/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:08:16,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:08:16,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:08:16,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-24 15:08:16,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:08:16,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:08:16,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:08:16,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:08:16,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:08:16,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:08:16,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:08:16,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:08:16,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:08:16,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:08:16,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:08:16,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:08:16,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:08:16,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:08:16,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:08:16,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:08:16,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 15:08:16,872 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:08:16,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:08:16,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:08:16,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:08:16,874 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:08:16,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:08:16,874 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:08:16,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:08:16,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:08:16,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:08:16,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:08:16,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:08:16,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:08:16,879 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:08:16,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:08:16,879 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:08:16,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:08:16,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:08:16,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:08:16,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:08:16,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:08:16,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:08:16,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:08:16,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:08:16,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:08:16,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:08:16,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:08:16,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:08:16,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:08:16,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:08:17,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:08:17,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:08:17,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:08:17,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:08:17,391 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:08:17,392 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-09-24 15:08:17,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fa4f40a3/bef8f72095ed45399971355c832fba75/FLAG566b68e4e [2020-09-24 15:08:18,077 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:08:18,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-09-24 15:08:18,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fa4f40a3/bef8f72095ed45399971355c832fba75/FLAG566b68e4e [2020-09-24 15:08:18,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fa4f40a3/bef8f72095ed45399971355c832fba75 [2020-09-24 15:08:18,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:08:18,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:08:18,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:08:18,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:08:18,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:08:18,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:08:18" (1/1) ... [2020-09-24 15:08:18,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@edcea15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18, skipping insertion in model container [2020-09-24 15:08:18,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:08:18" (1/1) ... [2020-09-24 15:08:18,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:08:18,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:08:18,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:08:18,786 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:08:18,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:08:18,825 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:08:18,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18 WrapperNode [2020-09-24 15:08:18,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:08:18,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:08:18,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:08:18,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:08:18,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18" (1/1) ... [2020-09-24 15:08:18,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18" (1/1) ... [2020-09-24 15:08:18,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18" (1/1) ... [2020-09-24 15:08:18,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18" (1/1) ... [2020-09-24 15:08:18,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18" (1/1) ... [2020-09-24 15:08:18,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18" (1/1) ... [2020-09-24 15:08:18,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18" (1/1) ... [2020-09-24 15:08:18,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:08:18,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:08:18,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:08:18,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:08:18,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18" (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 [2020-09-24 15:08:19,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:08:19,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:08:19,046 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 15:08:19,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 15:08:19,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:08:19,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:08:19,047 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 15:08:19,047 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 15:08:19,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:08:19,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:08:19,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:08:19,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:08:19,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:08:19,380 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:08:19,381 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 15:08:19,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:08:19 BoogieIcfgContainer [2020-09-24 15:08:19,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:08:19,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:08:19,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:08:19,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:08:19,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:08:18" (1/3) ... [2020-09-24 15:08:19,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24ff917a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:08:19, skipping insertion in model container [2020-09-24 15:08:19,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:18" (2/3) ... [2020-09-24 15:08:19,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24ff917a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:08:19, skipping insertion in model container [2020-09-24 15:08:19,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:08:19" (3/3) ... [2020-09-24 15:08:19,398 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-09-24 15:08:19,410 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:08:19,422 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:08:19,446 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:08:19,480 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:08:19,481 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:08:19,481 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:08:19,481 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:08:19,481 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:08:19,482 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:08:19,482 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:08:19,482 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:08:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-09-24 15:08:19,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 15:08:19,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:19,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:19,517 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:19,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:19,525 INFO L82 PathProgramCache]: Analyzing trace with hash -537390573, now seen corresponding path program 1 times [2020-09-24 15:08:19,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:19,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026462616] [2020-09-24 15:08:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:19,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026462616] [2020-09-24 15:08:19,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:19,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 15:08:19,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054454252] [2020-09-24 15:08:19,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 15:08:19,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:19,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 15:08:19,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 15:08:19,713 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 2 states. [2020-09-24 15:08:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:19,758 INFO L93 Difference]: Finished difference Result 134 states and 203 transitions. [2020-09-24 15:08:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 15:08:19,760 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-09-24 15:08:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:19,775 INFO L225 Difference]: With dead ends: 134 [2020-09-24 15:08:19,775 INFO L226 Difference]: Without dead ends: 69 [2020-09-24 15:08:19,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 15:08:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-24 15:08:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-09-24 15:08:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 15:08:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-09-24 15:08:19,850 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 19 [2020-09-24 15:08:19,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:19,851 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-09-24 15:08:19,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 15:08:19,852 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-09-24 15:08:19,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 15:08:19,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:19,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:19,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:08:19,854 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:19,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:19,854 INFO L82 PathProgramCache]: Analyzing trace with hash 471335344, now seen corresponding path program 1 times [2020-09-24 15:08:19,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:19,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780611795] [2020-09-24 15:08:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:20,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780611795] [2020-09-24 15:08:20,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:20,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:08:20,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203251295] [2020-09-24 15:08:20,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:08:20,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:08:20,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:08:20,011 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 5 states. [2020-09-24 15:08:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:20,214 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2020-09-24 15:08:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:08:20,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-24 15:08:20,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:20,217 INFO L225 Difference]: With dead ends: 91 [2020-09-24 15:08:20,217 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 15:08:20,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:08:20,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 15:08:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-09-24 15:08:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-24 15:08:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2020-09-24 15:08:20,239 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 20 [2020-09-24 15:08:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:20,240 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2020-09-24 15:08:20,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:08:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2020-09-24 15:08:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 15:08:20,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:20,242 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:20,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:08:20,243 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:20,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:20,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1383579147, now seen corresponding path program 1 times [2020-09-24 15:08:20,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:20,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280402491] [2020-09-24 15:08:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-24 15:08:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:20,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280402491] [2020-09-24 15:08:20,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:20,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:08:20,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816574473] [2020-09-24 15:08:20,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:08:20,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:20,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:08:20,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:08:20,355 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand 5 states. [2020-09-24 15:08:20,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:20,465 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2020-09-24 15:08:20,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:08:20,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-24 15:08:20,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:20,470 INFO L225 Difference]: With dead ends: 88 [2020-09-24 15:08:20,470 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 15:08:20,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:08:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 15:08:20,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-09-24 15:08:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 15:08:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-09-24 15:08:20,484 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 25 [2020-09-24 15:08:20,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:20,485 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-09-24 15:08:20,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:08:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-09-24 15:08:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 15:08:20,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:20,487 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 15:08:20,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:08:20,487 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:20,488 INFO L82 PathProgramCache]: Analyzing trace with hash 344115466, now seen corresponding path program 1 times [2020-09-24 15:08:20,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:20,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089302042] [2020-09-24 15:08:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:20,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089302042] [2020-09-24 15:08:20,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:20,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:08:20,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655293554] [2020-09-24 15:08:20,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:20,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:20,606 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 7 states. [2020-09-24 15:08:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:20,790 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-09-24 15:08:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:20,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-24 15:08:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:20,793 INFO L225 Difference]: With dead ends: 90 [2020-09-24 15:08:20,793 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 15:08:20,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 15:08:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-09-24 15:08:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 15:08:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-09-24 15:08:20,806 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 28 [2020-09-24 15:08:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:20,806 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-09-24 15:08:20,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-09-24 15:08:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 15:08:20,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:20,809 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 15:08:20,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:08:20,809 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:20,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1469174755, now seen corresponding path program 1 times [2020-09-24 15:08:20,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:20,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352181744] [2020-09-24 15:08:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 15:08:20,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352181744] [2020-09-24 15:08:20,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:20,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:08:20,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334069826] [2020-09-24 15:08:20,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:20,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:20,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:20,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:20,915 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 7 states. [2020-09-24 15:08:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:21,083 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-24 15:08:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:21,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-24 15:08:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:21,086 INFO L225 Difference]: With dead ends: 94 [2020-09-24 15:08:21,086 INFO L226 Difference]: Without dead ends: 85 [2020-09-24 15:08:21,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-24 15:08:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-09-24 15:08:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 15:08:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-09-24 15:08:21,098 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 38 [2020-09-24 15:08:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:21,098 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-09-24 15:08:21,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-09-24 15:08:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 15:08:21,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:21,100 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 15:08:21,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:08:21,101 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash 859677550, now seen corresponding path program 1 times [2020-09-24 15:08:21,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:21,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736142980] [2020-09-24 15:08:21,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 15:08:21,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736142980] [2020-09-24 15:08:21,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:21,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:08:21,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339250875] [2020-09-24 15:08:21,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:21,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:21,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:21,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:21,205 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 7 states. [2020-09-24 15:08:21,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:21,338 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-09-24 15:08:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:21,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-09-24 15:08:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:21,340 INFO L225 Difference]: With dead ends: 91 [2020-09-24 15:08:21,341 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 15:08:21,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 15:08:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-09-24 15:08:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 15:08:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-09-24 15:08:21,352 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 41 [2020-09-24 15:08:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:21,353 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-09-24 15:08:21,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-09-24 15:08:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 15:08:21,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:21,355 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:21,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:08:21,356 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash -943144682, now seen corresponding path program 1 times [2020-09-24 15:08:21,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:21,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778156921] [2020-09-24 15:08:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 15:08:21,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778156921] [2020-09-24 15:08:21,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:21,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:08:21,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670654261] [2020-09-24 15:08:21,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:21,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:21,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:21,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:21,449 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 7 states. [2020-09-24 15:08:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:21,597 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2020-09-24 15:08:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:21,597 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-09-24 15:08:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:21,599 INFO L225 Difference]: With dead ends: 120 [2020-09-24 15:08:21,600 INFO L226 Difference]: Without dead ends: 118 [2020-09-24 15:08:21,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-24 15:08:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2020-09-24 15:08:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-24 15:08:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-09-24 15:08:21,614 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 44 [2020-09-24 15:08:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:21,615 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-09-24 15:08:21,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-09-24 15:08:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 15:08:21,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:21,617 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2020-09-24 15:08:21,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:08:21,618 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:21,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1177695863, now seen corresponding path program 2 times [2020-09-24 15:08:21,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:21,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079508157] [2020-09-24 15:08:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:08:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-24 15:08:21,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079508157] [2020-09-24 15:08:21,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:21,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:08:21,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439902250] [2020-09-24 15:08:21,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:08:21,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:08:21,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:08:21,757 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 8 states. [2020-09-24 15:08:21,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:21,903 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-09-24 15:08:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:08:21,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-09-24 15:08:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:21,906 INFO L225 Difference]: With dead ends: 115 [2020-09-24 15:08:21,906 INFO L226 Difference]: Without dead ends: 113 [2020-09-24 15:08:21,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:08:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-24 15:08:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-09-24 15:08:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 15:08:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2020-09-24 15:08:21,924 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 46 [2020-09-24 15:08:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:21,925 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2020-09-24 15:08:21,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:08:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2020-09-24 15:08:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 15:08:21,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:21,932 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-09-24 15:08:21,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:08:21,932 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:21,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:21,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1826770767, now seen corresponding path program 1 times [2020-09-24 15:08:21,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:21,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368586276] [2020-09-24 15:08:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 15:08:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 15:08:22,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368586276] [2020-09-24 15:08:22,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:22,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:08:22,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661454076] [2020-09-24 15:08:22,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:08:22,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:22,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:08:22,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:08:22,083 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand 8 states. [2020-09-24 15:08:22,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:22,283 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2020-09-24 15:08:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:08:22,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-09-24 15:08:22,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:22,285 INFO L225 Difference]: With dead ends: 128 [2020-09-24 15:08:22,286 INFO L226 Difference]: Without dead ends: 123 [2020-09-24 15:08:22,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:08:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-24 15:08:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-09-24 15:08:22,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-24 15:08:22,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2020-09-24 15:08:22,295 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 49 [2020-09-24 15:08:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:22,296 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2020-09-24 15:08:22,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:08:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2020-09-24 15:08:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 15:08:22,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:22,298 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-09-24 15:08:22,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:08:22,298 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:22,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1519048418, now seen corresponding path program 1 times [2020-09-24 15:08:22,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:22,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838581183] [2020-09-24 15:08:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 15:08:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 15:08:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 15:08:22,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838581183] [2020-09-24 15:08:22,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:22,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:08:22,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869968449] [2020-09-24 15:08:22,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:22,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:22,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:22,413 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand 9 states. [2020-09-24 15:08:22,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:22,606 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2020-09-24 15:08:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:08:22,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-09-24 15:08:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:22,609 INFO L225 Difference]: With dead ends: 135 [2020-09-24 15:08:22,609 INFO L226 Difference]: Without dead ends: 133 [2020-09-24 15:08:22,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:08:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-24 15:08:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2020-09-24 15:08:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-24 15:08:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2020-09-24 15:08:22,619 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 58 [2020-09-24 15:08:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:22,619 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2020-09-24 15:08:22,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2020-09-24 15:08:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 15:08:22,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:22,621 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-09-24 15:08:22,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:08:22,622 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:22,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1733407875, now seen corresponding path program 1 times [2020-09-24 15:08:22,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:22,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726991880] [2020-09-24 15:08:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:08:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 15:08:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 15:08:22,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726991880] [2020-09-24 15:08:22,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:22,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:08:22,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370819557] [2020-09-24 15:08:22,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:22,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:22,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:22,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:22,727 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand 9 states. [2020-09-24 15:08:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:22,956 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2020-09-24 15:08:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:08:22,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-09-24 15:08:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:22,958 INFO L225 Difference]: With dead ends: 158 [2020-09-24 15:08:22,959 INFO L226 Difference]: Without dead ends: 156 [2020-09-24 15:08:22,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:08:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-24 15:08:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2020-09-24 15:08:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-24 15:08:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2020-09-24 15:08:22,971 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 62 [2020-09-24 15:08:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:22,971 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2020-09-24 15:08:22,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:22,972 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2020-09-24 15:08:22,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 15:08:22,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:22,973 INFO L422 BasicCegarLoop]: trace histogram [6, 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, 1] [2020-09-24 15:08:22,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:08:22,973 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1967257859, now seen corresponding path program 1 times [2020-09-24 15:08:22,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:22,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879852530] [2020-09-24 15:08:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 15:08:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 15:08:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-24 15:08:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-24 15:08:23,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879852530] [2020-09-24 15:08:23,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:23,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:08:23,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787416289] [2020-09-24 15:08:23,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:23,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:23,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:23,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:23,143 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand 9 states. [2020-09-24 15:08:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:23,356 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-09-24 15:08:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:08:23,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-09-24 15:08:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:23,358 INFO L225 Difference]: With dead ends: 158 [2020-09-24 15:08:23,358 INFO L226 Difference]: Without dead ends: 156 [2020-09-24 15:08:23,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:08:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-24 15:08:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2020-09-24 15:08:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-24 15:08:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 174 transitions. [2020-09-24 15:08:23,373 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 174 transitions. Word has length 63 [2020-09-24 15:08:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:23,374 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 174 transitions. [2020-09-24 15:08:23,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 174 transitions. [2020-09-24 15:08:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 15:08:23,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:23,376 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-09-24 15:08:23,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:08:23,376 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:23,376 INFO L82 PathProgramCache]: Analyzing trace with hash -822659134, now seen corresponding path program 1 times [2020-09-24 15:08:23,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:23,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527385708] [2020-09-24 15:08:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 15:08:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 15:08:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 15:08:23,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527385708] [2020-09-24 15:08:23,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:23,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:08:23,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158114276] [2020-09-24 15:08:23,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:23,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:23,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:23,503 INFO L87 Difference]: Start difference. First operand 152 states and 174 transitions. Second operand 9 states. [2020-09-24 15:08:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:23,733 INFO L93 Difference]: Finished difference Result 187 states and 216 transitions. [2020-09-24 15:08:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:08:23,734 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-09-24 15:08:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:23,736 INFO L225 Difference]: With dead ends: 187 [2020-09-24 15:08:23,736 INFO L226 Difference]: Without dead ends: 185 [2020-09-24 15:08:23,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:08:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-24 15:08:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2020-09-24 15:08:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-24 15:08:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 205 transitions. [2020-09-24 15:08:23,755 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 205 transitions. Word has length 65 [2020-09-24 15:08:23,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:23,755 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 205 transitions. [2020-09-24 15:08:23,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 205 transitions. [2020-09-24 15:08:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 15:08:23,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:23,757 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2020-09-24 15:08:23,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:08:23,757 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:23,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:23,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1510377470, now seen corresponding path program 1 times [2020-09-24 15:08:23,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:23,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981483316] [2020-09-24 15:08:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:08:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 15:08:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 15:08:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-09-24 15:08:23,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981483316] [2020-09-24 15:08:23,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:23,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:08:23,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156159927] [2020-09-24 15:08:23,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:23,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:23,939 INFO L87 Difference]: Start difference. First operand 177 states and 205 transitions. Second operand 9 states. [2020-09-24 15:08:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:24,155 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2020-09-24 15:08:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:08:24,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-09-24 15:08:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:24,157 INFO L225 Difference]: With dead ends: 192 [2020-09-24 15:08:24,157 INFO L226 Difference]: Without dead ends: 187 [2020-09-24 15:08:24,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:08:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-24 15:08:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2020-09-24 15:08:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-09-24 15:08:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 208 transitions. [2020-09-24 15:08:24,176 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 208 transitions. Word has length 67 [2020-09-24 15:08:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:24,176 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 208 transitions. [2020-09-24 15:08:24,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 208 transitions. [2020-09-24 15:08:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 15:08:24,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:24,184 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 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] [2020-09-24 15:08:24,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 15:08:24,185 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash 869213219, now seen corresponding path program 2 times [2020-09-24 15:08:24,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:24,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704217019] [2020-09-24 15:08:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 15:08:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 15:08:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:08:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-09-24 15:08:24,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704217019] [2020-09-24 15:08:24,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:24,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:08:24,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341318990] [2020-09-24 15:08:24,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:24,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:24,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:24,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:24,345 INFO L87 Difference]: Start difference. First operand 181 states and 208 transitions. Second operand 9 states. [2020-09-24 15:08:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:24,580 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2020-09-24 15:08:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:08:24,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-09-24 15:08:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:24,583 INFO L225 Difference]: With dead ends: 193 [2020-09-24 15:08:24,583 INFO L226 Difference]: Without dead ends: 188 [2020-09-24 15:08:24,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:08:24,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-24 15:08:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2020-09-24 15:08:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-24 15:08:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2020-09-24 15:08:24,602 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 70 [2020-09-24 15:08:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:24,603 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2020-09-24 15:08:24,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2020-09-24 15:08:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 15:08:24,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:24,606 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1] [2020-09-24 15:08:24,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 15:08:24,606 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1269119089, now seen corresponding path program 1 times [2020-09-24 15:08:24,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:24,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449429586] [2020-09-24 15:08:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:08:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 15:08:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 15:08:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 15:08:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-24 15:08:24,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449429586] [2020-09-24 15:08:24,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:24,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 15:08:24,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876487954] [2020-09-24 15:08:24,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:24,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:24,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:24,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:24,758 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand 11 states. [2020-09-24 15:08:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:25,037 INFO L93 Difference]: Finished difference Result 202 states and 228 transitions. [2020-09-24 15:08:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:08:25,038 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-09-24 15:08:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:25,039 INFO L225 Difference]: With dead ends: 202 [2020-09-24 15:08:25,040 INFO L226 Difference]: Without dead ends: 200 [2020-09-24 15:08:25,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:08:25,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-24 15:08:25,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 193. [2020-09-24 15:08:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-09-24 15:08:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2020-09-24 15:08:25,059 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 76 [2020-09-24 15:08:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:25,060 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2020-09-24 15:08:25,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2020-09-24 15:08:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 15:08:25,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:25,062 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2020-09-24 15:08:25,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 15:08:25,063 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1147260786, now seen corresponding path program 1 times [2020-09-24 15:08:25,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:25,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973671310] [2020-09-24 15:08:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 15:08:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 15:08:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:08:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 15:08:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-24 15:08:25,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973671310] [2020-09-24 15:08:25,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:25,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 15:08:25,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767101083] [2020-09-24 15:08:25,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:25,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:25,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:25,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:25,215 INFO L87 Difference]: Start difference. First operand 193 states and 218 transitions. Second operand 11 states. [2020-09-24 15:08:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:25,529 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2020-09-24 15:08:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:08:25,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-09-24 15:08:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:25,532 INFO L225 Difference]: With dead ends: 234 [2020-09-24 15:08:25,532 INFO L226 Difference]: Without dead ends: 232 [2020-09-24 15:08:25,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:08:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-24 15:08:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 223. [2020-09-24 15:08:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-09-24 15:08:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 255 transitions. [2020-09-24 15:08:25,556 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 255 transitions. Word has length 79 [2020-09-24 15:08:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:25,558 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 255 transitions. [2020-09-24 15:08:25,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:25,559 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 255 transitions. [2020-09-24 15:08:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 15:08:25,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:25,561 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2020-09-24 15:08:25,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 15:08:25,561 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:25,562 INFO L82 PathProgramCache]: Analyzing trace with hash 341113206, now seen corresponding path program 2 times [2020-09-24 15:08:25,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:25,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721302897] [2020-09-24 15:08:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 15:08:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 15:08:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-24 15:08:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 15:08:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-24 15:08:25,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721302897] [2020-09-24 15:08:25,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:25,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 15:08:25,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417464313] [2020-09-24 15:08:25,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:25,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:25,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:25,719 INFO L87 Difference]: Start difference. First operand 223 states and 255 transitions. Second operand 11 states. [2020-09-24 15:08:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:25,989 INFO L93 Difference]: Finished difference Result 264 states and 305 transitions. [2020-09-24 15:08:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:08:25,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-09-24 15:08:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:25,994 INFO L225 Difference]: With dead ends: 264 [2020-09-24 15:08:25,994 INFO L226 Difference]: Without dead ends: 262 [2020-09-24 15:08:25,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:08:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-24 15:08:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 223. [2020-09-24 15:08:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-09-24 15:08:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 255 transitions. [2020-09-24 15:08:26,012 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 255 transitions. Word has length 79 [2020-09-24 15:08:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:26,012 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 255 transitions. [2020-09-24 15:08:26,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 255 transitions. [2020-09-24 15:08:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 15:08:26,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:26,015 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:26,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 15:08:26,015 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:26,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1759613834, now seen corresponding path program 1 times [2020-09-24 15:08:26,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:26,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055513555] [2020-09-24 15:08:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:08:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 15:08:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 15:08:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 15:08:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-24 15:08:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-09-24 15:08:26,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055513555] [2020-09-24 15:08:26,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:26,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 15:08:26,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835186693] [2020-09-24 15:08:26,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:08:26,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:26,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:08:26,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:26,190 INFO L87 Difference]: Start difference. First operand 223 states and 255 transitions. Second operand 10 states. [2020-09-24 15:08:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:26,466 INFO L93 Difference]: Finished difference Result 236 states and 268 transitions. [2020-09-24 15:08:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:08:26,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-09-24 15:08:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:26,468 INFO L225 Difference]: With dead ends: 236 [2020-09-24 15:08:26,469 INFO L226 Difference]: Without dead ends: 234 [2020-09-24 15:08:26,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:08:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-24 15:08:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2020-09-24 15:08:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-09-24 15:08:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 260 transitions. [2020-09-24 15:08:26,481 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 260 transitions. Word has length 81 [2020-09-24 15:08:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:26,481 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 260 transitions. [2020-09-24 15:08:26,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:08:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 260 transitions. [2020-09-24 15:08:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 15:08:26,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:26,483 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 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] [2020-09-24 15:08:26,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 15:08:26,484 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash -343631243, now seen corresponding path program 1 times [2020-09-24 15:08:26,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:26,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30636796] [2020-09-24 15:08:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:08:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 15:08:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 15:08:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 15:08:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-24 15:08:26,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30636796] [2020-09-24 15:08:26,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:26,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 15:08:26,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213693654] [2020-09-24 15:08:26,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:26,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:26,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:26,606 INFO L87 Difference]: Start difference. First operand 228 states and 260 transitions. Second operand 11 states. [2020-09-24 15:08:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:26,897 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2020-09-24 15:08:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:08:26,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-09-24 15:08:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:26,899 INFO L225 Difference]: With dead ends: 263 [2020-09-24 15:08:26,899 INFO L226 Difference]: Without dead ends: 261 [2020-09-24 15:08:26,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:08:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-09-24 15:08:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 253. [2020-09-24 15:08:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-09-24 15:08:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 291 transitions. [2020-09-24 15:08:26,914 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 291 transitions. Word has length 83 [2020-09-24 15:08:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:26,914 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 291 transitions. [2020-09-24 15:08:26,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 291 transitions. [2020-09-24 15:08:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 15:08:26,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:26,917 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2020-09-24 15:08:26,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 15:08:26,917 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:26,918 INFO L82 PathProgramCache]: Analyzing trace with hash -857748777, now seen corresponding path program 3 times [2020-09-24 15:08:26,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:26,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486380648] [2020-09-24 15:08:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 15:08:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 15:08:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:08:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 15:08:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-24 15:08:27,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486380648] [2020-09-24 15:08:27,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:27,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:08:27,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267083611] [2020-09-24 15:08:27,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:08:27,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:27,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:08:27,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:27,069 INFO L87 Difference]: Start difference. First operand 253 states and 291 transitions. Second operand 10 states. [2020-09-24 15:08:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:27,452 INFO L93 Difference]: Finished difference Result 262 states and 299 transitions. [2020-09-24 15:08:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:08:27,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-09-24 15:08:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:27,455 INFO L225 Difference]: With dead ends: 262 [2020-09-24 15:08:27,456 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 15:08:27,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:08:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 15:08:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-09-24 15:08:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-24 15:08:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2020-09-24 15:08:27,469 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 84 [2020-09-24 15:08:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:27,469 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2020-09-24 15:08:27,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:08:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2020-09-24 15:08:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-24 15:08:27,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:27,475 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 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] [2020-09-24 15:08:27,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 15:08:27,475 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:27,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1405253968, now seen corresponding path program 2 times [2020-09-24 15:08:27,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:27,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543610672] [2020-09-24 15:08:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:08:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 15:08:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 15:08:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 15:08:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:08:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-09-24 15:08:27,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543610672] [2020-09-24 15:08:27,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:27,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:08:27,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943884363] [2020-09-24 15:08:27,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:08:27,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:27,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:08:27,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:27,710 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand 10 states. [2020-09-24 15:08:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:28,053 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-09-24 15:08:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:08:28,053 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-09-24 15:08:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:28,055 INFO L225 Difference]: With dead ends: 160 [2020-09-24 15:08:28,055 INFO L226 Difference]: Without dead ends: 155 [2020-09-24 15:08:28,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:08:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-24 15:08:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-09-24 15:08:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-24 15:08:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2020-09-24 15:08:28,066 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 88 [2020-09-24 15:08:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:28,066 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2020-09-24 15:08:28,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:08:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2020-09-24 15:08:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 15:08:28,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:28,068 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:28,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 15:08:28,069 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:28,069 INFO L82 PathProgramCache]: Analyzing trace with hash 813915649, now seen corresponding path program 1 times [2020-09-24 15:08:28,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:28,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965979872] [2020-09-24 15:08:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:08:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 15:08:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 15:08:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 15:08:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:08:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 15:08:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-09-24 15:08:28,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965979872] [2020-09-24 15:08:28,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:28,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-24 15:08:28,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432911525] [2020-09-24 15:08:28,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:08:28,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:28,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:08:28,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:08:28,268 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand 13 states. [2020-09-24 15:08:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:28,694 INFO L93 Difference]: Finished difference Result 194 states and 221 transitions. [2020-09-24 15:08:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 15:08:28,695 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-09-24 15:08:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:28,696 INFO L225 Difference]: With dead ends: 194 [2020-09-24 15:08:28,697 INFO L226 Difference]: Without dead ends: 192 [2020-09-24 15:08:28,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-24 15:08:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-24 15:08:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2020-09-24 15:08:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-09-24 15:08:28,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 208 transitions. [2020-09-24 15:08:28,709 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 208 transitions. Word has length 97 [2020-09-24 15:08:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:28,709 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 208 transitions. [2020-09-24 15:08:28,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:08:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 208 transitions. [2020-09-24 15:08:28,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 15:08:28,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:28,711 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:28,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 15:08:28,711 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:28,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:28,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1992677655, now seen corresponding path program 2 times [2020-09-24 15:08:28,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:28,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81171420] [2020-09-24 15:08:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:08:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 15:08:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 15:08:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 15:08:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-24 15:08:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 15:08:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-09-24 15:08:28,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81171420] [2020-09-24 15:08:28,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:28,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-24 15:08:28,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27851560] [2020-09-24 15:08:28,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:08:28,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:28,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:08:28,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:08:28,885 INFO L87 Difference]: Start difference. First operand 183 states and 208 transitions. Second operand 13 states. [2020-09-24 15:08:29,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:29,262 INFO L93 Difference]: Finished difference Result 198 states and 224 transitions. [2020-09-24 15:08:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 15:08:29,263 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-09-24 15:08:29,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:29,264 INFO L225 Difference]: With dead ends: 198 [2020-09-24 15:08:29,265 INFO L226 Difference]: Without dead ends: 196 [2020-09-24 15:08:29,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-24 15:08:29,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-24 15:08:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2020-09-24 15:08:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-24 15:08:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2020-09-24 15:08:29,274 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 97 [2020-09-24 15:08:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:29,274 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2020-09-24 15:08:29,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:08:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2020-09-24 15:08:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-24 15:08:29,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:29,276 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 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, 1, 1, 1, 1] [2020-09-24 15:08:29,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 15:08:29,276 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash 762056004, now seen corresponding path program 3 times [2020-09-24 15:08:29,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:29,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308389473] [2020-09-24 15:08:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-24 15:08:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 15:08:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:08:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 15:08:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 15:08:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 15:08:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 15:08:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 15:08:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-24 15:08:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-09-24 15:08:29,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308389473] [2020-09-24 15:08:29,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:08:29,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:08:29,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726145110] [2020-09-24 15:08:29,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:29,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:29,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:29,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:29,550 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand 11 states. [2020-09-24 15:08:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:29,823 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2020-09-24 15:08:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:08:29,823 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2020-09-24 15:08:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:29,824 INFO L225 Difference]: With dead ends: 157 [2020-09-24 15:08:29,824 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 15:08:29,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:08:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 15:08:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 15:08:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 15:08:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 15:08:29,826 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2020-09-24 15:08:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:29,826 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 15:08:29,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 15:08:29,827 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 15:08:29,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 15:08:29,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 15:08:30,337 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 15:08:30,338 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:08:30,338 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:08:30,338 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 15:08:30,338 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 15:08:30,338 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 15:08:30,338 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 15:08:30,338 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 15:08:30,338 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 15:08:30,340 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 15:08:30,340 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 15:08:30,340 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-09-24 15:08:30,340 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-24 15:08:30,340 INFO L268 CegarLoopResult]: For program point L60-1(line 60) no Hoare annotation was computed. [2020-09-24 15:08:30,340 INFO L268 CegarLoopResult]: For program point L27-1(lines 27 29) no Hoare annotation was computed. [2020-09-24 15:08:30,340 INFO L268 CegarLoopResult]: For program point L27-2(line 27) no Hoare annotation was computed. [2020-09-24 15:08:30,340 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 66) no Hoare annotation was computed. [2020-09-24 15:08:30,341 INFO L268 CegarLoopResult]: For program point L27-3(line 27) no Hoare annotation was computed. [2020-09-24 15:08:30,341 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-09-24 15:08:30,341 INFO L268 CegarLoopResult]: For program point L44-1(lines 44 53) no Hoare annotation was computed. [2020-09-24 15:08:30,341 INFO L268 CegarLoopResult]: For program point L44-2(line 44) no Hoare annotation was computed. [2020-09-24 15:08:30,341 INFO L268 CegarLoopResult]: For program point L44-4(line 44) no Hoare annotation was computed. [2020-09-24 15:08:30,341 INFO L268 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-09-24 15:08:30,342 INFO L268 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-09-24 15:08:30,342 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-24 15:08:30,342 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-24 15:08:30,342 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-24 15:08:30,342 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-09-24 15:08:30,343 INFO L264 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-09-24 15:08:30,344 INFO L264 CegarLoopResult]: At program point L37-2(lines 37 61) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-09-24 15:08:30,344 INFO L264 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-09-24 15:08:30,344 INFO L264 CegarLoopResult]: At program point L62(line 62) the Hoare annotation is: (and (<= 0 main_~tagbuf_len~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-09-24 15:08:30,345 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 33) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-09-24 15:08:30,345 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 33) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-09-24 15:08:30,345 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-09-24 15:08:30,345 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 66) no Hoare annotation was computed. [2020-09-24 15:08:30,345 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-09-24 15:08:30,346 INFO L271 CegarLoopResult]: At program point L63(lines 14 66) the Hoare annotation is: true [2020-09-24 15:08:30,346 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-09-24 15:08:30,346 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 66) the Hoare annotation is: true [2020-09-24 15:08:30,346 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-09-24 15:08:30,346 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-09-24 15:08:30,346 INFO L268 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-09-24 15:08:30,346 INFO L268 CegarLoopResult]: For program point L55-1(lines 55 57) no Hoare annotation was computed. [2020-09-24 15:08:30,347 INFO L268 CegarLoopResult]: For program point L55-2(line 55) no Hoare annotation was computed. [2020-09-24 15:08:30,347 INFO L268 CegarLoopResult]: For program point L55-3(line 55) no Hoare annotation was computed. [2020-09-24 15:08:30,347 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-09-24 15:08:30,347 INFO L268 CegarLoopResult]: For program point L47-1(line 47) no Hoare annotation was computed. [2020-09-24 15:08:30,347 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-09-24 15:08:30,347 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-09-24 15:08:30,347 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-09-24 15:08:30,348 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-09-24 15:08:30,348 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-09-24 15:08:30,348 INFO L268 CegarLoopResult]: For program point L48(lines 48 52) no Hoare annotation was computed. [2020-09-24 15:08:30,348 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-24 15:08:30,348 INFO L268 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-09-24 15:08:30,348 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-09-24 15:08:30,348 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 15:08:30,350 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-09-24 15:08:30,350 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-09-24 15:08:30,350 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 15:08:30,350 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-09-24 15:08:30,350 INFO L268 CegarLoopResult]: For program point L17-2(line 17) no Hoare annotation was computed. [2020-09-24 15:08:30,350 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-09-24 15:08:30,350 INFO L268 CegarLoopResult]: For program point L59(line 59) no Hoare annotation was computed. [2020-09-24 15:08:30,351 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 15:08:30,351 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-09-24 15:08:30,351 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-09-24 15:08:30,351 INFO L268 CegarLoopResult]: For program point L43-1(lines 43 57) no Hoare annotation was computed. [2020-09-24 15:08:30,352 INFO L268 CegarLoopResult]: For program point L43-2(line 43) no Hoare annotation was computed. [2020-09-24 15:08:30,352 INFO L268 CegarLoopResult]: For program point L43-3(line 43) no Hoare annotation was computed. [2020-09-24 15:08:30,352 INFO L264 CegarLoopResult]: At program point L43-4(lines 43 57) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-09-24 15:08:30,352 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-09-24 15:08:30,353 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 15:08:30,353 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 15:08:30,353 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 15:08:30,353 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 15:08:30,353 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 15:08:30,353 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 15:08:30,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:08:30 BoogieIcfgContainer [2020-09-24 15:08:30,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:08:30,385 INFO L168 Benchmark]: Toolchain (without parser) took 11877.91 ms. Allocated memory was 136.8 MB in the beginning and 357.0 MB in the end (delta: 220.2 MB). Free memory was 100.2 MB in the beginning and 199.1 MB in the end (delta: -98.9 MB). Peak memory consumption was 121.3 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:30,386 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 15:08:30,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.55 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 89.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:30,387 INFO L168 Benchmark]: Boogie Preprocessor took 121.74 ms. Allocated memory was 136.8 MB in the beginning and 198.7 MB in the end (delta: 61.9 MB). Free memory was 89.7 MB in the beginning and 176.5 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:30,390 INFO L168 Benchmark]: RCFGBuilder took 439.04 ms. Allocated memory is still 198.7 MB. Free memory was 176.5 MB in the beginning and 158.0 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:30,395 INFO L168 Benchmark]: TraceAbstraction took 10992.62 ms. Allocated memory was 198.7 MB in the beginning and 357.0 MB in the end (delta: 158.3 MB). Free memory was 157.3 MB in the beginning and 199.1 MB in the end (delta: -41.8 MB). Peak memory consumption was 116.5 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:30,398 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.55 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 89.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.74 ms. Allocated memory was 136.8 MB in the beginning and 198.7 MB in the end (delta: 61.9 MB). Free memory was 89.7 MB in the beginning and 176.5 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 439.04 ms. Allocated memory is still 198.7 MB. Free memory was 176.5 MB in the beginning and 158.0 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10992.62 ms. Allocated memory was 198.7 MB in the beginning and 357.0 MB in the end (delta: 158.3 MB). Free memory was 157.3 MB in the beginning and 199.1 MB in the end (delta: -41.8 MB). Peak memory consumption was 116.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 0 <= t && t <= tagbuf_len - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 1 <= t - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.3s, OverallIterations: 25, TraceHistogramMax: 10, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2053 SDtfs, 882 SDslu, 10886 SDs, 0 SdLazy, 3945 SolverSat, 357 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 673 GetRequests, 331 SyntacticMatches, 33 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=253occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 193 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 94 PreInvPairs, 146 NumberOfFragments, 140 HoareAnnotationTreeSize, 94 FomulaSimplifications, 3800 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 24 FomulaSimplificationsInter, 314 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 1561 NumberOfCodeBlocks, 1561 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1536 ConstructedInterpolants, 0 QuantifiedInterpolants, 260472 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 20 PerfectInterpolantSequences, 1424/1449 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...