/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:15:13,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:15:13,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:15:13,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:15:13,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:15:13,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:15:13,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:15:13,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:15:13,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:15:13,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:15:13,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:15:13,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:15:13,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:15:13,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:15:13,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:15:13,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:15:13,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:15:13,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:15:13,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:15:13,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:15:13,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:15:13,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:15:13,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:15:13,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:15:13,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:15:13,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:15:13,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:15:13,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:15:13,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:15:13,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 20:15:13,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:15:13,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:15:13,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:15:13,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:15:13,773 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:15:13,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:15:13,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:15:13,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:15:13,775 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:15:13,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:15:13,775 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:15:13,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:15:13,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:15:13,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:15:13,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:15:13,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:15:13,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:15:13,777 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:15:13,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:15:13,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:15:13,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:15:13,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:15:13,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:15:13,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:15:13,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:15:13,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:15:13,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:15:13,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:15:13,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:15:13,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:15:13,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:15:13,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:15:13,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:15:13,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:15:14,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:15:14,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:15:14,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:15:14,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:15:14,178 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:15:14,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2020-10-27 20:15:14,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/275d72470/73f5df4553f74d048a82091026e592ca/FLAG51130315f [2020-10-27 20:15:14,939 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:15:14,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2020-10-27 20:15:14,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/275d72470/73f5df4553f74d048a82091026e592ca/FLAG51130315f [2020-10-27 20:15:15,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/275d72470/73f5df4553f74d048a82091026e592ca [2020-10-27 20:15:15,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:15:15,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:15:15,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:15:15,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:15:15,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:15:15,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:15:15" (1/1) ... [2020-10-27 20:15:15,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe6ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15, skipping insertion in model container [2020-10-27 20:15:15,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:15:15" (1/1) ... [2020-10-27 20:15:15,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:15:15,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:15:15,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:15:15,538 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:15:15,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:15:15,578 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:15:15,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15 WrapperNode [2020-10-27 20:15:15,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:15:15,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:15:15,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:15:15,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:15:15,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15" (1/1) ... [2020-10-27 20:15:15,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15" (1/1) ... [2020-10-27 20:15:15,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15" (1/1) ... [2020-10-27 20:15:15,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15" (1/1) ... [2020-10-27 20:15:15,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15" (1/1) ... [2020-10-27 20:15:15,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15" (1/1) ... [2020-10-27 20:15:15,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15" (1/1) ... [2020-10-27 20:15:15,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:15:15,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:15:15,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:15:15,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:15:15,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:15:15,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:15:15,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:15:15,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:15:15,782 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 20:15:15,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:15:15,782 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:15:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:15:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:15:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:15:15,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:15:15,785 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:15:15,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:15:15,785 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 20:15:15,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:15:15,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:15:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:15:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:15:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:15:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:15:15,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:15:15,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:15:16,157 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:15:16,157 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:15:16,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:15:16 BoogieIcfgContainer [2020-10-27 20:15:16,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:15:16,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:15:16,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:15:16,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:15:16,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:15:15" (1/3) ... [2020-10-27 20:15:16,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1604fca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:15:16, skipping insertion in model container [2020-10-27 20:15:16,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:15:15" (2/3) ... [2020-10-27 20:15:16,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1604fca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:15:16, skipping insertion in model container [2020-10-27 20:15:16,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:15:16" (3/3) ... [2020-10-27 20:15:16,168 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2020-10-27 20:15:16,181 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:15:16,186 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:15:16,200 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:15:16,231 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:15:16,231 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:15:16,231 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:15:16,231 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:15:16,231 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:15:16,232 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:15:16,232 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:15:16,232 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:15:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 20:15:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:15:16,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:16,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:16,259 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:16,266 INFO L82 PathProgramCache]: Analyzing trace with hash 42548533, now seen corresponding path program 1 times [2020-10-27 20:15:16,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:16,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741063528] [2020-10-27 20:15:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:16,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:16,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:17,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:17,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:15:17,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:17,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-27 20:15:17,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:17,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:15:17,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:15:17,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:15:17,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 22 [2020-10-27 20:15:17,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:17,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:17,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:17,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:17,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:15:17,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:17,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:17,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:17,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741063528] [2020-10-27 20:15:17,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:15:17,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:15:17,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426316001] [2020-10-27 20:15:17,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:15:17,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:17,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:15:17,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:15:17,303 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-10-27 20:15:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:17,546 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-10-27 20:15:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:15:17,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 20:15:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:17,556 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:15:17,556 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:15:17,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:15:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:15:17,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 20:15:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:15:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 20:15:17,603 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2020-10-27 20:15:17,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:17,604 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 20:15:17,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:15:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 20:15:17,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 20:15:17,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:17,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:17,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:15:17,606 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:17,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1817555895, now seen corresponding path program 1 times [2020-10-27 20:15:17,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:17,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616412066] [2020-10-27 20:15:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:17,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:17,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:17,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:15:17,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:17,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-27 20:15:17,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:17,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:15:17,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:17,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:15:17,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:17,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:17,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:17,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:17,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:17,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:17,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:15:17,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:17,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:17,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616412066] [2020-10-27 20:15:17,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:15:17,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:15:17,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435233941] [2020-10-27 20:15:17,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:15:17,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:17,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:15:17,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:15:17,796 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2020-10-27 20:15:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:17,894 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-27 20:15:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:15:17,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 20:15:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:17,898 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:15:17,899 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:15:17,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:15:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:15:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-10-27 20:15:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:15:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 20:15:17,914 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2020-10-27 20:15:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:17,915 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 20:15:17,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:15:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 20:15:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:15:17,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:17,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:17,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:15:17,917 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:17,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1664459521, now seen corresponding path program 1 times [2020-10-27 20:15:17,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:17,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176432994] [2020-10-27 20:15:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:17,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:18,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:18,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:18,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:18,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:15:18,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:15:18,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-10-27 20:15:18,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:15:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:15:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:19,331 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2020-10-27 20:15:19,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:19,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:19,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:19,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:19,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:19,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 20:15:19,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:19,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:19,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:19,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:19,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:15:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:19,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176432994] [2020-10-27 20:15:19,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:19,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:15:19,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219224128] [2020-10-27 20:15:19,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:15:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:15:19,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:15:19,556 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2020-10-27 20:15:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:19,938 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-27 20:15:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:15:19,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 20:15:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:19,940 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:15:19,940 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 20:15:19,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:15:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 20:15:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-27 20:15:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:15:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-27 20:15:19,951 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 17 [2020-10-27 20:15:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:19,952 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-27 20:15:19,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:15:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-27 20:15:19,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:15:19,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:19,955 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:19,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:15:19,955 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:19,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:19,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1213439223, now seen corresponding path program 2 times [2020-10-27 20:15:19,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:19,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005616468] [2020-10-27 20:15:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:19,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:20,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:20,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:20,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:20,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:15:20,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:15:20,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-27 20:15:20,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:20,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:15:20,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:20,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:15:20,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:21,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:21,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:21,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:21,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:21,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:21,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:15:21,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:21,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:21,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 20:15:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:15:21,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005616468] [2020-10-27 20:15:21,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:21,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:15:21,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296942664] [2020-10-27 20:15:21,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:15:21,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:21,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:15:21,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:15:21,194 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 8 states. [2020-10-27 20:15:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:21,553 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-27 20:15:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:15:21,555 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-27 20:15:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:21,556 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:15:21,556 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:15:21,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:15:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:15:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-10-27 20:15:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:15:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 20:15:21,575 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2020-10-27 20:15:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:21,575 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 20:15:21,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:15:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 20:15:21,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:15:21,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:21,576 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] [2020-10-27 20:15:21,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:15:21,578 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2091275264, now seen corresponding path program 1 times [2020-10-27 20:15:21,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:21,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90017100] [2020-10-27 20:15:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:21,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:21,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:21,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:15:21,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:21,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-27 20:15:21,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:15:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:21,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:15:21,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:21,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:15:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:21,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:21,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:21,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:15:21,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:21,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:15:21,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:21,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:15:21,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:21,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:15:21,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 20:15:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:21,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:21,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:21,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:15:21,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:15:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:15:21,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:15:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:15:21,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:15:21,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:15:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 20:15:21,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90017100] [2020-10-27 20:15:21,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:15:21,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:15:21,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057666571] [2020-10-27 20:15:21,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:15:21,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:15:21,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:15:21,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:15:21,818 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-10-27 20:15:21,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:15:21,944 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-27 20:15:21,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:15:21,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-27 20:15:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:15:21,947 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:15:21,947 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 20:15:21,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:15:21,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 20:15:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-27 20:15:21,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:15:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 20:15:21,970 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-10-27 20:15:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:15:21,970 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 20:15:21,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:15:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 20:15:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:15:21,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:15:21,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:15:21,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:15:21,972 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:15:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:15:21,973 INFO L82 PathProgramCache]: Analyzing trace with hash 901983946, now seen corresponding path program 2 times [2020-10-27 20:15:21,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:15:21,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547853644] [2020-10-27 20:15:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:15:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:15:22,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:22,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:15:22,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:15:22,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:15:22,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:15:22,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-27 20:15:22,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:15:22,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:15:22,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:15:22,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:15:22,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0