/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-acceleration/simple_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:46:56,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:46:56,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:46:57,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:46:57,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:46:57,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:46:57,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:46:57,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:46:57,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:46:57,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:46:57,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:46:57,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:46:57,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:46:57,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:46:57,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:46:57,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:46:57,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:46:57,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:46:57,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:46:57,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:46:57,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:46:57,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:46:57,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:46:57,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:46:57,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:46:57,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:46:57,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:46:57,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:46:57,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:46:57,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:46:57,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:46:57,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:46:57,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:46:57,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:46:57,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:46:57,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:46:57,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:46:57,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:46:57,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:46:57,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:46:57,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:46:57,102 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 10:46:57,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:46:57,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:46:57,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:46:57,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:46:57,131 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:46:57,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:46:57,132 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:46:57,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:46:57,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:46:57,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:46:57,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:46:57,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:46:57,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:46:57,133 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:46:57,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:46:57,134 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:46:57,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:46:57,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:46:57,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:46:57,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:46:57,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:46:57,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:46:57,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:46:57,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:46:57,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:46:57,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:46:57,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:46:57,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:46:57,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:46:57,136 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 10:46:57,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:46:57,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:46:57,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:46:57,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:46:57,449 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:46:57,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2020-10-13 10:46:57,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a3753b3/d4f2fd72820c443e84a3fd7716fd7326/FLAG61378a7c4 [2020-10-13 10:46:57,954 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:46:57,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2020-10-13 10:46:57,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a3753b3/d4f2fd72820c443e84a3fd7716fd7326/FLAG61378a7c4 [2020-10-13 10:46:58,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4a3753b3/d4f2fd72820c443e84a3fd7716fd7326 [2020-10-13 10:46:58,343 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:46:58,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:46:58,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:46:58,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:46:58,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:46:58,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:58" (1/1) ... [2020-10-13 10:46:58,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e0ef97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58, skipping insertion in model container [2020-10-13 10:46:58,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:58" (1/1) ... [2020-10-13 10:46:58,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:46:58,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:46:58,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:46:58,592 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:46:58,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:46:58,622 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:46:58,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58 WrapperNode [2020-10-13 10:46:58,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:46:58,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:46:58,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:46:58,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:46:58,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58" (1/1) ... [2020-10-13 10:46:58,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58" (1/1) ... [2020-10-13 10:46:58,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58" (1/1) ... [2020-10-13 10:46:58,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58" (1/1) ... [2020-10-13 10:46:58,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58" (1/1) ... [2020-10-13 10:46:58,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58" (1/1) ... [2020-10-13 10:46:58,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58" (1/1) ... [2020-10-13 10:46:58,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:46:58,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:46:58,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:46:58,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:46:58,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58" (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 10:46:58,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:46:58,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:46:58,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:46:58,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:46:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:46:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:46:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:46:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:46:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:46:58,965 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:46:58,965 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:46:58,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:58 BoogieIcfgContainer [2020-10-13 10:46:58,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:46:58,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:46:58,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:46:58,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:46:58,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:46:58" (1/3) ... [2020-10-13 10:46:58,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660f38f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:46:58, skipping insertion in model container [2020-10-13 10:46:58,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:58" (2/3) ... [2020-10-13 10:46:58,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660f38f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:46:58, skipping insertion in model container [2020-10-13 10:46:58,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:58" (3/3) ... [2020-10-13 10:46:58,977 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2020-10-13 10:46:58,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:46:58,995 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:46:59,010 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:46:59,035 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:46:59,036 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:46:59,036 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:46:59,036 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:46:59,036 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:46:59,036 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:46:59,036 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:46:59,037 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:46:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-13 10:46:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:46:59,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:59,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:59,065 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:59,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-13 10:46:59,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:59,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189986435] [2020-10-13 10:46:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:59,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:59,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:59,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:46:59,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:59,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-13 10:46:59,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:59,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:46:59,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:59,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:46:59,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:46:59,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:59,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:59,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:59,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:59,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:59,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:46:59,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:59,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:59,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:59,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:59,379 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 10:46:59,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189986435] [2020-10-13 10:46:59,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:46:59,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:46:59,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958358153] [2020-10-13 10:46:59,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:46:59,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:59,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:46:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:46:59,415 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-13 10:46:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:59,481 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:46:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:46:59,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:46:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:59,496 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:46:59,496 INFO L226 Difference]: Without dead ends: 12 [2020-10-13 10:46:59,501 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 10:46:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-13 10:46:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-13 10:46:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-13 10:46:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-13 10:46:59,546 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-13 10:46:59,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:59,547 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-13 10:46:59,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:46:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-13 10:46:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 10:46:59,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:59,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:59,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:46:59,550 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-13 10:46:59,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:59,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343489253] [2020-10-13 10:46:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:59,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:59,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:59,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:46:59,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:59,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-13 10:46:59,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:59,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:46:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:46:59,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:46:59,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:59,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:59,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:59,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:46:59,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:59,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:46:59,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:59,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:59,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:59,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:59,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:46:59,803 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 10:46:59,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343489253] [2020-10-13 10:46:59,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:59,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:46:59,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032228596] [2020-10-13 10:46:59,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:46:59,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:59,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:46:59,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:46:59,808 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-10-13 10:46:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:59,828 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-13 10:46:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:46:59,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-13 10:46:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:59,830 INFO L225 Difference]: With dead ends: 18 [2020-10-13 10:46:59,830 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 10:46:59,831 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 10:46:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 10:46:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 10:46:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:46:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-13 10:46:59,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-13 10:46:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:59,837 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-13 10:46:59,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:46:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-13 10:46:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:46:59,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:59,838 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:59,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:46:59,839 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-13 10:46:59,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:59,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776333676] [2020-10-13 10:46:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:59,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:59,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:59,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:46:59,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:59,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-13 10:46:59,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:59,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:46:59,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:46:59,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:46:59,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:47:00,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:00,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:00,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:00,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:47:00,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:00,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:00,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:00,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776333676] [2020-10-13 10:47:00,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:00,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:47:00,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859401706] [2020-10-13 10:47:00,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:47:00,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:47:00,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:47:00,127 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-10-13 10:47:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:00,164 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-13 10:47:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:47:00,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-13 10:47:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:00,167 INFO L225 Difference]: With dead ends: 19 [2020-10-13 10:47:00,167 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:47:00,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:47:00,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:47:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:47:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:47:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-13 10:47:00,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-13 10:47:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:00,177 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-13 10:47:00,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:47:00,178 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-13 10:47:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:47:00,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:00,179 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:00,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:47:00,180 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:00,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-13 10:47:00,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:00,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982996900] [2020-10-13 10:47:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:00,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:47:00,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:00,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-13 10:47:00,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:00,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:47:00,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:00,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:47:00,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:00,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:00,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:00,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:00,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:00,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:00,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:00,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:00,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:00,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:00,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982996900] [2020-10-13 10:47:00,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:00,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:47:00,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224279341] [2020-10-13 10:47:00,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:47:00,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:00,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:47:00,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:47:00,490 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-10-13 10:47:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:00,531 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-13 10:47:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:47:00,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-13 10:47:00,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:00,533 INFO L225 Difference]: With dead ends: 20 [2020-10-13 10:47:00,533 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 10:47:00,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:47:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 10:47:00,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 10:47:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:47:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-13 10:47:00,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-13 10:47:00,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:00,542 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-13 10:47:00,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:47:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-13 10:47:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:47:00,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:00,549 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:00,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:47:00,550 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-10-13 10:47:00,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:00,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10188014] [2020-10-13 10:47:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:00,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:47:00,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:00,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-13 10:47:00,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:47:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:00,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:47:00,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:00,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:00,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:00,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:00,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:47:00,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:00,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:00,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:00,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:00,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:47:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:00,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10188014] [2020-10-13 10:47:00,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:00,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:47:00,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720812218] [2020-10-13 10:47:00,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:47:00,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:00,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:47:00,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:47:00,810 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-10-13 10:47:00,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:00,843 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-13 10:47:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:47:00,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-13 10:47:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:00,845 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:47:00,845 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:47:00,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:47:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:47:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:47:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:47:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-13 10:47:00,851 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-13 10:47:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:00,851 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-13 10:47:00,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:47:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-13 10:47:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:47:00,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:00,853 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:00,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:47:00,853 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:00,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-10-13 10:47:00,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:00,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287731255] [2020-10-13 10:47:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:00,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:47:00,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:00,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-13 10:47:00,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:47:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:00,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:47:00,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:01,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:01,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:01,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:01,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:01,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:01,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:01,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:01,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287731255] [2020-10-13 10:47:01,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:01,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:47:01,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934709304] [2020-10-13 10:47:01,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:47:01,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:01,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:47:01,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:47:01,079 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2020-10-13 10:47:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:01,119 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-13 10:47:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:47:01,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-13 10:47:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:01,121 INFO L225 Difference]: With dead ends: 22 [2020-10-13 10:47:01,121 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:47:01,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:47:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:47:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:47:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:47:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-13 10:47:01,126 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-13 10:47:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:01,127 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-13 10:47:01,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:47:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-13 10:47:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:47:01,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:01,128 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:01,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:47:01,128 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2020-10-13 10:47:01,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:01,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909732531] [2020-10-13 10:47:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:47:01,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:01,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 10:47:01,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:47:01,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:01,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:47:01,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:01,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:01,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:01,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:01,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:01,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:01,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:01,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909732531] [2020-10-13 10:47:01,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:01,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:47:01,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020264048] [2020-10-13 10:47:01,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:47:01,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:01,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:47:01,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:47:01,342 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-10-13 10:47:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:01,392 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-13 10:47:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:47:01,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-13 10:47:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:01,394 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:47:01,394 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:47:01,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:47:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:47:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 10:47:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 10:47:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-13 10:47:01,400 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-13 10:47:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:01,400 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-13 10:47:01,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:47:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-13 10:47:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:47:01,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:01,402 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:01,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:47:01,402 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash -6162383, now seen corresponding path program 7 times [2020-10-13 10:47:01,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:01,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254794035] [2020-10-13 10:47:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:47:01,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:01,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-13 10:47:01,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:47:01,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:01,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:47:01,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:01,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:01,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:01,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:01,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:01,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:01,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254794035] [2020-10-13 10:47:01,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:01,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:47:01,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92354626] [2020-10-13 10:47:01,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:47:01,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:01,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:47:01,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:47:01,736 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2020-10-13 10:47:01,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:01,804 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-13 10:47:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:47:01,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-13 10:47:01,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:01,807 INFO L225 Difference]: With dead ends: 24 [2020-10-13 10:47:01,807 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:47:01,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:47:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:47:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 10:47:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:47:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-13 10:47:01,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-13 10:47:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:01,816 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-13 10:47:01,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:47:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-13 10:47:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:47:01,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:01,818 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:01,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:47:01,819 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash -154572610, now seen corresponding path program 8 times [2020-10-13 10:47:01,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:01,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422967949] [2020-10-13 10:47:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:47:01,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:01,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-13 10:47:01,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:47:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:01,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:47:01,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:02,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:02,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:02,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:02,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:02,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:02,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:02,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:02,104 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 10:47:02,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422967949] [2020-10-13 10:47:02,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:02,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:47:02,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715624621] [2020-10-13 10:47:02,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:47:02,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:02,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:47:02,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:47:02,107 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2020-10-13 10:47:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:02,175 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-13 10:47:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:47:02,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-13 10:47:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:02,176 INFO L225 Difference]: With dead ends: 25 [2020-10-13 10:47:02,176 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 10:47:02,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:47:02,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 10:47:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 10:47:02,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:47:02,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-13 10:47:02,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-13 10:47:02,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:02,182 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-13 10:47:02,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:47:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-13 10:47:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:47:02,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:02,183 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:02,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:47:02,183 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash -460322351, now seen corresponding path program 9 times [2020-10-13 10:47:02,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:02,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74596886] [2020-10-13 10:47:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:47:02,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:02,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-13 10:47:02,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:47:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:47:02,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:02,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:02,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:02,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:02,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:02,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:02,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:02,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:02,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74596886] [2020-10-13 10:47:02,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:02,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:47:02,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425691781] [2020-10-13 10:47:02,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:47:02,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:47:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:47:02,503 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2020-10-13 10:47:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:02,580 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-13 10:47:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:47:02,580 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-13 10:47:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:02,581 INFO L225 Difference]: With dead ends: 26 [2020-10-13 10:47:02,581 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 10:47:02,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:47:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 10:47:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 10:47:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:47:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-13 10:47:02,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-13 10:47:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:02,586 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-13 10:47:02,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:47:02,587 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-13 10:47:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:47:02,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:02,587 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:02,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:47:02,588 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1348629730, now seen corresponding path program 10 times [2020-10-13 10:47:02,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:02,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935307298] [2020-10-13 10:47:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:47:02,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-13 10:47:02,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:47:02,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:02,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:47:02,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:02,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:02,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:02,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:02,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:02,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:02,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935307298] [2020-10-13 10:47:02,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:02,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:47:02,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127433223] [2020-10-13 10:47:02,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:47:02,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:02,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:47:02,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:47:02,905 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2020-10-13 10:47:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:03,015 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-13 10:47:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:47:03,016 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-13 10:47:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:03,017 INFO L225 Difference]: With dead ends: 27 [2020-10-13 10:47:03,017 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:47:03,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:47:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:47:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 10:47:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:47:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-13 10:47:03,022 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-13 10:47:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:03,022 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-13 10:47:03,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:47:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-13 10:47:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:47:03,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:03,024 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:03,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:47:03,024 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:03,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1178612593, now seen corresponding path program 11 times [2020-10-13 10:47:03,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:03,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150993173] [2020-10-13 10:47:03,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:03,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:03,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:03,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:47:03,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:03,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-13 10:47:03,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:47:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:47:03,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:03,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:03,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:03,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:03,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:03,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:03,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:03,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:03,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:03,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:03,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:03,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:03,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150993173] [2020-10-13 10:47:03,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:03,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:47:03,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869877247] [2020-10-13 10:47:03,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:47:03,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:47:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:47:03,402 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2020-10-13 10:47:03,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:03,499 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-13 10:47:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:47:03,500 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-10-13 10:47:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:03,501 INFO L225 Difference]: With dead ends: 28 [2020-10-13 10:47:03,501 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:47:03,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:47:03,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:47:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 10:47:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:47:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-13 10:47:03,506 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-13 10:47:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:03,506 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-13 10:47:03,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:47:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-13 10:47:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:47:03,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:03,507 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:03,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:47:03,508 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:03,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:03,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2081254018, now seen corresponding path program 12 times [2020-10-13 10:47:03,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:03,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042043593] [2020-10-13 10:47:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:03,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:03,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:03,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:47:03,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-13 10:47:03,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:47:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:47:03,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:04,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:04,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:04,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:04,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:04,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:04,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:04,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:04,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:04,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:04,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:04,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:04,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042043593] [2020-10-13 10:47:04,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:04,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:47:04,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544748653] [2020-10-13 10:47:04,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:47:04,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:04,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:47:04,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:47:04,043 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2020-10-13 10:47:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:04,196 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-13 10:47:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:47:04,197 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-10-13 10:47:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:04,198 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:47:04,198 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:47:04,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:47:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:47:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 10:47:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 10:47:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-13 10:47:04,204 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-13 10:47:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:04,204 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-13 10:47:04,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:47:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-13 10:47:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:47:04,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:04,206 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:04,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:47:04,206 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:04,207 INFO L82 PathProgramCache]: Analyzing trace with hash -57903855, now seen corresponding path program 13 times [2020-10-13 10:47:04,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:04,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657669458] [2020-10-13 10:47:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:04,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:04,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:04,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:47:04,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:04,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-13 10:47:04,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:04,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:47:04,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:04,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:47:04,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:04,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:04,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:04,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:04,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:04,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:04,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:04,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:04,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:04,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:04,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:04,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:04,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657669458] [2020-10-13 10:47:04,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:04,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:47:04,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007792939] [2020-10-13 10:47:04,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:47:04,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:04,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:47:04,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:47:04,732 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2020-10-13 10:47:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:04,867 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-13 10:47:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:47:04,868 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-10-13 10:47:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:04,868 INFO L225 Difference]: With dead ends: 30 [2020-10-13 10:47:04,869 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:47:04,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:47:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:47:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 10:47:04,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:47:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-13 10:47:04,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-13 10:47:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:04,874 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-13 10:47:04,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:47:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-13 10:47:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:47:04,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:04,875 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:04,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:47:04,875 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:04,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:04,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1758558242, now seen corresponding path program 14 times [2020-10-13 10:47:04,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:04,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739726738] [2020-10-13 10:47:04,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:04,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:05,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:05,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:47:05,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:05,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-13 10:47:05,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:47:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:05,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:47:05,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:05,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:05,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:05,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:05,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:05,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:05,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:05,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:05,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:05,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:05,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:05,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:05,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739726738] [2020-10-13 10:47:05,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:05,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:47:05,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462831202] [2020-10-13 10:47:05,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:47:05,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:05,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:47:05,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:47:05,488 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2020-10-13 10:47:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:05,635 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-13 10:47:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:47:05,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-13 10:47:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:05,637 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:47:05,637 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:47:05,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:47:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:47:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 10:47:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:47:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-13 10:47:05,642 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-13 10:47:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:05,642 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-13 10:47:05,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:47:05,642 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-13 10:47:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:47:05,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:05,643 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:05,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:47:05,644 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:05,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1355730609, now seen corresponding path program 15 times [2020-10-13 10:47:05,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:05,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610794439] [2020-10-13 10:47:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:05,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:05,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:05,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:47:05,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:05,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-13 10:47:05,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:47:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:47:05,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:06,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:06,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:06,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:06,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:06,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:06,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:06,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:06,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:06,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:06,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:06,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610794439] [2020-10-13 10:47:06,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:06,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:47:06,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964839448] [2020-10-13 10:47:06,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:47:06,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:47:06,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:47:06,258 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2020-10-13 10:47:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:06,423 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-13 10:47:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:47:06,424 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2020-10-13 10:47:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:06,424 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:47:06,425 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:47:06,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:47:06,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:47:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:47:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:47:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-13 10:47:06,429 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-13 10:47:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:06,430 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-13 10:47:06,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:47:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-13 10:47:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:47:06,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:06,431 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:06,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:47:06,432 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash -885562818, now seen corresponding path program 16 times [2020-10-13 10:47:06,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:06,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975037109] [2020-10-13 10:47:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:06,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:06,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:06,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:47:06,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:06,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-13 10:47:06,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:06,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:47:06,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:06,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:47:06,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:07,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:07,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:07,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:07,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:07,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:07,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:07,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:07,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:07,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975037109] [2020-10-13 10:47:07,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:07,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:47:07,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549753693] [2020-10-13 10:47:07,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:47:07,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:47:07,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:47:07,098 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2020-10-13 10:47:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:07,286 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-13 10:47:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:47:07,287 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-10-13 10:47:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:07,287 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:47:07,288 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 10:47:07,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:47:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 10:47:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 10:47:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 10:47:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-13 10:47:07,292 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-13 10:47:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:07,293 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-13 10:47:07,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:47:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-13 10:47:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:47:07,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:07,294 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:07,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:47:07,294 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:07,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1646182319, now seen corresponding path program 17 times [2020-10-13 10:47:07,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:07,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277601081] [2020-10-13 10:47:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:07,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:07,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:07,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:47:07,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:07,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-13 10:47:07,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:07,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:47:07,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:07,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:47:07,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:07,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:07,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:07,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:07,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:07,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:07,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:07,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:07,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:07,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:07,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:07,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:07,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277601081] [2020-10-13 10:47:07,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:07,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:47:07,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411204274] [2020-10-13 10:47:07,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:47:07,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:07,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:47:07,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:47:07,984 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2020-10-13 10:47:08,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:08,191 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-13 10:47:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:47:08,192 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-10-13 10:47:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:08,193 INFO L225 Difference]: With dead ends: 34 [2020-10-13 10:47:08,193 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:47:08,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:47:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:47:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 10:47:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:47:08,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-13 10:47:08,197 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-13 10:47:08,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:08,198 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-13 10:47:08,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:47:08,198 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-13 10:47:08,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:47:08,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:08,199 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:08,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:47:08,199 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:08,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:08,199 INFO L82 PathProgramCache]: Analyzing trace with hash 544416926, now seen corresponding path program 18 times [2020-10-13 10:47:08,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:08,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667099541] [2020-10-13 10:47:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:08,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:08,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:08,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:47:08,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:08,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-13 10:47:08,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:08,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:47:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:08,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:47:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:08,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:08,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:08,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:08,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:08,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:08,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:08,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:08,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:08,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:08,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:08,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:08,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667099541] [2020-10-13 10:47:08,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:08,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:47:08,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59847801] [2020-10-13 10:47:08,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:47:08,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:08,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:47:08,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:47:08,950 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2020-10-13 10:47:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:09,173 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-13 10:47:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:47:09,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2020-10-13 10:47:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:09,174 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:47:09,175 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 10:47:09,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:47:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 10:47:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 10:47:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:47:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-13 10:47:09,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-13 10:47:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:09,180 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-13 10:47:09,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:47:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-13 10:47:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:47:09,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:09,181 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:09,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:47:09,181 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash -266483215, now seen corresponding path program 19 times [2020-10-13 10:47:09,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:09,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44661762] [2020-10-13 10:47:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:09,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:09,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:09,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:47:09,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:09,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-13 10:47:09,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:47:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:47:09,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:10,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:10,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:10,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:10,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:10,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:10,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:10,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:10,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:10,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44661762] [2020-10-13 10:47:10,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:10,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:47:10,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854652080] [2020-10-13 10:47:10,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:47:10,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:10,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:47:10,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:47:10,087 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2020-10-13 10:47:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:10,336 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-13 10:47:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:47:10,337 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2020-10-13 10:47:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:10,338 INFO L225 Difference]: With dead ends: 36 [2020-10-13 10:47:10,338 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:47:10,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:47:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:47:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 10:47:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:47:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-13 10:47:10,344 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-13 10:47:10,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:10,344 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-13 10:47:10,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:47:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-13 10:47:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:47:10,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:10,345 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:10,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:47:10,346 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:10,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash 365416190, now seen corresponding path program 20 times [2020-10-13 10:47:10,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:10,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921437666] [2020-10-13 10:47:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:10,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:10,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:10,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:47:10,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:10,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-13 10:47:10,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:47:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:47:10,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:11,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:11,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:11,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:11,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:11,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:11,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:11,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:11,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:11,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:11,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921437666] [2020-10-13 10:47:11,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:11,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:47:11,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329987628] [2020-10-13 10:47:11,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:47:11,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:11,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:47:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:47:11,270 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2020-10-13 10:47:11,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:11,540 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-13 10:47:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:47:11,541 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2020-10-13 10:47:11,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:11,541 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:47:11,541 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:47:11,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:47:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:47:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 10:47:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:47:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-13 10:47:11,546 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-13 10:47:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:11,547 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-13 10:47:11,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:47:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-13 10:47:11,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:47:11,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:11,549 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:11,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:47:11,549 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:11,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1520538735, now seen corresponding path program 21 times [2020-10-13 10:47:11,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:11,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733488803] [2020-10-13 10:47:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:11,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:12,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:12,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:47:12,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:12,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-13 10:47:12,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:12,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:47:12,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:12,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:47:12,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:12,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:12,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:12,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:12,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:12,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:12,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:12,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:12,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:12,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:12,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:12,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:12,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733488803] [2020-10-13 10:47:12,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:12,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:47:12,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139512036] [2020-10-13 10:47:12,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:47:12,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:12,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:47:12,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:47:12,571 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2020-10-13 10:47:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:12,890 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-13 10:47:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:47:12,892 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2020-10-13 10:47:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:12,893 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:47:12,893 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 10:47:12,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:47:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 10:47:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 10:47:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:47:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-13 10:47:12,904 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-13 10:47:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:12,904 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-13 10:47:12,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:47:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-13 10:47:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:47:12,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:12,905 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:12,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:47:12,906 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:12,906 INFO L82 PathProgramCache]: Analyzing trace with hash 144400734, now seen corresponding path program 22 times [2020-10-13 10:47:12,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:12,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3294497] [2020-10-13 10:47:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:12,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:13,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:13,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:47:13,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:13,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-13 10:47:13,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:47:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:13,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:47:13,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:13,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:13,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:13,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:13,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:13,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:13,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:13,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:13,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:13,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3294497] [2020-10-13 10:47:13,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:13,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:47:13,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414016252] [2020-10-13 10:47:13,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:47:13,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:47:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:47:13,855 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2020-10-13 10:47:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:14,201 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-13 10:47:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:47:14,201 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2020-10-13 10:47:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:14,202 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:47:14,202 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 10:47:14,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:47:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 10:47:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 10:47:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 10:47:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-13 10:47:14,207 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-13 10:47:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:14,208 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-13 10:47:14,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:47:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-13 10:47:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:47:14,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:14,208 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:14,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:47:14,209 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash 217916721, now seen corresponding path program 23 times [2020-10-13 10:47:14,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:14,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45826283] [2020-10-13 10:47:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:14,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:14,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:14,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:47:14,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:14,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-13 10:47:14,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:14,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:47:14,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:47:14,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:15,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:15,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:15,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:15,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:15,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:15,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:15,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:15,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:15,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:15,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:15,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:15,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45826283] [2020-10-13 10:47:15,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:15,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:47:15,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482920923] [2020-10-13 10:47:15,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:47:15,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:15,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:47:15,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:47:15,288 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2020-10-13 10:47:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:15,697 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-13 10:47:15,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:47:15,700 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2020-10-13 10:47:15,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:15,701 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:47:15,701 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:47:15,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:47:15,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:47:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 10:47:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:47:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-13 10:47:15,710 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-13 10:47:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:15,711 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-13 10:47:15,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:47:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-13 10:47:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:47:15,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:15,711 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:15,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:47:15,712 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:15,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:15,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1798054978, now seen corresponding path program 24 times [2020-10-13 10:47:15,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:15,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055289298] [2020-10-13 10:47:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:15,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:16,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:16,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:47:16,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:16,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-10-13 10:47:16,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:47:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:47:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:16,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:16,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:16,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:16,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:16,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:16,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:16,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:16,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:16,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:16,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:16,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:16,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055289298] [2020-10-13 10:47:16,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:16,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:47:16,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197681076] [2020-10-13 10:47:16,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:47:16,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:16,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:47:16,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:47:16,779 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2020-10-13 10:47:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:17,207 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-13 10:47:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:47:17,213 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2020-10-13 10:47:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:17,213 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:47:17,213 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:47:17,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:47:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:47:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 10:47:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:47:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-13 10:47:17,218 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-13 10:47:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:17,219 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-13 10:47:17,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:47:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-13 10:47:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:47:17,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:17,219 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:17,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:47:17,220 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash 131331793, now seen corresponding path program 25 times [2020-10-13 10:47:17,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:17,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295384061] [2020-10-13 10:47:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:17,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:18,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:18,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:47:18,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:18,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1148 [2020-10-13 10:47:18,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:47:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:18,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:47:18,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:18,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:18,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:18,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:18,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:18,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:18,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:18,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:18,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:18,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:18,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:18,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:18,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295384061] [2020-10-13 10:47:18,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:18,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:47:18,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008390933] [2020-10-13 10:47:18,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:47:18,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:18,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:47:18,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:47:18,855 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2020-10-13 10:47:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:19,312 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-13 10:47:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:47:19,313 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2020-10-13 10:47:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:19,314 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:47:19,314 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:47:19,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:47:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:47:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 10:47:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:47:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-13 10:47:19,319 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-13 10:47:19,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:19,319 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-13 10:47:19,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:47:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-13 10:47:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:47:19,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:19,320 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:19,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:47:19,320 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash -187220450, now seen corresponding path program 26 times [2020-10-13 10:47:19,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:19,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193685475] [2020-10-13 10:47:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:20,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:20,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:47:20,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:20,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-13 10:47:20,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:47:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:47:20,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:20,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:20,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:20,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:20,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:20,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:20,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:20,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:20,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:20,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:20,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:20,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:20,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193685475] [2020-10-13 10:47:20,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:20,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:47:20,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141173543] [2020-10-13 10:47:20,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:47:20,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:20,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:47:20,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:47:20,905 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2020-10-13 10:47:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:21,398 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-13 10:47:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:47:21,399 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2020-10-13 10:47:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:21,400 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:47:21,400 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:47:21,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:47:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:47:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 10:47:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:47:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-13 10:47:21,406 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-13 10:47:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:21,406 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-13 10:47:21,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:47:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-13 10:47:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:47:21,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:21,407 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:21,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:47:21,408 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:21,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:21,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1472405391, now seen corresponding path program 27 times [2020-10-13 10:47:21,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:21,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766500030] [2020-10-13 10:47:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:21,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:22,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:22,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:47:22,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:22,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-13 10:47:22,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:47:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:22,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:47:22,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:22,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:22,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:22,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:22,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:22,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:22,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:47:22,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:22,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:22,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766500030] [2020-10-13 10:47:22,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:22,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:47:22,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875403339] [2020-10-13 10:47:22,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:47:22,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:22,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:47:22,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:47:22,756 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2020-10-13 10:47:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:23,248 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-13 10:47:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:47:23,249 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2020-10-13 10:47:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:23,249 INFO L225 Difference]: With dead ends: 44 [2020-10-13 10:47:23,249 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:47:23,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:47:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:47:23,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 10:47:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:47:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-13 10:47:23,256 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-13 10:47:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:23,256 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-13 10:47:23,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:47:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-13 10:47:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:47:23,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:23,257 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:23,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:47:23,257 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:23,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:23,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1636534398, now seen corresponding path program 28 times [2020-10-13 10:47:23,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:23,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879691473] [2020-10-13 10:47:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:23,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:24,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:24,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:47:24,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:24,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-13 10:47:24,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:24,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:47:24,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:24,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:47:24,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:24,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:24,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:24,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:24,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:24,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:24,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:24,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:24,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:24,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879691473] [2020-10-13 10:47:24,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:24,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:47:24,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772762868] [2020-10-13 10:47:24,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:47:24,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:24,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:47:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:47:24,722 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2020-10-13 10:47:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:25,283 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-13 10:47:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:47:25,283 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2020-10-13 10:47:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:25,284 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:47:25,284 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:47:25,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:47:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:47:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 10:47:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:47:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-13 10:47:25,290 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-13 10:47:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:25,290 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-13 10:47:25,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:47:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-13 10:47:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:47:25,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:25,291 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:25,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:47:25,291 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:25,291 INFO L82 PathProgramCache]: Analyzing trace with hash -770579951, now seen corresponding path program 29 times [2020-10-13 10:47:25,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:25,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899395428] [2020-10-13 10:47:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:25,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:26,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:26,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:47:26,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:26,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-10-13 10:47:26,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:47:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:47:26,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:26,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:26,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:26,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:26,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:26,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:26,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:26,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:26,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:26,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:26,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:26,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:26,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899395428] [2020-10-13 10:47:26,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:26,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:47:26,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148720566] [2020-10-13 10:47:26,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:47:26,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:26,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:47:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:47:26,840 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2020-10-13 10:47:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:27,439 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-13 10:47:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:47:27,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2020-10-13 10:47:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:27,440 INFO L225 Difference]: With dead ends: 46 [2020-10-13 10:47:27,440 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:47:27,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:47:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:47:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 10:47:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:47:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-13 10:47:27,446 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-13 10:47:27,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:27,446 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-13 10:47:27,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:47:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-13 10:47:27,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:47:27,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:27,447 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:27,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:47:27,447 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:27,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1918286558, now seen corresponding path program 30 times [2020-10-13 10:47:27,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:27,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601697993] [2020-10-13 10:47:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:27,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:28,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:28,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:47:28,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1083 [2020-10-13 10:47:28,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:47:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:47:28,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:29,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:29,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:29,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:29,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:29,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:29,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:29,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:29,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:29,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:29,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:29,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:29,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601697993] [2020-10-13 10:47:29,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:29,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:47:29,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821942917] [2020-10-13 10:47:29,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:47:29,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:29,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:47:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:47:29,348 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2020-10-13 10:47:29,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:29,961 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-13 10:47:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:47:29,963 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2020-10-13 10:47:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:29,963 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:47:29,964 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:47:29,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:47:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:47:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-13 10:47:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:47:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-13 10:47:29,967 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-13 10:47:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:29,968 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-13 10:47:29,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:47:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-13 10:47:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:47:29,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:29,968 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:29,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:47:29,968 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:29,969 INFO L82 PathProgramCache]: Analyzing trace with hash -626197583, now seen corresponding path program 31 times [2020-10-13 10:47:29,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:29,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618317898] [2020-10-13 10:47:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:29,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:30,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:30,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:47:30,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:30,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-13 10:47:30,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:30,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:47:30,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:30,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:47:30,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:31,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:31,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:31,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:31,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:31,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:31,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:31,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:31,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618317898] [2020-10-13 10:47:31,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:31,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:47:31,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125303398] [2020-10-13 10:47:31,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:47:31,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:31,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:47:31,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:47:31,607 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2020-10-13 10:47:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:32,268 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-13 10:47:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:47:32,270 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2020-10-13 10:47:32,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:32,271 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:47:32,271 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:47:32,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:47:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:47:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 10:47:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:47:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-13 10:47:32,276 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-13 10:47:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:32,276 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-13 10:47:32,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:47:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-13 10:47:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:47:32,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:32,277 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:32,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:47:32,277 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:32,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2099172670, now seen corresponding path program 32 times [2020-10-13 10:47:32,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:32,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348115584] [2020-10-13 10:47:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:32,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:32,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:32,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:47:32,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:32,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 696 [2020-10-13 10:47:32,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:32,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:47:32,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:32,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:47:32,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:33,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:33,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:33,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:33,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:33,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:33,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:33,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:33,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:33,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348115584] [2020-10-13 10:47:33,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:33,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:47:33,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046561928] [2020-10-13 10:47:33,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:47:33,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:33,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:47:33,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:47:33,833 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2020-10-13 10:47:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:34,501 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-13 10:47:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:47:34,501 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2020-10-13 10:47:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:34,502 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:47:34,502 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:47:34,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:47:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:47:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 10:47:34,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:47:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-13 10:47:34,512 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-13 10:47:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:34,513 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-13 10:47:34,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:47:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-13 10:47:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:47:34,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:34,516 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:34,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:47:34,516 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash 686304593, now seen corresponding path program 33 times [2020-10-13 10:47:34,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:34,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717180748] [2020-10-13 10:47:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:34,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:35,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:35,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:47:35,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:35,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-13 10:47:35,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:35,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:47:35,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:35,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:47:35,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:36,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:36,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:36,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:36,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:36,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:36,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:36,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:36,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:36,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717180748] [2020-10-13 10:47:36,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:36,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:47:36,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383648032] [2020-10-13 10:47:36,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:47:36,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:36,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:47:36,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:47:36,205 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2020-10-13 10:47:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:36,969 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-13 10:47:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:47:36,969 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2020-10-13 10:47:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:36,970 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:47:36,970 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 10:47:36,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:47:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 10:47:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 10:47:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:47:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-13 10:47:36,975 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-13 10:47:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:36,975 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-13 10:47:36,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:47:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-13 10:47:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:47:36,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:36,976 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:36,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:47:36,976 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:36,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:36,977 INFO L82 PathProgramCache]: Analyzing trace with hash -162932834, now seen corresponding path program 34 times [2020-10-13 10:47:36,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:36,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755279564] [2020-10-13 10:47:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:36,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:37,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:37,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:47:37,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:37,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 872 [2020-10-13 10:47:37,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:37,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:47:37,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:37,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:47:37,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:38,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:38,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:38,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:38,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:38,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:38,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:38,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:38,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:38,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:38,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:38,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:38,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755279564] [2020-10-13 10:47:38,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:38,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:47:38,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535193582] [2020-10-13 10:47:38,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:47:38,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:38,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:47:38,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:47:38,828 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2020-10-13 10:47:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:39,631 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-13 10:47:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:47:39,631 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-10-13 10:47:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:39,632 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:47:39,632 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:47:39,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:47:39,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:47:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 10:47:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:47:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-13 10:47:39,638 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-13 10:47:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:39,638 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-13 10:47:39,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:47:39,638 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-13 10:47:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:47:39,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:39,639 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:39,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:47:39,639 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:39,640 INFO L82 PathProgramCache]: Analyzing trace with hash -719489295, now seen corresponding path program 35 times [2020-10-13 10:47:39,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:39,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907874829] [2020-10-13 10:47:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:39,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:40,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:40,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:47:40,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:40,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-13 10:47:40,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:40,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:47:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:47:40,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:41,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:41,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:41,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:41,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:41,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:41,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:41,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:41,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:41,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:41,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:41,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:41,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907874829] [2020-10-13 10:47:41,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:41,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:47:41,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485550560] [2020-10-13 10:47:41,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:47:41,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:47:41,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:47:41,638 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2020-10-13 10:47:42,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:42,465 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-13 10:47:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:47:42,466 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2020-10-13 10:47:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:42,467 INFO L225 Difference]: With dead ends: 52 [2020-10-13 10:47:42,467 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:47:42,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:47:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:47:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 10:47:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:47:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-13 10:47:42,473 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-13 10:47:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:42,473 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-13 10:47:42,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:47:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-13 10:47:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:47:42,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:42,474 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:42,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:47:42,475 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:42,475 INFO L82 PathProgramCache]: Analyzing trace with hash -792870402, now seen corresponding path program 36 times [2020-10-13 10:47:42,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:42,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163037522] [2020-10-13 10:47:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:42,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:43,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:43,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:47:43,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:43,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-13 10:47:43,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:47:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:47:43,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:44,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:44,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:44,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:44,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:44,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:44,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:44,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:44,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:44,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:44,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:44,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163037522] [2020-10-13 10:47:44,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:44,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:47:44,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652144260] [2020-10-13 10:47:44,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:47:44,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:47:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:47:44,383 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2020-10-13 10:47:45,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:45,280 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-13 10:47:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:47:45,282 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2020-10-13 10:47:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:45,283 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:47:45,283 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 10:47:45,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:47:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 10:47:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-13 10:47:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:47:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-13 10:47:45,288 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-13 10:47:45,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:45,288 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-13 10:47:45,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:47:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-13 10:47:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:47:45,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:45,289 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:45,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:47:45,289 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1227282577, now seen corresponding path program 37 times [2020-10-13 10:47:45,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:45,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600100683] [2020-10-13 10:47:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:45,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:46,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:46,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:47:46,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:46,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-13 10:47:46,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:46,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:47:46,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:46,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:47:46,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:47,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:47,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:47,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:47,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:47,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:47,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:47,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:47,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:47,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:47,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:47,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:47,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600100683] [2020-10-13 10:47:47,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:47,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:47:47,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401104075] [2020-10-13 10:47:47,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:47:47,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:47,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:47:47,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:47:47,560 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2020-10-13 10:47:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:48,472 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-13 10:47:48,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:47:48,472 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2020-10-13 10:47:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:48,473 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:47:48,473 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:47:48,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:47:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:47:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 10:47:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:47:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-13 10:47:48,478 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-13 10:47:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:48,478 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-13 10:47:48,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:47:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-13 10:47:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:47:48,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:48,479 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:48,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:47:48,479 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:48,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:48,480 INFO L82 PathProgramCache]: Analyzing trace with hash -572484514, now seen corresponding path program 38 times [2020-10-13 10:47:48,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:48,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7833812] [2020-10-13 10:47:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:48,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:49,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:49,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:47:49,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:49,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-13 10:47:49,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:49,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:47:49,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:49,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:47:49,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:50,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:50,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:50,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:50,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:50,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:50,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:50,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:50,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:50,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:50,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:50,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:50,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7833812] [2020-10-13 10:47:50,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:50,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:47:50,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154377572] [2020-10-13 10:47:50,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:47:50,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:50,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:47:50,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:47:50,693 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2020-10-13 10:47:51,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:51,693 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-13 10:47:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:47:51,694 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2020-10-13 10:47:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:51,695 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:47:51,695 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:47:51,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:47:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:47:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 10:47:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 10:47:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-13 10:47:51,700 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-13 10:47:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:51,700 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-13 10:47:51,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:47:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-13 10:47:51,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:47:51,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:51,701 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:51,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:47:51,701 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:51,702 INFO L82 PathProgramCache]: Analyzing trace with hash -530689487, now seen corresponding path program 39 times [2020-10-13 10:47:51,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:51,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114217000] [2020-10-13 10:47:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:51,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:52,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:52,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:47:52,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1087 [2020-10-13 10:47:52,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 10:47:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:47:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:54,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:54,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:54,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:54,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:54,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:54,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:54,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:54,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:54,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:54,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:54,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:54,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114217000] [2020-10-13 10:47:54,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:54,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 10:47:54,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133346918] [2020-10-13 10:47:54,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 10:47:54,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:54,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 10:47:54,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:47:54,022 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2020-10-13 10:47:55,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:55,080 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-13 10:47:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 10:47:55,081 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2020-10-13 10:47:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:55,081 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:47:55,082 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 10:47:55,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:47:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 10:47:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 10:47:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:47:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-13 10:47:55,086 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-13 10:47:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:55,087 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-13 10:47:55,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 10:47:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-13 10:47:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:47:55,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:55,087 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:55,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:47:55,088 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:55,088 INFO L82 PathProgramCache]: Analyzing trace with hash 764956350, now seen corresponding path program 40 times [2020-10-13 10:47:55,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:55,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000630257] [2020-10-13 10:47:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:55,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:56,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:56,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:47:56,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:56,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-13 10:47:56,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 10:47:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:47:56,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:57,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:57,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:57,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:57,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:57,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:57,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:47:57,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:57,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:57,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:57,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:57,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:57,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000630257] [2020-10-13 10:47:57,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:57,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 10:47:57,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074107242] [2020-10-13 10:47:57,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 10:47:57,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:57,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 10:47:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:47:57,413 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2020-10-13 10:47:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:58,536 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-13 10:47:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 10:47:58,537 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2020-10-13 10:47:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:58,538 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:47:58,538 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:47:58,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:47:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:47:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 10:47:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:47:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-13 10:47:58,543 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-13 10:47:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:58,543 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-13 10:47:58,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 10:47:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-13 10:47:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:47:58,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:58,544 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:58,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:47:58,545 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2019695663, now seen corresponding path program 41 times [2020-10-13 10:47:58,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:58,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485368826] [2020-10-13 10:47:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:58,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:00,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:00,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:48:00,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:00,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1516 [2020-10-13 10:48:00,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 10:48:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:48:00,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:01,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:01,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:01,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:01,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:01,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:01,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:01,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:01,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:01,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:01,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:01,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:01,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485368826] [2020-10-13 10:48:01,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:01,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 10:48:01,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897200866] [2020-10-13 10:48:01,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 10:48:01,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:01,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 10:48:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:48:01,401 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2020-10-13 10:48:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:02,562 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-13 10:48:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 10:48:02,563 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2020-10-13 10:48:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:02,564 INFO L225 Difference]: With dead ends: 58 [2020-10-13 10:48:02,564 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:48:02,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:48:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:48:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 10:48:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:48:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-13 10:48:02,569 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-13 10:48:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:02,570 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-13 10:48:02,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 10:48:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-13 10:48:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:48:02,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:02,570 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:02,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:48:02,571 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:02,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1850405150, now seen corresponding path program 42 times [2020-10-13 10:48:02,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:02,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893711387] [2020-10-13 10:48:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:02,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:03,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:03,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:48:03,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:03,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1329 [2020-10-13 10:48:03,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:03,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 10:48:03,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:03,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:48:03,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:05,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:05,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:05,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:05,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:05,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:05,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:05,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:05,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:05,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893711387] [2020-10-13 10:48:05,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:05,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 10:48:05,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108333918] [2020-10-13 10:48:05,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 10:48:05,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:05,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 10:48:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:48:05,238 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2020-10-13 10:48:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:06,478 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-13 10:48:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 10:48:06,480 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2020-10-13 10:48:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:06,481 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:48:06,481 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:48:06,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:48:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:48:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-13 10:48:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:48:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-13 10:48:06,485 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-13 10:48:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:06,486 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-13 10:48:06,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 10:48:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-13 10:48:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:48:06,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:06,487 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:06,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:48:06,487 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:06,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1564446065, now seen corresponding path program 43 times [2020-10-13 10:48:06,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:06,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898881609] [2020-10-13 10:48:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:06,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:08,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:08,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 10:48:08,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:08,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-13 10:48:08,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:08,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 10:48:08,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:08,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:48:08,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:09,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:09,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:09,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:09,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:09,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:09,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:09,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:09,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:09,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:09,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:09,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898881609] [2020-10-13 10:48:09,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:09,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 10:48:09,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464018347] [2020-10-13 10:48:09,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 10:48:09,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:09,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 10:48:09,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:48:09,712 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2020-10-13 10:48:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:11,016 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-13 10:48:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 10:48:11,016 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2020-10-13 10:48:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:11,017 INFO L225 Difference]: With dead ends: 60 [2020-10-13 10:48:11,017 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:48:11,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:48:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:48:11,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 10:48:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:48:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-13 10:48:11,022 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-13 10:48:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:11,022 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-13 10:48:11,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 10:48:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-13 10:48:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:48:11,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:11,023 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:11,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:48:11,023 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1289649022, now seen corresponding path program 44 times [2020-10-13 10:48:11,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:11,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790670576] [2020-10-13 10:48:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:11,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:13,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:13,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:48:13,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:13,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1987 [2020-10-13 10:48:13,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:13,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 10:48:13,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:13,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:48:13,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:14,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:14,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:14,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:14,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:14,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:14,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:14,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:14,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:14,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:14,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:14,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:14,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790670576] [2020-10-13 10:48:14,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:14,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 10:48:14,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253176952] [2020-10-13 10:48:14,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 10:48:14,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 10:48:14,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:48:14,523 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2020-10-13 10:48:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:15,896 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-13 10:48:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 10:48:15,897 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2020-10-13 10:48:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:15,898 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:48:15,898 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:48:15,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:48:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:48:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 10:48:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:48:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-13 10:48:15,903 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-13 10:48:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:15,903 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-13 10:48:15,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 10:48:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-13 10:48:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:48:15,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:15,904 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:15,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:48:15,905 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1360875281, now seen corresponding path program 45 times [2020-10-13 10:48:15,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:15,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682483355] [2020-10-13 10:48:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:15,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:17,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:17,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:48:17,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:17,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1714 [2020-10-13 10:48:17,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 10:48:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:48:17,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:19,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:19,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:19,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:19,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:19,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:19,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:19,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:19,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:19,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:19,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:19,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:19,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682483355] [2020-10-13 10:48:19,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:19,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 10:48:19,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973203430] [2020-10-13 10:48:19,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 10:48:19,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:19,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 10:48:19,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:48:19,183 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2020-10-13 10:48:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:20,574 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-13 10:48:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 10:48:20,575 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2020-10-13 10:48:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:20,576 INFO L225 Difference]: With dead ends: 62 [2020-10-13 10:48:20,576 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:48:20,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:48:20,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:48:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-13 10:48:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:48:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-13 10:48:20,580 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-13 10:48:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:20,581 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-13 10:48:20,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 10:48:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-13 10:48:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:48:20,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:20,581 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:20,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:48:20,581 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash -726077986, now seen corresponding path program 46 times [2020-10-13 10:48:20,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:20,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698351833] [2020-10-13 10:48:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:20,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:22,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:22,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:48:22,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:22,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2122 [2020-10-13 10:48:22,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:22,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 10:48:22,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:22,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:48:22,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:24,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:24,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:24,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:24,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:24,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:24,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:24,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:24,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:24,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698351833] [2020-10-13 10:48:24,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:24,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 10:48:24,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487307591] [2020-10-13 10:48:24,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 10:48:24,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 10:48:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:48:24,346 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2020-10-13 10:48:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:25,834 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-13 10:48:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 10:48:25,835 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2020-10-13 10:48:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:25,836 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:48:25,836 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 10:48:25,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:48:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 10:48:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 10:48:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:48:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-13 10:48:25,839 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-13 10:48:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:25,840 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-13 10:48:25,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 10:48:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-13 10:48:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:48:25,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:25,840 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:25,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:48:25,841 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash -997119823, now seen corresponding path program 47 times [2020-10-13 10:48:25,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:25,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616910784] [2020-10-13 10:48:25,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:25,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:27,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:27,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:48:27,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:27,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1369 [2020-10-13 10:48:27,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:27,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 10:48:27,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:27,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:48:27,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:28,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:28,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:28,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:28,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:28,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:28,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:28,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:28,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:28,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:28,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:28,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:28,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616910784] [2020-10-13 10:48:28,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:28,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 10:48:28,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696607756] [2020-10-13 10:48:28,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 10:48:28,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:28,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 10:48:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:48:28,927 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2020-10-13 10:48:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:30,501 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-13 10:48:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 10:48:30,502 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2020-10-13 10:48:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:30,503 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:48:30,503 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:48:30,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:48:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:48:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 10:48:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:48:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-13 10:48:30,507 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-13 10:48:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:30,508 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-13 10:48:30,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 10:48:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-13 10:48:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:48:30,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:30,508 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:30,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:48:30,509 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:30,509 INFO L82 PathProgramCache]: Analyzing trace with hash -809482178, now seen corresponding path program 48 times [2020-10-13 10:48:30,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:30,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886448833] [2020-10-13 10:48:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:30,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:32,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:32,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:48:32,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:32,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1728 [2020-10-13 10:48:32,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:32,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 10:48:32,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:32,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:48:32,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:33,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:33,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:33,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:33,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:33,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:33,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:33,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:33,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:33,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:33,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:33,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:34,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886448833] [2020-10-13 10:48:34,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:34,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 10:48:34,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609658751] [2020-10-13 10:48:34,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 10:48:34,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 10:48:34,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:48:34,006 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2020-10-13 10:48:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:35,627 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-13 10:48:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 10:48:35,628 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2020-10-13 10:48:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:35,629 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:48:35,629 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:48:35,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:48:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:48:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 10:48:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:48:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-13 10:48:35,635 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-13 10:48:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:35,635 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-13 10:48:35,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 10:48:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-13 10:48:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:48:35,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:35,636 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:35,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:48:35,636 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:35,637 INFO L82 PathProgramCache]: Analyzing trace with hash 712317521, now seen corresponding path program 49 times [2020-10-13 10:48:35,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:35,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264591500] [2020-10-13 10:48:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:35,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:37,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:37,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 10:48:37,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:37,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1777 [2020-10-13 10:48:37,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:37,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 10:48:37,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:37,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:48:37,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:39,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:39,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:39,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:39,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:39,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:39,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:39,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:39,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:39,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:39,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:39,273 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 10:48:39,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264591500] [2020-10-13 10:48:39,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:39,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 10:48:39,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161953766] [2020-10-13 10:48:39,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 10:48:39,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:39,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 10:48:39,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:48:39,275 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2020-10-13 10:48:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:40,976 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-13 10:48:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 10:48:40,977 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2020-10-13 10:48:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:40,977 INFO L225 Difference]: With dead ends: 66 [2020-10-13 10:48:40,978 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 10:48:40,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:48:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 10:48:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 10:48:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:48:40,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-13 10:48:40,982 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-13 10:48:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:40,983 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-13 10:48:40,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 10:48:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-13 10:48:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:48:40,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:40,984 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:40,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:48:40,984 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:40,984 INFO L82 PathProgramCache]: Analyzing trace with hash 643467934, now seen corresponding path program 50 times [2020-10-13 10:48:40,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:40,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779725768] [2020-10-13 10:48:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:41,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:43,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:43,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:48:43,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:43,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2173 [2020-10-13 10:48:43,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:43,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 10:48:43,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:43,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:48:43,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:45,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:45,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:45,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:45,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:45,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:45,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:45,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779725768] [2020-10-13 10:48:45,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:45,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 10:48:45,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913662084] [2020-10-13 10:48:45,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 10:48:45,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 10:48:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:48:45,092 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2020-10-13 10:48:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:46,880 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-13 10:48:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 10:48:46,883 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2020-10-13 10:48:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:46,884 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:48:46,884 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:48:46,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:48:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:48:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-13 10:48:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:48:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-13 10:48:46,888 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-13 10:48:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:46,889 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-13 10:48:46,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 10:48:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-13 10:48:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:48:46,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:46,889 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:46,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:48:46,890 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:46,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1490869263, now seen corresponding path program 51 times [2020-10-13 10:48:46,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:46,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218083975] [2020-10-13 10:48:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:46,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:49,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:49,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:48:49,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2618 [2020-10-13 10:48:49,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 10:48:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:48:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:51,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:51,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:51,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:51,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:51,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:51,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:51,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:51,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:51,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:51,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:51,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:51,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218083975] [2020-10-13 10:48:51,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:51,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 10:48:51,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218814326] [2020-10-13 10:48:51,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 10:48:51,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 10:48:51,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:48:51,510 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2020-10-13 10:48:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:53,342 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-13 10:48:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 10:48:53,346 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2020-10-13 10:48:53,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:53,347 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:48:53,347 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:48:53,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:48:53,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:48:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-13 10:48:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:48:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-13 10:48:53,351 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-10-13 10:48:53,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:53,352 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-13 10:48:53,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 10:48:53,352 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-13 10:48:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:48:53,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:53,352 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:53,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:48:53,353 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1064154366, now seen corresponding path program 52 times [2020-10-13 10:48:53,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:53,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658497600] [2020-10-13 10:48:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:53,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:55,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:55,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:48:55,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:55,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2608 [2020-10-13 10:48:55,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 10:48:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:48:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:48:55,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:58,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:58,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:58,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:58,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:48:58,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:58,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:48:58,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:58,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:58,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658497600] [2020-10-13 10:48:58,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:58,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 10:48:58,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716270905] [2020-10-13 10:48:58,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 10:48:58,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 10:48:58,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:48:58,052 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2020-10-13 10:48:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:59,961 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-13 10:48:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 10:48:59,962 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2020-10-13 10:48:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:59,963 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:48:59,963 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:48:59,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:48:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:48:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 10:48:59,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 10:48:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-13 10:48:59,969 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2020-10-13 10:48:59,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:59,969 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-13 10:48:59,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 10:48:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-13 10:48:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:48:59,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:59,970 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:59,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:48:59,970 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:59,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:59,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1334491759, now seen corresponding path program 53 times [2020-10-13 10:48:59,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:59,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997612589] [2020-10-13 10:48:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:00,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:02,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:02,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:49:02,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:02,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2761 [2020-10-13 10:49:02,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:02,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 10:49:02,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:02,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:49:02,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:04,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:04,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:04,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:04,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:04,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:04,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:04,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:04,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:04,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:04,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:04,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997612589] [2020-10-13 10:49:04,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:04,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 10:49:04,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231235743] [2020-10-13 10:49:04,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 10:49:04,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:04,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 10:49:04,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:49:04,936 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2020-10-13 10:49:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:06,867 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-13 10:49:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 10:49:06,868 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2020-10-13 10:49:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:06,869 INFO L225 Difference]: With dead ends: 70 [2020-10-13 10:49:06,869 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:49:06,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:49:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:49:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 10:49:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:49:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-13 10:49:06,875 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2020-10-13 10:49:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:06,875 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-13 10:49:06,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 10:49:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-13 10:49:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:49:06,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:06,876 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:06,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:49:06,876 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:06,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:06,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1616889694, now seen corresponding path program 54 times [2020-10-13 10:49:06,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:06,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11021484] [2020-10-13 10:49:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:06,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:09,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:09,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:49:09,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:09,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2462 [2020-10-13 10:49:09,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:09,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 10:49:09,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:09,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:49:09,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:49:11,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:11,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:11,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:11,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:11,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:11,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:11,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:11,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:11,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:11,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:11,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:11,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11021484] [2020-10-13 10:49:11,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:11,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 10:49:11,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757969645] [2020-10-13 10:49:11,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 10:49:11,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:11,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 10:49:11,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:49:11,609 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2020-10-13 10:49:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:13,627 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-10-13 10:49:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 10:49:13,629 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2020-10-13 10:49:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:13,630 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:49:13,630 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:49:13,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:49:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:49:13,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 10:49:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:49:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-13 10:49:13,635 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2020-10-13 10:49:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:13,635 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-13 10:49:13,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 10:49:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-13 10:49:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:49:13,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:13,636 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:13,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:49:13,637 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1379565775, now seen corresponding path program 55 times [2020-10-13 10:49:13,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:13,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710271522] [2020-10-13 10:49:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:13,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:16,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:16,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:49:16,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:16,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3174 [2020-10-13 10:49:16,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:16,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 10:49:16,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:16,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:49:16,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:19,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:19,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:19,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:19,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:19,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:19,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:19,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:19,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:19,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:19,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:19,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:19,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710271522] [2020-10-13 10:49:19,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:19,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 10:49:19,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689464036] [2020-10-13 10:49:19,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 10:49:19,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:19,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 10:49:19,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:49:19,136 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2020-10-13 10:49:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:21,210 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-13 10:49:21,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 10:49:21,212 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2020-10-13 10:49:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:21,213 INFO L225 Difference]: With dead ends: 72 [2020-10-13 10:49:21,213 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:49:21,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:49:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:49:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 10:49:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:49:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-13 10:49:21,218 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2020-10-13 10:49:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:21,218 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-13 10:49:21,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 10:49:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-13 10:49:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:49:21,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:21,219 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:21,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:49:21,220 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:21,220 INFO L82 PathProgramCache]: Analyzing trace with hash 219595198, now seen corresponding path program 56 times [2020-10-13 10:49:21,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:21,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874866619] [2020-10-13 10:49:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:21,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:23,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:23,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:49:23,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:23,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2154 [2020-10-13 10:49:23,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:23,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 10:49:23,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:23,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:49:23,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:25,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:25,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:25,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:25,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:25,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:25,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:49:25,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:25,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:25,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:25,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:25,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:25,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874866619] [2020-10-13 10:49:25,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:25,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 10:49:25,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981962433] [2020-10-13 10:49:25,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 10:49:25,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 10:49:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:49:25,792 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2020-10-13 10:49:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:28,030 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-13 10:49:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 10:49:28,031 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2020-10-13 10:49:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:28,031 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:49:28,032 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:49:28,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:49:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:49:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-13 10:49:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:49:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-13 10:49:28,040 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2020-10-13 10:49:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:28,040 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-13 10:49:28,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 10:49:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-13 10:49:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:49:28,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:28,041 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:28,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:49:28,042 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:28,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1746022191, now seen corresponding path program 57 times [2020-10-13 10:49:28,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:28,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198890901] [2020-10-13 10:49:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:28,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:31,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:31,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:49:31,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:31,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3270 [2020-10-13 10:49:31,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:31,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 10:49:31,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:31,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:49:31,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:33,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:33,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:33,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:33,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:33,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:33,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:33,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:33,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:33,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198890901] [2020-10-13 10:49:33,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:33,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 10:49:33,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149359404] [2020-10-13 10:49:33,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 10:49:33,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:33,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 10:49:33,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:49:33,871 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2020-10-13 10:49:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:36,113 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-13 10:49:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 10:49:36,114 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2020-10-13 10:49:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:36,115 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:49:36,115 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 10:49:36,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:49:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 10:49:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-13 10:49:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:49:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-13 10:49:36,120 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2020-10-13 10:49:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:36,120 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-13 10:49:36,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 10:49:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-13 10:49:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:49:36,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:36,121 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:36,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:49:36,121 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1744348190, now seen corresponding path program 58 times [2020-10-13 10:49:36,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:36,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147114765] [2020-10-13 10:49:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:36,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:41,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:41,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:49:41,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:41,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 10:49:41,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:41,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 10:49:41,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:41,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:49:41,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:43,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:43,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:43,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:43,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:43,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:43,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:49:43,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:43,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:43,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147114765] [2020-10-13 10:49:43,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:43,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 10:49:43,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177123987] [2020-10-13 10:49:43,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 10:49:43,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:43,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 10:49:43,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:49:43,823 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2020-10-13 10:49:46,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:46,126 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-13 10:49:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 10:49:46,126 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2020-10-13 10:49:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:46,127 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:49:46,127 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 10:49:46,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:49:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 10:49:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 10:49:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:49:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-13 10:49:46,132 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2020-10-13 10:49:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:46,132 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-13 10:49:46,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 10:49:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-13 10:49:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:49:46,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:46,133 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:46,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:49:46,133 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1723319695, now seen corresponding path program 59 times [2020-10-13 10:49:46,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:46,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404628997] [2020-10-13 10:49:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:46,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:51,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:51,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:49:51,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:51,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:49:51,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:51,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 10:49:51,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:49:51,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:49:51,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:53,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:53,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:53,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:53,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:49:53,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:53,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:53,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:53,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:53,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:53,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:53,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:53,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404628997] [2020-10-13 10:49:53,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:53,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 10:49:53,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395693254] [2020-10-13 10:49:53,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 10:49:53,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 10:49:53,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:49:53,877 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2020-10-13 10:49:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:56,268 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-13 10:49:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 10:49:56,269 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2020-10-13 10:49:56,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:56,270 INFO L225 Difference]: With dead ends: 76 [2020-10-13 10:49:56,271 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:49:56,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:49:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:49:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 10:49:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 10:49:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-13 10:49:56,276 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2020-10-13 10:49:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:56,276 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-13 10:49:56,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 10:49:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-13 10:49:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:49:56,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:56,277 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:56,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 10:49:56,278 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1846841730, now seen corresponding path program 60 times [2020-10-13 10:49:56,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:56,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916695173] [2020-10-13 10:49:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:56,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:00,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:00,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:50:00,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:00,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4650 [2020-10-13 10:50:00,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:00,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 10:50:00,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:00,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:50:00,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:03,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:03,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:03,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:03,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:03,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:03,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:03,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:03,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:03,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916695173] [2020-10-13 10:50:03,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:03,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 10:50:03,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674503489] [2020-10-13 10:50:03,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 10:50:03,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 10:50:03,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:50:03,718 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2020-10-13 10:50:06,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:06,064 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-10-13 10:50:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 10:50:06,065 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2020-10-13 10:50:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:06,067 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:50:06,067 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:50:06,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:50:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:50:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-13 10:50:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:50:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-13 10:50:06,072 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2020-10-13 10:50:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:06,072 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-13 10:50:06,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 10:50:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-13 10:50:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:50:06,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:06,073 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:06,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 10:50:06,074 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:06,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:06,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1381057519, now seen corresponding path program 61 times [2020-10-13 10:50:06,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:06,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516880038] [2020-10-13 10:50:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:06,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:11,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:11,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:50:11,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:11,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:50:11,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:11,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 10:50:11,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:11,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:50:11,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:13,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:13,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:13,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:13,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:13,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:13,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:13,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:13,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:13,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:13,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:13,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516880038] [2020-10-13 10:50:13,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:13,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 10:50:13,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339460276] [2020-10-13 10:50:13,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 10:50:13,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 10:50:13,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:50:13,931 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2020-10-13 10:50:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:16,341 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-13 10:50:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 10:50:16,341 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2020-10-13 10:50:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:16,342 INFO L225 Difference]: With dead ends: 78 [2020-10-13 10:50:16,343 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:50:16,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:50:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:50:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-13 10:50:16,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:50:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-13 10:50:16,347 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2020-10-13 10:50:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:16,348 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-13 10:50:16,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 10:50:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-13 10:50:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:50:16,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:16,349 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:16,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 10:50:16,349 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:16,349 INFO L82 PathProgramCache]: Analyzing trace with hash 173351134, now seen corresponding path program 62 times [2020-10-13 10:50:16,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:16,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478326959] [2020-10-13 10:50:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:16,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:20,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:20,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:50:20,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:20,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4433 [2020-10-13 10:50:20,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 10:50:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:50:20,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:23,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:23,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:23,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:23,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:23,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:23,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:23,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:23,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:23,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:23,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478326959] [2020-10-13 10:50:23,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:23,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-13 10:50:23,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465668773] [2020-10-13 10:50:23,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-13 10:50:23,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:23,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-13 10:50:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:50:23,715 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2020-10-13 10:50:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:26,274 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-10-13 10:50:26,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 10:50:26,275 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2020-10-13 10:50:26,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:26,276 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:50:26,277 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:50:26,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:50:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:50:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-13 10:50:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 10:50:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-13 10:50:26,283 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2020-10-13 10:50:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:26,283 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-13 10:50:26,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-13 10:50:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-13 10:50:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 10:50:26,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:26,284 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:26,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 10:50:26,284 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1115379121, now seen corresponding path program 63 times [2020-10-13 10:50:26,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:26,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065625912] [2020-10-13 10:50:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:26,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:30,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:30,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:50:30,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:30,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4241 [2020-10-13 10:50:30,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:30,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-13 10:50:30,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:30,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:50:30,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:33,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:33,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:33,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:33,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:33,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:33,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:33,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:33,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:33,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:33,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:33,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:33,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065625912] [2020-10-13 10:50:33,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:33,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 10:50:33,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800500635] [2020-10-13 10:50:33,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 10:50:33,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:33,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 10:50:33,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:50:33,575 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2020-10-13 10:50:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:36,095 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-13 10:50:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 10:50:36,097 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2020-10-13 10:50:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:36,098 INFO L225 Difference]: With dead ends: 80 [2020-10-13 10:50:36,098 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 10:50:36,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:50:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 10:50:36,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-13 10:50:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:50:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-13 10:50:36,103 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2020-10-13 10:50:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:36,103 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-13 10:50:36,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 10:50:36,104 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-13 10:50:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:50:36,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:36,104 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:36,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 10:50:36,105 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:36,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:36,105 INFO L82 PathProgramCache]: Analyzing trace with hash 253475646, now seen corresponding path program 64 times [2020-10-13 10:50:36,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:36,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796051573] [2020-10-13 10:50:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:36,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:40,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:40,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:50:40,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:40,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4824 [2020-10-13 10:50:40,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:40,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-13 10:50:40,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:40,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:50:40,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:44,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:44,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:44,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:44,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:44,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:44,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:50:44,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:44,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:44,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796051573] [2020-10-13 10:50:44,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:44,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 10:50:44,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998714992] [2020-10-13 10:50:44,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 10:50:44,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:44,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 10:50:44,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:50:44,064 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2020-10-13 10:50:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:46,718 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-10-13 10:50:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-13 10:50:46,719 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2020-10-13 10:50:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:46,719 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:50:46,720 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 10:50:46,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:50:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 10:50:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 10:50:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:50:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-10-13 10:50:46,724 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2020-10-13 10:50:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:46,725 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-10-13 10:50:46,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-13 10:50:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-10-13 10:50:46,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:50:46,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:46,725 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:46,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 10:50:46,726 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:46,726 INFO L82 PathProgramCache]: Analyzing trace with hash -695728303, now seen corresponding path program 65 times [2020-10-13 10:50:46,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:46,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606720578] [2020-10-13 10:50:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:46,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:51,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:51,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:50:51,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:51,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4948 [2020-10-13 10:50:51,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:51,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-13 10:50:51,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:50:51,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:50:51,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:54,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:54,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:54,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:54,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:50:54,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:54,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:54,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:54,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:54,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:54,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:54,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:54,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606720578] [2020-10-13 10:50:54,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:54,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-13 10:50:54,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865428629] [2020-10-13 10:50:54,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-13 10:50:54,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:54,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-13 10:50:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4358, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 10:50:54,895 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2020-10-13 10:50:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:57,631 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-13 10:50:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 10:50:57,632 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2020-10-13 10:50:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:57,633 INFO L225 Difference]: With dead ends: 82 [2020-10-13 10:50:57,633 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 10:50:57,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=198, Invalid=4358, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 10:50:57,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 10:50:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-13 10:50:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:50:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-13 10:50:57,638 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2020-10-13 10:50:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:57,639 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-13 10:50:57,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-13 10:50:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-13 10:50:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:50:57,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:57,639 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:57,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-13 10:50:57,640 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:57,640 INFO L82 PathProgramCache]: Analyzing trace with hash -56279650, now seen corresponding path program 66 times [2020-10-13 10:50:57,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:57,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728127341] [2020-10-13 10:50:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:57,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking...