/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 --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -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 21:07:24,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:07:24,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:07:24,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:07:24,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:07:24,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:07:24,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:07:24,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:07:24,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:07:24,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:07:24,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:07:24,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:07:24,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:07:24,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:07:24,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:07:24,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:07:24,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:07:24,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:07:24,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:07:24,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:07:24,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:07:24,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:07:24,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:07:24,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:07:24,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:07:24,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:07:24,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:07:24,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:07:24,763 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 21:07:24,786 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:07:24,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:07:24,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:07:24,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:07:24,788 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:07:24,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:07:24,788 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:07:24,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:07:24,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:07:24,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:07:24,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:07:24,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:07:24,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:07:24,789 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:07:24,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:07:24,790 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:07:24,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:07:24,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:07:24,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:07:24,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:07:24,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:07:24,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:24,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:07:24,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:07:24,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:07:24,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:07:24,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:07:24,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:07:24,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:07:24,792 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:07:25,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:07:25,129 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:07:25,132 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:07:25,134 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:07:25,134 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:07:25,135 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-08-18 21:07:25,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90e7361b9/3f60e5d9f1744acea446aa34b11744e6/FLAGa25e61328 [2020-08-18 21:07:25,686 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:07:25,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-08-18 21:07:25,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90e7361b9/3f60e5d9f1744acea446aa34b11744e6/FLAGa25e61328 [2020-08-18 21:07:26,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90e7361b9/3f60e5d9f1744acea446aa34b11744e6 [2020-08-18 21:07:26,063 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:07:26,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:07:26,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:26,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:07:26,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:07:26,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:26" (1/1) ... [2020-08-18 21:07:26,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144c4f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26, skipping insertion in model container [2020-08-18 21:07:26,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:26" (1/1) ... [2020-08-18 21:07:26,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:07:26,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:07:26,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:26,379 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:07:26,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:26,436 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:07:26,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26 WrapperNode [2020-08-18 21:07:26,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:26,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:07:26,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:07:26,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:07:26,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26" (1/1) ... [2020-08-18 21:07:26,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26" (1/1) ... [2020-08-18 21:07:26,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26" (1/1) ... [2020-08-18 21:07:26,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26" (1/1) ... [2020-08-18 21:07:26,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26" (1/1) ... [2020-08-18 21:07:26,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26" (1/1) ... [2020-08-18 21:07:26,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26" (1/1) ... [2020-08-18 21:07:26,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:07:26,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:07:26,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:07:26,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:07:26,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26" (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 21:07:26,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:07:26,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:07:26,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-18 21:07:26,646 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-08-18 21:07:26,646 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-08-18 21:07:26,646 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2020-08-18 21:07:26,646 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2020-08-18 21:07:26,646 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2020-08-18 21:07:26,646 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2020-08-18 21:07:26,647 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2020-08-18 21:07:26,649 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2020-08-18 21:07:26,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:07:26,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:07:26,650 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-18 21:07:26,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:07:26,650 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-08-18 21:07:26,650 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-08-18 21:07:26,651 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2020-08-18 21:07:26,651 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2020-08-18 21:07:26,651 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2020-08-18 21:07:26,651 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2020-08-18 21:07:26,651 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2020-08-18 21:07:26,651 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2020-08-18 21:07:26,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:07:26,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:07:26,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:07:27,030 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:07:27,031 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:07:27,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:27 BoogieIcfgContainer [2020-08-18 21:07:27,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:07:27,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:07:27,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:07:27,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:07:27,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:07:26" (1/3) ... [2020-08-18 21:07:27,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7903ae68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:27, skipping insertion in model container [2020-08-18 21:07:27,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:26" (2/3) ... [2020-08-18 21:07:27,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7903ae68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:27, skipping insertion in model container [2020-08-18 21:07:27,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:27" (3/3) ... [2020-08-18 21:07:27,044 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-08-18 21:07:27,054 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:07:27,063 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:07:27,077 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:07:27,100 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:07:27,101 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:07:27,101 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:07:27,101 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:07:27,101 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:07:27,101 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:07:27,101 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:07:27,101 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:07:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-08-18 21:07:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 21:07:27,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:27,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:27,130 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1865767033, now seen corresponding path program 1 times [2020-08-18 21:07:27,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:27,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281892094] [2020-08-18 21:07:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:27,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:27,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:07:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:27,336 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 21:07:27,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281892094] [2020-08-18 21:07:27,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:27,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:07:27,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784482302] [2020-08-18 21:07:27,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:07:27,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:27,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:07:27,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:27,360 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 4 states. [2020-08-18 21:07:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:27,565 INFO L93 Difference]: Finished difference Result 140 states and 185 transitions. [2020-08-18 21:07:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:07:27,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-18 21:07:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:27,582 INFO L225 Difference]: With dead ends: 140 [2020-08-18 21:07:27,582 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 21:07:27,587 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 21:07:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 21:07:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-08-18 21:07:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-18 21:07:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-08-18 21:07:27,652 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 16 [2020-08-18 21:07:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:27,653 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-08-18 21:07:27,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:07:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-08-18 21:07:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:07:27,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:27,654 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 21:07:27,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:07:27,655 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:27,656 INFO L82 PathProgramCache]: Analyzing trace with hash 6927045, now seen corresponding path program 1 times [2020-08-18 21:07:27,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:27,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816574473] [2020-08-18 21:07:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:27,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:27,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:07:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:27,767 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 21:07:27,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816574473] [2020-08-18 21:07:27,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:27,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:07:27,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064992056] [2020-08-18 21:07:27,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:27,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:27,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:27,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:27,772 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 5 states. [2020-08-18 21:07:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:28,039 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2020-08-18 21:07:28,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:07:28,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-18 21:07:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:28,043 INFO L225 Difference]: With dead ends: 112 [2020-08-18 21:07:28,043 INFO L226 Difference]: Without dead ends: 106 [2020-08-18 21:07:28,044 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 21:07:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-18 21:07:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-08-18 21:07:28,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-18 21:07:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2020-08-18 21:07:28,071 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 17 [2020-08-18 21:07:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:28,072 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2020-08-18 21:07:28,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2020-08-18 21:07:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 21:07:28,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:28,074 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 21:07:28,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:07:28,075 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:28,076 INFO L82 PathProgramCache]: Analyzing trace with hash -695621135, now seen corresponding path program 1 times [2020-08-18 21:07:28,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:28,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752631120] [2020-08-18 21:07:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:28,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:28,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:07:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:28,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 21:07:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:28,215 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 21:07:28,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752631120] [2020-08-18 21:07:28,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:28,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:07:28,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457053987] [2020-08-18 21:07:28,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:07:28,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:28,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:07:28,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:07:28,218 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 6 states. [2020-08-18 21:07:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:28,479 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2020-08-18 21:07:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:07:28,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-08-18 21:07:28,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:28,483 INFO L225 Difference]: With dead ends: 253 [2020-08-18 21:07:28,483 INFO L226 Difference]: Without dead ends: 162 [2020-08-18 21:07:28,485 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 21:07:28,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-18 21:07:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2020-08-18 21:07:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-18 21:07:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 169 transitions. [2020-08-18 21:07:28,506 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 169 transitions. Word has length 29 [2020-08-18 21:07:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:28,507 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 169 transitions. [2020-08-18 21:07:28,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:07:28,507 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 169 transitions. [2020-08-18 21:07:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 21:07:28,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:28,509 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 21:07:28,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:07:28,510 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:28,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:28,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1328709660, now seen corresponding path program 1 times [2020-08-18 21:07:28,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:28,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972715244] [2020-08-18 21:07:28,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:28,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:28,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:07:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:28,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:07:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:28,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 21:07:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:28,640 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 21:07:28,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972715244] [2020-08-18 21:07:28,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:28,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:07:28,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731430242] [2020-08-18 21:07:28,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:07:28,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:07:28,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:07:28,644 INFO L87 Difference]: Start difference. First operand 126 states and 169 transitions. Second operand 7 states. [2020-08-18 21:07:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:28,958 INFO L93 Difference]: Finished difference Result 350 states and 513 transitions. [2020-08-18 21:07:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:07:28,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-08-18 21:07:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:28,965 INFO L225 Difference]: With dead ends: 350 [2020-08-18 21:07:28,965 INFO L226 Difference]: Without dead ends: 235 [2020-08-18 21:07:28,969 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 21:07:28,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-08-18 21:07:29,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2020-08-18 21:07:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-18 21:07:29,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 208 transitions. [2020-08-18 21:07:29,012 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 208 transitions. Word has length 40 [2020-08-18 21:07:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:29,013 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 208 transitions. [2020-08-18 21:07:29,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:07:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 208 transitions. [2020-08-18 21:07:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 21:07:29,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:29,017 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 21:07:29,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:07:29,017 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:29,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:29,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1520942249, now seen corresponding path program 1 times [2020-08-18 21:07:29,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:29,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587439672] [2020-08-18 21:07:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:07:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:07:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 21:07:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 21:07:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,178 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 21:07:29,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587439672] [2020-08-18 21:07:29,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:29,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:07:29,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645338808] [2020-08-18 21:07:29,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:07:29,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:29,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:07:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:07:29,182 INFO L87 Difference]: Start difference. First operand 150 states and 208 transitions. Second operand 8 states. [2020-08-18 21:07:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:29,533 INFO L93 Difference]: Finished difference Result 447 states and 675 transitions. [2020-08-18 21:07:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:07:29,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 21:07:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:29,536 INFO L225 Difference]: With dead ends: 447 [2020-08-18 21:07:29,537 INFO L226 Difference]: Without dead ends: 308 [2020-08-18 21:07:29,538 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 21:07:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-08-18 21:07:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 174. [2020-08-18 21:07:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-18 21:07:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 249 transitions. [2020-08-18 21:07:29,556 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 249 transitions. Word has length 51 [2020-08-18 21:07:29,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:29,557 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 249 transitions. [2020-08-18 21:07:29,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:07:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 249 transitions. [2020-08-18 21:07:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 21:07:29,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:29,559 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 21:07:29,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:07:29,560 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1574199465, now seen corresponding path program 1 times [2020-08-18 21:07:29,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:29,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082251904] [2020-08-18 21:07:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:07:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:07:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 21:07:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:07:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 21:07:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:29,643 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 21:07:29,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082251904] [2020-08-18 21:07:29,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:29,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:07:29,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087120428] [2020-08-18 21:07:29,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:07:29,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:29,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:07:29,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:07:29,646 INFO L87 Difference]: Start difference. First operand 174 states and 249 transitions. Second operand 6 states. [2020-08-18 21:07:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:29,802 INFO L93 Difference]: Finished difference Result 318 states and 465 transitions. [2020-08-18 21:07:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:07:29,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-08-18 21:07:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:29,804 INFO L225 Difference]: With dead ends: 318 [2020-08-18 21:07:29,805 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 21:07:29,807 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 21:07:29,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 21:07:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2020-08-18 21:07:29,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-18 21:07:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-08-18 21:07:29,822 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 63 [2020-08-18 21:07:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:29,823 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-08-18 21:07:29,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:07:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-08-18 21:07:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 21:07:29,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:29,830 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 21:07:29,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:07:29,831 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:29,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1192820603, now seen corresponding path program 1 times [2020-08-18 21:07:29,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:29,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688349149] [2020-08-18 21:07:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:07:29,880 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:07:29,880 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:07:29,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:07:29,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:07:29 BoogieIcfgContainer [2020-08-18 21:07:29,914 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:07:29,919 INFO L168 Benchmark]: Toolchain (without parser) took 3851.31 ms. Allocated memory was 144.7 MB in the beginning and 251.1 MB in the end (delta: 106.4 MB). Free memory was 100.8 MB in the beginning and 147.1 MB in the end (delta: -46.3 MB). Peak memory consumption was 60.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:29,922 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-18 21:07:29,930 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.08 ms. Allocated memory is still 144.7 MB. Free memory was 100.6 MB in the beginning and 90.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:29,932 INFO L168 Benchmark]: Boogie Preprocessor took 144.32 ms. Allocated memory was 144.7 MB in the beginning and 199.8 MB in the end (delta: 55.1 MB). Free memory was 90.3 MB in the beginning and 177.1 MB in the end (delta: -86.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:29,933 INFO L168 Benchmark]: RCFGBuilder took 452.78 ms. Allocated memory is still 199.8 MB. Free memory was 177.1 MB in the beginning and 157.4 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:29,933 INFO L168 Benchmark]: TraceAbstraction took 2876.92 ms. Allocated memory was 199.8 MB in the beginning and 251.1 MB in the end (delta: 51.4 MB). Free memory was 156.7 MB in the beginning and 147.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:29,944 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 372.08 ms. Allocated memory is still 144.7 MB. Free memory was 100.6 MB in the beginning and 90.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.32 ms. Allocated memory was 144.7 MB in the beginning and 199.8 MB in the end (delta: 55.1 MB). Free memory was 90.3 MB in the beginning and 177.1 MB in the end (delta: -86.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 452.78 ms. Allocated memory is still 199.8 MB. Free memory was 177.1 MB in the beginning and 157.4 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2876.92 ms. Allocated memory was 199.8 MB in the beginning and 251.1 MB in the end (delta: 51.4 MB). Free memory was 156.7 MB in the beginning and 147.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 61.0 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: 2.7s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.6s, 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, 0.3s 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...