/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:59:34,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:59:34,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:59:34,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:59:34,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:59:34,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:59:34,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:59:34,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:59:34,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:59:34,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:59:34,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:59:34,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:59:34,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:59:34,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:59:34,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:59:34,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:59:34,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:59:34,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:59:34,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:59:34,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:59:34,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:59:34,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:59:34,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:59:34,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:59:34,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:59:34,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:59:34,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:59:34,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:59:34,412 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 22:59:34,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:59:34,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:59:34,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:59:34,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:59:34,436 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:59:34,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:59:34,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:59:34,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:59:34,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:59:34,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:59:34,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:59:34,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:59:34,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:59:34,438 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:59:34,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:59:34,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:59:34,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:59:34,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:59:34,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:59:34,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:59:34,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:59:34,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:59:34,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:59:34,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:59:34,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:59:34,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:59:34,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:59:34,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:59:34,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:59:34,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:59:34,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:59:34,771 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:59:34,775 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:59:34,776 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:59:34,777 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:59:34,777 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-21 22:59:34,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79186878d/ab846269a1f14eec921eab8ef28697e0/FLAG3ec533ed1 [2020-08-21 22:59:35,293 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:59:35,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-21 22:59:35,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79186878d/ab846269a1f14eec921eab8ef28697e0/FLAG3ec533ed1 [2020-08-21 22:59:35,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79186878d/ab846269a1f14eec921eab8ef28697e0 [2020-08-21 22:59:35,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:59:35,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:59:35,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:35,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:59:35,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:59:35,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:35" (1/1) ... [2020-08-21 22:59:35,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5d0024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:35, skipping insertion in model container [2020-08-21 22:59:35,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:35" (1/1) ... [2020-08-21 22:59:35,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:59:35,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:59:35,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:35,985 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:59:36,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:36,029 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:59:36,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:36 WrapperNode [2020-08-21 22:59:36,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:36,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:59:36,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:59:36,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:59:36,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:36" (1/1) ... [2020-08-21 22:59:36,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:36" (1/1) ... [2020-08-21 22:59:36,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:36" (1/1) ... [2020-08-21 22:59:36,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:36" (1/1) ... [2020-08-21 22:59:36,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:36" (1/1) ... [2020-08-21 22:59:36,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:36" (1/1) ... [2020-08-21 22:59:36,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:36" (1/1) ... [2020-08-21 22:59:36,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:59:36,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:59:36,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:59:36,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:59:36,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:36" (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 22:59:36,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:59:36,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:59:36,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:59:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:59:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:59:36,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:59:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:59:36,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:59:36,544 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:59:36,544 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 22:59:36,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:36 BoogieIcfgContainer [2020-08-21 22:59:36,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:59:36,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:59:36,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:59:36,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:59:36,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:59:35" (1/3) ... [2020-08-21 22:59:36,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e50231f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:36, skipping insertion in model container [2020-08-21 22:59:36,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:36" (2/3) ... [2020-08-21 22:59:36,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e50231f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:36, skipping insertion in model container [2020-08-21 22:59:36,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:36" (3/3) ... [2020-08-21 22:59:36,558 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-21 22:59:36,571 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:59:36,578 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:59:36,593 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:59:36,619 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:59:36,619 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:59:36,619 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:59:36,619 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:59:36,619 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:59:36,620 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:59:36,620 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:59:36,620 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:59:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-21 22:59:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:36,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:36,651 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 22:59:36,651 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:36,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:36,659 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-21 22:59:36,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:36,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830792530] [2020-08-21 22:59:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:36,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:36,893 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 22:59:36,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830792530] [2020-08-21 22:59:36,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:36,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:36,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690045523] [2020-08-21 22:59:36,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:36,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:36,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:36,925 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-21 22:59:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:36,992 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-21 22:59:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:36,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:37,008 INFO L225 Difference]: With dead ends: 93 [2020-08-21 22:59:37,009 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 22:59:37,012 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 22:59:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 22:59:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-21 22:59:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 22:59:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-21 22:59:37,059 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-21 22:59:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:37,059 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-21 22:59:37,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:37,060 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-21 22:59:37,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:37,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:37,062 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 22:59:37,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:59:37,063 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:37,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-21 22:59:37,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:37,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639747089] [2020-08-21 22:59:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,142 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 22:59:37,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639747089] [2020-08-21 22:59:37,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:37,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:37,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426649964] [2020-08-21 22:59:37,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:37,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:37,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:37,147 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-21 22:59:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:37,176 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-21 22:59:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:37,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:37,179 INFO L225 Difference]: With dead ends: 127 [2020-08-21 22:59:37,180 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 22:59:37,181 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 22:59:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 22:59:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-21 22:59:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 22:59:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-21 22:59:37,194 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-21 22:59:37,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:37,195 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-21 22:59:37,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:37,195 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-21 22:59:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:37,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:37,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:37,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:59:37,197 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:37,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-21 22:59:37,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:37,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369161758] [2020-08-21 22:59:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,261 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 22:59:37,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369161758] [2020-08-21 22:59:37,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:37,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:37,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521357677] [2020-08-21 22:59:37,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:37,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:37,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:37,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:37,264 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-21 22:59:37,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:37,290 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-21 22:59:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:37,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:37,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:37,293 INFO L225 Difference]: With dead ends: 117 [2020-08-21 22:59:37,293 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 22:59:37,294 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 22:59:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 22:59:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-21 22:59:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 22:59:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-21 22:59:37,307 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-21 22:59:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:37,307 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-21 22:59:37,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-21 22:59:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:37,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:37,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:37,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:59:37,309 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-21 22:59:37,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:37,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415758662] [2020-08-21 22:59:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,368 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 22:59:37,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415758662] [2020-08-21 22:59:37,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:37,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:37,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102162808] [2020-08-21 22:59:37,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:37,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:37,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:37,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:37,371 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-21 22:59:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:37,412 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-21 22:59:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:37,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:37,415 INFO L225 Difference]: With dead ends: 148 [2020-08-21 22:59:37,415 INFO L226 Difference]: Without dead ends: 146 [2020-08-21 22:59:37,416 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 22:59:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-21 22:59:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-21 22:59:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 22:59:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-21 22:59:37,431 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-21 22:59:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:37,431 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-21 22:59:37,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-21 22:59:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:37,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:37,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:37,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:59:37,434 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:37,435 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-21 22:59:37,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:37,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837850285] [2020-08-21 22:59:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,479 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 22:59:37,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837850285] [2020-08-21 22:59:37,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:37,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:37,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858444279] [2020-08-21 22:59:37,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:37,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:37,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:37,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:37,483 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-21 22:59:37,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:37,521 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-21 22:59:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:37,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:37,526 INFO L225 Difference]: With dead ends: 244 [2020-08-21 22:59:37,526 INFO L226 Difference]: Without dead ends: 148 [2020-08-21 22:59:37,527 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 22:59:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-21 22:59:37,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-21 22:59:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-21 22:59:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-21 22:59:37,543 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-21 22:59:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:37,544 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-21 22:59:37,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-21 22:59:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:37,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:37,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:37,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:59:37,547 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:37,547 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-21 22:59:37,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:37,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676950305] [2020-08-21 22:59:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,588 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 22:59:37,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676950305] [2020-08-21 22:59:37,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:37,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:37,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120975599] [2020-08-21 22:59:37,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:37,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:37,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:37,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:37,591 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-21 22:59:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:37,611 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-21 22:59:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:37,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:37,614 INFO L225 Difference]: With dead ends: 219 [2020-08-21 22:59:37,614 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 22:59:37,615 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 22:59:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 22:59:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-21 22:59:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-21 22:59:37,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-21 22:59:37,642 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-21 22:59:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:37,643 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-21 22:59:37,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-21 22:59:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:37,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:37,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:37,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:59:37,645 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-21 22:59:37,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:37,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909932587] [2020-08-21 22:59:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,700 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 22:59:37,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909932587] [2020-08-21 22:59:37,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:37,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:37,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776761460] [2020-08-21 22:59:37,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:37,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:37,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:37,703 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-21 22:59:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:37,727 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-21 22:59:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:37,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:37,729 INFO L225 Difference]: With dead ends: 276 [2020-08-21 22:59:37,730 INFO L226 Difference]: Without dead ends: 274 [2020-08-21 22:59:37,730 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 22:59:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-21 22:59:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-21 22:59:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-21 22:59:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-21 22:59:37,745 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-21 22:59:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:37,746 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-21 22:59:37,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-21 22:59:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:37,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:37,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:37,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:59:37,749 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-21 22:59:37,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:37,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314285749] [2020-08-21 22:59:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,786 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 22:59:37,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314285749] [2020-08-21 22:59:37,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:37,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:37,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30752393] [2020-08-21 22:59:37,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:37,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:37,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:37,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:37,789 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-21 22:59:37,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:37,810 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-21 22:59:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:37,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:37,813 INFO L225 Difference]: With dead ends: 472 [2020-08-21 22:59:37,814 INFO L226 Difference]: Without dead ends: 282 [2020-08-21 22:59:37,815 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 22:59:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-21 22:59:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-21 22:59:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-21 22:59:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-21 22:59:37,839 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-21 22:59:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:37,841 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-21 22:59:37,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-21 22:59:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:37,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:37,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:37,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:59:37,850 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:37,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-21 22:59:37,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:37,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6585612] [2020-08-21 22:59:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,893 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 22:59:37,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6585612] [2020-08-21 22:59:37,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:37,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:37,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758643301] [2020-08-21 22:59:37,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:37,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:37,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:37,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:37,895 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-21 22:59:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:37,921 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-21 22:59:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:37,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:59:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:37,923 INFO L225 Difference]: With dead ends: 420 [2020-08-21 22:59:37,923 INFO L226 Difference]: Without dead ends: 286 [2020-08-21 22:59:37,924 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 22:59:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-21 22:59:37,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-21 22:59:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-21 22:59:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-21 22:59:37,937 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-21 22:59:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:37,938 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-21 22:59:37,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-21 22:59:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:37,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:37,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:37,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:59:37,940 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:37,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:37,941 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-21 22:59:37,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:37,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821299529] [2020-08-21 22:59:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:37,970 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 22:59:37,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821299529] [2020-08-21 22:59:37,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:37,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:37,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730658306] [2020-08-21 22:59:37,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:37,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:37,972 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-21 22:59:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:38,001 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-21 22:59:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:38,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:59:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:38,005 INFO L225 Difference]: With dead ends: 524 [2020-08-21 22:59:38,006 INFO L226 Difference]: Without dead ends: 522 [2020-08-21 22:59:38,007 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 22:59:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-21 22:59:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-21 22:59:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-21 22:59:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-21 22:59:38,038 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-21 22:59:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:38,041 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-21 22:59:38,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-21 22:59:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:38,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:38,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:38,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:59:38,044 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-21 22:59:38,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:38,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493753232] [2020-08-21 22:59:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,110 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 22:59:38,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493753232] [2020-08-21 22:59:38,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:38,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:38,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796818632] [2020-08-21 22:59:38,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:38,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:38,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:38,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:38,114 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-21 22:59:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:38,160 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-21 22:59:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:38,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:59:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:38,166 INFO L225 Difference]: With dead ends: 924 [2020-08-21 22:59:38,166 INFO L226 Difference]: Without dead ends: 546 [2020-08-21 22:59:38,168 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 22:59:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-21 22:59:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-21 22:59:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-21 22:59:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-21 22:59:38,193 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-21 22:59:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:38,193 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-21 22:59:38,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-21 22:59:38,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:59:38,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:38,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:38,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:59:38,198 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-21 22:59:38,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:38,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083878756] [2020-08-21 22:59:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,241 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 22:59:38,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083878756] [2020-08-21 22:59:38,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:38,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:38,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914596754] [2020-08-21 22:59:38,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:38,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:38,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:38,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:38,244 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-21 22:59:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:38,275 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-21 22:59:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:38,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:59:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:38,279 INFO L225 Difference]: With dead ends: 816 [2020-08-21 22:59:38,279 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 22:59:38,282 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 22:59:38,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 22:59:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-21 22:59:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-21 22:59:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-21 22:59:38,301 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-21 22:59:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:38,301 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-21 22:59:38,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-21 22:59:38,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:59:38,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:38,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:38,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:59:38,306 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:38,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-21 22:59:38,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:38,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363382986] [2020-08-21 22:59:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,345 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 22:59:38,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363382986] [2020-08-21 22:59:38,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:38,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:38,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716126538] [2020-08-21 22:59:38,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:38,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:38,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:38,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:38,351 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-21 22:59:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:38,384 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-21 22:59:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:38,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:59:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:38,391 INFO L225 Difference]: With dead ends: 1004 [2020-08-21 22:59:38,392 INFO L226 Difference]: Without dead ends: 1002 [2020-08-21 22:59:38,392 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 22:59:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-21 22:59:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-21 22:59:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 22:59:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-21 22:59:38,421 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-21 22:59:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:38,422 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-21 22:59:38,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-21 22:59:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:59:38,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:38,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:38,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:59:38,425 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:38,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-21 22:59:38,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:38,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146165878] [2020-08-21 22:59:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,462 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 22:59:38,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146165878] [2020-08-21 22:59:38,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:38,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:38,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170278747] [2020-08-21 22:59:38,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:38,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:38,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:38,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:38,466 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-21 22:59:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:38,500 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-21 22:59:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:38,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:59:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:38,507 INFO L225 Difference]: With dead ends: 1820 [2020-08-21 22:59:38,507 INFO L226 Difference]: Without dead ends: 1066 [2020-08-21 22:59:38,510 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 22:59:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-21 22:59:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-21 22:59:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-21 22:59:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-21 22:59:38,546 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-21 22:59:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:38,546 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-21 22:59:38,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-21 22:59:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:59:38,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:38,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:38,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:59:38,550 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-21 22:59:38,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:38,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166703438] [2020-08-21 22:59:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,595 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 22:59:38,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166703438] [2020-08-21 22:59:38,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:38,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:38,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478540957] [2020-08-21 22:59:38,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:38,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:38,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:38,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:38,597 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-21 22:59:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:38,628 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-21 22:59:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:38,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:59:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:38,635 INFO L225 Difference]: With dead ends: 1596 [2020-08-21 22:59:38,635 INFO L226 Difference]: Without dead ends: 1082 [2020-08-21 22:59:38,638 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 22:59:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-21 22:59:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-21 22:59:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-21 22:59:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-21 22:59:38,668 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-21 22:59:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:38,670 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-21 22:59:38,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-21 22:59:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:59:38,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:38,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:38,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:59:38,672 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-21 22:59:38,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:38,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493347708] [2020-08-21 22:59:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,705 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 22:59:38,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493347708] [2020-08-21 22:59:38,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:38,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:38,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575248103] [2020-08-21 22:59:38,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:38,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:38,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:38,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:38,708 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-21 22:59:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:38,743 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-21 22:59:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:38,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:59:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:38,753 INFO L225 Difference]: With dead ends: 1932 [2020-08-21 22:59:38,753 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 22:59:38,754 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 22:59:38,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 22:59:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-21 22:59:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 22:59:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-21 22:59:38,806 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-21 22:59:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:38,807 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-21 22:59:38,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-21 22:59:38,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:59:38,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:38,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:38,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:59:38,811 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:38,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:38,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-21 22:59:38,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:38,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388099480] [2020-08-21 22:59:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:38,846 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 22:59:38,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388099480] [2020-08-21 22:59:38,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:38,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:38,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29657749] [2020-08-21 22:59:38,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:38,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:38,850 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-21 22:59:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:38,915 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-21 22:59:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:38,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:59:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:38,929 INFO L225 Difference]: With dead ends: 3596 [2020-08-21 22:59:38,929 INFO L226 Difference]: Without dead ends: 2090 [2020-08-21 22:59:38,935 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 22:59:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-21 22:59:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-21 22:59:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-21 22:59:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-21 22:59:39,019 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-21 22:59:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:39,020 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-21 22:59:39,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-21 22:59:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:59:39,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:39,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:39,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:59:39,024 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-21 22:59:39,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:39,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022478444] [2020-08-21 22:59:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:39,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:39,058 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 22:59:39,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022478444] [2020-08-21 22:59:39,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:39,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:39,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109667218] [2020-08-21 22:59:39,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:39,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:39,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:39,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:39,062 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-21 22:59:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:39,120 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-21 22:59:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:39,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:59:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:39,131 INFO L225 Difference]: With dead ends: 3132 [2020-08-21 22:59:39,131 INFO L226 Difference]: Without dead ends: 2122 [2020-08-21 22:59:39,135 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 22:59:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-21 22:59:39,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-21 22:59:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-21 22:59:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-21 22:59:39,207 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-21 22:59:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:39,207 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-21 22:59:39,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-21 22:59:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:59:39,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:39,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:39,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:59:39,211 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-21 22:59:39,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:39,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731675129] [2020-08-21 22:59:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:39,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:39,266 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 22:59:39,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731675129] [2020-08-21 22:59:39,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:39,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:39,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658423279] [2020-08-21 22:59:39,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:39,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:39,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:39,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:39,268 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-21 22:59:39,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:39,327 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-21 22:59:39,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:39,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:59:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:39,348 INFO L225 Difference]: With dead ends: 3724 [2020-08-21 22:59:39,348 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 22:59:39,350 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 22:59:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 22:59:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-21 22:59:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-21 22:59:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-21 22:59:39,440 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-21 22:59:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:39,440 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-21 22:59:39,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:39,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-21 22:59:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:59:39,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:39,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:39,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:59:39,449 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-21 22:59:39,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:39,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148235430] [2020-08-21 22:59:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:39,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:39,478 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 22:59:39,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148235430] [2020-08-21 22:59:39,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:39,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:39,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507808204] [2020-08-21 22:59:39,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:39,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:39,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:39,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:39,480 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-21 22:59:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:39,560 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-21 22:59:39,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:39,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:59:39,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:39,579 INFO L225 Difference]: With dead ends: 7116 [2020-08-21 22:59:39,579 INFO L226 Difference]: Without dead ends: 4106 [2020-08-21 22:59:39,586 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 22:59:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-21 22:59:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-21 22:59:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-21 22:59:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-21 22:59:39,700 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-21 22:59:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:39,701 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-21 22:59:39,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:39,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-21 22:59:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:59:39,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:39,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:39,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:59:39,709 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:39,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:39,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-21 22:59:39,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:39,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869383152] [2020-08-21 22:59:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:39,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:39,761 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 22:59:39,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869383152] [2020-08-21 22:59:39,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:39,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:39,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632233449] [2020-08-21 22:59:39,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:39,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:39,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:39,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:39,767 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-21 22:59:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:39,844 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-21 22:59:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:39,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 22:59:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:39,883 INFO L225 Difference]: With dead ends: 6156 [2020-08-21 22:59:39,888 INFO L226 Difference]: Without dead ends: 4170 [2020-08-21 22:59:39,896 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 22:59:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-21 22:59:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-21 22:59:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-21 22:59:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-21 22:59:40,022 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-21 22:59:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:40,022 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-21 22:59:40,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-21 22:59:40,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:59:40,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:40,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:40,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 22:59:40,028 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:40,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:40,029 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-21 22:59:40,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:40,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316311723] [2020-08-21 22:59:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:40,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:40,053 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 22:59:40,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316311723] [2020-08-21 22:59:40,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:40,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:40,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243917973] [2020-08-21 22:59:40,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:40,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:40,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:40,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:40,056 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-21 22:59:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:40,172 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-21 22:59:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:40,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 22:59:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:40,197 INFO L225 Difference]: With dead ends: 12108 [2020-08-21 22:59:40,198 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 22:59:40,211 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 22:59:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 22:59:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-21 22:59:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-21 22:59:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-21 22:59:40,601 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-21 22:59:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:40,601 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-21 22:59:40,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-21 22:59:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:59:40,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:40,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:40,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 22:59:40,612 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:40,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-21 22:59:40,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:40,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272397476] [2020-08-21 22:59:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:40,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:40,638 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 22:59:40,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272397476] [2020-08-21 22:59:40,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:40,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:40,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12928487] [2020-08-21 22:59:40,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:40,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:40,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:40,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:40,641 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-21 22:59:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:40,772 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-21 22:59:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:40,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 22:59:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:40,792 INFO L225 Difference]: With dead ends: 9100 [2020-08-21 22:59:40,792 INFO L226 Difference]: Without dead ends: 9098 [2020-08-21 22:59:40,797 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 22:59:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-21 22:59:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-21 22:59:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-21 22:59:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-21 22:59:41,003 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-21 22:59:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:41,004 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-21 22:59:41,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-21 22:59:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 22:59:41,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:41,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:41,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 22:59:41,018 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-21 22:59:41,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:41,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048344929] [2020-08-21 22:59:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:41,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:41,064 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 22:59:41,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048344929] [2020-08-21 22:59:41,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:41,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:41,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462420415] [2020-08-21 22:59:41,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:41,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:41,066 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-21 22:59:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:41,348 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-21 22:59:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:41,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 22:59:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:41,374 INFO L225 Difference]: With dead ends: 13708 [2020-08-21 22:59:41,374 INFO L226 Difference]: Without dead ends: 13706 [2020-08-21 22:59:41,378 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 22:59:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-21 22:59:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-21 22:59:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-21 22:59:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-21 22:59:41,621 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-21 22:59:41,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:41,622 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-21 22:59:41,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-21 22:59:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 22:59:41,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:41,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:41,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 22:59:41,641 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:41,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-21 22:59:41,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:41,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221744690] [2020-08-21 22:59:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:41,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:41,664 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 22:59:41,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221744690] [2020-08-21 22:59:41,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:41,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:41,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871026261] [2020-08-21 22:59:41,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:41,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:41,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:41,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:41,666 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-21 22:59:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:41,970 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-21 22:59:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:41,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 22:59:41,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:41,998 INFO L225 Difference]: With dead ends: 27788 [2020-08-21 22:59:41,999 INFO L226 Difference]: Without dead ends: 15754 [2020-08-21 22:59:42,019 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 22:59:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-21 22:59:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-21 22:59:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-21 22:59:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-21 22:59:42,339 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-21 22:59:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:42,339 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-21 22:59:42,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-21 22:59:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 22:59:42,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:42,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:42,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 22:59:42,359 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:42,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-21 22:59:42,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:42,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17644487] [2020-08-21 22:59:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:42,387 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 22:59:42,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17644487] [2020-08-21 22:59:42,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:42,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:42,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537065656] [2020-08-21 22:59:42,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:42,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:42,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:42,395 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-21 22:59:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:42,951 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-21 22:59:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:42,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 22:59:42,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:42,985 INFO L225 Difference]: With dead ends: 23820 [2020-08-21 22:59:42,986 INFO L226 Difference]: Without dead ends: 16138 [2020-08-21 22:59:43,003 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 22:59:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-21 22:59:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-21 22:59:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-21 22:59:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-21 22:59:43,280 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-21 22:59:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:43,280 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-21 22:59:43,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-21 22:59:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 22:59:43,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:43,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:43,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 22:59:43,302 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:43,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:43,303 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-21 22:59:43,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:43,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46289532] [2020-08-21 22:59:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:43,325 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 22:59:43,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46289532] [2020-08-21 22:59:43,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:43,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:43,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100082424] [2020-08-21 22:59:43,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:43,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:43,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:43,326 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-21 22:59:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:43,726 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-21 22:59:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:43,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 22:59:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:43,776 INFO L225 Difference]: With dead ends: 26636 [2020-08-21 22:59:43,777 INFO L226 Difference]: Without dead ends: 26634 [2020-08-21 22:59:43,782 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 22:59:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-21 22:59:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-21 22:59:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-21 22:59:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-21 22:59:44,248 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-21 22:59:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,249 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-21 22:59:44,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-21 22:59:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 22:59:44,292 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 22:59:44,292 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-21 22:59:44,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550287786] [2020-08-21 22:59:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,313 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 22:59:44,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550287786] [2020-08-21 22:59:44,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582618498] [2020-08-21 22:59:44,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,315 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-21 22:59:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,822 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-21 22:59:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 22:59:44,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,886 INFO L225 Difference]: With dead ends: 55308 [2020-08-21 22:59:44,886 INFO L226 Difference]: Without dead ends: 31242 [2020-08-21 22:59:44,927 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 22:59:44,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-21 22:59:45,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-21 22:59:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-21 22:59:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-21 22:59:45,774 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-21 22:59:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,774 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-21 22:59:45,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-21 22:59:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 22:59:45,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 22:59:45,807 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-21 22:59:45,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725698049] [2020-08-21 22:59:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,847 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 22:59:45,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725698049] [2020-08-21 22:59:45,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096001498] [2020-08-21 22:59:45,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,850 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-21 22:59:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:46,226 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-21 22:59:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:46,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 22:59:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:46,276 INFO L225 Difference]: With dead ends: 46860 [2020-08-21 22:59:46,276 INFO L226 Difference]: Without dead ends: 31754 [2020-08-21 22:59:46,309 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 22:59:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-21 22:59:47,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-21 22:59:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-21 22:59:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-21 22:59:47,751 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-21 22:59:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:47,751 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-21 22:59:47,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-21 22:59:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 22:59:47,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:47,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:47,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 22:59:47,779 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:47,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-21 22:59:47,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:47,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863690003] [2020-08-21 22:59:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:47,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:47,802 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 22:59:47,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863690003] [2020-08-21 22:59:47,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:47,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:47,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797234927] [2020-08-21 22:59:47,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:47,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:47,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:47,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:47,804 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-21 22:59:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:48,402 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-21 22:59:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:48,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 22:59:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:48,470 INFO L225 Difference]: With dead ends: 51210 [2020-08-21 22:59:48,470 INFO L226 Difference]: Without dead ends: 51208 [2020-08-21 22:59:48,490 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 22:59:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-21 22:59:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-21 22:59:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-21 22:59:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-21 22:59:49,528 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-21 22:59:49,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:49,528 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-21 22:59:49,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:49,528 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-21 22:59:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 22:59:49,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:49,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:49,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 22:59:49,571 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:49,571 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-21 22:59:49,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:49,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561962978] [2020-08-21 22:59:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:49,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:49,594 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 22:59:49,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561962978] [2020-08-21 22:59:49,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:49,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:49,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223268069] [2020-08-21 22:59:49,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:49,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:49,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:49,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:49,597 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-21 22:59:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:50,346 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-21 22:59:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:50,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 22:59:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:50,347 INFO L225 Difference]: With dead ends: 109576 [2020-08-21 22:59:50,347 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:59:50,438 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 22:59:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:59:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:59:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:59:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:59:50,439 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-21 22:59:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:50,439 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:59:50,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:50,439 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:59:50,439 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:59:50,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 22:59:50,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:59:50,470 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:59:50,470 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:50,470 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:50,470 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:59:50,470 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:59:50,471 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:59:50,471 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-21 22:59:50,471 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-21 22:59:50,471 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-21 22:59:50,471 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-21 22:59:50,471 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-21 22:59:50,471 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-21 22:59:50,471 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,472 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,472 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,472 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,472 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-21 22:59:50,472 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,472 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-21 22:59:50,472 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,472 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,473 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-21 22:59:50,473 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,473 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-21 22:59:50,473 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,473 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,473 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-21 22:59:50,474 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-21 22:59:50,474 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-21 22:59:50,474 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-21 22:59:50,474 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,474 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,474 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-21 22:59:50,474 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-21 22:59:50,474 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-21 22:59:50,474 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,475 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,475 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,475 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,475 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,475 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,475 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,475 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-21 22:59:50,475 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-21 22:59:50,476 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,476 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:59:50,476 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-21 22:59:50,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:59:50 BoogieIcfgContainer [2020-08-21 22:59:50,488 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:59:50,491 INFO L168 Benchmark]: Toolchain (without parser) took 14745.88 ms. Allocated memory was 139.5 MB in the beginning and 1.0 GB in the end (delta: 879.8 MB). Free memory was 101.7 MB in the beginning and 237.6 MB in the end (delta: -135.8 MB). Peak memory consumption was 743.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:50,491 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:59:50,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.06 ms. Allocated memory is still 139.5 MB. Free memory was 101.5 MB in the beginning and 90.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:50,493 INFO L168 Benchmark]: Boogie Preprocessor took 119.09 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 90.6 MB in the beginning and 179.1 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:50,493 INFO L168 Benchmark]: RCFGBuilder took 399.39 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 159.3 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:50,494 INFO L168 Benchmark]: TraceAbstraction took 13937.35 ms. Allocated memory was 201.9 MB in the beginning and 1.0 GB in the end (delta: 817.4 MB). Free memory was 158.7 MB in the beginning and 237.6 MB in the end (delta: -78.9 MB). Peak memory consumption was 738.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:50,496 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.06 ms. Allocated memory is still 139.5 MB. Free memory was 101.5 MB in the beginning and 90.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.09 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 90.6 MB in the beginning and 179.1 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 399.39 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 159.3 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13937.35 ms. Allocated memory was 201.9 MB in the beginning and 1.0 GB in the end (delta: 817.4 MB). Free memory was 158.7 MB in the beginning and 237.6 MB in the end (delta: -78.9 MB). Peak memory consumption was 738.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.8s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.0s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...