/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:01:24,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:01:24,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:01:24,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:01:24,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:01:24,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:01:24,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:01:24,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:01:24,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:01:24,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:01:24,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:01:24,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:01:24,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:01:24,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:01:24,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:01:24,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:01:24,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:01:24,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:01:24,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:01:24,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:01:24,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:01:24,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:01:24,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:01:24,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:01:24,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:01:24,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:01:24,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:01:24,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:01:24,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:01:24,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:01:24,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:01:24,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:01:24,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:01:24,439 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:01:24,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:01:24,439 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:01:24,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:01:24,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:01:24,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:01:24,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:01:24,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:01:24,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:01:24,441 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:01:24,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:01:24,441 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:01:24,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:01:24,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:01:24,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:01:24,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:01:24,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:01:24,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:01:24,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:01:24,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:01:24,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:01:24,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:01:24,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:01:24,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:01:24,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:01:24,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:01:24,733 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:01:24,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:01:24,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:01:24,752 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:01:24,752 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:01:24,753 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-07-17 12:01:24,838 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3f5482f4/796362b26f1443bf820d73e611eabdda/FLAG9507186f8 [2020-07-17 12:01:25,349 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:01:25,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2020-07-17 12:01:25,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3f5482f4/796362b26f1443bf820d73e611eabdda/FLAG9507186f8 [2020-07-17 12:01:25,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3f5482f4/796362b26f1443bf820d73e611eabdda [2020-07-17 12:01:25,676 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:01:25,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:01:25,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:01:25,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:01:25,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:01:25,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:25,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@403223eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25, skipping insertion in model container [2020-07-17 12:01:25,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:25,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:01:25,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:01:25,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:01:25,908 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:01:25,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:01:25,984 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:01:25,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25 WrapperNode [2020-07-17 12:01:25,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:01:25,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:01:25,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:01:25,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:01:25,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:25,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:26,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:26,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:26,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:26,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:26,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25" (1/1) ... [2020-07-17 12:01:26,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:01:26,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:01:26,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:01:26,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:01:26,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25" (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 [2020-07-17 12:01:26,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:01:26,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:01:26,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:01:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:01:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:01:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:01:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:01:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:01:26,494 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:01:26,495 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 12:01:26,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:01:26 BoogieIcfgContainer [2020-07-17 12:01:26,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:01:26,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:01:26,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:01:26,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:01:26,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:01:25" (1/3) ... [2020-07-17 12:01:26,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b743a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:01:26, skipping insertion in model container [2020-07-17 12:01:26,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:25" (2/3) ... [2020-07-17 12:01:26,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b743a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:01:26, skipping insertion in model container [2020-07-17 12:01:26,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:01:26" (3/3) ... [2020-07-17 12:01:26,510 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-07-17 12:01:26,522 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:01:26,531 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:01:26,550 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:01:26,595 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:01:26,595 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:01:26,595 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:01:26,595 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:01:26,596 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:01:26,596 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:01:26,596 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:01:26,596 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:01:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-17 12:01:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 12:01:26,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:26,631 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] [2020-07-17 12:01:26,632 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:26,638 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-07-17 12:01:26,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:26,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449517554] [2020-07-17 12:01:26,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:26,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449517554] [2020-07-17 12:01:26,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:26,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:26,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583724875] [2020-07-17 12:01:26,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:26,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:26,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:26,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:26,873 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-07-17 12:01:26,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:26,954 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-07-17 12:01:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:26,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-17 12:01:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:26,975 INFO L225 Difference]: With dead ends: 87 [2020-07-17 12:01:26,975 INFO L226 Difference]: Without dead ends: 72 [2020-07-17 12:01:26,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-17 12:01:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-17 12:01:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-17 12:01:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-07-17 12:01:27,036 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-07-17 12:01:27,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,037 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-07-17 12:01:27,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,037 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-07-17 12:01:27,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 12:01:27,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,039 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] [2020-07-17 12:01:27,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:01:27,040 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-07-17 12:01:27,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007610281] [2020-07-17 12:01:27,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007610281] [2020-07-17 12:01:27,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584360944] [2020-07-17 12:01:27,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,186 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-07-17 12:01:27,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,246 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-07-17 12:01:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-17 12:01:27,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,249 INFO L225 Difference]: With dead ends: 117 [2020-07-17 12:01:27,249 INFO L226 Difference]: Without dead ends: 72 [2020-07-17 12:01:27,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-17 12:01:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-07-17 12:01:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-17 12:01:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-07-17 12:01:27,264 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-07-17 12:01:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,265 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-07-17 12:01:27,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-07-17 12:01:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:01:27,266 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:27,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:01:27,267 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-07-17 12:01:27,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991367666] [2020-07-17 12:01:27,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991367666] [2020-07-17 12:01:27,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930465876] [2020-07-17 12:01:27,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,369 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-07-17 12:01:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,391 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-07-17 12:01:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-17 12:01:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,394 INFO L225 Difference]: With dead ends: 108 [2020-07-17 12:01:27,394 INFO L226 Difference]: Without dead ends: 75 [2020-07-17 12:01:27,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-17 12:01:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-07-17 12:01:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-17 12:01:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-07-17 12:01:27,406 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-07-17 12:01:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,407 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-07-17 12:01:27,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-07-17 12:01:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:01:27,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:27,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:01:27,409 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,410 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-07-17 12:01:27,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711182851] [2020-07-17 12:01:27,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711182851] [2020-07-17 12:01:27,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866910540] [2020-07-17 12:01:27,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,456 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-07-17 12:01:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,477 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-07-17 12:01:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-17 12:01:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,480 INFO L225 Difference]: With dead ends: 136 [2020-07-17 12:01:27,480 INFO L226 Difference]: Without dead ends: 134 [2020-07-17 12:01:27,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-17 12:01:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-07-17 12:01:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-17 12:01:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-07-17 12:01:27,493 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-07-17 12:01:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,494 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-07-17 12:01:27,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-07-17 12:01:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:01:27,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:27,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:01:27,496 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-07-17 12:01:27,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925882364] [2020-07-17 12:01:27,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925882364] [2020-07-17 12:01:27,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783333049] [2020-07-17 12:01:27,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,570 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-07-17 12:01:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,622 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-07-17 12:01:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-17 12:01:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,629 INFO L225 Difference]: With dead ends: 224 [2020-07-17 12:01:27,629 INFO L226 Difference]: Without dead ends: 136 [2020-07-17 12:01:27,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-17 12:01:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-07-17 12:01:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-17 12:01:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-07-17 12:01:27,663 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-07-17 12:01:27,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,663 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-07-17 12:01:27,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-07-17 12:01:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:01:27,665 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:27,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 12:01:27,666 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-07-17 12:01:27,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190015136] [2020-07-17 12:01:27,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190015136] [2020-07-17 12:01:27,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960319454] [2020-07-17 12:01:27,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,711 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-07-17 12:01:27,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,736 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-07-17 12:01:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-17 12:01:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,738 INFO L225 Difference]: With dead ends: 201 [2020-07-17 12:01:27,739 INFO L226 Difference]: Without dead ends: 138 [2020-07-17 12:01:27,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-17 12:01:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-17 12:01:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-17 12:01:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-07-17 12:01:27,752 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-07-17 12:01:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,753 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-07-17 12:01:27,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-07-17 12:01:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:01:27,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:27,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 12:01:27,755 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,756 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-07-17 12:01:27,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492882721] [2020-07-17 12:01:27,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492882721] [2020-07-17 12:01:27,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409554604] [2020-07-17 12:01:27,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,822 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-07-17 12:01:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,843 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-07-17 12:01:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-17 12:01:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,846 INFO L225 Difference]: With dead ends: 252 [2020-07-17 12:01:27,846 INFO L226 Difference]: Without dead ends: 250 [2020-07-17 12:01:27,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-17 12:01:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-07-17 12:01:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-17 12:01:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-07-17 12:01:27,860 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-07-17 12:01:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,861 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-07-17 12:01:27,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-07-17 12:01:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:01:27,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:27,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 12:01:27,863 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-07-17 12:01:27,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379693381] [2020-07-17 12:01:27,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379693381] [2020-07-17 12:01:27,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950978744] [2020-07-17 12:01:27,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,899 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-07-17 12:01:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,922 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-07-17 12:01:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-17 12:01:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:27,925 INFO L225 Difference]: With dead ends: 432 [2020-07-17 12:01:27,925 INFO L226 Difference]: Without dead ends: 258 [2020-07-17 12:01:27,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-17 12:01:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-07-17 12:01:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-17 12:01:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-07-17 12:01:27,940 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-07-17 12:01:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:27,941 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-07-17 12:01:27,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-07-17 12:01:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-17 12:01:27,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:27,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:27,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 12:01:27,944 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:27,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-07-17 12:01:27,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:27,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505294717] [2020-07-17 12:01:27,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:27,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505294717] [2020-07-17 12:01:27,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:27,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:27,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264352270] [2020-07-17 12:01:27,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:27,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:27,978 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-07-17 12:01:27,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:27,997 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-07-17 12:01:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:27,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-17 12:01:27,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,000 INFO L225 Difference]: With dead ends: 384 [2020-07-17 12:01:28,000 INFO L226 Difference]: Without dead ends: 262 [2020-07-17 12:01:28,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-17 12:01:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-07-17 12:01:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-17 12:01:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-07-17 12:01:28,014 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-07-17 12:01:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,014 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-07-17 12:01:28,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-07-17 12:01:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-17 12:01:28,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:28,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 12:01:28,017 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-07-17 12:01:28,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736353097] [2020-07-17 12:01:28,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736353097] [2020-07-17 12:01:28,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188291141] [2020-07-17 12:01:28,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,051 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-07-17 12:01:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,078 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-07-17 12:01:28,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-17 12:01:28,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,082 INFO L225 Difference]: With dead ends: 476 [2020-07-17 12:01:28,082 INFO L226 Difference]: Without dead ends: 474 [2020-07-17 12:01:28,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-07-17 12:01:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-07-17 12:01:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-07-17 12:01:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-07-17 12:01:28,097 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-07-17 12:01:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,098 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-07-17 12:01:28,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-07-17 12:01:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-17 12:01:28,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:28,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 12:01:28,100 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-07-17 12:01:28,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371291732] [2020-07-17 12:01:28,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371291732] [2020-07-17 12:01:28,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134870534] [2020-07-17 12:01:28,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,129 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-07-17 12:01:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,157 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-07-17 12:01:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-17 12:01:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,161 INFO L225 Difference]: With dead ends: 844 [2020-07-17 12:01:28,161 INFO L226 Difference]: Without dead ends: 498 [2020-07-17 12:01:28,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-07-17 12:01:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-07-17 12:01:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-07-17 12:01:28,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-07-17 12:01:28,181 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-07-17 12:01:28,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,181 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-07-17 12:01:28,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-07-17 12:01:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:01:28,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:28,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 12:01:28,184 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-07-17 12:01:28,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272315665] [2020-07-17 12:01:28,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272315665] [2020-07-17 12:01:28,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128947429] [2020-07-17 12:01:28,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,225 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-07-17 12:01:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,248 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-07-17 12:01:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-17 12:01:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,252 INFO L225 Difference]: With dead ends: 744 [2020-07-17 12:01:28,252 INFO L226 Difference]: Without dead ends: 506 [2020-07-17 12:01:28,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-07-17 12:01:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-07-17 12:01:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-07-17 12:01:28,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-07-17 12:01:28,270 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-07-17 12:01:28,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,271 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-07-17 12:01:28,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,271 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-07-17 12:01:28,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:01:28,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:28,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 12:01:28,273 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-07-17 12:01:28,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390485594] [2020-07-17 12:01:28,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390485594] [2020-07-17 12:01:28,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147043122] [2020-07-17 12:01:28,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,300 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-07-17 12:01:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,325 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-07-17 12:01:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-17 12:01:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,331 INFO L225 Difference]: With dead ends: 908 [2020-07-17 12:01:28,331 INFO L226 Difference]: Without dead ends: 906 [2020-07-17 12:01:28,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-07-17 12:01:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-07-17 12:01:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-07-17 12:01:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-07-17 12:01:28,355 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-07-17 12:01:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,356 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-07-17 12:01:28,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-07-17 12:01:28,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:01:28,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:28,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 12:01:28,358 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-07-17 12:01:28,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050162620] [2020-07-17 12:01:28,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050162620] [2020-07-17 12:01:28,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003554595] [2020-07-17 12:01:28,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,385 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-07-17 12:01:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,419 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-07-17 12:01:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-17 12:01:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,425 INFO L225 Difference]: With dead ends: 1660 [2020-07-17 12:01:28,425 INFO L226 Difference]: Without dead ends: 970 [2020-07-17 12:01:28,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-07-17 12:01:28,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-07-17 12:01:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-07-17 12:01:28,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-07-17 12:01:28,462 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-07-17 12:01:28,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,462 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-07-17 12:01:28,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-07-17 12:01:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:01:28,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:28,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 12:01:28,465 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-07-17 12:01:28,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941341206] [2020-07-17 12:01:28,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941341206] [2020-07-17 12:01:28,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209450062] [2020-07-17 12:01:28,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,495 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-07-17 12:01:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,527 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-07-17 12:01:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-17 12:01:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,533 INFO L225 Difference]: With dead ends: 1452 [2020-07-17 12:01:28,533 INFO L226 Difference]: Without dead ends: 986 [2020-07-17 12:01:28,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-07-17 12:01:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-07-17 12:01:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-07-17 12:01:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-07-17 12:01:28,590 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-07-17 12:01:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,591 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-07-17 12:01:28,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-07-17 12:01:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:01:28,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:28,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 12:01:28,594 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-07-17 12:01:28,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553693077] [2020-07-17 12:01:28,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553693077] [2020-07-17 12:01:28,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440023290] [2020-07-17 12:01:28,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,620 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-07-17 12:01:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,656 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-07-17 12:01:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-17 12:01:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,667 INFO L225 Difference]: With dead ends: 1740 [2020-07-17 12:01:28,667 INFO L226 Difference]: Without dead ends: 1738 [2020-07-17 12:01:28,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-07-17 12:01:28,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-07-17 12:01:28,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-07-17 12:01:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-07-17 12:01:28,712 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-07-17 12:01:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,712 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-07-17 12:01:28,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-07-17 12:01:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:01:28,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:28,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 12:01:28,716 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-07-17 12:01:28,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585805709] [2020-07-17 12:01:28,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585805709] [2020-07-17 12:01:28,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519342792] [2020-07-17 12:01:28,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,740 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-07-17 12:01:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,788 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-07-17 12:01:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-17 12:01:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,799 INFO L225 Difference]: With dead ends: 3276 [2020-07-17 12:01:28,799 INFO L226 Difference]: Without dead ends: 1898 [2020-07-17 12:01:28,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-07-17 12:01:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-07-17 12:01:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-07-17 12:01:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-07-17 12:01:28,862 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-07-17 12:01:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:28,862 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-07-17 12:01:28,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-07-17 12:01:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:01:28,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:28,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:28,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 12:01:28,866 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:28,866 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-07-17 12:01:28,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:28,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918356456] [2020-07-17 12:01:28,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:28,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918356456] [2020-07-17 12:01:28,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:28,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:28,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241036450] [2020-07-17 12:01:28,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:28,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:28,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:28,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,890 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-07-17 12:01:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:28,937 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-07-17 12:01:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:28,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-17 12:01:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:28,947 INFO L225 Difference]: With dead ends: 2844 [2020-07-17 12:01:28,947 INFO L226 Difference]: Without dead ends: 1930 [2020-07-17 12:01:28,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-07-17 12:01:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-07-17 12:01:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-07-17 12:01:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-07-17 12:01:29,010 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-07-17 12:01:29,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:29,011 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-07-17 12:01:29,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-07-17 12:01:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:01:29,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:29,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:29,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 12:01:29,015 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:29,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-07-17 12:01:29,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:29,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134039564] [2020-07-17 12:01:29,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:29,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134039564] [2020-07-17 12:01:29,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:29,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:29,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902193876] [2020-07-17 12:01:29,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:29,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:29,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,044 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-07-17 12:01:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:29,125 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-07-17 12:01:29,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:29,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-17 12:01:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:29,146 INFO L225 Difference]: With dead ends: 3340 [2020-07-17 12:01:29,146 INFO L226 Difference]: Without dead ends: 3338 [2020-07-17 12:01:29,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-07-17 12:01:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-07-17 12:01:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-07-17 12:01:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-07-17 12:01:29,277 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-07-17 12:01:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:29,277 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-07-17 12:01:29,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-07-17 12:01:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:01:29,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:29,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:29,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 12:01:29,285 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:29,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-07-17 12:01:29,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:29,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480917652] [2020-07-17 12:01:29,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:29,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480917652] [2020-07-17 12:01:29,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:29,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:29,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28426620] [2020-07-17 12:01:29,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:29,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:29,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,320 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-07-17 12:01:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:29,420 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-07-17 12:01:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:29,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-17 12:01:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:29,438 INFO L225 Difference]: With dead ends: 6476 [2020-07-17 12:01:29,439 INFO L226 Difference]: Without dead ends: 3722 [2020-07-17 12:01:29,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-07-17 12:01:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-07-17 12:01:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-07-17 12:01:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-07-17 12:01:29,565 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-07-17 12:01:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:29,566 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-07-17 12:01:29,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-07-17 12:01:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:01:29,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:29,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:29,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 12:01:29,572 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:29,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-07-17 12:01:29,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:29,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727225081] [2020-07-17 12:01:29,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:29,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727225081] [2020-07-17 12:01:29,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:29,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:29,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568537891] [2020-07-17 12:01:29,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:29,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:29,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,597 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-07-17 12:01:29,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:29,669 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-07-17 12:01:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:29,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-17 12:01:29,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:29,688 INFO L225 Difference]: With dead ends: 5580 [2020-07-17 12:01:29,688 INFO L226 Difference]: Without dead ends: 3786 [2020-07-17 12:01:29,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-07-17 12:01:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-07-17 12:01:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-07-17 12:01:29,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-07-17 12:01:29,840 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-07-17 12:01:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:29,840 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-07-17 12:01:29,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-07-17 12:01:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:01:29,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:29,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:29,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 12:01:29,848 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:29,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-07-17 12:01:29,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:29,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663586501] [2020-07-17 12:01:29,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:29,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663586501] [2020-07-17 12:01:29,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:29,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:29,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468629643] [2020-07-17 12:01:29,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:29,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:29,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:29,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:29,880 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-07-17 12:01:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:30,005 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-07-17 12:01:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:30,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-17 12:01:30,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:30,060 INFO L225 Difference]: With dead ends: 10956 [2020-07-17 12:01:30,061 INFO L226 Difference]: Without dead ends: 7306 [2020-07-17 12:01:30,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-07-17 12:01:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-07-17 12:01:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-07-17 12:01:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-07-17 12:01:30,286 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-07-17 12:01:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:30,287 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-07-17 12:01:30,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-07-17 12:01:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:01:30,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:30,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:30,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 12:01:30,298 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:30,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:30,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-07-17 12:01:30,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:30,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079889122] [2020-07-17 12:01:30,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:30,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079889122] [2020-07-17 12:01:30,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:30,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:30,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326101463] [2020-07-17 12:01:30,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:30,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:30,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:30,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:30,340 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-07-17 12:01:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:30,534 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-07-17 12:01:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:30,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-17 12:01:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:30,553 INFO L225 Difference]: With dead ends: 8076 [2020-07-17 12:01:30,553 INFO L226 Difference]: Without dead ends: 8074 [2020-07-17 12:01:30,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-07-17 12:01:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-07-17 12:01:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-07-17 12:01:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-07-17 12:01:30,750 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-07-17 12:01:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:30,750 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-07-17 12:01:30,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-07-17 12:01:30,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:01:30,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:30,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:30,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 12:01:30,761 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:30,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:30,762 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-07-17 12:01:30,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:30,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427393266] [2020-07-17 12:01:30,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:30,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427393266] [2020-07-17 12:01:30,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:30,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:30,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163486211] [2020-07-17 12:01:30,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:30,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:30,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:30,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:30,789 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-07-17 12:01:30,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:30,980 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-07-17 12:01:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:30,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-17 12:01:30,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:31,005 INFO L225 Difference]: With dead ends: 12172 [2020-07-17 12:01:31,006 INFO L226 Difference]: Without dead ends: 12170 [2020-07-17 12:01:31,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-07-17 12:01:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-07-17 12:01:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-07-17 12:01:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-07-17 12:01:31,352 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-07-17 12:01:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:31,352 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-07-17 12:01:31,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-07-17 12:01:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:01:31,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:31,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:31,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 12:01:31,375 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:31,376 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-07-17 12:01:31,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:31,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868208184] [2020-07-17 12:01:31,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:31,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868208184] [2020-07-17 12:01:31,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:31,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:31,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744760191] [2020-07-17 12:01:31,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:31,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:31,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:31,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:31,402 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-07-17 12:01:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:31,645 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-07-17 12:01:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:31,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-17 12:01:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:31,678 INFO L225 Difference]: With dead ends: 25228 [2020-07-17 12:01:31,678 INFO L226 Difference]: Without dead ends: 14218 [2020-07-17 12:01:31,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-07-17 12:01:32,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-07-17 12:01:32,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-07-17 12:01:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-07-17 12:01:32,141 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-07-17 12:01:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:32,142 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-07-17 12:01:32,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-07-17 12:01:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 12:01:32,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:32,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:32,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 12:01:32,162 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-07-17 12:01:32,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:32,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027592251] [2020-07-17 12:01:32,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:32,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027592251] [2020-07-17 12:01:32,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:32,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:32,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752819807] [2020-07-17 12:01:32,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:32,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:32,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:32,187 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-07-17 12:01:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:32,377 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-07-17 12:01:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:32,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-17 12:01:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:32,406 INFO L225 Difference]: With dead ends: 21516 [2020-07-17 12:01:32,406 INFO L226 Difference]: Without dead ends: 14602 [2020-07-17 12:01:32,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-07-17 12:01:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-07-17 12:01:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-07-17 12:01:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-07-17 12:01:32,854 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-07-17 12:01:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:32,855 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-07-17 12:01:32,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-07-17 12:01:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 12:01:32,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:32,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:32,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-17 12:01:32,875 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:32,875 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-07-17 12:01:32,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:32,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484325978] [2020-07-17 12:01:32,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:32,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484325978] [2020-07-17 12:01:32,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:32,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:32,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926369535] [2020-07-17 12:01:32,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:32,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:32,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:32,898 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-07-17 12:01:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:33,246 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-07-17 12:01:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:33,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-17 12:01:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:33,308 INFO L225 Difference]: With dead ends: 23562 [2020-07-17 12:01:33,308 INFO L226 Difference]: Without dead ends: 23560 [2020-07-17 12:01:33,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-07-17 12:01:34,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-07-17 12:01:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-07-17 12:01:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-07-17 12:01:34,322 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-07-17 12:01:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:34,322 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-07-17 12:01:34,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-07-17 12:01:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 12:01:34,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:34,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:34,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-17 12:01:34,368 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:34,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:34,368 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-07-17 12:01:34,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:34,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751026717] [2020-07-17 12:01:34,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:34,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751026717] [2020-07-17 12:01:34,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:34,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:34,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132617235] [2020-07-17 12:01:34,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:34,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:34,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:34,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:34,421 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-07-17 12:01:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:34,908 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-07-17 12:01:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:34,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-17 12:01:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:34,909 INFO L225 Difference]: With dead ends: 50184 [2020-07-17 12:01:34,909 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:01:34,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:01:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:01:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:01:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:01:34,972 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-07-17 12:01:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:34,973 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:01:34,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:01:34,973 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:01:34,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-17 12:01:34,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:01:35,010 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 12:01:35,010 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:01:35,011 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:01:35,011 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:01:35,011 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:01:35,011 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:01:35,011 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-07-17 12:01:35,011 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-07-17 12:01:35,011 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,011 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,012 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,012 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,012 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-07-17 12:01:35,012 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,012 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-07-17 12:01:35,012 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,012 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,012 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,012 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-07-17 12:01:35,013 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-07-17 12:01:35,013 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-07-17 12:01:35,013 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-07-17 12:01:35,013 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-07-17 12:01:35,013 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-07-17 12:01:35,015 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-07-17 12:01:35,015 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,016 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,016 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-07-17 12:01:35,016 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-07-17 12:01:35,016 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,016 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,016 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,016 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,016 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,017 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-17 12:01:35,017 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,017 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-07-17 12:01:35,017 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,017 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-07-17 12:01:35,017 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-07-17 12:01:35,017 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,017 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-07-17 12:01:35,018 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-07-17 12:01:35,018 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-07-17 12:01:35,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:01:35 BoogieIcfgContainer [2020-07-17 12:01:35,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:01:35,040 INFO L168 Benchmark]: Toolchain (without parser) took 9362.20 ms. Allocated memory was 137.9 MB in the beginning and 664.8 MB in the end (delta: 526.9 MB). Free memory was 101.7 MB in the beginning and 491.2 MB in the end (delta: -389.6 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:35,044 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 12:01:35,045 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.48 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 90.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:35,052 INFO L168 Benchmark]: Boogie Preprocessor took 124.22 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 90.6 MB in the beginning and 180.0 MB in the end (delta: -89.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:35,053 INFO L168 Benchmark]: RCFGBuilder took 390.61 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 160.3 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:35,053 INFO L168 Benchmark]: TraceAbstraction took 8535.70 ms. Allocated memory was 201.9 MB in the beginning and 664.8 MB in the end (delta: 462.9 MB). Free memory was 160.3 MB in the beginning and 491.2 MB in the end (delta: -330.9 MB). Peak memory consumption was 132.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:35,054 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.48 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 90.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.22 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 90.6 MB in the beginning and 180.0 MB in the end (delta: -89.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 390.61 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 160.3 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8535.70 ms. Allocated memory was 201.9 MB in the beginning and 664.8 MB in the end (delta: 462.9 MB). Free memory was 160.3 MB in the beginning and 491.2 MB in the end (delta: -330.9 MB). Peak memory consumption was 132.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.3s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...