/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:51:25,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:51:25,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:51:25,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:51:25,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:51:25,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:51:25,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:51:25,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:51:25,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:51:25,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:51:25,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:51:25,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:51:25,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:51:25,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:51:25,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:51:25,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:51:25,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:51:25,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:51:25,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:51:25,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:51:25,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:51:25,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:51:25,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:51:25,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:51:25,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 03:51:25,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:51:25,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:51:25,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:51:25,649 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 [2020-08-22 03:51:25,686 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:51:25,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:51:25,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:51:25,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:51:25,691 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:51:25,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:51:25,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:51:25,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:51:25,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:51:25,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:51:25,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:51:25,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:51:25,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:51:25,694 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:51:25,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:51:25,694 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:51:25,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:51:25,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:51:25,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:51:25,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:51:25,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:51:25,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:51:25,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:51:25,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:51:25,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:51:25,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:51:25,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:51:25,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:51:25,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:51:25,697 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:51:25,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:51:26,008 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:51:26,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:51:26,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:51:26,014 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:51:26,015 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-08-22 03:51:26,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83aad3aed/958cb4acd38a43fe8896854f212eb304/FLAG3cfb8438c [2020-08-22 03:51:26,510 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:51:26,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-08-22 03:51:26,520 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83aad3aed/958cb4acd38a43fe8896854f212eb304/FLAG3cfb8438c [2020-08-22 03:51:26,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83aad3aed/958cb4acd38a43fe8896854f212eb304 [2020-08-22 03:51:26,920 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:51:26,922 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:51:26,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:51:26,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:51:26,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:51:26,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:51:26" (1/1) ... [2020-08-22 03:51:26,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@285e86f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:26, skipping insertion in model container [2020-08-22 03:51:26,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:51:26" (1/1) ... [2020-08-22 03:51:26,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:51:26,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:51:27,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:51:27,170 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:51:27,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:51:27,206 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:51:27,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:27 WrapperNode [2020-08-22 03:51:27,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:51:27,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:51:27,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:51:27,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:51:27,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:27" (1/1) ... [2020-08-22 03:51:27,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:27" (1/1) ... [2020-08-22 03:51:27,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:27" (1/1) ... [2020-08-22 03:51:27,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:27" (1/1) ... [2020-08-22 03:51:27,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:27" (1/1) ... [2020-08-22 03:51:27,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:27" (1/1) ... [2020-08-22 03:51:27,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:27" (1/1) ... [2020-08-22 03:51:27,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:51:27,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:51:27,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:51:27,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:51:27,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:27" (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 [2020-08-22 03:51:27,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:51:27,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:51:27,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:51:27,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:51:27,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:51:27,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:51:27,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:51:27,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:51:27,649 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:51:27,650 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 03:51:27,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:51:27 BoogieIcfgContainer [2020-08-22 03:51:27,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:51:27,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:51:27,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:51:27,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:51:27,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:51:26" (1/3) ... [2020-08-22 03:51:27,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5780a13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:51:27, skipping insertion in model container [2020-08-22 03:51:27,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:27" (2/3) ... [2020-08-22 03:51:27,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5780a13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:51:27, skipping insertion in model container [2020-08-22 03:51:27,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:51:27" (3/3) ... [2020-08-22 03:51:27,665 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-08-22 03:51:27,678 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:51:27,686 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:51:27,706 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:51:27,737 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:51:27,737 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:51:27,737 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:51:27,737 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:51:27,737 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:51:27,738 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:51:27,738 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:51:27,738 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:51:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-22 03:51:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 03:51:27,766 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:27,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:27,771 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-08-22 03:51:27,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:27,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067677909] [2020-08-22 03:51:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:27,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:28,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067677909] [2020-08-22 03:51:28,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:28,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:28,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790897232] [2020-08-22 03:51:28,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:28,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:28,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:28,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,031 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-22 03:51:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:28,102 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-08-22 03:51:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:28,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 03:51:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:28,114 INFO L225 Difference]: With dead ends: 63 [2020-08-22 03:51:28,114 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 03:51:28,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 03:51:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-08-22 03:51:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 03:51:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-08-22 03:51:28,163 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-08-22 03:51:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:28,163 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-08-22 03:51:28,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-08-22 03:51:28,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 03:51:28,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:28,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:28,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:51:28,166 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:28,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-08-22 03:51:28,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:28,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252732767] [2020-08-22 03:51:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:28,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252732767] [2020-08-22 03:51:28,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:28,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:28,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003872735] [2020-08-22 03:51:28,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:28,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:28,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:28,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,226 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-08-22 03:51:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:28,251 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-08-22 03:51:28,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:28,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 03:51:28,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:28,254 INFO L225 Difference]: With dead ends: 77 [2020-08-22 03:51:28,254 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 03:51:28,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 03:51:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-08-22 03:51:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 03:51:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-08-22 03:51:28,265 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-08-22 03:51:28,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:28,266 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-08-22 03:51:28,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-08-22 03:51:28,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 03:51:28,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:28,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:28,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:51:28,268 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-08-22 03:51:28,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:28,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313877357] [2020-08-22 03:51:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:28,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313877357] [2020-08-22 03:51:28,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:28,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:28,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224554100] [2020-08-22 03:51:28,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:28,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:28,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,320 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-08-22 03:51:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:28,348 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-08-22 03:51:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:28,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 03:51:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:28,351 INFO L225 Difference]: With dead ends: 72 [2020-08-22 03:51:28,351 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 03:51:28,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 03:51:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-22 03:51:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 03:51:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-08-22 03:51:28,362 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-08-22 03:51:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:28,363 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-08-22 03:51:28,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-08-22 03:51:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 03:51:28,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:28,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:28,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:51:28,365 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:28,366 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-08-22 03:51:28,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:28,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734623945] [2020-08-22 03:51:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:28,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734623945] [2020-08-22 03:51:28,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:28,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:28,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812820607] [2020-08-22 03:51:28,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:28,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:28,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,413 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-08-22 03:51:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:28,437 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-08-22 03:51:28,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:28,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 03:51:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:28,440 INFO L225 Difference]: With dead ends: 88 [2020-08-22 03:51:28,440 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 03:51:28,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 03:51:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-08-22 03:51:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 03:51:28,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-08-22 03:51:28,456 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-08-22 03:51:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:28,457 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-08-22 03:51:28,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-08-22 03:51:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 03:51:28,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:28,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:28,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:51:28,460 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-08-22 03:51:28,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:28,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197352147] [2020-08-22 03:51:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:28,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197352147] [2020-08-22 03:51:28,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:28,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:28,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535018777] [2020-08-22 03:51:28,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:28,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:28,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:28,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,501 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-08-22 03:51:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:28,526 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-08-22 03:51:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:28,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 03:51:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:28,528 INFO L225 Difference]: With dead ends: 144 [2020-08-22 03:51:28,528 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 03:51:28,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 03:51:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-08-22 03:51:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-22 03:51:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-08-22 03:51:28,541 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-08-22 03:51:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:28,542 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-08-22 03:51:28,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-08-22 03:51:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:51:28,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:28,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:28,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:51:28,544 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-08-22 03:51:28,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:28,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448891393] [2020-08-22 03:51:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:28,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448891393] [2020-08-22 03:51:28,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:28,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:28,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875025724] [2020-08-22 03:51:28,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:28,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:28,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:28,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,582 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-08-22 03:51:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:28,602 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-08-22 03:51:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:28,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:51:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:28,604 INFO L225 Difference]: With dead ends: 129 [2020-08-22 03:51:28,605 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 03:51:28,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 03:51:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-08-22 03:51:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 03:51:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-08-22 03:51:28,616 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-08-22 03:51:28,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:28,617 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-08-22 03:51:28,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-08-22 03:51:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:51:28,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:28,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:28,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:51:28,619 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:28,620 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-08-22 03:51:28,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:28,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826755456] [2020-08-22 03:51:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:28,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826755456] [2020-08-22 03:51:28,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:28,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:28,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449228643] [2020-08-22 03:51:28,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:28,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:28,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:28,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,676 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-08-22 03:51:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:28,707 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-08-22 03:51:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:28,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:51:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:28,711 INFO L225 Difference]: With dead ends: 156 [2020-08-22 03:51:28,711 INFO L226 Difference]: Without dead ends: 154 [2020-08-22 03:51:28,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-22 03:51:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-08-22 03:51:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 03:51:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-08-22 03:51:28,764 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-08-22 03:51:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:28,764 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-08-22 03:51:28,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-08-22 03:51:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:51:28,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:28,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:28,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:51:28,770 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:28,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:28,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-08-22 03:51:28,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:28,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768471991] [2020-08-22 03:51:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:28,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768471991] [2020-08-22 03:51:28,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:28,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:28,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687570738] [2020-08-22 03:51:28,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:28,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:28,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:28,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,837 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-08-22 03:51:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:28,875 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-08-22 03:51:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:28,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:51:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:28,877 INFO L225 Difference]: With dead ends: 272 [2020-08-22 03:51:28,877 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 03:51:28,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 03:51:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-08-22 03:51:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-22 03:51:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-08-22 03:51:28,895 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-08-22 03:51:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:28,895 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-08-22 03:51:28,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-08-22 03:51:28,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:28,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:28,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:28,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:51:28,898 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:28,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:28,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-08-22 03:51:28,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:28,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785739774] [2020-08-22 03:51:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:28,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785739774] [2020-08-22 03:51:28,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:28,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:28,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388786257] [2020-08-22 03:51:28,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:28,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:28,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,927 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-08-22 03:51:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:28,952 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-08-22 03:51:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:28,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:28,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:28,954 INFO L225 Difference]: With dead ends: 240 [2020-08-22 03:51:28,954 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 03:51:28,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 03:51:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-08-22 03:51:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-22 03:51:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-08-22 03:51:28,964 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-08-22 03:51:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:28,965 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-08-22 03:51:28,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-08-22 03:51:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:28,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:28,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:28,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:51:28,967 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:28,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:28,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-08-22 03:51:28,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:28,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667932218] [2020-08-22 03:51:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667932218] [2020-08-22 03:51:29,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341399129] [2020-08-22 03:51:29,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,005 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-08-22 03:51:29,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,035 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-08-22 03:51:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,040 INFO L225 Difference]: With dead ends: 284 [2020-08-22 03:51:29,041 INFO L226 Difference]: Without dead ends: 282 [2020-08-22 03:51:29,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-22 03:51:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-08-22 03:51:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 03:51:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-08-22 03:51:29,054 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-08-22 03:51:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,055 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-08-22 03:51:29,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-08-22 03:51:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:29,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:51:29,061 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-08-22 03:51:29,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157411970] [2020-08-22 03:51:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157411970] [2020-08-22 03:51:29,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939614153] [2020-08-22 03:51:29,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,108 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-08-22 03:51:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,128 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-08-22 03:51:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,130 INFO L225 Difference]: With dead ends: 524 [2020-08-22 03:51:29,130 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 03:51:29,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 03:51:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-08-22 03:51:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 03:51:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-08-22 03:51:29,142 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-08-22 03:51:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,142 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-08-22 03:51:29,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-08-22 03:51:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:29,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:51:29,144 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,145 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-08-22 03:51:29,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294403943] [2020-08-22 03:51:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294403943] [2020-08-22 03:51:29,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034619475] [2020-08-22 03:51:29,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,171 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-08-22 03:51:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,191 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-08-22 03:51:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,193 INFO L225 Difference]: With dead ends: 456 [2020-08-22 03:51:29,194 INFO L226 Difference]: Without dead ends: 314 [2020-08-22 03:51:29,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-22 03:51:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-08-22 03:51:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-22 03:51:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-08-22 03:51:29,205 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-08-22 03:51:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,205 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-08-22 03:51:29,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,206 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-08-22 03:51:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:29,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:51:29,207 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-08-22 03:51:29,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837352384] [2020-08-22 03:51:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837352384] [2020-08-22 03:51:29,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609964369] [2020-08-22 03:51:29,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,231 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-08-22 03:51:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,250 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-08-22 03:51:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,253 INFO L225 Difference]: With dead ends: 524 [2020-08-22 03:51:29,254 INFO L226 Difference]: Without dead ends: 522 [2020-08-22 03:51:29,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-22 03:51:29,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-08-22 03:51:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-22 03:51:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-08-22 03:51:29,268 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-08-22 03:51:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,268 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-08-22 03:51:29,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-08-22 03:51:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:29,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:51:29,270 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-08-22 03:51:29,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010021272] [2020-08-22 03:51:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010021272] [2020-08-22 03:51:29,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815554656] [2020-08-22 03:51:29,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,293 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-08-22 03:51:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,315 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-08-22 03:51:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:29,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,319 INFO L225 Difference]: With dead ends: 1020 [2020-08-22 03:51:29,319 INFO L226 Difference]: Without dead ends: 586 [2020-08-22 03:51:29,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-08-22 03:51:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-08-22 03:51:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-22 03:51:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-08-22 03:51:29,337 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-08-22 03:51:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,338 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-08-22 03:51:29,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-08-22 03:51:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:29,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,339 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] [2020-08-22 03:51:29,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:51:29,340 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,340 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-08-22 03:51:29,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738642084] [2020-08-22 03:51:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738642084] [2020-08-22 03:51:29,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663150232] [2020-08-22 03:51:29,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,360 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-08-22 03:51:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,381 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-08-22 03:51:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,384 INFO L225 Difference]: With dead ends: 876 [2020-08-22 03:51:29,385 INFO L226 Difference]: Without dead ends: 602 [2020-08-22 03:51:29,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-08-22 03:51:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-08-22 03:51:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-08-22 03:51:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-08-22 03:51:29,403 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-08-22 03:51:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,404 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-08-22 03:51:29,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-08-22 03:51:29,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:29,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,405 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] [2020-08-22 03:51:29,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:51:29,405 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-08-22 03:51:29,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246448881] [2020-08-22 03:51:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246448881] [2020-08-22 03:51:29,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009520494] [2020-08-22 03:51:29,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,428 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-08-22 03:51:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,458 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-08-22 03:51:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,463 INFO L225 Difference]: With dead ends: 970 [2020-08-22 03:51:29,463 INFO L226 Difference]: Without dead ends: 968 [2020-08-22 03:51:29,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-22 03:51:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-08-22 03:51:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-08-22 03:51:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-08-22 03:51:29,494 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-08-22 03:51:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,495 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-08-22 03:51:29,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-08-22 03:51:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:29,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,497 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] [2020-08-22 03:51:29,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 03:51:29,498 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,498 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-08-22 03:51:29,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120400930] [2020-08-22 03:51:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120400930] [2020-08-22 03:51:29,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155933050] [2020-08-22 03:51:29,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,521 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-08-22 03:51:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,558 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-08-22 03:51:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,559 INFO L225 Difference]: With dead ends: 1992 [2020-08-22 03:51:29,560 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 03:51:29,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 03:51:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 03:51:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 03:51:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 03:51:29,572 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-08-22 03:51:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,572 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 03:51:29,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 03:51:29,573 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 03:51:29,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 03:51:29,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 03:51:29,596 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 03:51:29,596 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:51:29,596 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:51:29,597 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 03:51:29,597 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 03:51:29,597 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 03:51:29,597 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-08-22 03:51:29,597 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-08-22 03:51:29,597 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,597 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-08-22 03:51:29,597 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-08-22 03:51:29,598 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-22 03:51:29,598 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,598 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,598 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,598 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-08-22 03:51:29,598 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-08-22 03:51:29,598 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,598 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-08-22 03:51:29,599 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-08-22 03:51:29,599 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-08-22 03:51:29,599 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,599 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-08-22 03:51:29,599 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-08-22 03:51:29,599 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-08-22 03:51:29,599 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-08-22 03:51:29,600 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,600 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,600 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,600 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-08-22 03:51:29,600 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,600 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-08-22 03:51:29,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:51:29 BoogieIcfgContainer [2020-08-22 03:51:29,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:51:29,616 INFO L168 Benchmark]: Toolchain (without parser) took 2693.12 ms. Allocated memory was 140.0 MB in the beginning and 245.4 MB in the end (delta: 105.4 MB). Free memory was 102.9 MB in the beginning and 211.5 MB in the end (delta: -108.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 03:51:29,617 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 03:51:29,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.75 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 91.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:29,618 INFO L168 Benchmark]: Boogie Preprocessor took 128.96 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.1 MB in the beginning and 180.4 MB in the end (delta: -89.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:29,619 INFO L168 Benchmark]: RCFGBuilder took 319.70 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 164.6 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:29,620 INFO L168 Benchmark]: TraceAbstraction took 1955.10 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 164.0 MB in the beginning and 211.5 MB in the end (delta: -47.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 03:51:29,623 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.75 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 91.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.96 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.1 MB in the beginning and 180.4 MB in the end (delta: -89.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 319.70 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 164.6 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1955.10 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 164.0 MB in the beginning and 211.5 MB in the end (delta: -47.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 923 SDtfs, 417 SDslu, 612 SDs, 0 SdLazy, 91 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...