/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 interpolation-heuristic=FIRST --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 [2020-08-21 14:55:59,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:55:59,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:55:59,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:55:59,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:55:59,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:55:59,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:55:59,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:55:59,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:55:59,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:55:59,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:55:59,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:55:59,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:55:59,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:55:59,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:55:59,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:55:59,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:55:59,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:55:59,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:55:59,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:55:59,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:55:59,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:55:59,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:55:59,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:55:59,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:55:59,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:55:59,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:55:59,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:55:59,510 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 [2020-08-21 14:55:59,554 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:55:59,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:55:59,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:55:59,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:55:59,557 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:55:59,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:55:59,558 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:55:59,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:55:59,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:55:59,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:55:59,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:55:59,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:55:59,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:55:59,560 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:55:59,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:55:59,561 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:55:59,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:55:59,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:55:59,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:55:59,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:55:59,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:55:59,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:55:59,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:55:59,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:55:59,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:55:59,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:55:59,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:55:59,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:55:59,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:55:59,564 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:55:59,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:55:59,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:55:59,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:55:59,944 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:55:59,945 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:55:59,946 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-08-21 14:56:00,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d5a38d0b/d8db8f2e562644519986566e1042a1ee/FLAG826ca0809 [2020-08-21 14:56:00,478 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:56:00,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-08-21 14:56:00,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d5a38d0b/d8db8f2e562644519986566e1042a1ee/FLAG826ca0809 [2020-08-21 14:56:00,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d5a38d0b/d8db8f2e562644519986566e1042a1ee [2020-08-21 14:56:00,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:56:00,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:56:00,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:00,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:56:00,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:56:00,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:00" (1/1) ... [2020-08-21 14:56:00,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e3fcd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:00, skipping insertion in model container [2020-08-21 14:56:00,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:00" (1/1) ... [2020-08-21 14:56:00,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:56:00,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:56:01,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:01,149 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:56:01,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:01,343 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:56:01,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:01 WrapperNode [2020-08-21 14:56:01,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:01,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:56:01,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:56:01,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:56:01,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:01" (1/1) ... [2020-08-21 14:56:01,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:01" (1/1) ... [2020-08-21 14:56:01,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:01" (1/1) ... [2020-08-21 14:56:01,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:01" (1/1) ... [2020-08-21 14:56:01,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:01" (1/1) ... [2020-08-21 14:56:01,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:01" (1/1) ... [2020-08-21 14:56:01,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:01" (1/1) ... [2020-08-21 14:56:01,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:56:01,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:56:01,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:56:01,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:56:01,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:01" (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 [2020-08-21 14:56:01,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:56:01,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:56:01,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:56:01,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:56:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:56:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:56:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:56:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:56:01,690 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:56:01,691 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 14:56:01,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:01 BoogieIcfgContainer [2020-08-21 14:56:01,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:56:01,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:56:01,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:56:01,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:56:01,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:56:00" (1/3) ... [2020-08-21 14:56:01,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4acabe69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:01, skipping insertion in model container [2020-08-21 14:56:01,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:01" (2/3) ... [2020-08-21 14:56:01,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4acabe69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:01, skipping insertion in model container [2020-08-21 14:56:01,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:01" (3/3) ... [2020-08-21 14:56:01,704 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-08-21 14:56:01,716 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:56:01,723 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:56:01,736 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:56:01,760 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:56:01,760 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:56:01,760 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:56:01,761 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:56:01,761 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:56:01,761 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:56:01,761 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:56:01,761 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:56:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-21 14:56:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 14:56:01,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:01,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:01,789 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:01,795 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-08-21 14:56:01,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:01,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169722048] [2020-08-21 14:56:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:01,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:01,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169722048] [2020-08-21 14:56:01,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:01,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:01,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545569983] [2020-08-21 14:56:01,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:01,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:02,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:02,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:02,010 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-21 14:56:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:02,060 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-08-21 14:56:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:02,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 14:56:02,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:02,076 INFO L225 Difference]: With dead ends: 63 [2020-08-21 14:56:02,076 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 14:56:02,080 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 [2020-08-21 14:56:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 14:56:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-08-21 14:56:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 14:56:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-08-21 14:56:02,133 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-08-21 14:56:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:02,134 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-08-21 14:56:02,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:02,135 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-08-21 14:56:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 14:56:02,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:02,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:02,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:56:02,137 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-08-21 14:56:02,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:02,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988530558] [2020-08-21 14:56:02,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:02,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988530558] [2020-08-21 14:56:02,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:02,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:02,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807360831] [2020-08-21 14:56:02,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:02,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:02,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:02,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:02,231 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-08-21 14:56:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:02,280 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-08-21 14:56:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:02,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 14:56:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:02,282 INFO L225 Difference]: With dead ends: 77 [2020-08-21 14:56:02,282 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 14:56:02,284 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 [2020-08-21 14:56:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 14:56:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-08-21 14:56:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 14:56:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-08-21 14:56:02,294 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-08-21 14:56:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:02,294 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-08-21 14:56:02,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-08-21 14:56:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 14:56:02,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:02,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:02,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:56:02,297 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:02,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-08-21 14:56:02,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:02,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557372759] [2020-08-21 14:56:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:02,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557372759] [2020-08-21 14:56:02,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:02,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:02,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356974752] [2020-08-21 14:56:02,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:02,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:02,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:02,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:02,348 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-08-21 14:56:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:02,373 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-08-21 14:56:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:02,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 14:56:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:02,375 INFO L225 Difference]: With dead ends: 72 [2020-08-21 14:56:02,375 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 14:56:02,376 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 [2020-08-21 14:56:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 14:56:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-21 14:56:02,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-21 14:56:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-08-21 14:56:02,386 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-08-21 14:56:02,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:02,387 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-08-21 14:56:02,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:02,387 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-08-21 14:56:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 14:56:02,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:02,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:02,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:56:02,389 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:02,390 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-08-21 14:56:02,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:02,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772617297] [2020-08-21 14:56:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:02,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772617297] [2020-08-21 14:56:02,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:02,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:02,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672400562] [2020-08-21 14:56:02,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:02,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:02,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:02,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:02,437 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-08-21 14:56:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:02,469 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-08-21 14:56:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:02,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 14:56:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:02,472 INFO L225 Difference]: With dead ends: 88 [2020-08-21 14:56:02,472 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 14:56:02,473 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 [2020-08-21 14:56:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 14:56:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-08-21 14:56:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 14:56:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-08-21 14:56:02,487 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-08-21 14:56:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:02,487 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-08-21 14:56:02,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-08-21 14:56:02,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 14:56:02,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:02,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:02,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:56:02,490 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:02,490 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-08-21 14:56:02,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:02,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797762324] [2020-08-21 14:56:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:02,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797762324] [2020-08-21 14:56:02,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:02,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:02,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159707426] [2020-08-21 14:56:02,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:02,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:02,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:02,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:02,540 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-08-21 14:56:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:02,583 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-08-21 14:56:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:02,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 14:56:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:02,585 INFO L225 Difference]: With dead ends: 144 [2020-08-21 14:56:02,585 INFO L226 Difference]: Without dead ends: 88 [2020-08-21 14:56:02,586 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 [2020-08-21 14:56:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-21 14:56:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-08-21 14:56:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-21 14:56:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-08-21 14:56:02,609 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-08-21 14:56:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:02,609 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-08-21 14:56:02,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-08-21 14:56:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 14:56:02,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:02,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:02,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:56:02,611 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:02,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-08-21 14:56:02,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:02,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12515382] [2020-08-21 14:56:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:02,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12515382] [2020-08-21 14:56:02,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:02,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:02,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643235738] [2020-08-21 14:56:02,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:02,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:02,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:02,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:02,705 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-08-21 14:56:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:02,756 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-08-21 14:56:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:02,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 14:56:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:02,760 INFO L225 Difference]: With dead ends: 129 [2020-08-21 14:56:02,760 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 14:56:02,761 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 [2020-08-21 14:56:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 14:56:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-08-21 14:56:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 14:56:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-08-21 14:56:02,773 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-08-21 14:56:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:02,774 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-08-21 14:56:02,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-08-21 14:56:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 14:56:02,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:02,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:02,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:56:02,776 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-08-21 14:56:02,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:02,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925773447] [2020-08-21 14:56:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:02,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925773447] [2020-08-21 14:56:02,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:02,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:02,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491147062] [2020-08-21 14:56:02,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:02,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:02,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:02,811 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-08-21 14:56:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:02,830 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-08-21 14:56:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:02,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 14:56:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:02,833 INFO L225 Difference]: With dead ends: 156 [2020-08-21 14:56:02,833 INFO L226 Difference]: Without dead ends: 154 [2020-08-21 14:56:02,834 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 [2020-08-21 14:56:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-21 14:56:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-08-21 14:56:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 14:56:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-08-21 14:56:02,849 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-08-21 14:56:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:02,850 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-08-21 14:56:02,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-08-21 14:56:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 14:56:02,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:02,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:02,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:56:02,852 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-08-21 14:56:02,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:02,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489330785] [2020-08-21 14:56:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:02,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489330785] [2020-08-21 14:56:02,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:02,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:02,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306950034] [2020-08-21 14:56:02,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:02,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:02,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:02,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:02,886 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-08-21 14:56:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:02,931 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-08-21 14:56:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:02,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 14:56:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:02,933 INFO L225 Difference]: With dead ends: 272 [2020-08-21 14:56:02,933 INFO L226 Difference]: Without dead ends: 162 [2020-08-21 14:56:02,935 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 [2020-08-21 14:56:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-21 14:56:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-08-21 14:56:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-21 14:56:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-08-21 14:56:02,964 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-08-21 14:56:02,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:02,964 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-08-21 14:56:02,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-08-21 14:56:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:56:02,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:02,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:02,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:56:02,969 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:02,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-08-21 14:56:02,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:02,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123973852] [2020-08-21 14:56:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:03,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123973852] [2020-08-21 14:56:03,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117184096] [2020-08-21 14:56:03,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,035 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-08-21 14:56:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:03,073 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-08-21 14:56:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:03,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:56:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:03,075 INFO L225 Difference]: With dead ends: 240 [2020-08-21 14:56:03,075 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 14:56:03,076 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 [2020-08-21 14:56:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 14:56:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-08-21 14:56:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-21 14:56:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-08-21 14:56:03,102 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-08-21 14:56:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:03,102 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-08-21 14:56:03,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-08-21 14:56:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:56:03,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:03,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:03,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:56:03,105 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-08-21 14:56:03,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:03,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642979212] [2020-08-21 14:56:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:03,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642979212] [2020-08-21 14:56:03,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733630829] [2020-08-21 14:56:03,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,167 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-08-21 14:56:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:03,192 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-08-21 14:56:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:03,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:56:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:03,198 INFO L225 Difference]: With dead ends: 284 [2020-08-21 14:56:03,198 INFO L226 Difference]: Without dead ends: 282 [2020-08-21 14:56:03,199 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 [2020-08-21 14:56:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-21 14:56:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-08-21 14:56:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 14:56:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-08-21 14:56:03,210 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-08-21 14:56:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:03,210 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-08-21 14:56:03,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-08-21 14:56:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:56:03,212 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:03,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:03,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:56:03,212 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:03,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-08-21 14:56:03,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:03,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658244876] [2020-08-21 14:56:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:03,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658244876] [2020-08-21 14:56:03,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757609196] [2020-08-21 14:56:03,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,240 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-08-21 14:56:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:03,264 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-08-21 14:56:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:03,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:56:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:03,266 INFO L225 Difference]: With dead ends: 524 [2020-08-21 14:56:03,267 INFO L226 Difference]: Without dead ends: 306 [2020-08-21 14:56:03,268 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 [2020-08-21 14:56:03,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-21 14:56:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-08-21 14:56:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 14:56:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-08-21 14:56:03,282 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-08-21 14:56:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:03,282 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-08-21 14:56:03,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-08-21 14:56:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:56:03,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:03,284 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] [2020-08-21 14:56:03,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:56:03,284 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:03,285 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-08-21 14:56:03,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:03,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728368702] [2020-08-21 14:56:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:03,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728368702] [2020-08-21 14:56:03,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588614284] [2020-08-21 14:56:03,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,309 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-08-21 14:56:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:03,327 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-08-21 14:56:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:03,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:56:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:03,330 INFO L225 Difference]: With dead ends: 456 [2020-08-21 14:56:03,330 INFO L226 Difference]: Without dead ends: 314 [2020-08-21 14:56:03,331 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 [2020-08-21 14:56:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-21 14:56:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-08-21 14:56:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-21 14:56:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-08-21 14:56:03,344 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-08-21 14:56:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:03,344 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-08-21 14:56:03,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-08-21 14:56:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:56:03,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:03,346 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] [2020-08-21 14:56:03,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:56:03,346 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:03,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:03,347 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-08-21 14:56:03,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:03,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426615683] [2020-08-21 14:56:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:03,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426615683] [2020-08-21 14:56:03,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402397787] [2020-08-21 14:56:03,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,371 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-08-21 14:56:03,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:03,392 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-08-21 14:56:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:03,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:56:03,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:03,396 INFO L225 Difference]: With dead ends: 524 [2020-08-21 14:56:03,396 INFO L226 Difference]: Without dead ends: 522 [2020-08-21 14:56:03,397 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 [2020-08-21 14:56:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-21 14:56:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-08-21 14:56:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 14:56:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-08-21 14:56:03,415 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-08-21 14:56:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:03,415 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-08-21 14:56:03,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-08-21 14:56:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:56:03,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:03,417 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] [2020-08-21 14:56:03,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:56:03,417 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-08-21 14:56:03,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:03,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087268816] [2020-08-21 14:56:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:03,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087268816] [2020-08-21 14:56:03,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472789364] [2020-08-21 14:56:03,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,442 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-08-21 14:56:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:03,468 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-08-21 14:56:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:03,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:56:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:03,472 INFO L225 Difference]: With dead ends: 1020 [2020-08-21 14:56:03,472 INFO L226 Difference]: Without dead ends: 586 [2020-08-21 14:56:03,473 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 [2020-08-21 14:56:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-08-21 14:56:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-08-21 14:56:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-21 14:56:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-08-21 14:56:03,496 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-08-21 14:56:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:03,496 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-08-21 14:56:03,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-08-21 14:56:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:56:03,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:03,498 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] [2020-08-21 14:56:03,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:56:03,499 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:03,499 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-08-21 14:56:03,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:03,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802030658] [2020-08-21 14:56:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:03,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802030658] [2020-08-21 14:56:03,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977960651] [2020-08-21 14:56:03,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,521 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-08-21 14:56:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:03,545 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-08-21 14:56:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:03,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:56:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:03,549 INFO L225 Difference]: With dead ends: 876 [2020-08-21 14:56:03,549 INFO L226 Difference]: Without dead ends: 602 [2020-08-21 14:56:03,550 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 [2020-08-21 14:56:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-08-21 14:56:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-08-21 14:56:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-08-21 14:56:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-08-21 14:56:03,571 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-08-21 14:56:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:03,571 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-08-21 14:56:03,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-08-21 14:56:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:56:03,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:03,573 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] [2020-08-21 14:56:03,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:56:03,573 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:03,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:03,574 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-08-21 14:56:03,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:03,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868956729] [2020-08-21 14:56:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:03,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868956729] [2020-08-21 14:56:03,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154934994] [2020-08-21 14:56:03,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,596 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-08-21 14:56:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:03,628 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-08-21 14:56:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:03,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:56:03,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:03,634 INFO L225 Difference]: With dead ends: 970 [2020-08-21 14:56:03,634 INFO L226 Difference]: Without dead ends: 968 [2020-08-21 14:56:03,635 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 [2020-08-21 14:56:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-21 14:56:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-08-21 14:56:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-08-21 14:56:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-08-21 14:56:03,669 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-08-21 14:56:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:03,670 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-08-21 14:56:03,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-08-21 14:56:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:56:03,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:03,673 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] [2020-08-21 14:56:03,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:56:03,673 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:03,674 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-08-21 14:56:03,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:03,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271919041] [2020-08-21 14:56:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:03,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271919041] [2020-08-21 14:56:03,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952486504] [2020-08-21 14:56:03,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,699 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-08-21 14:56:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:03,744 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-08-21 14:56:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:03,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:56:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:03,745 INFO L225 Difference]: With dead ends: 1992 [2020-08-21 14:56:03,745 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:56:03,748 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 [2020-08-21 14:56:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:56:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:56:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:56:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:56:03,749 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-08-21 14:56:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:03,750 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:56:03,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:56:03,750 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:56:03,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:56:03,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:56:03,783 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:56:03,784 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:56:03,784 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:56:03,784 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:56:03,784 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:56:03,784 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:56:03,784 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-08-21 14:56:03,784 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-08-21 14:56:03,784 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,784 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-08-21 14:56:03,785 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-08-21 14:56:03,785 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-21 14:56:03,785 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,785 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,785 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,785 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-08-21 14:56:03,785 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-08-21 14:56:03,785 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,786 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-08-21 14:56:03,786 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-08-21 14:56:03,786 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-08-21 14:56:03,786 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,786 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-08-21 14:56:03,786 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-08-21 14:56:03,787 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-08-21 14:56:03,787 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-08-21 14:56:03,787 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,787 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,787 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,787 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-08-21 14:56:03,787 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,788 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 14:56:03,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:56:03 BoogieIcfgContainer [2020-08-21 14:56:03,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:56:03,802 INFO L168 Benchmark]: Toolchain (without parser) took 2963.96 ms. Allocated memory was 147.8 MB in the beginning and 241.7 MB in the end (delta: 93.8 MB). Free memory was 104.3 MB in the beginning and 202.1 MB in the end (delta: -97.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:56:03,803 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:56:03,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 503.95 ms. Allocated memory was 147.8 MB in the beginning and 208.1 MB in the end (delta: 60.3 MB). Free memory was 104.1 MB in the beginning and 187.1 MB in the end (delta: -83.0 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:03,805 INFO L168 Benchmark]: Boogie Preprocessor took 57.88 ms. Allocated memory is still 208.1 MB. Free memory was 187.1 MB in the beginning and 184.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:03,806 INFO L168 Benchmark]: RCFGBuilder took 291.37 ms. Allocated memory is still 208.1 MB. Free memory was 184.8 MB in the beginning and 168.9 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:03,807 INFO L168 Benchmark]: TraceAbstraction took 2103.43 ms. Allocated memory was 208.1 MB in the beginning and 241.7 MB in the end (delta: 33.6 MB). Free memory was 168.9 MB in the beginning and 202.1 MB in the end (delta: -33.2 MB). Peak memory consumption was 367.3 kB. Max. memory is 7.1 GB. [2020-08-21 14:56:03,810 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 503.95 ms. Allocated memory was 147.8 MB in the beginning and 208.1 MB in the end (delta: 60.3 MB). Free memory was 104.1 MB in the beginning and 187.1 MB in the end (delta: -83.0 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.88 ms. Allocated memory is still 208.1 MB. Free memory was 187.1 MB in the beginning and 184.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.37 ms. Allocated memory is still 208.1 MB. Free memory was 184.8 MB in the beginning and 168.9 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2103.43 ms. Allocated memory was 208.1 MB in the beginning and 241.7 MB in the end (delta: 33.6 MB). Free memory was 168.9 MB in the beginning and 202.1 MB in the end (delta: -33.2 MB). Peak memory consumption was 367.3 kB. 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: 1.9s, 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, 0.2s 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...