/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 22:06:27,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:06:27,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:06:27,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 22:06:27,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 22:06:27,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 22:06:27,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 22:06:27,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 22:06:27,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 22:06:27,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 22:06:27,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 22:06:27,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 22:06:27,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:06:27,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:06:27,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:06:27,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:06:27,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:06:27,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:06:27,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:06:27,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:06:27,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:06:27,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:06:27,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:06:27,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:06:27,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 22:06:27,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:06:27,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:06:27,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:06:27,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 22:06:27,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:06:27,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:06:27,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:06:27,868 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:06:27,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:06:27,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:06:27,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:06:27,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:06:27,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:06:27,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:06:27,870 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:06:27,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:06:27,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:06:27,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:06:27,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:06:27,872 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:06:27,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:06:27,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:06:27,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:06:27,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:06:27,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:06:27,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:06:27,873 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 22:06:28,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:06:28,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:06:28,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:06:28,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:06:28,364 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:06:28,365 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-04 22:06:28,446 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea790c6db/610434b6ec4940628fc1c985b44e7af6/FLAGba4da9ae9 [2020-09-04 22:06:28,980 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:06:28,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-04 22:06:28,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea790c6db/610434b6ec4940628fc1c985b44e7af6/FLAGba4da9ae9 [2020-09-04 22:06:29,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea790c6db/610434b6ec4940628fc1c985b44e7af6 [2020-09-04 22:06:29,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:06:29,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:06:29,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:06:29,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:06:29,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:06:29,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:06:29" (1/1) ... [2020-09-04 22:06:29,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fc4fd3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29, skipping insertion in model container [2020-09-04 22:06:29,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:06:29" (1/1) ... [2020-09-04 22:06:29,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:06:29,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:06:29,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:06:29,643 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:06:29,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:06:29,689 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:06:29,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29 WrapperNode [2020-09-04 22:06:29,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:06:29,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:06:29,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:06:29,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:06:29,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29" (1/1) ... [2020-09-04 22:06:29,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29" (1/1) ... [2020-09-04 22:06:29,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29" (1/1) ... [2020-09-04 22:06:29,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29" (1/1) ... [2020-09-04 22:06:29,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29" (1/1) ... [2020-09-04 22:06:29,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29" (1/1) ... [2020-09-04 22:06:29,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29" (1/1) ... [2020-09-04 22:06:29,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:06:29,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:06:29,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:06:29,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:06:29,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29" (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 [2020-09-04 22:06:29,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:06:29,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:06:29,907 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-04 22:06:29,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:06:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:06:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 22:06:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 22:06:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 22:06:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 22:06:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:06:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 22:06:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 22:06:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 22:06:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 22:06:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:06:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:06:30,307 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:06:30,308 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 22:06:30,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:06:30 BoogieIcfgContainer [2020-09-04 22:06:30,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:06:30,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:06:30,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:06:30,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:06:30,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:06:29" (1/3) ... [2020-09-04 22:06:30,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b95452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:06:30, skipping insertion in model container [2020-09-04 22:06:30,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:29" (2/3) ... [2020-09-04 22:06:30,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b95452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:06:30, skipping insertion in model container [2020-09-04 22:06:30,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:06:30" (3/3) ... [2020-09-04 22:06:30,333 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-09-04 22:06:30,344 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:06:30,354 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 22:06:30,375 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 22:06:30,402 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:06:30,402 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:06:30,403 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:06:30,403 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:06:30,403 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:06:30,403 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:06:30,403 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:06:30,403 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:06:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-09-04 22:06:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-04 22:06:30,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:30,440 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:30,440 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:30,448 INFO L82 PathProgramCache]: Analyzing trace with hash 144198137, now seen corresponding path program 1 times [2020-09-04 22:06:30,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:30,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625861370] [2020-09-04 22:06:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-04 22:06:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:30,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625861370] [2020-09-04 22:06:30,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:06:30,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:06:30,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174879635] [2020-09-04 22:06:30,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:06:30,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:30,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:06:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:06:30,765 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 3 states. [2020-09-04 22:06:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:30,984 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-09-04 22:06:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:06:30,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-09-04 22:06:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:31,001 INFO L225 Difference]: With dead ends: 124 [2020-09-04 22:06:31,001 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 22:06:31,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:06:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 22:06:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-04 22:06:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 22:06:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-04 22:06:31,067 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 44 [2020-09-04 22:06:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:31,068 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-04 22:06:31,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:06:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-04 22:06:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-04 22:06:31,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:31,071 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:31,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:06:31,072 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:31,072 INFO L82 PathProgramCache]: Analyzing trace with hash 608042528, now seen corresponding path program 1 times [2020-09-04 22:06:31,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:31,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713462789] [2020-09-04 22:06:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-04 22:06:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:31,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713462789] [2020-09-04 22:06:31,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:06:31,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 22:06:31,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526048864] [2020-09-04 22:06:31,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 22:06:31,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 22:06:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 22:06:31,195 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 4 states. [2020-09-04 22:06:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:31,357 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-09-04 22:06:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 22:06:31,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-09-04 22:06:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:31,360 INFO L225 Difference]: With dead ends: 104 [2020-09-04 22:06:31,360 INFO L226 Difference]: Without dead ends: 69 [2020-09-04 22:06:31,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 22:06:31,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-04 22:06:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-09-04 22:06:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-04 22:06:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-09-04 22:06:31,376 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 46 [2020-09-04 22:06:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:31,376 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-09-04 22:06:31,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 22:06:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-09-04 22:06:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-04 22:06:31,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:31,379 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, 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] [2020-09-04 22:06:31,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:06:31,380 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:31,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1644606330, now seen corresponding path program 1 times [2020-09-04 22:06:31,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:31,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735991338] [2020-09-04 22:06:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 22:06:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:31,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735991338] [2020-09-04 22:06:31,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:31,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 22:06:31,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614678465] [2020-09-04 22:06:31,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 22:06:31,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:31,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 22:06:31,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 22:06:31,528 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 6 states. [2020-09-04 22:06:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:31,713 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-09-04 22:06:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 22:06:31,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-09-04 22:06:31,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:31,715 INFO L225 Difference]: With dead ends: 114 [2020-09-04 22:06:31,715 INFO L226 Difference]: Without dead ends: 79 [2020-09-04 22:06:31,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 22:06:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-04 22:06:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-09-04 22:06:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-04 22:06:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-09-04 22:06:31,728 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 56 [2020-09-04 22:06:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:31,728 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-09-04 22:06:31,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 22:06:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-09-04 22:06:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-04 22:06:31,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:31,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:31,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 22:06:31,731 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:31,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:31,732 INFO L82 PathProgramCache]: Analyzing trace with hash 278397012, now seen corresponding path program 2 times [2020-09-04 22:06:31,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:31,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801450714] [2020-09-04 22:06:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-04 22:06:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:31,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801450714] [2020-09-04 22:06:31,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:31,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 22:06:31,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252123408] [2020-09-04 22:06:31,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 22:06:31,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:31,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 22:06:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 22:06:31,938 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 8 states. [2020-09-04 22:06:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:32,138 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-09-04 22:06:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 22:06:32,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-09-04 22:06:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:32,140 INFO L225 Difference]: With dead ends: 124 [2020-09-04 22:06:32,140 INFO L226 Difference]: Without dead ends: 89 [2020-09-04 22:06:32,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-04 22:06:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-04 22:06:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-09-04 22:06:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-04 22:06:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-04 22:06:32,154 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 66 [2020-09-04 22:06:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:32,155 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-04 22:06:32,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 22:06:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-04 22:06:32,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-04 22:06:32,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:32,157 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:32,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 22:06:32,157 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:32,158 INFO L82 PathProgramCache]: Analyzing trace with hash 767198382, now seen corresponding path program 3 times [2020-09-04 22:06:32,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:32,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219970133] [2020-09-04 22:06:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:32,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:32,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-04 22:06:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:32,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219970133] [2020-09-04 22:06:32,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:32,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 22:06:32,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209520283] [2020-09-04 22:06:32,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 22:06:32,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:32,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 22:06:32,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 22:06:32,344 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 10 states. [2020-09-04 22:06:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:32,655 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-09-04 22:06:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 22:06:32,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-09-04 22:06:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:32,657 INFO L225 Difference]: With dead ends: 134 [2020-09-04 22:06:32,658 INFO L226 Difference]: Without dead ends: 99 [2020-09-04 22:06:32,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:06:32,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-04 22:06:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-09-04 22:06:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-04 22:06:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-09-04 22:06:32,671 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 76 [2020-09-04 22:06:32,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:32,671 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-09-04 22:06:32,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 22:06:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-09-04 22:06:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 22:06:32,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:32,673 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:32,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 22:06:32,674 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:32,674 INFO L82 PathProgramCache]: Analyzing trace with hash 216981640, now seen corresponding path program 4 times [2020-09-04 22:06:32,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:32,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092869607] [2020-09-04 22:06:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:32,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:32,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-04 22:06:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:32,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092869607] [2020-09-04 22:06:32,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:32,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 22:06:32,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204873087] [2020-09-04 22:06:32,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 22:06:32,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:32,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 22:06:32,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-04 22:06:32,855 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 12 states. [2020-09-04 22:06:33,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:33,109 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-09-04 22:06:33,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 22:06:33,110 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-09-04 22:06:33,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:33,112 INFO L225 Difference]: With dead ends: 144 [2020-09-04 22:06:33,112 INFO L226 Difference]: Without dead ends: 109 [2020-09-04 22:06:33,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-04 22:06:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-04 22:06:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-09-04 22:06:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-04 22:06:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-09-04 22:06:33,125 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 86 [2020-09-04 22:06:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:33,125 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-09-04 22:06:33,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 22:06:33,126 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-09-04 22:06:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 22:06:33,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:33,128 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:33,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 22:06:33,128 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:33,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1855081502, now seen corresponding path program 5 times [2020-09-04 22:06:33,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:33,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721045062] [2020-09-04 22:06:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:33,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:33,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-04 22:06:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:33,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721045062] [2020-09-04 22:06:33,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:33,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-04 22:06:33,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092662399] [2020-09-04 22:06:33,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 22:06:33,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:33,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 22:06:33,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-04 22:06:33,404 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 14 states. [2020-09-04 22:06:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:33,801 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2020-09-04 22:06:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 22:06:33,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2020-09-04 22:06:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:33,805 INFO L225 Difference]: With dead ends: 154 [2020-09-04 22:06:33,805 INFO L226 Difference]: Without dead ends: 119 [2020-09-04 22:06:33,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-04 22:06:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-04 22:06:33,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2020-09-04 22:06:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-04 22:06:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-09-04 22:06:33,819 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 96 [2020-09-04 22:06:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:33,819 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-09-04 22:06:33,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 22:06:33,819 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-09-04 22:06:33,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-04 22:06:33,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:33,821 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:33,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 22:06:33,822 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:33,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:33,822 INFO L82 PathProgramCache]: Analyzing trace with hash -400056644, now seen corresponding path program 6 times [2020-09-04 22:06:33,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:33,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717154601] [2020-09-04 22:06:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:34,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:34,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-04 22:06:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:34,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717154601] [2020-09-04 22:06:34,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:34,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 22:06:34,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776320440] [2020-09-04 22:06:34,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 22:06:34,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:34,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 22:06:34,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:06:34,061 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 16 states. [2020-09-04 22:06:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:34,542 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2020-09-04 22:06:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 22:06:34,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2020-09-04 22:06:34,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:34,544 INFO L225 Difference]: With dead ends: 164 [2020-09-04 22:06:34,544 INFO L226 Difference]: Without dead ends: 129 [2020-09-04 22:06:34,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-04 22:06:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-04 22:06:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2020-09-04 22:06:34,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-04 22:06:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-09-04 22:06:34,558 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 106 [2020-09-04 22:06:34,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:34,558 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-09-04 22:06:34,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 22:06:34,558 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-09-04 22:06:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 22:06:34,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:34,561 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:34,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 22:06:34,561 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:34,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1044037354, now seen corresponding path program 7 times [2020-09-04 22:06:34,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:34,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989008550] [2020-09-04 22:06:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:34,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:34,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-04 22:06:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:34,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989008550] [2020-09-04 22:06:34,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:34,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 22:06:34,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636430205] [2020-09-04 22:06:34,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 22:06:34,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:34,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 22:06:34,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-04 22:06:34,825 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 18 states. [2020-09-04 22:06:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:35,377 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-09-04 22:06:35,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 22:06:35,378 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 116 [2020-09-04 22:06:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:35,380 INFO L225 Difference]: With dead ends: 174 [2020-09-04 22:06:35,380 INFO L226 Difference]: Without dead ends: 139 [2020-09-04 22:06:35,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-04 22:06:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-04 22:06:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-09-04 22:06:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-04 22:06:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2020-09-04 22:06:35,391 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 116 [2020-09-04 22:06:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:35,392 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2020-09-04 22:06:35,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 22:06:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2020-09-04 22:06:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 22:06:35,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:35,394 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:35,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 22:06:35,395 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:35,395 INFO L82 PathProgramCache]: Analyzing trace with hash 212286192, now seen corresponding path program 8 times [2020-09-04 22:06:35,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:35,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120969403] [2020-09-04 22:06:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:35,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:35,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-04 22:06:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:35,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120969403] [2020-09-04 22:06:35,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:35,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 22:06:35,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443185712] [2020-09-04 22:06:35,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 22:06:35,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:35,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 22:06:35,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-04 22:06:35,717 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 20 states. [2020-09-04 22:06:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:36,303 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2020-09-04 22:06:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 22:06:36,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 126 [2020-09-04 22:06:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:36,304 INFO L225 Difference]: With dead ends: 184 [2020-09-04 22:06:36,305 INFO L226 Difference]: Without dead ends: 149 [2020-09-04 22:06:36,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 22:06:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-04 22:06:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2020-09-04 22:06:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-04 22:06:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-09-04 22:06:36,317 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 126 [2020-09-04 22:06:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:36,318 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-09-04 22:06:36,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 22:06:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-09-04 22:06:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 22:06:36,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:36,320 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:36,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 22:06:36,320 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:36,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:36,321 INFO L82 PathProgramCache]: Analyzing trace with hash 786836554, now seen corresponding path program 9 times [2020-09-04 22:06:36,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:36,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247699104] [2020-09-04 22:06:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:36,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:36,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-04 22:06:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:36,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247699104] [2020-09-04 22:06:36,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:36,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 22:06:36,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843139713] [2020-09-04 22:06:36,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 22:06:36,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:36,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 22:06:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-04 22:06:36,763 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 22 states. [2020-09-04 22:06:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:37,581 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-09-04 22:06:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 22:06:37,583 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-09-04 22:06:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:37,585 INFO L225 Difference]: With dead ends: 186 [2020-09-04 22:06:37,586 INFO L226 Difference]: Without dead ends: 151 [2020-09-04 22:06:37,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 22:06:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-04 22:06:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-09-04 22:06:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-04 22:06:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-09-04 22:06:37,607 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 136 [2020-09-04 22:06:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:37,609 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-09-04 22:06:37,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 22:06:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-09-04 22:06:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 22:06:37,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:37,612 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:37,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 22:06:37,613 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:37,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1068321500, now seen corresponding path program 10 times [2020-09-04 22:06:37,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:37,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777218695] [2020-09-04 22:06:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:54,589 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 9 [2020-09-04 22:07:54,975 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 8 [2020-09-04 22:07:56,121 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 8 [2020-09-04 22:07:57,231 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 11 [2020-09-04 22:08:02,691 WARN L193 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 1070 DAG size of output: 8 [2020-09-04 22:08:07,443 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 1063 DAG size of output: 8 [2020-09-04 22:08:43,339 WARN L193 SmtUtils]: Spent 34.67 s on a formula simplification. DAG size of input: 2453 DAG size of output: 8 [2020-09-04 22:09:12,022 WARN L193 SmtUtils]: Spent 27.27 s on a formula simplification. DAG size of input: 2458 DAG size of output: 8 [2020-09-04 22:12:14,516 WARN L193 SmtUtils]: Spent 2.98 m on a formula simplification. DAG size of input: 6202 DAG size of output: 8 [2020-09-04 22:12:14,942 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2020-09-04 22:12:15,211 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2020-09-04 22:12:15,438 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-09-04 22:12:15,611 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-09-04 22:12:15,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:12:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:12:15,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-04 22:12:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:12:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 22:12:15,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777218695] [2020-09-04 22:12:15,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:12:15,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-04 22:12:15,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067712455] [2020-09-04 22:12:15,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 22:12:15,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:12:15,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 22:12:15,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-09-04 22:12:15,884 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 31 states. [2020-09-04 22:12:18,519 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-09-04 22:12:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:12:19,103 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2020-09-04 22:12:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 22:12:19,104 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2020-09-04 22:12:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:12:19,106 INFO L225 Difference]: With dead ends: 172 [2020-09-04 22:12:19,106 INFO L226 Difference]: Without dead ends: 156 [2020-09-04 22:12:19,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 261.7s TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 22:12:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-04 22:12:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-09-04 22:12:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-04 22:12:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-09-04 22:12:19,119 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 146 [2020-09-04 22:12:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:12:19,120 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-09-04 22:12:19,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 22:12:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-09-04 22:12:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-04 22:12:19,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:12:19,122 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:12:19,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 22:12:19,123 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:12:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:12:19,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1165083452, now seen corresponding path program 1 times [2020-09-04 22:12:19,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:12:19,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192723375] [2020-09-04 22:12:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:12:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:12:29,101 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 8 [2020-09-04 22:12:29,312 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 8 [2020-09-04 22:12:30,248 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 8 [2020-09-04 22:12:31,233 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 8 [2020-09-04 22:12:34,514 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 543 DAG size of output: 8 [2020-09-04 22:12:34,972 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 27 [2020-09-04 22:12:35,182 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2020-09-04 22:12:35,416 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-09-04 22:12:35,605 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-09-04 22:12:36,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:12:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:12:36,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-04 22:12:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:12:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 22:12:36,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192723375] [2020-09-04 22:12:36,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:12:36,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-04 22:12:36,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26011029] [2020-09-04 22:12:36,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-04 22:12:36,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:12:36,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-04 22:12:36,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 22:12:36,621 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 41 states. [2020-09-04 22:12:39,789 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-09-04 22:12:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:12:41,573 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2020-09-04 22:12:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-04 22:12:41,579 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 152 [2020-09-04 22:12:41,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:12:41,582 INFO L225 Difference]: With dead ends: 169 [2020-09-04 22:12:41,582 INFO L226 Difference]: Without dead ends: 162 [2020-09-04 22:12:41,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=377, Invalid=5785, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 22:12:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-04 22:12:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-09-04 22:12:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-04 22:12:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2020-09-04 22:12:41,620 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 152 [2020-09-04 22:12:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:12:41,621 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2020-09-04 22:12:41,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-04 22:12:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2020-09-04 22:12:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-04 22:12:41,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:12:41,623 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:12:41,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 22:12:41,623 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:12:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:12:41,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1004282028, now seen corresponding path program 2 times [2020-09-04 22:12:41,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:12:41,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034470606] [2020-09-04 22:12:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:12:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:13:14,503 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 8 [2020-09-04 22:13:14,966 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 8 [2020-09-04 22:13:17,414 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 690 DAG size of output: 8 [2020-09-04 22:13:19,435 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 692 DAG size of output: 8 [2020-09-04 22:13:34,143 WARN L193 SmtUtils]: Spent 13.71 s on a formula simplification. DAG size of input: 2042 DAG size of output: 8 [2020-09-04 22:13:51,377 WARN L193 SmtUtils]: Spent 16.16 s on a formula simplification. DAG size of input: 2089 DAG size of output: 8 [2020-09-04 22:14:41,720 WARN L193 SmtUtils]: Spent 48.36 s on a formula simplification. DAG size of input: 3922 DAG size of output: 8 [2020-09-04 22:15:38,546 WARN L193 SmtUtils]: Spent 54.60 s on a formula simplification. DAG size of input: 4069 DAG size of output: 8 [2020-09-04 22:17:33,541 WARN L193 SmtUtils]: Spent 1.86 m on a formula simplification. DAG size of input: 5805 DAG size of output: 8 [2020-09-04 22:17:33,970 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 22 [2020-09-04 22:17:34,451 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2020-09-04 22:17:35,028 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 31 [2020-09-04 22:17:35,506 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 25 [2020-09-04 22:17:35,845 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-09-04 22:17:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:17:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:17:36,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-09-04 22:17:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:17:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 22:17:36,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034470606] [2020-09-04 22:17:36,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:17:36,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-04 22:17:36,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200180701] [2020-09-04 22:17:36,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-04 22:17:36,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:17:36,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-04 22:17:36,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 22:17:36,447 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 33 states. [2020-09-04 22:17:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:17:42,008 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2020-09-04 22:17:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-04 22:17:42,011 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 158 [2020-09-04 22:17:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:17:42,013 INFO L225 Difference]: With dead ends: 184 [2020-09-04 22:17:42,013 INFO L226 Difference]: Without dead ends: 168 [2020-09-04 22:17:42,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 263.0s TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 22:17:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-04 22:17:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2020-09-04 22:17:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-04 22:17:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2020-09-04 22:17:42,027 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 158 [2020-09-04 22:17:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:17:42,027 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2020-09-04 22:17:42,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-04 22:17:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2020-09-04 22:17:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-09-04 22:17:42,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:17:42,029 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:17:42,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 22:17:42,030 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:17:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:17:42,030 INFO L82 PathProgramCache]: Analyzing trace with hash 426150252, now seen corresponding path program 3 times [2020-09-04 22:17:42,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:17:42,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086937074] [2020-09-04 22:17:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:17:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:18:24,648 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2020-09-04 22:18:24,821 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 11 [2020-09-04 22:18:25,953 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 11 [2020-09-04 22:18:26,715 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 8 [2020-09-04 22:18:30,261 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 811 DAG size of output: 8 [2020-09-04 22:18:33,395 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 818 DAG size of output: 8 [2020-09-04 22:19:08,856 WARN L193 SmtUtils]: Spent 32.98 s on a formula simplification. DAG size of input: 4189 DAG size of output: 8 [2020-09-04 22:19:47,703 WARN L193 SmtUtils]: Spent 36.08 s on a formula simplification. DAG size of input: 4230 DAG size of output: 8