39,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:39,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1858345379, now seen corresponding path program 75 times [2020-10-13 10:54:39,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:39,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977320916] [2020-10-13 10:54:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:39,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:39,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:39,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-13 10:54:39,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:39,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 824 [2020-10-13 10:54:39,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:39,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-13 10:54:39,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:39,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-13 10:54:39,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:43,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:43,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:43,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:43,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:43,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:43,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:43,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:43,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:43,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977320916] [2020-10-13 10:54:43,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:43,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-13 10:54:43,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788835788] [2020-10-13 10:54:43,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-13 10:54:43,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:43,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-13 10:54:43,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-13 10:54:43,241 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 78 states. [2020-10-13 10:54:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:43,556 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2020-10-13 10:54:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-13 10:54:43,556 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 160 [2020-10-13 10:54:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:43,557 INFO L225 Difference]: With dead ends: 169 [2020-10-13 10:54:43,557 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 10:54:43,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-13 10:54:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 10:54:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-10-13 10:54:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-13 10:54:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-10-13 10:54:43,561 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-10-13 10:54:43,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:43,561 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-10-13 10:54:43,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-13 10:54:43,562 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-10-13 10:54:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 10:54:43,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:43,563 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:43,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-13 10:54:43,563 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:43,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:43,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1971846939, now seen corresponding path program 76 times [2020-10-13 10:54:43,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:43,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137382813] [2020-10-13 10:54:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:43,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:44,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:44,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 10:54:44,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:44,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-13 10:54:44,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:44,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-13 10:54:44,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-13 10:54:44,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:47,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:47,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:47,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:47,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:47,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:47,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:47,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:47,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:47,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:47,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:47,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:47,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137382813] [2020-10-13 10:54:47,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:47,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-13 10:54:47,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005033230] [2020-10-13 10:54:47,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-13 10:54:47,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-13 10:54:47,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 10:54:47,791 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 79 states. [2020-10-13 10:54:48,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:48,084 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-10-13 10:54:48,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-13 10:54:48,085 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 162 [2020-10-13 10:54:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:48,086 INFO L225 Difference]: With dead ends: 171 [2020-10-13 10:54:48,086 INFO L226 Difference]: Without dead ends: 166 [2020-10-13 10:54:48,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 10:54:48,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-13 10:54:48,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-13 10:54:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-13 10:54:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2020-10-13 10:54:48,090 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2020-10-13 10:54:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:48,090 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2020-10-13 10:54:48,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-13 10:54:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2020-10-13 10:54:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 10:54:48,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:48,091 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:48,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-13 10:54:48,091 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:48,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:48,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1999691865, now seen corresponding path program 77 times [2020-10-13 10:54:48,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:48,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357316255] [2020-10-13 10:54:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:48,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:48,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 10:54:48,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:48,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-13 10:54:48,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-13 10:54:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-13 10:54:48,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:52,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:52,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:52,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:52,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:52,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:52,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:52,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:52,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:52,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:52,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:52,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357316255] [2020-10-13 10:54:52,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:52,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-13 10:54:52,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085878340] [2020-10-13 10:54:52,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-13 10:54:52,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:52,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-13 10:54:52,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-13 10:54:52,396 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 80 states. [2020-10-13 10:54:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:52,681 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2020-10-13 10:54:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-13 10:54:52,682 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 164 [2020-10-13 10:54:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:52,683 INFO L225 Difference]: With dead ends: 173 [2020-10-13 10:54:52,683 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 10:54:52,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-13 10:54:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 10:54:52,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-10-13 10:54:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 10:54:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-10-13 10:54:52,687 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2020-10-13 10:54:52,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:52,688 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-10-13 10:54:52,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-13 10:54:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-10-13 10:54:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 10:54:52,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:52,689 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:52,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-13 10:54:52,689 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:52,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:52,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1306105321, now seen corresponding path program 78 times [2020-10-13 10:54:52,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:52,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326008974] [2020-10-13 10:54:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:52,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:53,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 10:54:53,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:53,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-13 10:54:53,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:53,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 80 [2020-10-13 10:54:53,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:53,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-13 10:54:53,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:57,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:57,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:57,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:57,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:57,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:57,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:57,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:57,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:57,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:57,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:54:57,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326008974] [2020-10-13 10:54:57,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:57,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-13 10:54:57,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968499262] [2020-10-13 10:54:57,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-13 10:54:57,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-13 10:54:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-13 10:54:57,231 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 81 states. [2020-10-13 10:54:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:57,565 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2020-10-13 10:54:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-13 10:54:57,565 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 166 [2020-10-13 10:54:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:57,566 INFO L225 Difference]: With dead ends: 175 [2020-10-13 10:54:57,566 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 10:54:57,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-13 10:54:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 10:54:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-13 10:54:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 10:54:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2020-10-13 10:54:57,571 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2020-10-13 10:54:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:57,571 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2020-10-13 10:54:57,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-13 10:54:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2020-10-13 10:54:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 10:54:57,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:57,572 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:57,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-13 10:54:57,573 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash 98597973, now seen corresponding path program 79 times [2020-10-13 10:54:57,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:57,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878841396] [2020-10-13 10:54:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:57,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:58,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:58,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 10:54:58,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:58,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-13 10:54:58,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:58,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 81 [2020-10-13 10:54:58,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:58,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-13 10:54:58,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:02,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:02,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:02,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:02,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:02,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:02,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:02,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:02,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:02,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:02,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:02,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:02,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878841396] [2020-10-13 10:55:02,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:02,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-13 10:55:02,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043972290] [2020-10-13 10:55:02,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-13 10:55:02,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:02,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-13 10:55:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 10:55:02,175 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 82 states. [2020-10-13 10:55:02,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:02,482 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2020-10-13 10:55:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-13 10:55:02,483 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 168 [2020-10-13 10:55:02,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:02,484 INFO L225 Difference]: With dead ends: 177 [2020-10-13 10:55:02,484 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 10:55:02,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 10:55:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 10:55:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-10-13 10:55:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-13 10:55:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-10-13 10:55:02,488 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2020-10-13 10:55:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:02,489 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-10-13 10:55:02,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-13 10:55:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-10-13 10:55:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 10:55:02,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:02,490 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:02,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-13 10:55:02,490 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:02,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:02,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1398732563, now seen corresponding path program 80 times [2020-10-13 10:55:02,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:02,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123981532] [2020-10-13 10:55:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:03,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:03,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-13 10:55:03,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:03,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 932 [2020-10-13 10:55:03,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:03,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 82 [2020-10-13 10:55:03,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:03,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-13 10:55:03,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:07,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:07,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:07,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:07,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:07,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:07,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:07,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:07,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:07,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:07,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:07,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:07,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123981532] [2020-10-13 10:55:07,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:07,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-13 10:55:07,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754562085] [2020-10-13 10:55:07,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-13 10:55:07,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-13 10:55:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-13 10:55:07,224 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 83 states. [2020-10-13 10:55:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:07,533 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2020-10-13 10:55:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-13 10:55:07,534 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 170 [2020-10-13 10:55:07,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:07,535 INFO L225 Difference]: With dead ends: 179 [2020-10-13 10:55:07,535 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 10:55:07,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-13 10:55:07,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 10:55:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-10-13 10:55:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 10:55:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-10-13 10:55:07,540 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2020-10-13 10:55:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:07,540 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-10-13 10:55:07,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-13 10:55:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-10-13 10:55:07,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 10:55:07,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:07,541 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:07,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-13 10:55:07,542 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:07,542 INFO L82 PathProgramCache]: Analyzing trace with hash 992590417, now seen corresponding path program 81 times [2020-10-13 10:55:07,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:07,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468940300] [2020-10-13 10:55:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:07,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:08,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:08,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 10:55:08,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:08,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-13 10:55:08,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 83 [2020-10-13 10:55:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-13 10:55:08,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:12,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:12,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:12,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:12,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:12,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:12,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:12,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:12,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:12,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:12,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:12,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:12,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468940300] [2020-10-13 10:55:12,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:12,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-13 10:55:12,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681766097] [2020-10-13 10:55:12,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-13 10:55:12,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:12,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-13 10:55:12,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-13 10:55:12,431 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 84 states. [2020-10-13 10:55:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:12,785 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2020-10-13 10:55:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-13 10:55:12,785 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 172 [2020-10-13 10:55:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:12,786 INFO L225 Difference]: With dead ends: 181 [2020-10-13 10:55:12,786 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 10:55:12,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-13 10:55:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 10:55:12,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-10-13 10:55:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-13 10:55:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2020-10-13 10:55:12,791 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2020-10-13 10:55:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:12,792 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2020-10-13 10:55:12,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-13 10:55:12,792 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2020-10-13 10:55:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-13 10:55:12,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:12,793 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:12,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-13 10:55:12,793 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:12,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1532012047, now seen corresponding path program 82 times [2020-10-13 10:55:12,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:12,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873876081] [2020-10-13 10:55:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:12,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:13,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:13,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-13 10:55:13,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:13,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 995 [2020-10-13 10:55:13,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:13,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-13 10:55:13,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:13,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-13 10:55:13,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:17,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:17,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:17,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:17,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:17,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:17,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:17,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:17,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:17,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873876081] [2020-10-13 10:55:17,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:17,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-13 10:55:17,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511117699] [2020-10-13 10:55:17,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-13 10:55:17,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:17,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-13 10:55:17,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-13 10:55:17,820 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 85 states. [2020-10-13 10:55:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:18,197 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2020-10-13 10:55:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-13 10:55:18,198 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 174 [2020-10-13 10:55:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:18,199 INFO L225 Difference]: With dead ends: 183 [2020-10-13 10:55:18,199 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 10:55:18,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-13 10:55:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 10:55:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-10-13 10:55:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 10:55:18,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-10-13 10:55:18,204 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2020-10-13 10:55:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:18,204 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-10-13 10:55:18,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-13 10:55:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-10-13 10:55:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-13 10:55:18,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:18,205 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:18,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-13 10:55:18,206 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash 225155661, now seen corresponding path program 83 times [2020-10-13 10:55:18,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:18,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486714045] [2020-10-13 10:55:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:18,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:19,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:19,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 10:55:19,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:19,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-13 10:55:19,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:19,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 85 [2020-10-13 10:55:19,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:19,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-13 10:55:19,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:23,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:23,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:23,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:23,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:23,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:23,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:23,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:23,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:23,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:23,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:23,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:23,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486714045] [2020-10-13 10:55:23,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:23,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-13 10:55:23,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496322161] [2020-10-13 10:55:23,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-13 10:55:23,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:23,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-13 10:55:23,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-13 10:55:23,407 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 86 states. [2020-10-13 10:55:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:23,779 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2020-10-13 10:55:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-13 10:55:23,780 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 176 [2020-10-13 10:55:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:23,781 INFO L225 Difference]: With dead ends: 185 [2020-10-13 10:55:23,781 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 10:55:23,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-13 10:55:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 10:55:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-10-13 10:55:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-13 10:55:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-10-13 10:55:23,785 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2020-10-13 10:55:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:23,785 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-10-13 10:55:23,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-13 10:55:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-10-13 10:55:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 10:55:23,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:23,787 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:23,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-13 10:55:23,787 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:23,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1533380853, now seen corresponding path program 84 times [2020-10-13 10:55:23,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:23,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45427079] [2020-10-13 10:55:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:23,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:25,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:25,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 10:55:25,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:25,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1228 [2020-10-13 10:55:25,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:25,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-13 10:55:25,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:25,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-13 10:55:25,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:29,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:29,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:29,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:29,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:29,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:29,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:29,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:29,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:29,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:29,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:29,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45427079] [2020-10-13 10:55:29,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:29,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-10-13 10:55:29,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461778771] [2020-10-13 10:55:29,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-13 10:55:29,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-13 10:55:29,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-13 10:55:29,344 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 87 states. [2020-10-13 10:55:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:29,731 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2020-10-13 10:55:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-13 10:55:29,732 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 178 [2020-10-13 10:55:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:29,733 INFO L225 Difference]: With dead ends: 187 [2020-10-13 10:55:29,733 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 10:55:29,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-13 10:55:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 10:55:29,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-10-13 10:55:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-13 10:55:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-10-13 10:55:29,738 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2020-10-13 10:55:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:29,738 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-10-13 10:55:29,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-13 10:55:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-10-13 10:55:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 10:55:29,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:29,740 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:29,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-13 10:55:29,740 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:29,740 INFO L82 PathProgramCache]: Analyzing trace with hash 730143817, now seen corresponding path program 85 times [2020-10-13 10:55:29,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:29,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649409546] [2020-10-13 10:55:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:29,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:30,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:30,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-13 10:55:30,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-10-13 10:55:30,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 87 [2020-10-13 10:55:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-13 10:55:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:35,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:35,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:35,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:35,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:35,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:35,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:35,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:35,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:35,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:35,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:35,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:35,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649409546] [2020-10-13 10:55:35,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:35,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-13 10:55:35,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349188404] [2020-10-13 10:55:35,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-13 10:55:35,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:35,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-13 10:55:35,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-13 10:55:35,190 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 88 states. [2020-10-13 10:55:35,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:35,591 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2020-10-13 10:55:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-13 10:55:35,592 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 180 [2020-10-13 10:55:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:35,593 INFO L225 Difference]: With dead ends: 189 [2020-10-13 10:55:35,593 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 10:55:35,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-13 10:55:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 10:55:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-10-13 10:55:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-13 10:55:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-10-13 10:55:35,597 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2020-10-13 10:55:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:35,598 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-10-13 10:55:35,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-13 10:55:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-10-13 10:55:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 10:55:35,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:35,599 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:35,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-13 10:55:35,599 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:35,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1571067385, now seen corresponding path program 86 times [2020-10-13 10:55:35,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:35,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557820986] [2020-10-13 10:55:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:35,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:36,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:36,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 10:55:36,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:36,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-13 10:55:36,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:36,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-13 10:55:36,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:36,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-13 10:55:36,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:41,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:41,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:41,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:41,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:41,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:41,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:41,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:41,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:41,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:41,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:41,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557820986] [2020-10-13 10:55:41,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:41,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-10-13 10:55:41,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456159716] [2020-10-13 10:55:41,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-13 10:55:41,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:41,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-13 10:55:41,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-13 10:55:41,250 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 89 states. [2020-10-13 10:55:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:41,651 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-10-13 10:55:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-13 10:55:41,651 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 182 [2020-10-13 10:55:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:41,652 INFO L225 Difference]: With dead ends: 191 [2020-10-13 10:55:41,652 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 10:55:41,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-13 10:55:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 10:55:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-10-13 10:55:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-13 10:55:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2020-10-13 10:55:41,657 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2020-10-13 10:55:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:41,657 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2020-10-13 10:55:41,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-13 10:55:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2020-10-13 10:55:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-13 10:55:41,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:41,658 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:41,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-13 10:55:41,659 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:41,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1126875067, now seen corresponding path program 87 times [2020-10-13 10:55:41,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:41,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581572453] [2020-10-13 10:55:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:41,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:42,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:42,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-13 10:55:42,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:42,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1141 [2020-10-13 10:55:42,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:42,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 89 [2020-10-13 10:55:42,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:42,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-13 10:55:42,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:47,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:47,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:47,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:47,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:47,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:47,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:47,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:47,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:47,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:47,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:47,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581572453] [2020-10-13 10:55:47,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:47,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-10-13 10:55:47,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753667327] [2020-10-13 10:55:47,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-13 10:55:47,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:47,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-13 10:55:47,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-13 10:55:47,445 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 90 states. [2020-10-13 10:55:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:47,850 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2020-10-13 10:55:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-13 10:55:47,851 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 184 [2020-10-13 10:55:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:47,852 INFO L225 Difference]: With dead ends: 193 [2020-10-13 10:55:47,852 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 10:55:47,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-13 10:55:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 10:55:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-10-13 10:55:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 10:55:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-10-13 10:55:47,856 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2020-10-13 10:55:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:47,856 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-10-13 10:55:47,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-13 10:55:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-10-13 10:55:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 10:55:47,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:47,857 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:47,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-13 10:55:47,858 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash 540180227, now seen corresponding path program 88 times [2020-10-13 10:55:47,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:47,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391705889] [2020-10-13 10:55:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:47,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:49,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-13 10:55:49,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:49,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-13 10:55:49,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:49,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 90 [2020-10-13 10:55:49,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:49,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-13 10:55:49,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:53,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:53,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:53,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:53,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:53,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:53,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:53,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:53,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:53,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:53,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:53,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:53,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391705889] [2020-10-13 10:55:53,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:53,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-10-13 10:55:53,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227830245] [2020-10-13 10:55:53,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-10-13 10:55:53,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-10-13 10:55:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-10-13 10:55:53,787 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 91 states. [2020-10-13 10:55:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:54,135 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2020-10-13 10:55:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-13 10:55:54,136 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 186 [2020-10-13 10:55:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:54,137 INFO L225 Difference]: With dead ends: 195 [2020-10-13 10:55:54,137 INFO L226 Difference]: Without dead ends: 190 [2020-10-13 10:55:54,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-10-13 10:55:54,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-13 10:55:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-10-13 10:55:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-13 10:55:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2020-10-13 10:55:54,140 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2020-10-13 10:55:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:54,140 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2020-10-13 10:55:54,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-10-13 10:55:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2020-10-13 10:55:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-13 10:55:54,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:54,142 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:54,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-13 10:55:54,142 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:54,142 INFO L82 PathProgramCache]: Analyzing trace with hash 557516353, now seen corresponding path program 89 times [2020-10-13 10:55:54,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:54,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397001323] [2020-10-13 10:55:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:54,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:55,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:55,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-13 10:55:55,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:55,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1213 [2020-10-13 10:55:55,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 91 [2020-10-13 10:55:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:55,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-13 10:55:55,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:00,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:00,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:00,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:00,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:00,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:00,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:00,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:00,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:00,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:00,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:00,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:00,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397001323] [2020-10-13 10:56:00,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:00,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-10-13 10:56:00,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054663813] [2020-10-13 10:56:00,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-13 10:56:00,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-13 10:56:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-10-13 10:56:00,272 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 92 states. [2020-10-13 10:56:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:00,697 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2020-10-13 10:56:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-13 10:56:00,698 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 188 [2020-10-13 10:56:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:00,699 INFO L225 Difference]: With dead ends: 197 [2020-10-13 10:56:00,699 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 10:56:00,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-10-13 10:56:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 10:56:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2020-10-13 10:56:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-13 10:56:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2020-10-13 10:56:00,703 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2020-10-13 10:56:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:00,704 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2020-10-13 10:56:00,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-13 10:56:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2020-10-13 10:56:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-13 10:56:00,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:00,705 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:00,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-10-13 10:56:00,705 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash 37664255, now seen corresponding path program 90 times [2020-10-13 10:56:00,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:00,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575869761] [2020-10-13 10:56:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:00,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:01,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:01,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-13 10:56:01,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:01,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-13 10:56:01,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:01,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 92 [2020-10-13 10:56:01,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:01,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-13 10:56:01,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:06,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:06,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:06,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:06,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:06,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:06,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:07,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575869761] [2020-10-13 10:56:07,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:07,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-10-13 10:56:07,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092440137] [2020-10-13 10:56:07,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-10-13 10:56:07,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:07,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-10-13 10:56:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-10-13 10:56:07,018 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 93 states. [2020-10-13 10:56:07,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:07,456 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2020-10-13 10:56:07,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-13 10:56:07,457 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 190 [2020-10-13 10:56:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:07,458 INFO L225 Difference]: With dead ends: 199 [2020-10-13 10:56:07,458 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 10:56:07,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-10-13 10:56:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 10:56:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-10-13 10:56:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-13 10:56:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2020-10-13 10:56:07,463 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2020-10-13 10:56:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:07,463 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2020-10-13 10:56:07,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-10-13 10:56:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2020-10-13 10:56:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-13 10:56:07,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:07,465 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:07,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-10-13 10:56:07,465 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1323995587, now seen corresponding path program 91 times [2020-10-13 10:56:07,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:07,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547938183] [2020-10-13 10:56:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:07,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:08,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:08,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-13 10:56:08,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:08,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1277 [2020-10-13 10:56:08,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:08,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 93 [2020-10-13 10:56:08,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:08,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-13 10:56:08,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:13,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:13,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:13,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:13,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:13,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:13,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:13,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:13,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:13,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:13,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:13,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:13,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547938183] [2020-10-13 10:56:13,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:13,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-10-13 10:56:13,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977152501] [2020-10-13 10:56:13,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-10-13 10:56:13,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:13,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-10-13 10:56:13,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-10-13 10:56:13,949 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 94 states. [2020-10-13 10:56:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:14,328 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2020-10-13 10:56:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-13 10:56:14,329 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 192 [2020-10-13 10:56:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:14,330 INFO L225 Difference]: With dead ends: 201 [2020-10-13 10:56:14,330 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 10:56:14,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-10-13 10:56:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 10:56:14,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-10-13 10:56:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-13 10:56:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2020-10-13 10:56:14,334 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2020-10-13 10:56:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:14,334 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2020-10-13 10:56:14,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-10-13 10:56:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2020-10-13 10:56:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-13 10:56:14,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:14,335 INFO L422 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:14,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-10-13 10:56:14,335 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash 85921531, now seen corresponding path program 92 times [2020-10-13 10:56:14,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:14,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788397915] [2020-10-13 10:56:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:14,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:15,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:15,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-13 10:56:15,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:15,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1328 [2020-10-13 10:56:15,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:15,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 94 [2020-10-13 10:56:15,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:15,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-13 10:56:15,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:20,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:20,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:20,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:20,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:20,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:20,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:20,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:20,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:20,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:20,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:20,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:20,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788397915] [2020-10-13 10:56:20,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:20,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-10-13 10:56:20,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399629775] [2020-10-13 10:56:20,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-10-13 10:56:20,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-10-13 10:56:20,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-10-13 10:56:20,983 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 95 states. [2020-10-13 10:56:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:21,387 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2020-10-13 10:56:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-10-13 10:56:21,387 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 194 [2020-10-13 10:56:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:21,388 INFO L225 Difference]: With dead ends: 203 [2020-10-13 10:56:21,388 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 10:56:21,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2020-10-13 10:56:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 10:56:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2020-10-13 10:56:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 10:56:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-10-13 10:56:21,392 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2020-10-13 10:56:21,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:21,392 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-10-13 10:56:21,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-10-13 10:56:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-10-13 10:56:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-13 10:56:21,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:21,393 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:21,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-10-13 10:56:21,394 INFO L427 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:21,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:21,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2101573689, now seen corresponding path program 93 times [2020-10-13 10:56:21,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:21,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291547042] [2020-10-13 10:56:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:21,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:22,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-13 10:56:22,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:22,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-13 10:56:22,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 95 [2020-10-13 10:56:22,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:22,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-13 10:56:22,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:28,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:28,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:28,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:28,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:28,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:28,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:28,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291547042] [2020-10-13 10:56:28,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:28,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-10-13 10:56:28,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799085361] [2020-10-13 10:56:28,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-10-13 10:56:28,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:28,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-10-13 10:56:28,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-10-13 10:56:28,139 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 96 states. [2020-10-13 10:56:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:28,627 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2020-10-13 10:56:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-13 10:56:28,627 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 196 [2020-10-13 10:56:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:28,628 INFO L225 Difference]: With dead ends: 205 [2020-10-13 10:56:28,628 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 10:56:28,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-10-13 10:56:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 10:56:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-10-13 10:56:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-13 10:56:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2020-10-13 10:56:28,632 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2020-10-13 10:56:28,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:28,632 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2020-10-13 10:56:28,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-10-13 10:56:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2020-10-13 10:56:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-13 10:56:28,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:28,633 INFO L422 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:28,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-10-13 10:56:28,633 INFO L427 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:28,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:28,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2113047031, now seen corresponding path program 94 times [2020-10-13 10:56:28,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:28,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058975153] [2020-10-13 10:56:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:28,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:30,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:30,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-13 10:56:30,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:30,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-13 10:56:30,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:30,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 96 [2020-10-13 10:56:30,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:30,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-13 10:56:30,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:35,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:35,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:35,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:35,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:35,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:35,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:35,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:35,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:35,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058975153] [2020-10-13 10:56:35,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:35,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-10-13 10:56:35,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316141666] [2020-10-13 10:56:35,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-10-13 10:56:35,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:35,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-10-13 10:56:35,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-10-13 10:56:35,614 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 97 states. [2020-10-13 10:56:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:36,031 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2020-10-13 10:56:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-13 10:56:36,032 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 198 [2020-10-13 10:56:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:36,033 INFO L225 Difference]: With dead ends: 207 [2020-10-13 10:56:36,033 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 10:56:36,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2020-10-13 10:56:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 10:56:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2020-10-13 10:56:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-13 10:56:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2020-10-13 10:56:36,037 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2020-10-13 10:56:36,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:36,037 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2020-10-13 10:56:36,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-10-13 10:56:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2020-10-13 10:56:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-13 10:56:36,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:36,038 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:36,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-10-13 10:56:36,039 INFO L427 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash 254026805, now seen corresponding path program 95 times [2020-10-13 10:56:36,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:36,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796450552] [2020-10-13 10:56:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:36,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking...