/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 --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/stateful_check.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:17:33,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:17:33,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:17:33,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:17:33,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:17:33,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:17:33,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:17:33,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:17:33,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:17:33,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:17:33,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:17:33,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:17:33,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:17:33,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:17:33,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:17:33,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:17:33,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:17:33,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:17:33,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:17:33,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:17:33,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:17:33,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:17:33,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:17:33,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:17:33,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:17:33,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:17:33,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:17:33,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:17:33,332 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 [2020-08-18 16:17:33,373 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:17:33,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:17:33,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:17:33,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:17:33,376 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:17:33,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:17:33,376 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:17:33,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:17:33,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:17:33,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:17:33,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:17:33,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:17:33,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:17:33,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:17:33,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:17:33,379 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:17:33,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:17:33,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:17:33,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:17:33,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:17:33,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:17:33,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:33,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:17:33,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:17:33,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:17:33,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:17:33,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:17:33,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:17:33,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:17:33,382 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.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:17:33,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:17:33,760 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:17:33,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:17:33,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:17:33,780 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:17:33,780 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-08-18 16:17:33,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f30a26382/3c147ea0a47a40f8b2f51dd527a93d2d/FLAGd0e26fd0e [2020-08-18 16:17:34,379 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:17:34,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-08-18 16:17:34,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f30a26382/3c147ea0a47a40f8b2f51dd527a93d2d/FLAGd0e26fd0e [2020-08-18 16:17:34,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f30a26382/3c147ea0a47a40f8b2f51dd527a93d2d [2020-08-18 16:17:34,761 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:17:34,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:17:34,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:34,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:17:34,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:17:34,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:34" (1/1) ... [2020-08-18 16:17:34,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a530f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:34, skipping insertion in model container [2020-08-18 16:17:34,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:34" (1/1) ... [2020-08-18 16:17:34,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:17:34,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:17:34,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:34,998 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:17:35,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:35,035 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:17:35,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:35 WrapperNode [2020-08-18 16:17:35,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:35,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:17:35,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:17:35,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:17:35,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:35" (1/1) ... [2020-08-18 16:17:35,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:35" (1/1) ... [2020-08-18 16:17:35,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:35" (1/1) ... [2020-08-18 16:17:35,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:35" (1/1) ... [2020-08-18 16:17:35,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:35" (1/1) ... [2020-08-18 16:17:35,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:35" (1/1) ... [2020-08-18 16:17:35,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:35" (1/1) ... [2020-08-18 16:17:35,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:17:35,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:17:35,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:17:35,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:17:35,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:35" (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 [2020-08-18 16:17:35,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:17:35,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:17:35,239 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-18 16:17:35,239 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-08-18 16:17:35,239 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-08-18 16:17:35,240 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2020-08-18 16:17:35,240 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2020-08-18 16:17:35,240 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2020-08-18 16:17:35,240 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2020-08-18 16:17:35,240 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2020-08-18 16:17:35,240 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2020-08-18 16:17:35,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:17:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:17:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-18 16:17:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:17:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-08-18 16:17:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-08-18 16:17:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2020-08-18 16:17:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2020-08-18 16:17:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2020-08-18 16:17:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2020-08-18 16:17:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2020-08-18 16:17:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2020-08-18 16:17:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:17:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:17:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:17:35,580 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:17:35,581 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 16:17:35,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:35 BoogieIcfgContainer [2020-08-18 16:17:35,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:17:35,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:17:35,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:17:35,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:17:35,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:17:34" (1/3) ... [2020-08-18 16:17:35,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562d24c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:35, skipping insertion in model container [2020-08-18 16:17:35,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:35" (2/3) ... [2020-08-18 16:17:35,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562d24c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:35, skipping insertion in model container [2020-08-18 16:17:35,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:35" (3/3) ... [2020-08-18 16:17:35,595 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-08-18 16:17:35,608 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:17:35,615 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:17:35,630 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:17:35,673 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:17:35,673 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:17:35,673 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:17:35,674 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:17:35,674 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:17:35,674 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:17:35,674 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:17:35,675 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:17:35,699 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-08-18 16:17:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 16:17:35,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:35,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:35,706 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:35,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:35,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1865767033, now seen corresponding path program 1 times [2020-08-18 16:17:35,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:35,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64354708] [2020-08-18 16:17:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:35,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:35,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:17:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:35,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64354708] [2020-08-18 16:17:35,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:35,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:17:35,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611661807] [2020-08-18 16:17:35,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:17:35,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:35,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:17:35,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:17:35,943 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 4 states. [2020-08-18 16:17:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:36,178 INFO L93 Difference]: Finished difference Result 140 states and 185 transitions. [2020-08-18 16:17:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:17:36,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-18 16:17:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:36,194 INFO L225 Difference]: With dead ends: 140 [2020-08-18 16:17:36,195 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 16:17:36,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:17:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 16:17:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-08-18 16:17:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-18 16:17:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-08-18 16:17:36,261 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 16 [2020-08-18 16:17:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:36,262 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-08-18 16:17:36,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:17:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-08-18 16:17:36,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 16:17:36,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:36,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:36,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:17:36,264 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:36,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:36,265 INFO L82 PathProgramCache]: Analyzing trace with hash 6927045, now seen corresponding path program 1 times [2020-08-18 16:17:36,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:36,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734896895] [2020-08-18 16:17:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:36,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:36,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:17:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:36,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734896895] [2020-08-18 16:17:36,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:36,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:17:36,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092990558] [2020-08-18 16:17:36,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:17:36,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:36,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:17:36,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:17:36,383 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 5 states. [2020-08-18 16:17:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:36,625 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2020-08-18 16:17:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:17:36,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-18 16:17:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:36,629 INFO L225 Difference]: With dead ends: 112 [2020-08-18 16:17:36,629 INFO L226 Difference]: Without dead ends: 106 [2020-08-18 16:17:36,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:17:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-18 16:17:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-08-18 16:17:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-18 16:17:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2020-08-18 16:17:36,668 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 17 [2020-08-18 16:17:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:36,669 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2020-08-18 16:17:36,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:17:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2020-08-18 16:17:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 16:17:36,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:36,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:36,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:17:36,671 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:36,672 INFO L82 PathProgramCache]: Analyzing trace with hash -695621135, now seen corresponding path program 1 times [2020-08-18 16:17:36,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:36,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012028506] [2020-08-18 16:17:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:36,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:36,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:17:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:36,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 16:17:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:36,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012028506] [2020-08-18 16:17:36,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:36,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:17:36,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78977601] [2020-08-18 16:17:36,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:17:36,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:36,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:17:36,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:17:36,770 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 6 states. [2020-08-18 16:17:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:37,016 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2020-08-18 16:17:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 16:17:37,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-08-18 16:17:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:37,019 INFO L225 Difference]: With dead ends: 253 [2020-08-18 16:17:37,019 INFO L226 Difference]: Without dead ends: 162 [2020-08-18 16:17:37,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:17:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-18 16:17:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2020-08-18 16:17:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-18 16:17:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 169 transitions. [2020-08-18 16:17:37,040 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 169 transitions. Word has length 29 [2020-08-18 16:17:37,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:37,041 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 169 transitions. [2020-08-18 16:17:37,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:17:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 169 transitions. [2020-08-18 16:17:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 16:17:37,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:37,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:37,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:17:37,043 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:37,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:37,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1328709660, now seen corresponding path program 1 times [2020-08-18 16:17:37,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:37,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097492480] [2020-08-18 16:17:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:17:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 16:17:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 16:17:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:37,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097492480] [2020-08-18 16:17:37,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:17:37,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 16:17:37,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111235827] [2020-08-18 16:17:37,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:17:37,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:37,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:17:37,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:17:37,168 INFO L87 Difference]: Start difference. First operand 126 states and 169 transitions. Second operand 7 states. [2020-08-18 16:17:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:37,433 INFO L93 Difference]: Finished difference Result 350 states and 513 transitions. [2020-08-18 16:17:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 16:17:37,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-08-18 16:17:37,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:37,437 INFO L225 Difference]: With dead ends: 350 [2020-08-18 16:17:37,437 INFO L226 Difference]: Without dead ends: 235 [2020-08-18 16:17:37,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:17:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-08-18 16:17:37,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2020-08-18 16:17:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-18 16:17:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 208 transitions. [2020-08-18 16:17:37,460 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 208 transitions. Word has length 40 [2020-08-18 16:17:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:37,460 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 208 transitions. [2020-08-18 16:17:37,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:17:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 208 transitions. [2020-08-18 16:17:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 16:17:37,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:37,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:37,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:17:37,463 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:37,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:37,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1520942249, now seen corresponding path program 1 times [2020-08-18 16:17:37,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:37,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196742100] [2020-08-18 16:17:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:17:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 16:17:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 16:17:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 16:17:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:37,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196742100] [2020-08-18 16:17:37,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:17:37,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 16:17:37,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434841445] [2020-08-18 16:17:37,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:17:37,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:17:37,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:17:37,624 INFO L87 Difference]: Start difference. First operand 150 states and 208 transitions. Second operand 8 states. [2020-08-18 16:17:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:37,998 INFO L93 Difference]: Finished difference Result 447 states and 675 transitions. [2020-08-18 16:17:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 16:17:37,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 16:17:38,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:38,002 INFO L225 Difference]: With dead ends: 447 [2020-08-18 16:17:38,003 INFO L226 Difference]: Without dead ends: 308 [2020-08-18 16:17:38,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-18 16:17:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-08-18 16:17:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 174. [2020-08-18 16:17:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-18 16:17:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 249 transitions. [2020-08-18 16:17:38,024 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 249 transitions. Word has length 51 [2020-08-18 16:17:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:38,024 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 249 transitions. [2020-08-18 16:17:38,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:17:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 249 transitions. [2020-08-18 16:17:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 16:17:38,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:38,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:38,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:17:38,028 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:38,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:38,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1574199465, now seen corresponding path program 1 times [2020-08-18 16:17:38,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:38,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963416820] [2020-08-18 16:17:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:38,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:38,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:17:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:38,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 16:17:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:38,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 16:17:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:38,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 16:17:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:38,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 16:17:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-18 16:17:38,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963416820] [2020-08-18 16:17:38,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:38,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:17:38,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624428007] [2020-08-18 16:17:38,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:17:38,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:38,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:17:38,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:17:38,123 INFO L87 Difference]: Start difference. First operand 174 states and 249 transitions. Second operand 6 states. [2020-08-18 16:17:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:38,266 INFO L93 Difference]: Finished difference Result 318 states and 465 transitions. [2020-08-18 16:17:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 16:17:38,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-08-18 16:17:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:38,268 INFO L225 Difference]: With dead ends: 318 [2020-08-18 16:17:38,269 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 16:17:38,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:17:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 16:17:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2020-08-18 16:17:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-18 16:17:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-08-18 16:17:38,280 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 63 [2020-08-18 16:17:38,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:38,281 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-08-18 16:17:38,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:17:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-08-18 16:17:38,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 16:17:38,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:38,284 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:38,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:17:38,284 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1192820603, now seen corresponding path program 1 times [2020-08-18 16:17:38,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:38,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700790046] [2020-08-18 16:17:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:17:38,315 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:17:38,315 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:17:38,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:17:38,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:17:38 BoogieIcfgContainer [2020-08-18 16:17:38,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:17:38,351 INFO L168 Benchmark]: Toolchain (without parser) took 3587.22 ms. Allocated memory was 148.4 MB in the beginning and 243.3 MB in the end (delta: 94.9 MB). Free memory was 104.2 MB in the beginning and 128.3 MB in the end (delta: -24.1 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:38,352 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:17:38,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.14 ms. Allocated memory is still 148.4 MB. Free memory was 104.0 MB in the beginning and 93.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:38,358 INFO L168 Benchmark]: Boogie Preprocessor took 132.27 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 93.7 MB in the beginning and 181.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:38,358 INFO L168 Benchmark]: RCFGBuilder took 417.12 ms. Allocated memory is still 203.9 MB. Free memory was 181.9 MB in the beginning and 162.4 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:38,359 INFO L168 Benchmark]: TraceAbstraction took 2759.97 ms. Allocated memory was 203.9 MB in the beginning and 243.3 MB in the end (delta: 39.3 MB). Free memory was 161.8 MB in the beginning and 128.3 MB in the end (delta: 33.5 MB). Peak memory consumption was 72.8 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:38,362 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.14 ms. Allocated memory is still 148.4 MB. Free memory was 104.0 MB in the beginning and 93.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.27 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 93.7 MB in the beginning and 181.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 417.12 ms. Allocated memory is still 203.9 MB. Free memory was 181.9 MB in the beginning and 162.4 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2759.97 ms. Allocated memory was 203.9 MB in the beginning and 243.3 MB in the end (delta: 39.3 MB). Free memory was 161.8 MB in the beginning and 128.3 MB in the end (delta: 33.5 MB). Peak memory consumption was 72.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] int ldv_mutex = 1; [L11] int open_called = 0; [L74] int ldv_s_misc_fops_file_operations = 0; [L75] CALL my_init() [L69] open_called = 0 [L70] return 0; [L75] RET my_init() [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L81] COND TRUE ldv_s_misc_fops_file_operations==0 [L82] CALL misc_open() [L57] COND TRUE __VERIFIER_nondet_int() [L59] return 1; [L82] RET misc_open() [L83] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L89] COND TRUE ldv_s_misc_fops_file_operations==1 [L90] CALL misc_read() [L52] return 0; [L90] RET misc_read() [L91] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L97] COND TRUE ldv_s_misc_fops_file_operations==2 [L98] CALL misc_llseek() [L48] return 0; [L98] RET misc_llseek() [L99] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L104] case 3: [L105] COND TRUE ldv_s_misc_fops_file_operations==3 [L106] CALL misc_release() [L34] COND FALSE !(\read(open_called)) [L41] CALL mutex_lock() [L16] (ldv_mutex == 1) ? 0 : __blast_assert() [L17] ldv_mutex = 2 [L41] RET mutex_lock() [L42] CALL mutex_lock() [L16] (ldv_mutex == 1) ? 0 : __blast_assert() [L16] CALL __blast_assert() [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 408 SDtfs, 599 SDslu, 753 SDs, 0 SdLazy, 707 SolverSat, 229 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 321 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 279 NumberOfCodeBlocks, 279 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 16438 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 25/39 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 incorrect! Received shutdown request...