/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 SingleStatement --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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:18:52,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:18:52,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:18:52,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:18:52,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:18:52,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:18:52,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:18:52,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:18:52,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:18:52,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:18:52,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:18:52,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:18:52,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:18:52,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:18:52,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:18:52,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:18:52,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:18:52,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:18:52,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:18:52,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:18:52,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:18:52,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:18:52,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:18:52,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:18:52,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:18:52,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:18:52,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:18:52,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:18:52,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:18:52,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:18:52,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:18:52,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:18:52,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:18:52,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:18:52,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:18:52,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:18:52,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:18:52,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:18:52,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:18:52,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:18:52,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:18:52,947 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 [2020-09-25 02:18:52,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:18:52,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:18:53,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:18:53,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:18:53,000 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:18:53,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:18:53,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:18:53,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:18:53,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:18:53,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:18:53,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:18:53,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:18:53,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:18:53,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:18:53,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:18:53,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:18:53,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:18:53,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:18:53,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:18:53,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:18:53,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:18:53,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:18:53,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:18:53,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:18:53,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:18:53,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:18:53,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:18:53,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:18:53,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:18:53,007 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 -> SingleStatement 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; 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; 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; 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; 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; [2020-09-25 02:18:53,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:18:53,494 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:18:53,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:18:53,500 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:18:53,501 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:18:53,502 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-09-25 02:18:53,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2aed65832/dac3cfda9d9946f693f54398b267eea3/FLAGa4d33a459 [2020-09-25 02:18:54,164 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:18:54,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/heavy-2.c [2020-09-25 02:18:54,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2aed65832/dac3cfda9d9946f693f54398b267eea3/FLAGa4d33a459 [2020-09-25 02:18:54,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2aed65832/dac3cfda9d9946f693f54398b267eea3 [2020-09-25 02:18:54,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:18:54,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:18:54,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:18:54,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:18:54,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:18:54,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:18:54" (1/1) ... [2020-09-25 02:18:54,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19f5a534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:54, skipping insertion in model container [2020-09-25 02:18:54,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:18:54" (1/1) ... [2020-09-25 02:18:54,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:18:54,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:18:54,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:18:54,848 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:18:54,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:18:55,012 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:18:55,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55 WrapperNode [2020-09-25 02:18:55,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:18:55,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:18:55,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:18:55,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:18:55,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (1/1) ... [2020-09-25 02:18:55,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:18:55,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:18:55,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:18:55,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:18:55,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (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 [2020-09-25 02:18:55,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:18:55,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:18:55,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:18:55,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:18:55,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:18:55,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 02:18:55,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 02:18:55,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:18:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:18:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-09-25 02:18:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:18:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:18:55,527 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:18:55,528 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 02:18:55,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:18:55 BoogieIcfgContainer [2020-09-25 02:18:55,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:18:55,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:18:55,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:18:55,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:18:55,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:18:54" (1/3) ... [2020-09-25 02:18:55,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559c9d36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:18:55, skipping insertion in model container [2020-09-25 02:18:55,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:55" (2/3) ... [2020-09-25 02:18:55,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559c9d36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:18:55, skipping insertion in model container [2020-09-25 02:18:55,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:18:55" (3/3) ... [2020-09-25 02:18:55,544 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-09-25 02:18:55,556 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:18:55,566 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:18:55,590 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:18:55,623 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:18:55,623 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:18:55,623 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:18:55,624 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:18:55,624 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:18:55,624 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:18:55,624 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:18:55,624 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:18:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-09-25 02:18:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 02:18:55,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:55,653 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] [2020-09-25 02:18:55,654 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash 245897808, now seen corresponding path program 1 times [2020-09-25 02:18:55,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:55,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138014129] [2020-09-25 02:18:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:55,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:55,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:56,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:56,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 02:18:56,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:18:56,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-09-25 02:18:56,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 02:18:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:56,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:18:56,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:56,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:56,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:56,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:18:56,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:56,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 02:18:56,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:56,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:56,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:56,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:56,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:18:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:18:56,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138014129] [2020-09-25 02:18:56,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:18:56,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 02:18:56,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779886482] [2020-09-25 02:18:56,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 02:18:56,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:56,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 02:18:56,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:18:56,243 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-09-25 02:18:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:56,412 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-09-25 02:18:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 02:18:56,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-25 02:18:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:56,426 INFO L225 Difference]: With dead ends: 98 [2020-09-25 02:18:56,426 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 02:18:56,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:18:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 02:18:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-09-25 02:18:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-25 02:18:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-25 02:18:56,481 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 20 [2020-09-25 02:18:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:56,481 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-25 02:18:56,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 02:18:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-25 02:18:56,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 02:18:56,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:56,483 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] [2020-09-25 02:18:56,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:18:56,484 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:56,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:56,484 INFO L82 PathProgramCache]: Analyzing trace with hash 245856485, now seen corresponding path program 1 times [2020-09-25 02:18:56,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:56,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403880252] [2020-09-25 02:18:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:56,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:56,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:56,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:56,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 02:18:56,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:18:56,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-09-25 02:18:56,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:18:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 02:18:56,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 02:18:56,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:56,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:56,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:56,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:56,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:18:56,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:56,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 02:18:56,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:56,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:56,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:56,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:18:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:18:56,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403880252] [2020-09-25 02:18:56,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:18:56,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:18:56,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129452458] [2020-09-25 02:18:56,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:18:56,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:56,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:18:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:18:56,794 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2020-09-25 02:18:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:56,987 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-25 02:18:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:18:56,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-25 02:18:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:56,990 INFO L225 Difference]: With dead ends: 88 [2020-09-25 02:18:56,990 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 02:18:56,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:18:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 02:18:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 40. [2020-09-25 02:18:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 02:18:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-25 02:18:57,002 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2020-09-25 02:18:57,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:57,003 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-25 02:18:57,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:18:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-25 02:18:57,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 02:18:57,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:57,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:18:57,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:18:57,006 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:57,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:57,007 INFO L82 PathProgramCache]: Analyzing trace with hash 352436069, now seen corresponding path program 1 times [2020-09-25 02:18:57,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:57,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498232616] [2020-09-25 02:18:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:57,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:57,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 02:18:57,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:18:57,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-09-25 02:18:57,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:57,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:18:57,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 02:18:57,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 02:18:57,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:57,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:57,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:57,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:18:57,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:57,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 02:18:57,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:57,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:57,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:57,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:57,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:18:57,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498232616] [2020-09-25 02:18:57,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:18:57,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:18:57,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925905914] [2020-09-25 02:18:57,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:18:57,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:57,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:18:57,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:18:57,432 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 4 states. [2020-09-25 02:18:57,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:57,600 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-09-25 02:18:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:18:57,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-09-25 02:18:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:57,602 INFO L225 Difference]: With dead ends: 100 [2020-09-25 02:18:57,602 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 02:18:57,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:18:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 02:18:57,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 41. [2020-09-25 02:18:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-25 02:18:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-25 02:18:57,614 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 26 [2020-09-25 02:18:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:57,614 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-25 02:18:57,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:18:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-25 02:18:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 02:18:57,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:57,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:18:57,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:18:57,616 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:57,620 INFO L82 PathProgramCache]: Analyzing trace with hash -80258988, now seen corresponding path program 1 times [2020-09-25 02:18:57,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:57,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708826054] [2020-09-25 02:18:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:57,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:57,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:58,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:58,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 02:18:58,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:18:58,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-09-25 02:18:58,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:18:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:18:58,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 02:18:58,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:58,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:58,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:58,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:58,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:18:58,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:58,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 02:18:58,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:58,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:58,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:58,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:18:58,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708826054] [2020-09-25 02:18:58,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:18:58,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:18:58,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710952827] [2020-09-25 02:18:58,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:18:58,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:18:58,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:18:58,697 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-09-25 02:18:58,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:58,828 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-09-25 02:18:58,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:18:58,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-25 02:18:58,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:58,830 INFO L225 Difference]: With dead ends: 79 [2020-09-25 02:18:58,830 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 02:18:58,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:18:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 02:18:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-09-25 02:18:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 02:18:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-25 02:18:58,847 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2020-09-25 02:18:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:58,848 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-25 02:18:58,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:18:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-25 02:18:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 02:18:58,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:58,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:18:58,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:18:58,850 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:58,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1305862455, now seen corresponding path program 1 times [2020-09-25 02:18:58,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:58,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606919063] [2020-09-25 02:18:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:58,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:59,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:59,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:02,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 02:19:02,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:02,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3406 [2020-09-25 02:19:02,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 02:19:02,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:02,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:02,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:02,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:02,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:02,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 02:19:02,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:02,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:02,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606919063] [2020-09-25 02:19:02,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:02,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 02:19:02,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138466257] [2020-09-25 02:19:02,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:19:02,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:02,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:19:02,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:19:02,405 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 6 states. [2020-09-25 02:19:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:02,592 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-09-25 02:19:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 02:19:02,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-25 02:19:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:02,594 INFO L225 Difference]: With dead ends: 89 [2020-09-25 02:19:02,594 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 02:19:02,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:19:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 02:19:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-09-25 02:19:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 02:19:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-09-25 02:19:02,602 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 41 [2020-09-25 02:19:02,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:02,603 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-09-25 02:19:02,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:19:02,603 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-09-25 02:19:02,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 02:19:02,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:02,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:02,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:19:02,605 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:02,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:02,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1372608588, now seen corresponding path program 2 times [2020-09-25 02:19:02,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:02,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686342349] [2020-09-25 02:19:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:02,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:03,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:03,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 02:19:07,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:07,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 02:19:07,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:19:07,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:07,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 02:19:07,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:07,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:07,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:07,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 02:19:07,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:07,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:07,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:07,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:07,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686342349] [2020-09-25 02:19:07,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:07,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 02:19:07,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376590622] [2020-09-25 02:19:07,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:19:07,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:07,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:19:07,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:19:07,764 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 8 states. [2020-09-25 02:19:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:08,024 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-09-25 02:19:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 02:19:08,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-09-25 02:19:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:08,026 INFO L225 Difference]: With dead ends: 107 [2020-09-25 02:19:08,026 INFO L226 Difference]: Without dead ends: 74 [2020-09-25 02:19:08,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:19:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-25 02:19:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-09-25 02:19:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 02:19:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-09-25 02:19:08,046 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 50 [2020-09-25 02:19:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:08,047 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-09-25 02:19:08,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:19:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-09-25 02:19:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 02:19:08,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:08,051 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:08,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:19:08,051 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:08,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1219437097, now seen corresponding path program 3 times [2020-09-25 02:19:08,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:08,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973202760] [2020-09-25 02:19:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:08,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 02:19:13,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:13,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5197 [2020-09-25 02:19:13,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:19:13,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 02:19:13,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:13,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:13,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:13,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 02:19:13,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:13,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:13,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:13,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973202760] [2020-09-25 02:19:13,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:13,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:19:13,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427930487] [2020-09-25 02:19:13,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:19:13,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:13,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:19:13,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:19:13,485 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 10 states. [2020-09-25 02:19:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:13,836 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-09-25 02:19:13,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 02:19:13,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-25 02:19:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:13,838 INFO L225 Difference]: With dead ends: 125 [2020-09-25 02:19:13,838 INFO L226 Difference]: Without dead ends: 83 [2020-09-25 02:19:13,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-25 02:19:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-25 02:19:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2020-09-25 02:19:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 02:19:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-09-25 02:19:13,847 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 59 [2020-09-25 02:19:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:13,848 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-09-25 02:19:13,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:19:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-09-25 02:19:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 02:19:13,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:13,849 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:13,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:19:13,850 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:13,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:13,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1194778388, now seen corresponding path program 4 times [2020-09-25 02:19:13,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:13,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216325863] [2020-09-25 02:19:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:14,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:14,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:15,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:18,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:18,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 02:19:18,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:18,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-09-25 02:19:18,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:19:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 02:19:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:19,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:19,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:19,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:19,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:19,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:19,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:19:19,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:19,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:19,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:19,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216325863] [2020-09-25 02:19:19,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:19,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:19:19,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235734393] [2020-09-25 02:19:19,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:19:19,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:19,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:19:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:19:19,213 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 12 states. [2020-09-25 02:19:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:19,671 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-09-25 02:19:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 02:19:19,672 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-09-25 02:19:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:19,673 INFO L225 Difference]: With dead ends: 143 [2020-09-25 02:19:19,673 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 02:19:19,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-25 02:19:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 02:19:19,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2020-09-25 02:19:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 02:19:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-25 02:19:19,685 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-25 02:19:19,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:19,685 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-25 02:19:19,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:19:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-25 02:19:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-25 02:19:19,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:19,691 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:19,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:19:19,691 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:19,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:19,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1191054729, now seen corresponding path program 5 times [2020-09-25 02:19:19,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:19,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266641881] [2020-09-25 02:19:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:19,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:21,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:21,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:22,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:24,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:24,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 02:19:24,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:24,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-09-25 02:19:24,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:24,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 02:19:24,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:24,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 02:19:24,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:25,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:25,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:25,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:25,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:25,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:25,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:19:25,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:25,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:25,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:25,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:25,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:25,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266641881] [2020-09-25 02:19:25,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:25,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 02:19:25,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107117708] [2020-09-25 02:19:25,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 02:19:25,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:25,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 02:19:25,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-25 02:19:25,080 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 14 states. [2020-09-25 02:19:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:25,612 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-09-25 02:19:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 02:19:25,613 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-09-25 02:19:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:25,614 INFO L225 Difference]: With dead ends: 161 [2020-09-25 02:19:25,614 INFO L226 Difference]: Without dead ends: 101 [2020-09-25 02:19:25,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-09-25 02:19:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-25 02:19:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-09-25 02:19:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-25 02:19:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-09-25 02:19:25,629 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2020-09-25 02:19:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:25,630 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-09-25 02:19:25,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 02:19:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-09-25 02:19:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-25 02:19:25,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:25,633 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:25,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 02:19:25,634 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:25,634 INFO L82 PathProgramCache]: Analyzing trace with hash 123928180, now seen corresponding path program 6 times [2020-09-25 02:19:25,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:25,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702789857] [2020-09-25 02:19:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:25,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:27,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:28,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:29,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:30,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:30,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-25 02:19:30,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:30,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-09-25 02:19:30,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:30,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 02:19:30,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:30,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 02:19:30,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:31,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:31,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:31,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:31,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:31,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:31,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:19:31,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:31,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:31,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:31,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702789857] [2020-09-25 02:19:31,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:31,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 02:19:31,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437308290] [2020-09-25 02:19:31,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 02:19:31,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:31,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 02:19:31,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:19:31,043 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 16 states. [2020-09-25 02:19:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:31,758 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2020-09-25 02:19:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 02:19:31,759 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-09-25 02:19:31,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:31,760 INFO L225 Difference]: With dead ends: 179 [2020-09-25 02:19:31,761 INFO L226 Difference]: Without dead ends: 110 [2020-09-25 02:19:31,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-09-25 02:19:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-25 02:19:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-09-25 02:19:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 02:19:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-09-25 02:19:31,779 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 86 [2020-09-25 02:19:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:31,780 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-09-25 02:19:31,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 02:19:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-09-25 02:19:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-25 02:19:31,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:31,781 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:31,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 02:19:31,782 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash -359457001, now seen corresponding path program 7 times [2020-09-25 02:19:31,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:31,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096692637] [2020-09-25 02:19:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:31,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:35,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:35,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:36,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:36,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:36,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 02:19:36,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:36,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-09-25 02:19:36,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:36,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 02:19:36,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:36,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 02:19:36,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:37,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:37,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:37,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:37,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:37,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:37,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:19:37,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:37,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:37,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:37,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:37,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:37,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096692637] [2020-09-25 02:19:37,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:37,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 02:19:37,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440563138] [2020-09-25 02:19:37,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 02:19:37,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:37,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 02:19:37,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-09-25 02:19:37,204 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 18 states. [2020-09-25 02:19:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:38,097 INFO L93 Difference]: Finished difference Result 197 states and 202 transitions. [2020-09-25 02:19:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 02:19:38,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-09-25 02:19:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:38,098 INFO L225 Difference]: With dead ends: 197 [2020-09-25 02:19:38,098 INFO L226 Difference]: Without dead ends: 119 [2020-09-25 02:19:38,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 02:19:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-25 02:19:38,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2020-09-25 02:19:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-25 02:19:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-09-25 02:19:38,116 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-09-25 02:19:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:38,117 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-09-25 02:19:38,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 02:19:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-09-25 02:19:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 02:19:38,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:38,118 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:38,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 02:19:38,119 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:38,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:38,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1447691732, now seen corresponding path program 8 times [2020-09-25 02:19:38,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:38,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463910594] [2020-09-25 02:19:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:38,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking...