/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:20:22,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:20:22,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:20:22,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:20:22,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:20:22,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:20:22,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:20:22,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:20:22,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:20:22,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:20:22,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:20:22,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:20:22,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:20:22,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:20:22,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:20:22,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:20:22,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:20:22,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:20:22,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:20:22,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:20:22,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:20:22,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:20:22,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:20:22,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:20:22,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:20:22,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:20:22,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:20:22,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:20:22,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:20:22,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:20:22,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:20:22,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:20:22,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:20:22,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:20:22,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:20:22,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:20:22,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:20:22,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:20:22,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:20:22,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:20:22,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:20:22,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 02:20:22,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:20:22,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:20:22,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:20:22,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:20:22,867 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:20:22,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:20:22,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:20:22,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:20:22,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:20:22,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:20:22,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:20:22,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:20:22,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:20:22,869 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:20:22,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:20:22,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:20:22,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:20:22,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:20:22,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:20:22,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:20:22,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:20:22,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:20:22,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:20:22,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:20:22,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:20:22,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:20:22,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:20:22,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:20:22,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:20:22,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-09-25 02:20:23,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:20:23,342 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:20:23,346 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:20:23,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:20:23,349 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:20:23,350 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-09-25 02:20:23,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f31f54b50/dd6bcee2122443c6b9ca8bfa8deb1b5b/FLAG2b8d43072 [2020-09-25 02:20:23,969 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:20:23,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-09-25 02:20:23,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f31f54b50/dd6bcee2122443c6b9ca8bfa8deb1b5b/FLAG2b8d43072 [2020-09-25 02:20:24,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f31f54b50/dd6bcee2122443c6b9ca8bfa8deb1b5b [2020-09-25 02:20:24,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:20:24,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:20:24,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:20:24,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:20:24,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:20:24,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:20:24" (1/1) ... [2020-09-25 02:20:24,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30fa97df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24, skipping insertion in model container [2020-09-25 02:20:24,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:20:24" (1/1) ... [2020-09-25 02:20:24,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:20:24,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:20:24,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:20:24,599 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:20:24,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:20:24,641 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:20:24,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24 WrapperNode [2020-09-25 02:20:24,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:20:24,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:20:24,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:20:24,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:20:24,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24" (1/1) ... [2020-09-25 02:20:24,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24" (1/1) ... [2020-09-25 02:20:24,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24" (1/1) ... [2020-09-25 02:20:24,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24" (1/1) ... [2020-09-25 02:20:24,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24" (1/1) ... [2020-09-25 02:20:24,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24" (1/1) ... [2020-09-25 02:20:24,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24" (1/1) ... [2020-09-25 02:20:24,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:20:24,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:20:24,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:20:24,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:20:24,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:20:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:20:24,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:20:24,852 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:20:24,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:20:24,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:20:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:20:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:20:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:20:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:20:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 02:20:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:20:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:20:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:20:25,098 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:20:25,099 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 02:20:25,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:20:25 BoogieIcfgContainer [2020-09-25 02:20:25,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:20:25,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:20:25,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:20:25,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:20:25,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:20:24" (1/3) ... [2020-09-25 02:20:25,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629be02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:20:25, skipping insertion in model container [2020-09-25 02:20:25,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:24" (2/3) ... [2020-09-25 02:20:25,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629be02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:20:25, skipping insertion in model container [2020-09-25 02:20:25,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:20:25" (3/3) ... [2020-09-25 02:20:25,114 INFO L109 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-09-25 02:20:25,123 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:20:25,133 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:20:25,155 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:20:25,187 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:20:25,187 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:20:25,187 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:20:25,188 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:20:25,188 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:20:25,188 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:20:25,188 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:20:25,188 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:20:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-25 02:20:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 02:20:25,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:25,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:25,222 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:25,229 INFO L82 PathProgramCache]: Analyzing trace with hash 317967837, now seen corresponding path program 1 times [2020-09-25 02:20:25,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:25,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420721927] [2020-09-25 02:20:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:25,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:25,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:25,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 02:20:25,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:25,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-09-25 02:20:25,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:20:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:20:25,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 02:20:25,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:20:26,008 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 13 [2020-09-25 02:20:26,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:26,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:26,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:26,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:26,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:26,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:20:26,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:26,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:26,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:26,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:26,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420721927] [2020-09-25 02:20:26,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:20:26,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 02:20:26,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145489592] [2020-09-25 02:20:26,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 02:20:26,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:26,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 02:20:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:20:26,114 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 9 states. [2020-09-25 02:20:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:26,337 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-09-25 02:20:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:20:26,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-09-25 02:20:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:26,351 INFO L225 Difference]: With dead ends: 70 [2020-09-25 02:20:26,351 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 02:20:26,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:20:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 02:20:26,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-09-25 02:20:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-25 02:20:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-09-25 02:20:26,410 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-09-25 02:20:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:26,411 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-09-25 02:20:26,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 02:20:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-09-25 02:20:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 02:20:26,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:26,413 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] [2020-09-25 02:20:26,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:20:26,413 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash -628039010, now seen corresponding path program 1 times [2020-09-25 02:20:26,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:26,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543569995] [2020-09-25 02:20:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:26,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:26,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:26,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 02:20:26,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:26,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-09-25 02:20:26,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 02:20:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:20:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 02:20:26,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:27,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:27,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:27,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:27,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:27,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:20:27,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:27,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:27,047 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 02:20:27,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543569995] [2020-09-25 02:20:27,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:27,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:20:27,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047657443] [2020-09-25 02:20:27,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:20:27,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:27,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:20:27,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:20:27,052 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-09-25 02:20:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:27,397 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-09-25 02:20:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 02:20:27,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-09-25 02:20:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:27,399 INFO L225 Difference]: With dead ends: 53 [2020-09-25 02:20:27,400 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 02:20:27,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-25 02:20:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 02:20:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-09-25 02:20:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 02:20:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-09-25 02:20:27,409 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2020-09-25 02:20:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:27,410 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-09-25 02:20:27,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:20:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-09-25 02:20:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 02:20:27,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:27,411 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] [2020-09-25 02:20:27,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:20:27,412 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1791276066, now seen corresponding path program 1 times [2020-09-25 02:20:27,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:27,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722246301] [2020-09-25 02:20:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:27,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:27,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 02:20:27,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:27,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-09-25 02:20:27,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 02:20:27,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:20:27,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 02:20:27,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:27,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:27,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:27,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:27,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:27,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:27,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:20:27,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:27,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:27,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:27,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:27,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:27,968 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 02:20:27,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722246301] [2020-09-25 02:20:27,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:27,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:20:27,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055249746] [2020-09-25 02:20:27,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:20:27,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:27,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:20:27,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:20:27,972 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 12 states. [2020-09-25 02:20:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:28,386 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-09-25 02:20:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 02:20:28,387 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-09-25 02:20:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:28,388 INFO L225 Difference]: With dead ends: 54 [2020-09-25 02:20:28,388 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 02:20:28,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-25 02:20:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 02:20:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-09-25 02:20:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-25 02:20:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-25 02:20:28,397 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27 [2020-09-25 02:20:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:28,397 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-25 02:20:28,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:20:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-25 02:20:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 02:20:28,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:28,399 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, 1, 1] [2020-09-25 02:20:28,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:20:28,399 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1600642371, now seen corresponding path program 2 times [2020-09-25 02:20:28,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:28,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070882573] [2020-09-25 02:20:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:28,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:28,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:28,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 02:20:28,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:28,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-09-25 02:20:28,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:28,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 02:20:28,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:20:28,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 02:20:28,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:28,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:28,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:28,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:28,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:28,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:28,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:20:28,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:28,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:28,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:28,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:28,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 02:20:28,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070882573] [2020-09-25 02:20:28,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:28,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 02:20:28,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349646396] [2020-09-25 02:20:28,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 02:20:28,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:28,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 02:20:28,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-25 02:20:28,901 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 14 states. [2020-09-25 02:20:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:29,380 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-09-25 02:20:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 02:20:29,381 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-09-25 02:20:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:29,383 INFO L225 Difference]: With dead ends: 58 [2020-09-25 02:20:29,383 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 02:20:29,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-09-25 02:20:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 02:20:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2020-09-25 02:20:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 02:20:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-09-25 02:20:29,399 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 34 [2020-09-25 02:20:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:29,399 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-09-25 02:20:29,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 02:20:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-09-25 02:20:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 02:20:29,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:29,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:29,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:20:29,404 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1531087869, now seen corresponding path program 1 times [2020-09-25 02:20:29,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:29,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670561336] [2020-09-25 02:20:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:29,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:29,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:29,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 02:20:29,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:29,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-09-25 02:20:29,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:29,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 02:20:29,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:20:29,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 02:20:29,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:29,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:29,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:29,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:29,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:29,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:29,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:20:29,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:29,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:29,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:29,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 02:20:29,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670561336] [2020-09-25 02:20:29,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:29,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 02:20:29,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133397403] [2020-09-25 02:20:29,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 02:20:29,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:29,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 02:20:29,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-25 02:20:29,965 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 14 states. [2020-09-25 02:20:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:30,550 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-09-25 02:20:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 02:20:30,550 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-09-25 02:20:30,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:30,553 INFO L225 Difference]: With dead ends: 65 [2020-09-25 02:20:30,553 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 02:20:30,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-09-25 02:20:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 02:20:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-09-25 02:20:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 02:20:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-25 02:20:30,561 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 34 [2020-09-25 02:20:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:30,561 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-25 02:20:30,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 02:20:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-25 02:20:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 02:20:30,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:30,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:30,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:20:30,563 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash -966733443, now seen corresponding path program 2 times [2020-09-25 02:20:30,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:30,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503760211] [2020-09-25 02:20:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:30,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:30,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:30,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 02:20:30,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:30,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-09-25 02:20:30,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 02:20:30,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:20:30,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 02:20:30,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:31,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:31,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:31,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:31,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:31,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:31,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:31,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:31,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:31,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:31,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:31,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 02:20:31,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503760211] [2020-09-25 02:20:31,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:31,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 02:20:31,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623243553] [2020-09-25 02:20:31,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 02:20:31,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:31,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 02:20:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-25 02:20:31,031 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states. [2020-09-25 02:20:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:31,541 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-09-25 02:20:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 02:20:31,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-09-25 02:20:31,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:31,544 INFO L225 Difference]: With dead ends: 85 [2020-09-25 02:20:31,544 INFO L226 Difference]: Without dead ends: 79 [2020-09-25 02:20:31,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2020-09-25 02:20:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-25 02:20:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2020-09-25 02:20:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-25 02:20:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-09-25 02:20:31,552 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 34 [2020-09-25 02:20:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:31,553 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-09-25 02:20:31,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 02:20:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-09-25 02:20:31,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 02:20:31,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:31,555 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-25 02:20:31,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:20:31,555 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:31,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:31,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1509294206, now seen corresponding path program 3 times [2020-09-25 02:20:31,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:31,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638856093] [2020-09-25 02:20:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:31,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:31,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:31,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 02:20:31,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:31,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-09-25 02:20:31,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:31,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 02:20:31,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:20:31,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 02:20:31,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:32,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:32,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:32,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:32,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:32,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:32,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:32,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:32,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:32,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:32,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:32,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-25 02:20:32,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638856093] [2020-09-25 02:20:32,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:32,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 02:20:32,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159861761] [2020-09-25 02:20:32,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 02:20:32,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:32,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 02:20:32,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-25 02:20:32,099 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 15 states. [2020-09-25 02:20:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:32,639 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-09-25 02:20:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 02:20:32,640 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-25 02:20:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:32,641 INFO L225 Difference]: With dead ends: 63 [2020-09-25 02:20:32,641 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 02:20:32,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-09-25 02:20:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 02:20:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 02:20:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 02:20:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 02:20:32,644 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-09-25 02:20:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:32,644 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 02:20:32,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 02:20:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 02:20:32,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 02:20:32,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:20:32,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 02:20:32,772 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 02:20:32,772 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:20:32,772 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:20:32,773 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 02:20:32,773 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 02:20:32,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 02:20:32,773 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 02:20:32,773 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 02:20:32,773 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 02:20:32,774 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 02:20:32,774 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 02:20:32,774 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-25 02:20:32,774 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 29) no Hoare annotation was computed. [2020-09-25 02:20:32,774 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-09-25 02:20:32,774 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-25 02:20:32,775 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 02:20:32,775 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 26) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 (* 3 main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-09-25 02:20:32,775 INFO L268 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-09-25 02:20:32,775 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 26) the Hoare annotation is: (= (+ main_~a~0 main_~b~0) (* main_~n~0 3)) [2020-09-25 02:20:32,775 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-09-25 02:20:32,776 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 29) no Hoare annotation was computed. [2020-09-25 02:20:32,776 INFO L268 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-09-25 02:20:32,776 INFO L268 CegarLoopResult]: For program point L15-4(line 15) no Hoare annotation was computed. [2020-09-25 02:20:32,776 INFO L268 CegarLoopResult]: For program point L15-5(line 15) no Hoare annotation was computed. [2020-09-25 02:20:32,776 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 29) the Hoare annotation is: true [2020-09-25 02:20:32,776 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-25 02:20:32,777 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 02:20:32,777 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 02:20:32,777 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 24) no Hoare annotation was computed. [2020-09-25 02:20:32,777 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 02:20:32,777 INFO L268 CegarLoopResult]: For program point L18-2(line 18) no Hoare annotation was computed. [2020-09-25 02:20:32,777 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 02:20:32,777 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 02:20:32,778 INFO L268 CegarLoopResult]: For program point L18-4(line 18) no Hoare annotation was computed. [2020-09-25 02:20:32,778 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-25 02:20:32,778 INFO L268 CegarLoopResult]: For program point L18-5(lines 18 24) no Hoare annotation was computed. [2020-09-25 02:20:32,778 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-09-25 02:20:32,778 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 02:20:32,778 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 02:20:32,779 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 02:20:32,779 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 02:20:32,779 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 02:20:32,779 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 02:20:32,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:20:32 BoogieIcfgContainer [2020-09-25 02:20:32,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:20:32,805 INFO L168 Benchmark]: Toolchain (without parser) took 8480.27 ms. Allocated memory was 141.0 MB in the beginning and 294.1 MB in the end (delta: 153.1 MB). Free memory was 103.8 MB in the beginning and 249.9 MB in the end (delta: -146.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:32,806 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:20:32,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.26 ms. Allocated memory is still 141.0 MB. Free memory was 103.2 MB in the beginning and 93.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:32,808 INFO L168 Benchmark]: Boogie Preprocessor took 128.40 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 184.1 MB in the end (delta: -90.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:32,809 INFO L168 Benchmark]: RCFGBuilder took 332.53 ms. Allocated memory is still 204.5 MB. Free memory was 184.1 MB in the beginning and 170.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:32,809 INFO L168 Benchmark]: TraceAbstraction took 7697.43 ms. Allocated memory was 204.5 MB in the beginning and 294.1 MB in the end (delta: 89.7 MB). Free memory was 169.4 MB in the beginning and 249.9 MB in the end (delta: -80.6 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:32,813 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.26 ms. Allocated memory is still 141.0 MB. Free memory was 103.2 MB in the beginning and 93.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.40 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 184.1 MB in the end (delta: -90.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 332.53 ms. Allocated memory is still 204.5 MB. Free memory was 184.1 MB in the beginning and 170.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7697.43 ms. Allocated memory was 204.5 MB in the beginning and 294.1 MB in the end (delta: 89.7 MB). Free memory was 169.4 MB in the beginning and 249.9 MB in the end (delta: -80.6 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.4s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 172 SDtfs, 317 SDslu, 1118 SDs, 0 SdLazy, 938 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 183 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 77 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 34 HoareAnnotationTreeSize, 15 FomulaSimplifications, 789 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 44 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 70697 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 9/41 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...