/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=WIDEST --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/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:26:40,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:26:40,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:26:40,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:26:40,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:26:40,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:26:40,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:26:40,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:26:40,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:26:40,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:26:40,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:26:40,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:26:40,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:26:40,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:26:40,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:26:40,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:26:40,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:26:40,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:26:40,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:26:40,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:26:40,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:26:40,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:26:40,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:26:40,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:26:40,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:26:40,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:26:40,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:26:40,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:26:40,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:26:40,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:26:40,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:26:40,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:26:40,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:26:40,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:26:40,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:26:40,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:26:40,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:26:40,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:26:40,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:26:40,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:26:40,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:26:40,706 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 03:26:40,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:26:40,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:26:40,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:26:40,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:26:40,762 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:26:40,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:26:40,762 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:26:40,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:26:40,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:26:40,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:26:40,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:26:40,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:26:40,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:26:40,765 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:26:40,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:26:40,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:26:40,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:26:40,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:26:40,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:26:40,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:26:40,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:26:40,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:26:40,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:26:40,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:26:40,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:26:40,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:26:40,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:26:40,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:26:40,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:26:40,769 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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;log-additional-information=true; [2020-09-25 03:26:41,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:26:41,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:26:41,390 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:26:41,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:26:41,394 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:26:41,395 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 03:26:41,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dce31fedf/58b0f64ee5f74c17a9a1bcb2344876c3/FLAG75ab7f020 [2020-09-25 03:26:42,015 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:26:42,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 03:26:42,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dce31fedf/58b0f64ee5f74c17a9a1bcb2344876c3/FLAG75ab7f020 [2020-09-25 03:26:42,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dce31fedf/58b0f64ee5f74c17a9a1bcb2344876c3 [2020-09-25 03:26:42,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:26:42,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:26:42,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:26:42,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:26:42,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:26:42,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180772d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42, skipping insertion in model container [2020-09-25 03:26:42,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:26:42,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:26:42,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:26:42,676 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:26:42,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:26:42,711 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:26:42,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42 WrapperNode [2020-09-25 03:26:42,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:26:42,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:26:42,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:26:42,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:26:42,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... [2020-09-25 03:26:42,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:26:42,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:26:42,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:26:42,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:26:42,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:26:42,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:26:42,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:26:42,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:26:42,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:26:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:26:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:26:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 03:26:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:26:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:26:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:26:43,112 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:26:43,112 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 03:26:43,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:26:43 BoogieIcfgContainer [2020-09-25 03:26:43,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:26:43,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:26:43,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:26:43,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:26:43,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:26:42" (1/3) ... [2020-09-25 03:26:43,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6b2b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:26:43, skipping insertion in model container [2020-09-25 03:26:43,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:26:42" (2/3) ... [2020-09-25 03:26:43,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6b2b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:26:43, skipping insertion in model container [2020-09-25 03:26:43,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:26:43" (3/3) ... [2020-09-25 03:26:43,132 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-09-25 03:26:43,149 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:26:43,162 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:26:43,188 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:26:43,221 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:26:43,222 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:26:43,222 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:26:43,222 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:26:43,222 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:26:43,223 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:26:43,223 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:26:43,223 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:26:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 03:26:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 03:26:43,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:43,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:43,257 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:43,267 INFO L82 PathProgramCache]: Analyzing trace with hash 79158399, now seen corresponding path program 1 times [2020-09-25 03:26:43,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:43,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344416940] [2020-09-25 03:26:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:43,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:43,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 03:26:43,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:26:43,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-25 03:26:43,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:43,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:26:43,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:43,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 03:26:43,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:26:43,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:43,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:43,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:43,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:43,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:43,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 03:26:43,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:43,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:43,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:43,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:43,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:43,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344416940] [2020-09-25 03:26:43,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:26:43,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:26:43,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042340447] [2020-09-25 03:26:43,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:26:43,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:43,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:26:43,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:26:43,740 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-09-25 03:26:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:43,837 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-09-25 03:26:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 03:26:43,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-25 03:26:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:43,851 INFO L225 Difference]: With dead ends: 57 [2020-09-25 03:26:43,851 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 03:26:43,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:26:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 03:26:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 03:26:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 03:26:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 03:26:43,901 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2020-09-25 03:26:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:43,902 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 03:26:43,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:26:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 03:26:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 03:26:43,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:43,904 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] [2020-09-25 03:26:43,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:26:43,904 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash 268436001, now seen corresponding path program 1 times [2020-09-25 03:26:43,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:43,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838931071] [2020-09-25 03:26:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:43,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:44,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:44,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 03:26:44,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:44,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-09-25 03:26:44,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:44,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:26:44,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:44,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 03:26:44,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:44,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:44,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:44,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:44,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:44,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:26:44,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:44,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 03:26:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:44,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838931071] [2020-09-25 03:26:44,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:44,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 03:26:44,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683417519] [2020-09-25 03:26:44,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 03:26:44,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:44,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 03:26:44,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:26:44,724 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-09-25 03:26:45,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:45,009 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 03:26:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 03:26:45,009 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-09-25 03:26:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:45,013 INFO L225 Difference]: With dead ends: 60 [2020-09-25 03:26:45,014 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 03:26:45,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:26:45,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 03:26:45,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-25 03:26:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 03:26:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-09-25 03:26:45,026 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-09-25 03:26:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:45,026 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-09-25 03:26:45,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 03:26:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-09-25 03:26:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 03:26:45,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:45,028 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 03:26:45,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:26:45,029 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash -635017609, now seen corresponding path program 1 times [2020-09-25 03:26:45,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:45,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455904281] [2020-09-25 03:26:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:45,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:45,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 03:26:45,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:45,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-09-25 03:26:45,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 03:26:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:26:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 03:26:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:45,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:45,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:45,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:45,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:45,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:45,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:45,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:45,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:45,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:45,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:45,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455904281] [2020-09-25 03:26:45,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:45,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 03:26:45,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754053143] [2020-09-25 03:26:45,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:26:45,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:45,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:26:45,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:26:45,320 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-09-25 03:26:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:45,440 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-09-25 03:26:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 03:26:45,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-25 03:26:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:45,442 INFO L225 Difference]: With dead ends: 60 [2020-09-25 03:26:45,442 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 03:26:45,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:26:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 03:26:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-25 03:26:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 03:26:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-25 03:26:45,450 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-25 03:26:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:45,451 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-25 03:26:45,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:26:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-25 03:26:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 03:26:45,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:45,453 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] [2020-09-25 03:26:45,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:26:45,453 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:45,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1260601325, now seen corresponding path program 2 times [2020-09-25 03:26:45,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:45,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509914033] [2020-09-25 03:26:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:45,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:45,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:45,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 03:26:45,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:45,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-09-25 03:26:45,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 03:26:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 03:26:45,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 03:26:45,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:46,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:46,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:46,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:46,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:46,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:46,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:46,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:46,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:26:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:26:46,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509914033] [2020-09-25 03:26:46,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:46,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:26:46,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805296323] [2020-09-25 03:26:46,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:26:46,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:26:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:26:46,044 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-09-25 03:26:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:46,400 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-09-25 03:26:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 03:26:46,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-25 03:26:46,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:46,402 INFO L225 Difference]: With dead ends: 54 [2020-09-25 03:26:46,402 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 03:26:46,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 03:26:46,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 03:26:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-09-25 03:26:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 03:26:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-25 03:26:46,411 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2020-09-25 03:26:46,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:46,412 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-25 03:26:46,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:26:46,412 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-25 03:26:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 03:26:46,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:46,414 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:46,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:26:46,414 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1220208573, now seen corresponding path program 2 times [2020-09-25 03:26:46,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:46,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647952306] [2020-09-25 03:26:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:46,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:46,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:46,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 03:26:46,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:46,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-09-25 03:26:46,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:46,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 03:26:46,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:26:46,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 03:26:46,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:46,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:46,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:46,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:46,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:46,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:46,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:46,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:46,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:46,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647952306] [2020-09-25 03:26:46,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:46,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:26:46,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247909640] [2020-09-25 03:26:46,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:26:46,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:46,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:26:46,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:26:46,804 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-09-25 03:26:47,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:47,010 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-09-25 03:26:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 03:26:47,011 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-09-25 03:26:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:47,012 INFO L225 Difference]: With dead ends: 70 [2020-09-25 03:26:47,012 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 03:26:47,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-25 03:26:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 03:26:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-09-25 03:26:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 03:26:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-25 03:26:47,020 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 41 [2020-09-25 03:26:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:47,021 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-25 03:26:47,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:26:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-25 03:26:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 03:26:47,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:47,023 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:47,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:26:47,024 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:47,024 INFO L82 PathProgramCache]: Analyzing trace with hash 765701111, now seen corresponding path program 3 times [2020-09-25 03:26:47,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:47,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038625722] [2020-09-25 03:26:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 03:26:47,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:47,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-09-25 03:26:47,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 03:26:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:26:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 03:26:47,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:47,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:47,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:47,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:47,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:47,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:47,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:47,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:47,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:47,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:47,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:47,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038625722] [2020-09-25 03:26:47,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:47,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 03:26:47,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578036631] [2020-09-25 03:26:47,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 03:26:47,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:47,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 03:26:47,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:26:47,627 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2020-09-25 03:26:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:47,915 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-09-25 03:26:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 03:26:47,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-09-25 03:26:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:47,917 INFO L225 Difference]: With dead ends: 79 [2020-09-25 03:26:47,917 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 03:26:47,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2020-09-25 03:26:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 03:26:47,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-25 03:26:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 03:26:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-09-25 03:26:47,925 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2020-09-25 03:26:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:47,926 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-09-25 03:26:47,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 03:26:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-09-25 03:26:47,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 03:26:47,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:47,928 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:47,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:26:47,928 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:47,929 INFO L82 PathProgramCache]: Analyzing trace with hash -258080061, now seen corresponding path program 4 times [2020-09-25 03:26:47,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:47,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963398008] [2020-09-25 03:26:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:47,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:48,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 03:26:48,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:48,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-09-25 03:26:48,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 03:26:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 03:26:48,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 03:26:48,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:48,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:48,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:48,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:48,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:26:48,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:48,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:26:48,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:48,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:48,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:48,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:48,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:26:48,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963398008] [2020-09-25 03:26:48,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:48,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 03:26:48,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972715244] [2020-09-25 03:26:48,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 03:26:48,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:48,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 03:26:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-09-25 03:26:48,779 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2020-09-25 03:26:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:49,276 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-09-25 03:26:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 03:26:49,277 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-09-25 03:26:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:49,279 INFO L225 Difference]: With dead ends: 87 [2020-09-25 03:26:49,279 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 03:26:49,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 03:26:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 03:26:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-09-25 03:26:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 03:26:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-25 03:26:49,289 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2020-09-25 03:26:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:49,289 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-25 03:26:49,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 03:26:49,290 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-25 03:26:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 03:26:49,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:49,292 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:49,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:26:49,293 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:49,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1030394231, now seen corresponding path program 5 times [2020-09-25 03:26:49,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:49,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530126121] [2020-09-25 03:26:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 03:26:49,316 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 03:26:49,316 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 03:26:49,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:26:49,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:26:49 BoogieIcfgContainer [2020-09-25 03:26:49,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 03:26:49,347 INFO L168 Benchmark]: Toolchain (without parser) took 6977.77 ms. Allocated memory was 138.4 MB in the beginning and 285.7 MB in the end (delta: 147.3 MB). Free memory was 100.4 MB in the beginning and 110.2 MB in the end (delta: -9.9 MB). Peak memory consumption was 137.5 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:49,348 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 03:26:49,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.21 ms. Allocated memory is still 138.4 MB. Free memory was 99.7 MB in the beginning and 90.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:49,350 INFO L168 Benchmark]: Boogie Preprocessor took 109.44 ms. Allocated memory was 138.4 MB in the beginning and 199.2 MB in the end (delta: 60.8 MB). Free memory was 90.4 MB in the beginning and 179.2 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:49,350 INFO L168 Benchmark]: RCFGBuilder took 297.22 ms. Allocated memory is still 199.2 MB. Free memory was 178.8 MB in the beginning and 166.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:49,351 INFO L168 Benchmark]: TraceAbstraction took 6222.25 ms. Allocated memory was 199.2 MB in the beginning and 285.7 MB in the end (delta: 86.5 MB). Free memory was 165.4 MB in the beginning and 110.2 MB in the end (delta: 55.1 MB). Peak memory consumption was 141.6 MB. Max. memory is 7.1 GB. [2020-09-25 03:26:49,355 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 339.21 ms. Allocated memory is still 138.4 MB. Free memory was 99.7 MB in the beginning and 90.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.44 ms. Allocated memory was 138.4 MB in the beginning and 199.2 MB in the end (delta: 60.8 MB). Free memory was 90.4 MB in the beginning and 179.2 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 297.22 ms. Allocated memory is still 199.2 MB. Free memory was 178.8 MB in the beginning and 166.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6222.25 ms. Allocated memory was 199.2 MB in the beginning and 285.7 MB in the end (delta: 86.5 MB). Free memory was 165.4 MB in the beginning and 110.2 MB in the end (delta: 55.1 MB). Peak memory consumption was 141.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i