/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:47:23,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:47:23,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:47:23,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:47:23,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:47:23,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:47:23,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:47:23,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:47:23,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:47:23,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:47:23,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:47:23,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:47:23,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:47:23,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:47:23,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:47:23,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:47:23,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:47:23,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:47:23,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:47:23,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:47:23,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:47:23,419 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:47:23,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:47:23,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:47:23,421 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:47:23,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:47:23,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:47:23,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:47:23,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:47:23,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:47:23,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:47:23,423 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:47:23,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:47:23,423 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:47:23,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:47:23,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:47:23,424 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:47:23,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:47:23,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:47:23,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:47:23,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:47:23,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:47:23,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:47:23,425 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:47:23,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:47:23,743 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:47:23,746 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:47:23,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:47:23,749 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:47:23,750 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-08-22 19:47:23,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/377117c55/b35578cb3bae42b1bb244d4971a1a86d/FLAG328c991fc [2020-08-22 19:47:24,340 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:47:24,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-08-22 19:47:24,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/377117c55/b35578cb3bae42b1bb244d4971a1a86d/FLAG328c991fc [2020-08-22 19:47:24,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/377117c55/b35578cb3bae42b1bb244d4971a1a86d [2020-08-22 19:47:24,709 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:47:24,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:47:24,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:47:24,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:47:24,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:47:24,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:47:24" (1/1) ... [2020-08-22 19:47:24,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d786d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:24, skipping insertion in model container [2020-08-22 19:47:24,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:47:24" (1/1) ... [2020-08-22 19:47:24,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:47:24,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:47:24,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:47:24,994 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:47:25,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:47:25,033 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:47:25,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:25 WrapperNode [2020-08-22 19:47:25,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:47:25,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:47:25,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:47:25,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:47:25,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:25" (1/1) ... [2020-08-22 19:47:25,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:25" (1/1) ... [2020-08-22 19:47:25,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:25" (1/1) ... [2020-08-22 19:47:25,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:25" (1/1) ... [2020-08-22 19:47:25,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:25" (1/1) ... [2020-08-22 19:47:25,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:25" (1/1) ... [2020-08-22 19:47:25,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:25" (1/1) ... [2020-08-22 19:47:25,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:47:25,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:47:25,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:47:25,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:47:25,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:47:25,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:47:25,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:47:25,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:47:25,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:47:25,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:47:25,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:47:25,249 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:47:25,249 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:47:25,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:47:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:47:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:47:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:47:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:47:25,536 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:47:25,536 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 19:47:25,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:47:25 BoogieIcfgContainer [2020-08-22 19:47:25,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:47:25,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:47:25,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:47:25,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:47:25,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:47:24" (1/3) ... [2020-08-22 19:47:25,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:47:25, skipping insertion in model container [2020-08-22 19:47:25,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:25" (2/3) ... [2020-08-22 19:47:25,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:47:25, skipping insertion in model container [2020-08-22 19:47:25,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:47:25" (3/3) ... [2020-08-22 19:47:25,555 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-08-22 19:47:25,568 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:47:25,586 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:47:25,614 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:47:25,663 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:47:25,664 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:47:25,664 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:47:25,664 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:47:25,665 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:47:25,665 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:47:25,665 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:47:25,665 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:47:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-08-22 19:47:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 19:47:25,694 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:25,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:25,695 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:25,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:25,701 INFO L82 PathProgramCache]: Analyzing trace with hash -537390573, now seen corresponding path program 1 times [2020-08-22 19:47:25,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:25,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079308682] [2020-08-22 19:47:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:25,765 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:25,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:25,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079308682] [2020-08-22 19:47:25,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:25,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:47:25,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045986281] [2020-08-22 19:47:25,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:47:25,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:47:25,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:47:25,877 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 2 states. [2020-08-22 19:47:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:25,925 INFO L93 Difference]: Finished difference Result 134 states and 203 transitions. [2020-08-22 19:47:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:47:25,927 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-08-22 19:47:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:25,940 INFO L225 Difference]: With dead ends: 134 [2020-08-22 19:47:25,940 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 19:47:25,947 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 [2020-08-22 19:47:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 19:47:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-22 19:47:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 19:47:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-08-22 19:47:26,016 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 19 [2020-08-22 19:47:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:26,017 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-08-22 19:47:26,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:47:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-08-22 19:47:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 19:47:26,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:26,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:26,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:47:26,020 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:26,021 INFO L82 PathProgramCache]: Analyzing trace with hash 471335344, now seen corresponding path program 1 times [2020-08-22 19:47:26,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:26,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58069714] [2020-08-22 19:47:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:26,024 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:26,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:26,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58069714] [2020-08-22 19:47:26,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:26,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:47:26,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216335279] [2020-08-22 19:47:26,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:47:26,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:26,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:47:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:47:26,158 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 5 states. [2020-08-22 19:47:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:26,337 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2020-08-22 19:47:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:47:26,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-22 19:47:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:26,340 INFO L225 Difference]: With dead ends: 91 [2020-08-22 19:47:26,341 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 19:47:26,343 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 [2020-08-22 19:47:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 19:47:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-08-22 19:47:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 19:47:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2020-08-22 19:47:26,368 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 20 [2020-08-22 19:47:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:26,369 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2020-08-22 19:47:26,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:47:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2020-08-22 19:47:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 19:47:26,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:26,370 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] [2020-08-22 19:47:26,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:47:26,371 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:26,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1383579147, now seen corresponding path program 1 times [2020-08-22 19:47:26,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:26,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371706552] [2020-08-22 19:47:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:26,375 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:26,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:26,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 19:47:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:26,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371706552] [2020-08-22 19:47:26,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:26,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:47:26,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523203420] [2020-08-22 19:47:26,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:47:26,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:26,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:47:26,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:47:26,495 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand 5 states. [2020-08-22 19:47:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:26,617 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2020-08-22 19:47:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:47:26,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-08-22 19:47:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:26,623 INFO L225 Difference]: With dead ends: 88 [2020-08-22 19:47:26,624 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 19:47:26,625 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 [2020-08-22 19:47:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 19:47:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-22 19:47:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 19:47:26,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-08-22 19:47:26,654 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 25 [2020-08-22 19:47:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:26,657 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-08-22 19:47:26,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:47:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-08-22 19:47:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 19:47:26,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:26,660 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] [2020-08-22 19:47:26,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:47:26,660 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:26,661 INFO L82 PathProgramCache]: Analyzing trace with hash 344115466, now seen corresponding path program 1 times [2020-08-22 19:47:26,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:26,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995071322] [2020-08-22 19:47:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:26,665 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:26,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:26,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:26,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995071322] [2020-08-22 19:47:26,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:26,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:47:26,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530307168] [2020-08-22 19:47:26,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:47:26,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:47:26,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:47:26,818 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 7 states. [2020-08-22 19:47:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:27,031 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-08-22 19:47:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:47:27,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-08-22 19:47:27,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:27,037 INFO L225 Difference]: With dead ends: 90 [2020-08-22 19:47:27,037 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 19:47:27,038 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 [2020-08-22 19:47:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 19:47:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-08-22 19:47:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 19:47:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-08-22 19:47:27,063 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 28 [2020-08-22 19:47:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:27,063 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-08-22 19:47:27,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:47:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-08-22 19:47:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 19:47:27,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:27,066 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] [2020-08-22 19:47:27,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:47:27,066 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:27,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1469174755, now seen corresponding path program 1 times [2020-08-22 19:47:27,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:27,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712161638] [2020-08-22 19:47:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:27,125 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:27,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712161638] [2020-08-22 19:47:27,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:27,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:47:27,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669793438] [2020-08-22 19:47:27,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:47:27,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:27,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:47:27,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:47:27,258 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 7 states. [2020-08-22 19:47:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:27,466 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-08-22 19:47:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:47:27,467 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-08-22 19:47:27,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:27,468 INFO L225 Difference]: With dead ends: 94 [2020-08-22 19:47:27,468 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 19:47:27,469 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 [2020-08-22 19:47:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 19:47:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-08-22 19:47:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 19:47:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-08-22 19:47:27,481 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 38 [2020-08-22 19:47:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:27,482 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-08-22 19:47:27,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:47:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-08-22 19:47:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 19:47:27,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:27,487 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] [2020-08-22 19:47:27,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:47:27,488 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:27,488 INFO L82 PathProgramCache]: Analyzing trace with hash 859677550, now seen corresponding path program 1 times [2020-08-22 19:47:27,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:27,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545929495] [2020-08-22 19:47:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:27,498 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:27,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545929495] [2020-08-22 19:47:27,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:27,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:47:27,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829288953] [2020-08-22 19:47:27,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:47:27,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:27,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:47:27,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:47:27,563 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 7 states. [2020-08-22 19:47:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:27,705 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-08-22 19:47:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:47:27,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-22 19:47:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:27,708 INFO L225 Difference]: With dead ends: 91 [2020-08-22 19:47:27,708 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 19:47:27,709 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 [2020-08-22 19:47:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 19:47:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-08-22 19:47:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 19:47:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-08-22 19:47:27,722 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 41 [2020-08-22 19:47:27,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:27,723 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-08-22 19:47:27,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:47:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-08-22 19:47:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 19:47:27,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:27,725 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] [2020-08-22 19:47:27,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:47:27,726 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash -943144682, now seen corresponding path program 1 times [2020-08-22 19:47:27,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:27,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634953310] [2020-08-22 19:47:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:27,728 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:27,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634953310] [2020-08-22 19:47:27,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:27,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:47:27,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730143496] [2020-08-22 19:47:27,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:47:27,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:27,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:47:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:47:27,807 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 7 states. [2020-08-22 19:47:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:27,973 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2020-08-22 19:47:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:47:27,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-08-22 19:47:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:27,976 INFO L225 Difference]: With dead ends: 120 [2020-08-22 19:47:27,976 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 19:47:27,977 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 [2020-08-22 19:47:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 19:47:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2020-08-22 19:47:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 19:47:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-08-22 19:47:27,994 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 44 [2020-08-22 19:47:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:27,995 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-08-22 19:47:27,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:47:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-08-22 19:47:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 19:47:27,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:27,997 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] [2020-08-22 19:47:27,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:47:27,998 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1177695863, now seen corresponding path program 2 times [2020-08-22 19:47:27,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:27,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073352266] [2020-08-22 19:47:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:28,005 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:47:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:28,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073352266] [2020-08-22 19:47:28,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:28,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:47:28,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123080753] [2020-08-22 19:47:28,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:47:28,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:28,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:47:28,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:47:28,128 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 8 states. [2020-08-22 19:47:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:28,301 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-08-22 19:47:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 19:47:28,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-08-22 19:47:28,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:28,306 INFO L225 Difference]: With dead ends: 115 [2020-08-22 19:47:28,307 INFO L226 Difference]: Without dead ends: 113 [2020-08-22 19:47:28,307 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 [2020-08-22 19:47:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-08-22 19:47:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-08-22 19:47:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 19:47:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2020-08-22 19:47:28,328 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 46 [2020-08-22 19:47:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:28,329 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2020-08-22 19:47:28,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:47:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2020-08-22 19:47:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 19:47:28,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:28,331 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] [2020-08-22 19:47:28,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:47:28,331 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1826770767, now seen corresponding path program 1 times [2020-08-22 19:47:28,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:28,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302384953] [2020-08-22 19:47:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:28,334 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 19:47:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:28,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302384953] [2020-08-22 19:47:28,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:28,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:47:28,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411599614] [2020-08-22 19:47:28,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:47:28,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:28,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:47:28,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:47:28,430 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand 8 states. [2020-08-22 19:47:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:28,653 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2020-08-22 19:47:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 19:47:28,653 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-08-22 19:47:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:28,655 INFO L225 Difference]: With dead ends: 128 [2020-08-22 19:47:28,655 INFO L226 Difference]: Without dead ends: 123 [2020-08-22 19:47:28,656 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 [2020-08-22 19:47:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-08-22 19:47:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-08-22 19:47:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-22 19:47:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2020-08-22 19:47:28,669 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 49 [2020-08-22 19:47:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:28,670 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2020-08-22 19:47:28,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:47:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2020-08-22 19:47:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 19:47:28,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:28,672 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] [2020-08-22 19:47:28,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:47:28,672 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1519048418, now seen corresponding path program 1 times [2020-08-22 19:47:28,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:28,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749477504] [2020-08-22 19:47:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:28,675 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 19:47:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 19:47:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:28,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749477504] [2020-08-22 19:47:28,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:28,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:47:28,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338847127] [2020-08-22 19:47:28,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:47:28,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:28,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:47:28,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:47:28,765 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand 9 states. [2020-08-22 19:47:28,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:28,964 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2020-08-22 19:47:28,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:47:28,964 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-22 19:47:28,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:28,966 INFO L225 Difference]: With dead ends: 135 [2020-08-22 19:47:28,966 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 19:47:28,967 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 [2020-08-22 19:47:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 19:47:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2020-08-22 19:47:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 19:47:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2020-08-22 19:47:28,988 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 58 [2020-08-22 19:47:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:28,988 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2020-08-22 19:47:28,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:47:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2020-08-22 19:47:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 19:47:28,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:28,990 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] [2020-08-22 19:47:28,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:47:28,990 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:28,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1733407875, now seen corresponding path program 1 times [2020-08-22 19:47:28,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:28,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361364386] [2020-08-22 19:47:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:28,998 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:47:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:47:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:29,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361364386] [2020-08-22 19:47:29,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:29,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:47:29,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273620590] [2020-08-22 19:47:29,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:47:29,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:29,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:47:29,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:47:29,090 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand 9 states. [2020-08-22 19:47:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:29,317 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2020-08-22 19:47:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:47:29,318 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-08-22 19:47:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:29,321 INFO L225 Difference]: With dead ends: 158 [2020-08-22 19:47:29,321 INFO L226 Difference]: Without dead ends: 156 [2020-08-22 19:47:29,322 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 [2020-08-22 19:47:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-22 19:47:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2020-08-22 19:47:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-22 19:47:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2020-08-22 19:47:29,337 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 62 [2020-08-22 19:47:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:29,337 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2020-08-22 19:47:29,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:47:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2020-08-22 19:47:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 19:47:29,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:29,339 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] [2020-08-22 19:47:29,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:47:29,340 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:29,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1967257859, now seen corresponding path program 1 times [2020-08-22 19:47:29,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:29,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238584875] [2020-08-22 19:47:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:29,342 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 19:47:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 19:47:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 19:47:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:29,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238584875] [2020-08-22 19:47:29,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:29,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:47:29,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936586592] [2020-08-22 19:47:29,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:47:29,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:47:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:47:29,465 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand 9 states. [2020-08-22 19:47:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:29,709 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-08-22 19:47:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:47:29,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-08-22 19:47:29,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:29,711 INFO L225 Difference]: With dead ends: 158 [2020-08-22 19:47:29,712 INFO L226 Difference]: Without dead ends: 156 [2020-08-22 19:47:29,713 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 [2020-08-22 19:47:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-22 19:47:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2020-08-22 19:47:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-22 19:47:29,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 174 transitions. [2020-08-22 19:47:29,730 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 174 transitions. Word has length 63 [2020-08-22 19:47:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:29,730 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 174 transitions. [2020-08-22 19:47:29,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:47:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 174 transitions. [2020-08-22 19:47:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 19:47:29,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:29,732 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] [2020-08-22 19:47:29,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:47:29,733 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:29,733 INFO L82 PathProgramCache]: Analyzing trace with hash -822659134, now seen corresponding path program 1 times [2020-08-22 19:47:29,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:29,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423037093] [2020-08-22 19:47:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:29,735 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 19:47:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 19:47:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:29,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423037093] [2020-08-22 19:47:29,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:29,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:47:29,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787555741] [2020-08-22 19:47:29,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:47:29,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:29,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:47:29,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:47:29,830 INFO L87 Difference]: Start difference. First operand 152 states and 174 transitions. Second operand 9 states. [2020-08-22 19:47:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:30,090 INFO L93 Difference]: Finished difference Result 187 states and 216 transitions. [2020-08-22 19:47:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:47:30,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-22 19:47:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:30,092 INFO L225 Difference]: With dead ends: 187 [2020-08-22 19:47:30,093 INFO L226 Difference]: Without dead ends: 185 [2020-08-22 19:47:30,094 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 [2020-08-22 19:47:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-08-22 19:47:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2020-08-22 19:47:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-22 19:47:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 205 transitions. [2020-08-22 19:47:30,111 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 205 transitions. Word has length 65 [2020-08-22 19:47:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:30,111 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 205 transitions. [2020-08-22 19:47:30,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:47:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 205 transitions. [2020-08-22 19:47:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 19:47:30,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:30,113 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] [2020-08-22 19:47:30,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:47:30,113 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:30,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1510377470, now seen corresponding path program 1 times [2020-08-22 19:47:30,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:30,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920046697] [2020-08-22 19:47:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:30,119 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:47:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:47:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:47:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:30,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920046697] [2020-08-22 19:47:30,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:30,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:47:30,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100648015] [2020-08-22 19:47:30,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:47:30,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:47:30,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:47:30,241 INFO L87 Difference]: Start difference. First operand 177 states and 205 transitions. Second operand 9 states. [2020-08-22 19:47:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:30,529 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2020-08-22 19:47:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:47:30,529 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-08-22 19:47:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:30,531 INFO L225 Difference]: With dead ends: 192 [2020-08-22 19:47:30,532 INFO L226 Difference]: Without dead ends: 187 [2020-08-22 19:47:30,533 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 [2020-08-22 19:47:30,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-22 19:47:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2020-08-22 19:47:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-08-22 19:47:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 208 transitions. [2020-08-22 19:47:30,550 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 208 transitions. Word has length 67 [2020-08-22 19:47:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:30,550 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 208 transitions. [2020-08-22 19:47:30,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:47:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 208 transitions. [2020-08-22 19:47:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 19:47:30,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:30,552 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] [2020-08-22 19:47:30,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:47:30,552 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash 869213219, now seen corresponding path program 2 times [2020-08-22 19:47:30,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:30,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496253911] [2020-08-22 19:47:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:30,555 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 19:47:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 19:47:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 19:47:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:30,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496253911] [2020-08-22 19:47:30,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:30,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:47:30,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074146464] [2020-08-22 19:47:30,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:47:30,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:30,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:47:30,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:47:30,672 INFO L87 Difference]: Start difference. First operand 181 states and 208 transitions. Second operand 9 states. [2020-08-22 19:47:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:30,906 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2020-08-22 19:47:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:47:30,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-08-22 19:47:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:30,909 INFO L225 Difference]: With dead ends: 193 [2020-08-22 19:47:30,909 INFO L226 Difference]: Without dead ends: 188 [2020-08-22 19:47:30,910 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 [2020-08-22 19:47:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-22 19:47:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2020-08-22 19:47:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 19:47:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2020-08-22 19:47:30,929 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 70 [2020-08-22 19:47:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:30,929 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2020-08-22 19:47:30,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:47:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2020-08-22 19:47:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 19:47:30,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:30,931 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] [2020-08-22 19:47:30,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:47:30,931 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:30,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:30,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1269119089, now seen corresponding path program 1 times [2020-08-22 19:47:30,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:30,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988158469] [2020-08-22 19:47:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:30,937 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:47:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:47:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:47:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 19:47:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:31,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988158469] [2020-08-22 19:47:31,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:31,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:47:31,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786122900] [2020-08-22 19:47:31,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:47:31,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:31,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:47:31,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:47:31,083 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand 11 states. [2020-08-22 19:47:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:31,342 INFO L93 Difference]: Finished difference Result 202 states and 228 transitions. [2020-08-22 19:47:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 19:47:31,342 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-08-22 19:47:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:31,344 INFO L225 Difference]: With dead ends: 202 [2020-08-22 19:47:31,344 INFO L226 Difference]: Without dead ends: 200 [2020-08-22 19:47:31,345 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 [2020-08-22 19:47:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-22 19:47:31,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 193. [2020-08-22 19:47:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-08-22 19:47:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2020-08-22 19:47:31,361 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 76 [2020-08-22 19:47:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:31,361 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2020-08-22 19:47:31,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:47:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2020-08-22 19:47:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 19:47:31,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:31,363 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] [2020-08-22 19:47:31,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 19:47:31,363 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:31,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:31,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1147260786, now seen corresponding path program 1 times [2020-08-22 19:47:31,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:31,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729377145] [2020-08-22 19:47:31,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:31,366 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 19:47:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 19:47:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 19:47:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 19:47:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:31,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729377145] [2020-08-22 19:47:31,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:31,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:47:31,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780302008] [2020-08-22 19:47:31,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:47:31,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:31,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:47:31,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:47:31,476 INFO L87 Difference]: Start difference. First operand 193 states and 218 transitions. Second operand 11 states. [2020-08-22 19:47:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:31,821 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2020-08-22 19:47:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:47:31,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-08-22 19:47:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:31,824 INFO L225 Difference]: With dead ends: 234 [2020-08-22 19:47:31,824 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 19:47:31,825 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 [2020-08-22 19:47:31,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 19:47:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 223. [2020-08-22 19:47:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-08-22 19:47:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 255 transitions. [2020-08-22 19:47:31,845 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 255 transitions. Word has length 79 [2020-08-22 19:47:31,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:31,845 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 255 transitions. [2020-08-22 19:47:31,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:47:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 255 transitions. [2020-08-22 19:47:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 19:47:31,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:31,847 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] [2020-08-22 19:47:31,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 19:47:31,848 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:31,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:31,848 INFO L82 PathProgramCache]: Analyzing trace with hash 341113206, now seen corresponding path program 2 times [2020-08-22 19:47:31,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:31,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292493963] [2020-08-22 19:47:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:31,850 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 19:47:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 19:47:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 19:47:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 19:47:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:31,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292493963] [2020-08-22 19:47:31,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:31,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:47:31,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371204367] [2020-08-22 19:47:31,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:47:31,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:31,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:47:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:47:31,995 INFO L87 Difference]: Start difference. First operand 223 states and 255 transitions. Second operand 11 states. [2020-08-22 19:47:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:32,304 INFO L93 Difference]: Finished difference Result 264 states and 305 transitions. [2020-08-22 19:47:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:47:32,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-08-22 19:47:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:32,311 INFO L225 Difference]: With dead ends: 264 [2020-08-22 19:47:32,311 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 19:47:32,313 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 [2020-08-22 19:47:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 19:47:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 223. [2020-08-22 19:47:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-08-22 19:47:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 255 transitions. [2020-08-22 19:47:32,340 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 255 transitions. Word has length 79 [2020-08-22 19:47:32,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:32,341 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 255 transitions. [2020-08-22 19:47:32,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:47:32,341 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 255 transitions. [2020-08-22 19:47:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 19:47:32,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:32,342 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] [2020-08-22 19:47:32,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 19:47:32,343 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:32,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:32,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1759613834, now seen corresponding path program 1 times [2020-08-22 19:47:32,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:32,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969621528] [2020-08-22 19:47:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:32,357 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:32,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:32,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:32,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:32,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:47:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:32,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:47:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:32,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:47:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:32,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 19:47:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:32,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 19:47:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:32,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969621528] [2020-08-22 19:47:32,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:32,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:47:32,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748353263] [2020-08-22 19:47:32,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:47:32,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:32,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:47:32,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:47:32,539 INFO L87 Difference]: Start difference. First operand 223 states and 255 transitions. Second operand 10 states. [2020-08-22 19:47:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:32,861 INFO L93 Difference]: Finished difference Result 236 states and 268 transitions. [2020-08-22 19:47:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 19:47:32,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-08-22 19:47:32,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:32,866 INFO L225 Difference]: With dead ends: 236 [2020-08-22 19:47:32,866 INFO L226 Difference]: Without dead ends: 234 [2020-08-22 19:47:32,867 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 [2020-08-22 19:47:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-22 19:47:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2020-08-22 19:47:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-08-22 19:47:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 260 transitions. [2020-08-22 19:47:32,897 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 260 transitions. Word has length 81 [2020-08-22 19:47:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:32,898 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 260 transitions. [2020-08-22 19:47:32,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:47:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 260 transitions. [2020-08-22 19:47:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 19:47:32,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:32,907 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] [2020-08-22 19:47:32,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 19:47:32,908 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:32,908 INFO L82 PathProgramCache]: Analyzing trace with hash -343631243, now seen corresponding path program 1 times [2020-08-22 19:47:32,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:32,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279651643] [2020-08-22 19:47:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:32,923 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:47:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:47:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:47:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 19:47:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:33,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279651643] [2020-08-22 19:47:33,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:33,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:47:33,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923917182] [2020-08-22 19:47:33,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:47:33,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:33,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:47:33,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:47:33,074 INFO L87 Difference]: Start difference. First operand 228 states and 260 transitions. Second operand 11 states. [2020-08-22 19:47:33,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:33,399 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2020-08-22 19:47:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 19:47:33,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-22 19:47:33,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:33,403 INFO L225 Difference]: With dead ends: 263 [2020-08-22 19:47:33,403 INFO L226 Difference]: Without dead ends: 261 [2020-08-22 19:47:33,404 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 [2020-08-22 19:47:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-22 19:47:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 253. [2020-08-22 19:47:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-22 19:47:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 291 transitions. [2020-08-22 19:47:33,425 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 291 transitions. Word has length 83 [2020-08-22 19:47:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:33,425 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 291 transitions. [2020-08-22 19:47:33,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:47:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 291 transitions. [2020-08-22 19:47:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 19:47:33,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:33,428 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] [2020-08-22 19:47:33,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 19:47:33,430 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:33,431 INFO L82 PathProgramCache]: Analyzing trace with hash -857748777, now seen corresponding path program 3 times [2020-08-22 19:47:33,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:33,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742653669] [2020-08-22 19:47:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:33,434 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 19:47:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 19:47:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 19:47:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 19:47:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 19:47:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:33,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742653669] [2020-08-22 19:47:33,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:33,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:47:33,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487537628] [2020-08-22 19:47:33,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:47:33,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:47:33,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:47:33,583 INFO L87 Difference]: Start difference. First operand 253 states and 291 transitions. Second operand 10 states. [2020-08-22 19:47:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:33,947 INFO L93 Difference]: Finished difference Result 262 states and 299 transitions. [2020-08-22 19:47:33,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 19:47:33,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-08-22 19:47:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:33,950 INFO L225 Difference]: With dead ends: 262 [2020-08-22 19:47:33,950 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 19:47:33,953 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 [2020-08-22 19:47:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 19:47:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-08-22 19:47:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 19:47:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2020-08-22 19:47:33,969 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 84 [2020-08-22 19:47:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:33,970 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2020-08-22 19:47:33,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:47:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2020-08-22 19:47:33,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 19:47:33,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:33,975 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] [2020-08-22 19:47:33,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 19:47:33,976 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1405253968, now seen corresponding path program 2 times [2020-08-22 19:47:33,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:33,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239187843] [2020-08-22 19:47:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:33,987 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:47:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:47:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:47:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 19:47:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 19:47:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:34,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239187843] [2020-08-22 19:47:34,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:34,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:47:34,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6757180] [2020-08-22 19:47:34,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:47:34,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:47:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:47:34,215 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand 10 states. [2020-08-22 19:47:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:34,575 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-08-22 19:47:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 19:47:34,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-08-22 19:47:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:34,581 INFO L225 Difference]: With dead ends: 160 [2020-08-22 19:47:34,581 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 19:47:34,582 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 [2020-08-22 19:47:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 19:47:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-08-22 19:47:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-22 19:47:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2020-08-22 19:47:34,603 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 88 [2020-08-22 19:47:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:34,604 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2020-08-22 19:47:34,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:47:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2020-08-22 19:47:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 19:47:34,606 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:34,607 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] [2020-08-22 19:47:34,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 19:47:34,607 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:34,607 INFO L82 PathProgramCache]: Analyzing trace with hash 813915649, now seen corresponding path program 1 times [2020-08-22 19:47:34,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:34,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655607028] [2020-08-22 19:47:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:34,628 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:47:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:47:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:47:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 19:47:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 19:47:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 19:47:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:34,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655607028] [2020-08-22 19:47:34,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:34,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:47:34,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669905189] [2020-08-22 19:47:34,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:47:34,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:34,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:47:34,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:47:34,870 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand 13 states. [2020-08-22 19:47:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:35,307 INFO L93 Difference]: Finished difference Result 194 states and 221 transitions. [2020-08-22 19:47:35,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:47:35,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-08-22 19:47:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:35,312 INFO L225 Difference]: With dead ends: 194 [2020-08-22 19:47:35,312 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 19:47:35,313 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 [2020-08-22 19:47:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 19:47:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2020-08-22 19:47:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-08-22 19:47:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 208 transitions. [2020-08-22 19:47:35,331 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 208 transitions. Word has length 97 [2020-08-22 19:47:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:35,332 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 208 transitions. [2020-08-22 19:47:35,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:47:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 208 transitions. [2020-08-22 19:47:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 19:47:35,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:35,333 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] [2020-08-22 19:47:35,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 19:47:35,334 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:35,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1992677655, now seen corresponding path program 2 times [2020-08-22 19:47:35,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:35,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712205428] [2020-08-22 19:47:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:35,341 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:47:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:47:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:47:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 19:47:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 19:47:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 19:47:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:35,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712205428] [2020-08-22 19:47:35,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:35,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:47:35,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77092069] [2020-08-22 19:47:35,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:47:35,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:35,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:47:35,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:47:35,496 INFO L87 Difference]: Start difference. First operand 183 states and 208 transitions. Second operand 13 states. [2020-08-22 19:47:35,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:35,822 INFO L93 Difference]: Finished difference Result 198 states and 224 transitions. [2020-08-22 19:47:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:47:35,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-08-22 19:47:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:35,824 INFO L225 Difference]: With dead ends: 198 [2020-08-22 19:47:35,824 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 19:47:35,825 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 [2020-08-22 19:47:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 19:47:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2020-08-22 19:47:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 19:47:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2020-08-22 19:47:35,839 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 97 [2020-08-22 19:47:35,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:35,839 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2020-08-22 19:47:35,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:47:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2020-08-22 19:47:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-22 19:47:35,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:35,841 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] [2020-08-22 19:47:35,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 19:47:35,841 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:35,842 INFO L82 PathProgramCache]: Analyzing trace with hash 762056004, now seen corresponding path program 3 times [2020-08-22 19:47:35,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:35,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358099862] [2020-08-22 19:47:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:35,847 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 19:47:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:35,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 19:47:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:36,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:47:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:36,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 19:47:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:36,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:47:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:36,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 19:47:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:36,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 19:47:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:36,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 19:47:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:36,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 19:47:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:36,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358099862] [2020-08-22 19:47:36,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:36,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:47:36,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620960634] [2020-08-22 19:47:36,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:47:36,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:36,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:47:36,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:47:36,050 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand 11 states. [2020-08-22 19:47:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:36,362 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2020-08-22 19:47:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:47:36,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2020-08-22 19:47:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:36,363 INFO L225 Difference]: With dead ends: 157 [2020-08-22 19:47:36,363 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:47:36,364 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 [2020-08-22 19:47:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:47:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:47:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:47:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:47:36,365 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2020-08-22 19:47:36,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:36,365 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:47:36,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:47:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:47:36,365 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:47:36,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 19:47:36,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:47:38,001 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:47:38,001 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:47:38,001 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:47:38,001 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:47:38,001 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:47:38,002 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:47:38,002 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:38,002 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:38,002 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 19:47:38,003 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 19:47:38,003 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:38,003 INFO L264 CegarLoopResult]: At program point L60(line 60) the Hoare annotation is: (and (<= 1 |main_#t~post9|) (<= (+ |main_#t~post9| 1) main_~tagbuf_len~0) (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,004 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,004 INFO L264 CegarLoopResult]: At program point L60-1(line 60) the Hoare annotation is: (and (<= 2 main_~t~0) (<= 1 |main_#t~post9|) (<= main_~t~0 main_~tagbuf_len~0) (<= (+ |main_#t~post9| 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,004 INFO L264 CegarLoopResult]: At program point L27-1(lines 27 29) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,004 INFO L264 CegarLoopResult]: At program point L27-2(line 27) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,004 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 66) the Hoare annotation is: true [2020-08-22 19:47:38,004 INFO L264 CegarLoopResult]: At program point L27-3(line 27) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,004 INFO L264 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,005 INFO L264 CegarLoopResult]: At program point L44-1(lines 44 53) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,005 INFO L264 CegarLoopResult]: At program point L44-2(line 44) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,005 INFO L264 CegarLoopResult]: At program point L44-4(line 44) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,005 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= (+ |main_#t~post4| 1) main_~tagbuf_len~0) (<= 0 main_~t~0) (<= 0 |main_#t~post4|) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,006 INFO L264 CegarLoopResult]: At program point L36-1(line 36) the Hoare annotation is: (and (<= (+ |main_#t~post4| 1) main_~tagbuf_len~0) (<= 0 |main_#t~post4|) (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-08-22 19:47:38,006 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,006 INFO L264 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,006 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-22 19:47:38,006 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)) [2020-08-22 19:47:38,006 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)) [2020-08-22 19:47:38,006 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)) [2020-08-22 19:47:38,007 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)) [2020-08-22 19:47:38,007 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)) [2020-08-22 19:47:38,007 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)) [2020-08-22 19:47:38,007 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)) [2020-08-22 19:47:38,007 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,007 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 66) the Hoare annotation is: true [2020-08-22 19:47:38,007 INFO L264 CegarLoopResult]: At program point L38(lines 38 42) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-08-22 19:47:38,008 INFO L271 CegarLoopResult]: At program point L63(lines 14 66) the Hoare annotation is: true [2020-08-22 19:47:38,008 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)) [2020-08-22 19:47:38,008 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 66) the Hoare annotation is: true [2020-08-22 19:47:38,008 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)) [2020-08-22 19:47:38,008 INFO L264 CegarLoopResult]: At program point L55(line 55) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,008 INFO L264 CegarLoopResult]: At program point L22(lines 22 26) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-22 19:47:38,008 INFO L264 CegarLoopResult]: At program point L55-1(lines 55 57) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,009 INFO L264 CegarLoopResult]: At program point L55-2(line 55) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,009 INFO L264 CegarLoopResult]: At program point L55-3(line 55) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,009 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= 1 |main_#t~post7|) (<= (+ |main_#t~post7| 1) main_~tagbuf_len~0) (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,009 INFO L264 CegarLoopResult]: At program point L47-1(line 47) the Hoare annotation is: (and (<= 2 main_~t~0) (<= 1 |main_#t~post7|) (<= main_~t~0 main_~tagbuf_len~0) (<= (+ |main_#t~post7| 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,009 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)) [2020-08-22 19:47:38,009 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-08-22 19:47:38,009 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,009 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)) [2020-08-22 19:47:38,010 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-08-22 19:47:38,010 INFO L264 CegarLoopResult]: At program point L48(lines 48 52) the Hoare annotation is: (and (<= 2 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-22 19:47:38,010 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (and (<= 0 |main_#t~post3|) (<= 0 main_~t~0) (<= (+ |main_#t~post3| 1) main_~tagbuf_len~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,010 INFO L264 CegarLoopResult]: At program point L32-1(line 32) the Hoare annotation is: (and (<= 0 |main_#t~post3|) (<= main_~t~0 main_~tagbuf_len~0) (<= (+ |main_#t~post3| 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-08-22 19:47:38,010 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)) [2020-08-22 19:47:38,010 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 19:47:38,011 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-08-22 19:47:38,011 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)) [2020-08-22 19:47:38,012 INFO L271 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: true [2020-08-22 19:47:38,012 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-08-22 19:47:38,012 INFO L271 CegarLoopResult]: At program point L17-2(line 17) the Hoare annotation is: true [2020-08-22 19:47:38,012 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)) [2020-08-22 19:47:38,012 INFO L264 CegarLoopResult]: At program point L59(line 59) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,012 INFO L271 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-08-22 19:47:38,012 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (<= 1 main_~tagbuf_len~0) [2020-08-22 19:47:38,012 INFO L264 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,013 INFO L264 CegarLoopResult]: At program point L43-1(lines 43 57) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,013 INFO L264 CegarLoopResult]: At program point L43-2(line 43) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,013 INFO L264 CegarLoopResult]: At program point L43-3(line 43) the Hoare annotation is: (and (<= 1 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,013 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)) [2020-08-22 19:47:38,014 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-22 19:47:38,014 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 19:47:38,014 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:47:38,014 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:47:38,014 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:47:38,014 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:47:38,014 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:47:38,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:47:38 BoogieIcfgContainer [2020-08-22 19:47:38,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:47:38,046 INFO L168 Benchmark]: Toolchain (without parser) took 13335.19 ms. Allocated memory was 137.4 MB in the beginning and 376.4 MB in the end (delta: 239.1 MB). Free memory was 101.3 MB in the beginning and 277.3 MB in the end (delta: -176.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:38,047 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 19:47:38,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.88 ms. Allocated memory is still 137.4 MB. Free memory was 101.1 MB in the beginning and 91.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:38,048 INFO L168 Benchmark]: Boogie Preprocessor took 134.92 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 91.1 MB in the beginning and 178.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:38,051 INFO L168 Benchmark]: RCFGBuilder took 374.08 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 159.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:38,056 INFO L168 Benchmark]: TraceAbstraction took 12498.44 ms. Allocated memory was 200.8 MB in the beginning and 376.4 MB in the end (delta: 175.6 MB). Free memory was 159.7 MB in the beginning and 277.3 MB in the end (delta: -117.5 MB). Peak memory consumption was 217.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:38,059 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 319.88 ms. Allocated memory is still 137.4 MB. Free memory was 101.1 MB in the beginning and 91.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.92 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 91.1 MB in the beginning and 178.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.08 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 159.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12498.44 ms. Allocated memory was 200.8 MB in the beginning and 376.4 MB in the end (delta: 175.6 MB). Free memory was 159.7 MB in the beginning and 277.3 MB in the end (delta: -117.5 MB). Peak memory consumption was 217.0 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 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.7s, OverallIterations: 25, TraceHistogramMax: 10, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2053 SDtfs, 888 SDslu, 10849 SDs, 0 SdLazy, 3941 SolverSat, 357 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 673 GetRequests, 331 SyntacticMatches, 33 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.7s 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: 0.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 193 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 74 LocationsWithAnnotation, 494 PreInvPairs, 814 NumberOfFragments, 537 HoareAnnotationTreeSize, 494 FomulaSimplifications, 529514 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 74 FomulaSimplificationsInter, 1846 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...