/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=HIGHLEXORDER --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 [2020-09-24 22:55:26,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:55:26,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:55:26,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:55:26,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:55:26,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:55:26,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:55:26,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:55:26,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:55:26,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:55:26,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:55:26,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:55:26,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:55:26,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:55:26,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:55:26,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:55:26,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:55:26,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:55:26,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:55:26,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:55:26,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:55:26,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:55:26,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:55:26,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:55:26,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:55:26,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:55:26,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:55:26,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:55:26,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:55:26,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:55:26,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:55:26,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:55:26,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:55:26,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:55:26,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:55:26,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:55:26,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:55:26,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:55:26,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:55:26,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:55:26,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:55:26,090 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 [2020-09-24 22:55:26,117 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:55:26,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:55:26,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:55:26,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:55:26,119 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:55:26,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:55:26,119 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:55:26,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:55:26,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:55:26,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:55:26,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:55:26,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:55:26,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:55:26,121 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:55:26,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:55:26,121 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:55:26,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:55:26,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:55:26,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:55:26,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:55:26,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:55:26,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:55:26,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:55:26,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:55:26,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:55:26,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:55:26,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:55:26,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:55:26,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:55:26,127 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:55:26,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:55:26,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:55:26,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:55:26,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:55:26,738 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:55:26,740 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-09-24 22:55:26,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d08cfa5ef/28d96dc2358f4ad686eec1daac647faa/FLAG8ace8dec6 [2020-09-24 22:55:27,422 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:55:27,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/heavy-2.c [2020-09-24 22:55:27,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d08cfa5ef/28d96dc2358f4ad686eec1daac647faa/FLAG8ace8dec6 [2020-09-24 22:55:27,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d08cfa5ef/28d96dc2358f4ad686eec1daac647faa [2020-09-24 22:55:27,732 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:55:27,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:55:27,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:27,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:55:27,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:55:27,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:27" (1/1) ... [2020-09-24 22:55:27,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4700e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:27, skipping insertion in model container [2020-09-24 22:55:27,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:55:27" (1/1) ... [2020-09-24 22:55:27,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:55:27,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:55:28,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:28,087 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:55:28,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:55:28,250 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:55:28,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28 WrapperNode [2020-09-24 22:55:28,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:55:28,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:55:28,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:55:28,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:55:28,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (1/1) ... [2020-09-24 22:55:28,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:55:28,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:55:28,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:55:28,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:55:28,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (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 [2020-09-24 22:55:28,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:55:28,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:55:28,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:55:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:55:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:55:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 22:55:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 22:55:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:55:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 22:55:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-09-24 22:55:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:55:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 22:55:28,654 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:55:28,654 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 22:55:28,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:28 BoogieIcfgContainer [2020-09-24 22:55:28,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:55:28,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:55:28,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:55:28,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:55:28,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:55:27" (1/3) ... [2020-09-24 22:55:28,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc10e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:28, skipping insertion in model container [2020-09-24 22:55:28,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:55:28" (2/3) ... [2020-09-24 22:55:28,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc10e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:55:28, skipping insertion in model container [2020-09-24 22:55:28,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:55:28" (3/3) ... [2020-09-24 22:55:28,672 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-09-24 22:55:28,688 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:55:28,699 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:55:28,726 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:55:28,762 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:55:28,762 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:55:28,762 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:55:28,763 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:55:28,763 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:55:28,763 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:55:28,763 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:55:28,763 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:55:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-09-24 22:55:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 22:55:28,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:28,800 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] [2020-09-24 22:55:28,800 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:28,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:28,808 INFO L82 PathProgramCache]: Analyzing trace with hash 245897808, now seen corresponding path program 1 times [2020-09-24 22:55:28,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:28,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345342670] [2020-09-24 22:55:28,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:28,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:29,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:29,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:29,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 22:55:29,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:29,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-09-24 22:55:29,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:29,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:29,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 22:55:29,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:29,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:55:29,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:29,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:29,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:29,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:55:29,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:29,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 22:55:29,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:29,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:29,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:29,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:29,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:29,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345342670] [2020-09-24 22:55:29,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:29,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 22:55:29,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561171287] [2020-09-24 22:55:29,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 22:55:29,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:29,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 22:55:29,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 22:55:29,375 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-09-24 22:55:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:29,569 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-09-24 22:55:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 22:55:29,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-24 22:55:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:29,583 INFO L225 Difference]: With dead ends: 98 [2020-09-24 22:55:29,583 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 22:55:29,593 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 [2020-09-24 22:55:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 22:55:29,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-09-24 22:55:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-24 22:55:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-24 22:55:29,638 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 20 [2020-09-24 22:55:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:29,638 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-24 22:55:29,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 22:55:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-24 22:55:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 22:55:29,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:29,639 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] [2020-09-24 22:55:29,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:55:29,640 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:29,640 INFO L82 PathProgramCache]: Analyzing trace with hash 245856485, now seen corresponding path program 1 times [2020-09-24 22:55:29,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:29,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856677469] [2020-09-24 22:55:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:29,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:29,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:29,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:29,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 22:55:29,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:55:29,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-09-24 22:55:29,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:29,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:55:29,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 22:55:29,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 22:55:29,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:29,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:29,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:29,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:29,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:55:29,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:29,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 22:55:29,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:29,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:29,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:29,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:29,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:29,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856677469] [2020-09-24 22:55:29,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:29,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:55:29,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695595245] [2020-09-24 22:55:29,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:55:29,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:29,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:55:29,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:55:29,937 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2020-09-24 22:55:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:30,186 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-24 22:55:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 22:55:30,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-24 22:55:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:30,192 INFO L225 Difference]: With dead ends: 88 [2020-09-24 22:55:30,192 INFO L226 Difference]: Without dead ends: 85 [2020-09-24 22:55:30,195 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 [2020-09-24 22:55:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-24 22:55:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 40. [2020-09-24 22:55:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 22:55:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-24 22:55:30,217 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2020-09-24 22:55:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:30,217 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-24 22:55:30,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:55:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-24 22:55:30,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 22:55:30,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:30,221 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] [2020-09-24 22:55:30,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:55:30,222 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:30,222 INFO L82 PathProgramCache]: Analyzing trace with hash 352436069, now seen corresponding path program 1 times [2020-09-24 22:55:30,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:30,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055298345] [2020-09-24 22:55:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:30,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:30,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:30,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:30,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:30,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 22:55:30,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:55:30,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-09-24 22:55:30,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:30,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:55:30,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 22:55:30,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 22:55:30,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:30,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:30,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:30,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:30,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:55:30,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:30,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 22:55:30,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:30,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:30,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:30,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:30,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055298345] [2020-09-24 22:55:30,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:30,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:55:30,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351333559] [2020-09-24 22:55:30,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:55:30,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:30,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:55:30,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:55:30,804 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 4 states. [2020-09-24 22:55:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:30,992 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-09-24 22:55:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 22:55:30,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-09-24 22:55:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:30,995 INFO L225 Difference]: With dead ends: 100 [2020-09-24 22:55:30,995 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 22:55:30,996 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 [2020-09-24 22:55:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 22:55:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 41. [2020-09-24 22:55:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 22:55:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-24 22:55:31,004 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 26 [2020-09-24 22:55:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:31,005 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-24 22:55:31,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:55:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-24 22:55:31,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 22:55:31,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:31,007 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] [2020-09-24 22:55:31,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:55:31,007 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:31,008 INFO L82 PathProgramCache]: Analyzing trace with hash -80258988, now seen corresponding path program 1 times [2020-09-24 22:55:31,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:31,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285933174] [2020-09-24 22:55:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:31,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:31,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:31,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:31,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:31,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 22:55:31,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:55:31,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 897 [2020-09-24 22:55:31,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:31,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:55:31,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 22:55:31,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 22:55:31,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:31,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:31,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:32,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:32,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:55:32,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:32,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 22:55:32,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:32,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:32,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:32,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285933174] [2020-09-24 22:55:32,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:55:32,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:55:32,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186212129] [2020-09-24 22:55:32,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:55:32,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:32,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:55:32,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:55:32,017 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-09-24 22:55:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:32,154 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-09-24 22:55:32,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 22:55:32,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-24 22:55:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:32,156 INFO L225 Difference]: With dead ends: 79 [2020-09-24 22:55:32,156 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 22:55:32,157 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 [2020-09-24 22:55:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 22:55:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-09-24 22:55:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 22:55:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-24 22:55:32,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2020-09-24 22:55:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:32,165 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-24 22:55:32,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:55:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-24 22:55:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 22:55:32,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:32,167 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] [2020-09-24 22:55:32,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:55:32,168 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:32,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1305862455, now seen corresponding path program 1 times [2020-09-24 22:55:32,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:32,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184050805] [2020-09-24 22:55:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:32,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:32,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:32,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:32,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:35,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 22:55:35,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:55:35,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3245 [2020-09-24 22:55:35,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:35,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:55:35,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 22:55:35,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 22:55:35,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:35,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:35,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:35,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:55:35,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:35,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 22:55:35,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:35,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:35,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:35,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:35,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:35,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184050805] [2020-09-24 22:55:35,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:35,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 22:55:35,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513957073] [2020-09-24 22:55:35,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 22:55:35,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:35,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 22:55:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:55:35,585 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 6 states. [2020-09-24 22:55:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:35,803 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-09-24 22:55:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 22:55:35,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-24 22:55:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:35,805 INFO L225 Difference]: With dead ends: 89 [2020-09-24 22:55:35,805 INFO L226 Difference]: Without dead ends: 65 [2020-09-24 22:55:35,806 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 [2020-09-24 22:55:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-24 22:55:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-09-24 22:55:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 22:55:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-09-24 22:55:35,821 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 41 [2020-09-24 22:55:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:35,822 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-09-24 22:55:35,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 22:55:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-09-24 22:55:35,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 22:55:35,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:35,826 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] [2020-09-24 22:55:35,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:55:35,827 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:35,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:35,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1372608588, now seen corresponding path program 2 times [2020-09-24 22:55:35,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:35,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232565241] [2020-09-24 22:55:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:35,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:35,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:37,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:37,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:40,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:40,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 22:55:40,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:55:40,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-24 22:55:40,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:40,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:55:40,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 22:55:40,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 22:55:40,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:41,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:41,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:55:41,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:41,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 22:55:41,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:41,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:41,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:41,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:41,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232565241] [2020-09-24 22:55:41,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:41,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 22:55:41,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910213406] [2020-09-24 22:55:41,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 22:55:41,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:41,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 22:55:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:55:41,061 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 8 states. [2020-09-24 22:55:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:41,431 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-09-24 22:55:41,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 22:55:41,432 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-09-24 22:55:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:41,433 INFO L225 Difference]: With dead ends: 107 [2020-09-24 22:55:41,433 INFO L226 Difference]: Without dead ends: 74 [2020-09-24 22:55:41,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-24 22:55:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-24 22:55:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-09-24 22:55:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 22:55:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-09-24 22:55:41,463 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 50 [2020-09-24 22:55:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:41,464 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-09-24 22:55:41,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 22:55:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-09-24 22:55:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 22:55:41,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:41,467 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] [2020-09-24 22:55:41,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 22:55:41,468 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1219437097, now seen corresponding path program 3 times [2020-09-24 22:55:41,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:41,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323246897] [2020-09-24 22:55:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:41,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:41,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:43,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:44,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:46,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:46,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 22:55:46,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:55:46,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5106 [2020-09-24 22:55:46,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:46,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:55:46,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 22:55:46,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 22:55:46,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:46,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:46,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:46,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:46,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:55:46,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:46,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 22:55:46,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:46,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:46,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:46,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323246897] [2020-09-24 22:55:46,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:46,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 22:55:46,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983473877] [2020-09-24 22:55:46,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 22:55:46,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:46,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 22:55:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:55:46,832 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 10 states. [2020-09-24 22:55:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:47,250 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-09-24 22:55:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 22:55:47,251 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-24 22:55:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:47,252 INFO L225 Difference]: With dead ends: 125 [2020-09-24 22:55:47,252 INFO L226 Difference]: Without dead ends: 83 [2020-09-24 22:55:47,253 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 [2020-09-24 22:55:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-24 22:55:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2020-09-24 22:55:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 22:55:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-09-24 22:55:47,261 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 59 [2020-09-24 22:55:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:47,262 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-09-24 22:55:47,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 22:55:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-09-24 22:55:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 22:55:47,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:47,263 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] [2020-09-24 22:55:47,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 22:55:47,264 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1194778388, now seen corresponding path program 4 times [2020-09-24 22:55:47,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:47,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188431477] [2020-09-24 22:55:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:47,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:48,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:48,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:48,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:52,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:52,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 22:55:52,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:55:52,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-09-24 22:55:52,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:52,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:55:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 22:55:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 22:55:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 22:55:52,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:52,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:52,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:52,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:55:52,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:52,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 22:55:52,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:52,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:52,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:52,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:52,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:52,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188431477] [2020-09-24 22:55:52,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:52,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 22:55:52,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381148842] [2020-09-24 22:55:52,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 22:55:52,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:52,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 22:55:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:55:52,727 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 12 states. [2020-09-24 22:55:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:53,229 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-09-24 22:55:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 22:55:53,230 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-09-24 22:55:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:53,231 INFO L225 Difference]: With dead ends: 143 [2020-09-24 22:55:53,231 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 22:55:53,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-24 22:55:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 22:55:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2020-09-24 22:55:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 22:55:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-24 22:55:53,254 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-24 22:55:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:53,257 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-24 22:55:53,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 22:55:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-24 22:55:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-24 22:55:53,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:53,259 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] [2020-09-24 22:55:53,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 22:55:53,260 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:53,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1191054729, now seen corresponding path program 5 times [2020-09-24 22:55:53,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:53,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106583058] [2020-09-24 22:55:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:53,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:54,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:55,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:55,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:58,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:58,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 22:55:58,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:55:58,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 22:55:58,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:58,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 22:55:58,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 22:55:58,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 22:55:58,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:55:58,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:55:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:58,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:55:58,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:55:58,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:55:58,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:55:58,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 22:55:58,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:55:58,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:55:58,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:55:58,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:55:58,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:55:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:55:58,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106583058] [2020-09-24 22:55:58,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:55:58,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 22:55:58,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331211356] [2020-09-24 22:55:58,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 22:55:58,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:55:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 22:55:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-24 22:55:58,599 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 14 states. [2020-09-24 22:55:59,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:55:59,169 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-09-24 22:55:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 22:55:59,170 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-09-24 22:55:59,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:55:59,171 INFO L225 Difference]: With dead ends: 161 [2020-09-24 22:55:59,171 INFO L226 Difference]: Without dead ends: 101 [2020-09-24 22:55:59,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-09-24 22:55:59,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-24 22:55:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-09-24 22:55:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-24 22:55:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-09-24 22:55:59,181 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2020-09-24 22:55:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:55:59,181 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-09-24 22:55:59,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 22:55:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-09-24 22:55:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 22:55:59,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:55:59,183 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] [2020-09-24 22:55:59,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 22:55:59,184 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:55:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:55:59,184 INFO L82 PathProgramCache]: Analyzing trace with hash 123928180, now seen corresponding path program 6 times [2020-09-24 22:55:59,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:55:59,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399392485] [2020-09-24 22:55:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:55:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:55:59,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:01,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:02,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:03,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:04,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:04,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-24 22:56:04,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:56:04,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-09-24 22:56:04,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 22:56:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 22:56:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 22:56:04,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:04,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:04,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:04,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:04,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:56:04,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:04,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 22:56:04,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:04,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:04,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:04,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:04,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399392485] [2020-09-24 22:56:04,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:04,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 22:56:04,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192682752] [2020-09-24 22:56:04,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 22:56:04,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:04,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 22:56:04,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-24 22:56:04,652 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 16 states. [2020-09-24 22:56:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:56:05,327 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2020-09-24 22:56:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 22:56:05,328 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-09-24 22:56:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:56:05,329 INFO L225 Difference]: With dead ends: 179 [2020-09-24 22:56:05,329 INFO L226 Difference]: Without dead ends: 110 [2020-09-24 22:56:05,330 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 [2020-09-24 22:56:05,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-24 22:56:05,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-09-24 22:56:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-24 22:56:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-09-24 22:56:05,338 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 86 [2020-09-24 22:56:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:56:05,338 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-09-24 22:56:05,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 22:56:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-09-24 22:56:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-24 22:56:05,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:56:05,340 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] [2020-09-24 22:56:05,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 22:56:05,340 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:56:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:56:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash -359457001, now seen corresponding path program 7 times [2020-09-24 22:56:05,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:56:05,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216311237] [2020-09-24 22:56:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:56:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:05,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:08,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:09,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:10,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:10,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:10,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 22:56:10,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:56:10,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-09-24 22:56:10,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 22:56:10,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 22:56:10,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-24 22:56:10,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:10,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:56:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:56:10,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:56:10,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:56:10,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 22:56:10,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:56:10,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 22:56:10,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:56:10,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:56:10,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:56:10,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:56:10,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:56:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:56:10,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216311237] [2020-09-24 22:56:10,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:56:10,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 22:56:10,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555203338] [2020-09-24 22:56:10,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 22:56:10,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:56:10,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 22:56:10,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-09-24 22:56:10,776 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 18 states.