/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/ldv-regression/test25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:30:11,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:30:11,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:30:11,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:30:11,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:30:11,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:30:11,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:30:11,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:30:11,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:30:11,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:30:11,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:30:11,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:30:11,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:30:11,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:30:11,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:30:11,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:30:11,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:30:11,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:30:11,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:30:11,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:30:11,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:30:11,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:30:11,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:30:11,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:30:11,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:30:11,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:30:11,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:30:11,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:30:11,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:30:11,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:30:12,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:30:12,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:30:12,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:30:12,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:30:12,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:30:12,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:30:12,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:30:12,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:30:12,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:30:12,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:30:12,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:30:12,016 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 10:30:12,056 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:30:12,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:30:12,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:30:12,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:30:12,059 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:30:12,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:30:12,059 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:30:12,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:30:12,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:30:12,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:30:12,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:30:12,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:30:12,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:30:12,062 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:30:12,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:30:12,063 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:30:12,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:30:12,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:30:12,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:30:12,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:30:12,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:30:12,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:30:12,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:30:12,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:30:12,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:30:12,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:30:12,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:30:12,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:30:12,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:30:12,066 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 10:30:12,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:30:12,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:30:12,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:30:12,423 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:30:12,423 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:30:12,424 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-1.c [2020-10-13 10:30:12,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c49dfaa26/13646275ec7f41948fb709d25391b9c2/FLAGe35c64288 [2020-10-13 10:30:12,962 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:30:12,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-1.c [2020-10-13 10:30:12,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c49dfaa26/13646275ec7f41948fb709d25391b9c2/FLAGe35c64288 [2020-10-13 10:30:13,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c49dfaa26/13646275ec7f41948fb709d25391b9c2 [2020-10-13 10:30:13,373 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:30:13,375 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:30:13,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:30:13,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:30:13,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:30:13,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:30:13" (1/1) ... [2020-10-13 10:30:13,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c1a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13, skipping insertion in model container [2020-10-13 10:30:13,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:30:13" (1/1) ... [2020-10-13 10:30:13,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:30:13,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:30:13,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:30:13,606 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:30:13,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:30:13,644 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:30:13,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13 WrapperNode [2020-10-13 10:30:13,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:30:13,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:30:13,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:30:13,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:30:13,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13" (1/1) ... [2020-10-13 10:30:13,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13" (1/1) ... [2020-10-13 10:30:13,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13" (1/1) ... [2020-10-13 10:30:13,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13" (1/1) ... [2020-10-13 10:30:13,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13" (1/1) ... [2020-10-13 10:30:13,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13" (1/1) ... [2020-10-13 10:30:13,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13" (1/1) ... [2020-10-13 10:30:13,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:30:13,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:30:13,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:30:13,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:30:13,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13" (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 10:30:13,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:30:13,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:30:13,856 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-13 10:30:13,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:30:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:30:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:30:13,857 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 10:30:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:30:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:30:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:30:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:30:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:30:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:30:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:30:13,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:30:13,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:30:14,140 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:30:14,141 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 10:30:14,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:30:14 BoogieIcfgContainer [2020-10-13 10:30:14,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:30:14,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:30:14,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:30:14,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:30:14,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:30:13" (1/3) ... [2020-10-13 10:30:14,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ead824a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:30:14, skipping insertion in model container [2020-10-13 10:30:14,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:13" (2/3) ... [2020-10-13 10:30:14,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ead824a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:30:14, skipping insertion in model container [2020-10-13 10:30:14,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:30:14" (3/3) ... [2020-10-13 10:30:14,169 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-10-13 10:30:14,202 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:30:14,220 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:30:14,241 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:30:14,271 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:30:14,272 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:30:14,272 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:30:14,272 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:30:14,272 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:30:14,272 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:30:14,272 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:30:14,272 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:30:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 10:30:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:30:14,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:14,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:14,298 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2020-10-13 10:30:14,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:14,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609296501] [2020-10-13 10:30:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:14,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:14,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:14,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:14,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:30:14,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:14,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-13 10:30:14,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:14,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:14,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:30:14,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:14,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 10:30:14,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:14,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:14,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:14,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:14,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:14,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:30:14,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:14,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:14,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:30:14,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-13 10:30:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:14,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:14,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:14,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:14,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:14,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 10:30:14,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:14,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:14,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:14,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:14,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:30:14,833 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 10:30:14,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609296501] [2020-10-13 10:30:14,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:30:14,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:30:14,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033648113] [2020-10-13 10:30:14,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:30:14,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:30:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:30:14,867 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-13 10:30:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:14,960 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-10-13 10:30:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:30:14,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 10:30:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:14,973 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:30:14,973 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 10:30:14,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 10:30:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 10:30:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 10:30:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:30:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 10:30:15,019 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-13 10:30:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:15,020 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 10:30:15,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:30:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 10:30:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:30:15,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:15,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:15,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:30:15,022 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:15,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:15,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2020-10-13 10:30:15,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:15,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799031053] [2020-10-13 10:30:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:15,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:15,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:15,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:15,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:30:15,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:15,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-13 10:30:15,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:15,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:30:15,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:15,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:30:15,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:30:15,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:15,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:15,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:15,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:15,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:15,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:30:15,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:15,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:15,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:30:15,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:30:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:15,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:15,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:15,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:15,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:15,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:30:15,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:15,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:15,486 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 10:30:15,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799031053] [2020-10-13 10:30:15,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:30:15,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:30:15,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073398686] [2020-10-13 10:30:15,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:30:15,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:30:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:30:15,490 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-10-13 10:30:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:15,547 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-13 10:30:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:30:15,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-13 10:30:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:15,549 INFO L225 Difference]: With dead ends: 34 [2020-10-13 10:30:15,549 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:30:15,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:30:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:30:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-13 10:30:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:30:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 10:30:15,558 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-13 10:30:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:15,558 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 10:30:15,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:30:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 10:30:15,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:30:15,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:15,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:15,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:30:15,560 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:15,560 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2020-10-13 10:30:15,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:15,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345427] [2020-10-13 10:30:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:15,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:15,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:15,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:15,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:30:15,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:15,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-13 10:30:15,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:15,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:30:15,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:15,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:30:15,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:15,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:15,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:15,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:15,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:15,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:15,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:30:15,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:15,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:15,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:15,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:15,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:15,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 10:30:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:15,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:15,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:15,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:15,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:15,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:30:15,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:15,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:15,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:15,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:15,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:15,939 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 10:30:15,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345427] [2020-10-13 10:30:15,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:15,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:30:15,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985944828] [2020-10-13 10:30:15,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:30:15,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:15,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:30:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:30:15,942 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-13 10:30:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:16,005 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-13 10:30:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:30:16,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 10:30:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:16,007 INFO L225 Difference]: With dead ends: 36 [2020-10-13 10:30:16,007 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:30:16,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:30:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:30:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-13 10:30:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:30:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-13 10:30:16,014 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-13 10:30:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:16,014 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-13 10:30:16,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:30:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-13 10:30:16,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:30:16,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:16,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:16,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:30:16,016 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:16,016 INFO L82 PathProgramCache]: Analyzing trace with hash -9513713, now seen corresponding path program 2 times [2020-10-13 10:30:16,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:16,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149605349] [2020-10-13 10:30:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:16,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:16,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:16,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:16,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:30:16,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:16,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-13 10:30:16,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:16,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:30:16,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:30:16,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:30:16,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:30:16,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:16,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:16,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:16,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:16,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:16,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:30:16,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:16,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:16,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:16,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:30:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:16,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:16,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:16,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:16,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:16,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:30:16,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:16,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:16,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:16,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:16,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:30:16,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149605349] [2020-10-13 10:30:16,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:30:16,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:30:16,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032338872] [2020-10-13 10:30:16,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:30:16,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:16,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:30:16,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:30:16,597 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-10-13 10:30:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:16,684 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-10-13 10:30:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:30:16,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 10:30:16,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:16,685 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:30:16,685 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:30:16,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:30:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:30:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 10:30:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:30:16,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-13 10:30:16,691 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-13 10:30:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:16,692 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-13 10:30:16,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:30:16,692 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-13 10:30:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:30:16,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:16,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:16,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:30:16,694 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:16,694 INFO L82 PathProgramCache]: Analyzing trace with hash -413303094, now seen corresponding path program 1 times [2020-10-13 10:30:16,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:16,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646071407] [2020-10-13 10:30:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:16,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:16,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:17,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:17,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:30:17,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:17,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-13 10:30:17,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:17,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:30:17,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:17,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:30:17,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:17,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:17,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:17,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:17,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:17,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:17,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:30:17,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:17,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:17,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:17,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:17,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:17,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 10:30:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:17,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:17,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:17,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:17,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:17,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:30:17,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:17,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:30:17,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646071407] [2020-10-13 10:30:17,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:17,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:30:17,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258369709] [2020-10-13 10:30:17,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:30:17,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:17,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:30:17,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:30:17,223 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-10-13 10:30:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:17,298 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-13 10:30:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:30:17,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 10:30:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:17,300 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:30:17,300 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 10:30:17,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:30:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 10:30:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 10:30:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:30:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-13 10:30:17,306 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-13 10:30:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:17,307 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-13 10:30:17,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:30:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-13 10:30:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:30:17,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:17,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:17,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:30:17,309 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash -50594516, now seen corresponding path program 2 times [2020-10-13 10:30:17,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:17,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493540777] [2020-10-13 10:30:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:17,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:17,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:18,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:18,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:30:18,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:18,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-13 10:30:18,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:18,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:30:18,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:30:18,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:30:18,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:30:18,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:18,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:18,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:18,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:18,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:18,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:30:18,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:18,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:18,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:18,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:30:18,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 10:30:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:18,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:18,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:18,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:18,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:18,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:30:18,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:18,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:18,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:18,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:18,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:30:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:30:18,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493540777] [2020-10-13 10:30:18,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:18,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:30:18,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587612516] [2020-10-13 10:30:18,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:30:18,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:18,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:30:18,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:30:18,436 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-10-13 10:30:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:18,595 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-13 10:30:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:30:18,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 10:30:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:18,598 INFO L225 Difference]: With dead ends: 37 [2020-10-13 10:30:18,598 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:30:18,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:30:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:30:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 10:30:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:30:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-13 10:30:18,614 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-13 10:30:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:18,615 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-13 10:30:18,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:30:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-13 10:30:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:30:18,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:18,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:18,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:30:18,616 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:18,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:18,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1237249113, now seen corresponding path program 3 times [2020-10-13 10:30:18,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:18,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574709134] [2020-10-13 10:30:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:18,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:18,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:19,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:19,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:30:19,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:19,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 946 [2020-10-13 10:30:19,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:19,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:30:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:30:19,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:19,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:19,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:19,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:19,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:19,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:19,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:30:19,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:19,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:19,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:19,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:19,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:19,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 10:30:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:19,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:19,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:19,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:19,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:19,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:30:19,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:19,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:30:19,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574709134] [2020-10-13 10:30:19,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:19,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:30:19,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675718311] [2020-10-13 10:30:19,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:30:19,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:19,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:30:19,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:30:19,666 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-10-13 10:30:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:19,738 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-13 10:30:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:30:19,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 10:30:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:19,739 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:30:19,739 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:30:19,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:30:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:30:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 10:30:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:30:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-13 10:30:19,745 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-13 10:30:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:19,746 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-13 10:30:19,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:30:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-13 10:30:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:30:19,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:19,747 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:19,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:30:19,747 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:19,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:19,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1042968311, now seen corresponding path program 4 times [2020-10-13 10:30:19,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:19,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120504647] [2020-10-13 10:30:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:19,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:19,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:20,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:20,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:30:20,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:20,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-13 10:30:20,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:20,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:30:20,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:30:20,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:30:20,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:20,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:20,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:20,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:20,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:20,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:20,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:30:20,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:20,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:30:20,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 10:30:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:20,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:20,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:20,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:20,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:20,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:30:20,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:20,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:20,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:20,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:20,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:30:20,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120504647] [2020-10-13 10:30:20,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:20,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:30:20,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400420389] [2020-10-13 10:30:20,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:30:20,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:30:20,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:30:20,983 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2020-10-13 10:30:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:21,123 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-10-13 10:30:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:30:21,123 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:30:21,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:21,124 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:30:21,124 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 10:30:21,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:30:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 10:30:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 10:30:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:30:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-13 10:30:21,130 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-13 10:30:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:21,130 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-13 10:30:21,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:30:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-13 10:30:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:30:21,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:21,131 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:21,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:30:21,132 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:21,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1425726396, now seen corresponding path program 5 times [2020-10-13 10:30:21,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:21,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421923224] [2020-10-13 10:30:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:21,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:21,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:22,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:22,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:30:22,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:22,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1329 [2020-10-13 10:30:22,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:22,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:30:22,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:22,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:30:22,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:22,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:22,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:22,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:22,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:22,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:22,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:22,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:22,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:22,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:22,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:22,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:22,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 10:30:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:22,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:22,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:22,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:22,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:22,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:30:22,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:22,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:22,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:30:22,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421923224] [2020-10-13 10:30:22,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:22,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:30:22,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437308290] [2020-10-13 10:30:22,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:30:22,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:30:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:30:22,549 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-10-13 10:30:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:22,631 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-13 10:30:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:30:22,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 10:30:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:22,633 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:30:22,633 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:30:22,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:30:22,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:30:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 10:30:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:30:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-13 10:30:22,641 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-13 10:30:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:22,641 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-13 10:30:22,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:30:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-13 10:30:22,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:30:22,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:22,644 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:22,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:30:22,645 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:22,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:22,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1283972954, now seen corresponding path program 6 times [2020-10-13 10:30:22,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:22,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001024228] [2020-10-13 10:30:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:22,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:22,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:24,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:24,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:30:24,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:24,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1618 [2020-10-13 10:30:24,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:30:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:30:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:30:24,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:24,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:24,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:24,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:24,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:24,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:24,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:24,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:24,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:24,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:24,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:24,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:24,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 10:30:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:24,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:24,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:24,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:24,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:24,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:30:24,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:24,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 10:30:24,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001024228] [2020-10-13 10:30:24,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:24,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:30:24,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605641840] [2020-10-13 10:30:24,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:30:24,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:24,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:30:24,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:30:24,391 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 9 states. [2020-10-13 10:30:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:24,536 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-10-13 10:30:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:30:24,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-13 10:30:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:24,538 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:30:24,538 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:30:24,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:30:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:30:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 10:30:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:30:24,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-13 10:30:24,544 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-13 10:30:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:24,544 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-13 10:30:24,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:30:24,544 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-13 10:30:24,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:30:24,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:24,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:24,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:30:24,546 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1102954335, now seen corresponding path program 7 times [2020-10-13 10:30:24,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:24,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7207118] [2020-10-13 10:30:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:24,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:24,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:26,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:26,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:30:26,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:26,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1941 [2020-10-13 10:30:26,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:26,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:30:26,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:26,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:30:26,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:26,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:26,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:26,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:26,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:26,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:26,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:26,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:26,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:26,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 10:30:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:26,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:26,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:26,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:26,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:26,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:30:26,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:26,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:26,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:26,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:26,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 10:30:26,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7207118] [2020-10-13 10:30:26,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:26,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:30:26,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247118496] [2020-10-13 10:30:26,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:30:26,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:26,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:30:26,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:30:26,594 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2020-10-13 10:30:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:26,680 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-13 10:30:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:30:26,681 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 10:30:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:26,681 INFO L225 Difference]: With dead ends: 60 [2020-10-13 10:30:26,681 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:30:26,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:30:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:30:26,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 10:30:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:30:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-13 10:30:26,691 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-13 10:30:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:26,691 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-13 10:30:26,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:30:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-13 10:30:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:30:26,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:26,694 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:26,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:30:26,695 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash 574372867, now seen corresponding path program 8 times [2020-10-13 10:30:26,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:26,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346069720] [2020-10-13 10:30:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:26,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:26,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:29,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:29,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:30:29,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:29,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2369 [2020-10-13 10:30:29,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:29,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:30:29,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:30:29,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:30:29,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:29,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:29,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:29,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:29,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:29,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:29,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:29,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:29,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:29,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:29,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:30:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:29,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:29,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:29,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:29,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:29,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:29,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:29,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:29,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:29,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:30:29,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346069720] [2020-10-13 10:30:29,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:29,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:30:29,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779755799] [2020-10-13 10:30:29,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:30:29,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:30:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:30:29,204 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 10 states. [2020-10-13 10:30:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:29,372 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-13 10:30:29,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:30:29,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 10:30:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:29,374 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:30:29,374 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:30:29,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:30:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:30:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 10:30:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:30:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-13 10:30:29,383 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-13 10:30:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:29,383 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-13 10:30:29,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:30:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-13 10:30:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:30:29,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:29,385 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:29,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:30:29,386 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1939015490, now seen corresponding path program 9 times [2020-10-13 10:30:29,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:29,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021101178] [2020-10-13 10:30:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:29,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:31,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:31,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:30:31,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:31,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2318 [2020-10-13 10:30:31,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:30:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:30:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:30:31,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:31,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:31,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:31,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:31,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:31,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:31,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:31,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:31,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:31,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 10:30:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:31,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:31,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:31,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:31,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:31,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:31,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:31,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:31,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:31,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:31,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:30:31,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021101178] [2020-10-13 10:30:31,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:31,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:30:31,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876887065] [2020-10-13 10:30:31,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:30:31,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:30:31,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:30:31,854 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 11 states. [2020-10-13 10:30:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:32,032 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-10-13 10:30:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:30:32,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-13 10:30:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:32,034 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:30:32,034 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:30:32,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:30:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:30:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 10:30:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:30:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-13 10:30:32,041 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-13 10:30:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:32,042 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-13 10:30:32,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:30:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-13 10:30:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:30:32,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:32,047 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:32,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:30:32,050 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:32,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:32,051 INFO L82 PathProgramCache]: Analyzing trace with hash 761361081, now seen corresponding path program 10 times [2020-10-13 10:30:32,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:32,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50965635] [2020-10-13 10:30:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:32,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:32,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:34,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:34,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:30:34,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:34,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2709 [2020-10-13 10:30:34,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:34,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:30:34,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:34,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:30:34,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:34,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:34,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:34,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:34,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:34,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:30:34,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:34,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:34,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 10:30:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:34,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:34,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:34,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:34,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:34,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:34,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:34,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:34,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:34,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:34,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 10:30:34,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50965635] [2020-10-13 10:30:34,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:34,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:30:34,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611055155] [2020-10-13 10:30:34,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:30:34,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:34,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:30:34,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:30:34,876 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 10 states. [2020-10-13 10:30:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:34,969 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-13 10:30:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:30:34,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 10:30:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:34,971 INFO L225 Difference]: With dead ends: 70 [2020-10-13 10:30:34,971 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:30:34,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:30:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:30:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 10:30:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:30:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-13 10:30:34,977 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-13 10:30:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:34,977 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-13 10:30:34,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:30:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-13 10:30:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:30:34,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:34,979 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:34,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:30:34,979 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:34,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:34,979 INFO L82 PathProgramCache]: Analyzing trace with hash -287974245, now seen corresponding path program 11 times [2020-10-13 10:30:34,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:34,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441707207] [2020-10-13 10:30:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:35,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:35,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:38,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:38,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:30:38,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:38,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3168 [2020-10-13 10:30:38,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:38,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:30:38,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:38,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:30:38,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:38,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:38,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:38,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:38,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:38,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:38,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:38,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:38,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:38,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:38,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:38,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:38,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 10:30:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:38,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:38,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:38,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:38,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:38,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:30:38,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:38,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:38,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:30:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 10:30:38,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441707207] [2020-10-13 10:30:38,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:38,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:30:38,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465780566] [2020-10-13 10:30:38,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:30:38,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:38,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:30:38,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:30:38,272 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 11 states. [2020-10-13 10:30:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:38,357 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-13 10:30:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:30:38,358 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 10:30:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:38,359 INFO L225 Difference]: With dead ends: 72 [2020-10-13 10:30:38,359 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 10:30:38,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:30:38,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 10:30:38,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-13 10:30:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:30:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-13 10:30:38,364 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-13 10:30:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:38,364 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-13 10:30:38,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:30:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-13 10:30:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:30:38,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:38,365 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:38,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:30:38,365 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:38,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:38,366 INFO L82 PathProgramCache]: Analyzing trace with hash 618092029, now seen corresponding path program 12 times [2020-10-13 10:30:38,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:38,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497676391] [2020-10-13 10:30:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:38,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:38,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:41,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:41,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:30:41,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:41,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3012 [2020-10-13 10:30:41,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:41,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:30:41,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:30:41,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:30:41,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:41,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:41,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:41,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:41,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:41,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:41,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:41,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:41,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 10:30:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:41,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:41,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:41,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:41,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:41,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:41,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:41,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:41,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 10:30:41,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497676391] [2020-10-13 10:30:41,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:41,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:30:41,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371255139] [2020-10-13 10:30:41,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:30:41,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:41,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:30:41,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:30:41,510 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 12 states. [2020-10-13 10:30:41,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:41,688 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-10-13 10:30:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:30:41,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 10:30:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:41,689 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:30:41,690 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:30:41,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:30:41,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:30:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 10:30:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:30:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-13 10:30:41,695 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-13 10:30:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:41,695 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-13 10:30:41,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:30:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-13 10:30:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:30:41,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:41,696 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:41,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:30:41,697 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1420393528, now seen corresponding path program 13 times [2020-10-13 10:30:41,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:41,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809919330] [2020-10-13 10:30:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:41,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:41,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:44,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:44,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:30:44,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3204 [2020-10-13 10:30:44,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:30:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:30:44,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:30:44,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:45,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:45,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:45,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:45,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:45,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:45,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:45,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:45,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:45,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:45,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:45,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:45,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 10:30:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:45,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:45,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:45,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:45,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:45,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:45,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:45,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:45,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:45,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 10:30:45,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809919330] [2020-10-13 10:30:45,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:45,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:30:45,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698204688] [2020-10-13 10:30:45,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:30:45,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:45,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:30:45,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:30:45,096 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 13 states. [2020-10-13 10:30:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:45,272 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-10-13 10:30:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:30:45,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-13 10:30:45,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:45,274 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:30:45,274 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 10:30:45,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:30:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 10:30:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 10:30:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:30:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-13 10:30:45,281 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-13 10:30:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:45,283 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-13 10:30:45,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:30:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-13 10:30:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:30:45,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:45,283 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:45,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:30:45,284 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -661979213, now seen corresponding path program 14 times [2020-10-13 10:30:45,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:45,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146154581] [2020-10-13 10:30:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:45,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:45,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:48,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:48,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:30:48,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:48,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3017 [2020-10-13 10:30:48,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:48,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:30:48,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:48,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:30:48,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:48,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:48,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:48,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:48,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:48,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:48,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:48,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:48,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:48,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:48,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:48,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:48,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 10:30:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:48,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:48,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:48,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:48,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:48,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:48,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:48,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:48,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:48,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:48,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 10:30:48,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146154581] [2020-10-13 10:30:48,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:48,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:30:48,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51876367] [2020-10-13 10:30:48,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:30:48,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:48,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:30:48,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:30:48,429 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 12 states. [2020-10-13 10:30:48,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:48,526 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-13 10:30:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:30:48,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 10:30:48,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:48,527 INFO L225 Difference]: With dead ends: 82 [2020-10-13 10:30:48,527 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:30:48,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:30:48,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:30:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 10:30:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:30:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-13 10:30:48,532 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-13 10:30:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:48,533 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-13 10:30:48,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:30:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-13 10:30:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:30:48,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:48,534 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:48,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:30:48,534 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash -605001835, now seen corresponding path program 15 times [2020-10-13 10:30:48,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:48,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504546418] [2020-10-13 10:30:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:48,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:48,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:52,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:52,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:30:52,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:30:52,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3950 [2020-10-13 10:30:52,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:30:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:30:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:30:52,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:52,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:52,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:52,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:52,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:52,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:52,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:52,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:52,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:52,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 10:30:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:52,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:52,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:52,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:52,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:52,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:52,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:52,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:52,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:52,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:52,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 10:30:52,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504546418] [2020-10-13 10:30:52,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:52,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:30:52,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947278810] [2020-10-13 10:30:52,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:30:52,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:30:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:30:52,604 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 13 states. [2020-10-13 10:30:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:52,710 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-13 10:30:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:30:52,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-13 10:30:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:52,712 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:30:52,712 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:30:52,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:30:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:30:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 10:30:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:30:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 10:30:52,725 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-13 10:30:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:52,725 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 10:30:52,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:30:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 10:30:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:30:52,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:52,727 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:52,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:30:52,727 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:52,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1684316425, now seen corresponding path program 16 times [2020-10-13 10:30:52,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:52,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069013280] [2020-10-13 10:30:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:52,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:53,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:53,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:30:53,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:53,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-13 10:30:53,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:53,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:30:53,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 10:30:53,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:30:53,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:53,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:53,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:53,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:53,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:53,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:53,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:53,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:53,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:53,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:53,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:53,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:53,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 10:30:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:53,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:53,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:53,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:53,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:53,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:53,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:53,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:53,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:53,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:53,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 10:30:53,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069013280] [2020-10-13 10:30:53,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:53,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:30:53,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635680415] [2020-10-13 10:30:53,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:30:53,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:53,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:30:53,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:30:53,765 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 14 states. [2020-10-13 10:30:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:54,019 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-10-13 10:30:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:30:54,019 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 10:30:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:54,020 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:30:54,020 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:30:54,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:30:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:30:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-13 10:30:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:30:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-13 10:30:54,025 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-13 10:30:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:54,025 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-13 10:30:54,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:30:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-13 10:30:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:30:54,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:54,026 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:54,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:30:54,027 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:54,027 INFO L82 PathProgramCache]: Analyzing trace with hash 714026674, now seen corresponding path program 17 times [2020-10-13 10:30:54,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:54,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395745542] [2020-10-13 10:30:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:54,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:55,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:55,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:30:55,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:55,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1092 [2020-10-13 10:30:55,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:55,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:30:55,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 10:30:55,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:30:55,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:55,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:30:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:55,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:55,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:55,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:55,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:55,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:55,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:55,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:55,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:30:55,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:55,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:55,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 10:30:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:30:55,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:30:55,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:30:55,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:30:55,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:30:55,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:30:55,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:30:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:30:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:30:55,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:30:55,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:30:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 10:30:55,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395745542] [2020-10-13 10:30:55,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:30:55,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:30:55,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960061956] [2020-10-13 10:30:55,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:30:55,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:30:55,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:30:55,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:30:55,408 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 15 states. [2020-10-13 10:30:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:30:55,670 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-13 10:30:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:30:55,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-10-13 10:30:55,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:30:55,671 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:30:55,671 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:30:55,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:30:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:30:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 10:30:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:30:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-13 10:30:55,682 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-13 10:30:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:30:55,682 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-13 10:30:55,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:30:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-13 10:30:55,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:30:55,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:30:55,683 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:30:55,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:30:55,684 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:30:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:30:55,688 INFO L82 PathProgramCache]: Analyzing trace with hash -875693139, now seen corresponding path program 18 times [2020-10-13 10:30:55,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:30:55,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122521609] [2020-10-13 10:30:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:30:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:30:55,719 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:30:55,719 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:30:55,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:30:55,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:30:55 BoogieIcfgContainer [2020-10-13 10:30:55,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:30:55,750 INFO L168 Benchmark]: Toolchain (without parser) took 42375.06 ms. Allocated memory was 141.0 MB in the beginning and 769.1 MB in the end (delta: 628.1 MB). Free memory was 104.3 MB in the beginning and 540.4 MB in the end (delta: -436.1 MB). Peak memory consumption was 192.0 MB. Max. memory is 7.1 GB. [2020-10-13 10:30:55,751 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:30:55,751 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.78 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 93.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-10-13 10:30:55,752 INFO L168 Benchmark]: Boogie Preprocessor took 144.55 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 181.3 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-10-13 10:30:55,752 INFO L168 Benchmark]: RCFGBuilder took 356.02 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 163.6 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:30:55,753 INFO L168 Benchmark]: TraceAbstraction took 41600.24 ms. Allocated memory was 203.9 MB in the beginning and 769.1 MB in the end (delta: 565.2 MB). Free memory was 162.9 MB in the beginning and 540.4 MB in the end (delta: -377.4 MB). Peak memory consumption was 187.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:30:55,756 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.78 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 93.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.55 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 181.3 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 356.02 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 163.6 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 41600.24 ms. Allocated memory was 203.9 MB in the beginning and 769.1 MB in the end (delta: 565.2 MB). Free memory was 162.9 MB in the beginning and 540.4 MB in the end (delta: -377.4 MB). Peak memory consumption was 187.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] struct cont cont; [L20] struct dummy array[10]; [L21] int i, *pa; [L22] i = __VERIFIER_nondet_int() [L24] int j = 0; [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND FALSE !(j < 10) [L29] COND TRUE i >= 0 && i < 9 [L30] cont.array = &array[i] [L31] EXPR cont.array [L31] pa = &cont.array[0].b [L32] EXPR cont.array [L32] EXPR cont.array[0].b [L32] COND TRUE cont.array[0].b > 0 [L33] EXPR array[i].b [L33] i = array[i].b - 10 [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND FALSE !(i < *pa) [L37] CALL, EXPR check(&cont, i) [L14] EXPR pc->array [L14] EXPR pc->array[1].b [L14] return pc->array[1].b == i; [L37] RET, EXPR check(&cont, i) [L37] COND TRUE !check(&cont, i) [L45] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 41.4s, OverallIterations: 22, TraceHistogramMax: 11, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 356 SDtfs, 152 SDslu, 1194 SDs, 0 SdLazy, 1184 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 37.6s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 86724 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 722/1337 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...