/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:40:37,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:40:37,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:40:37,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-04 16:40:37,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:40:37,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:40:37,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:40:37,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:40:37,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:40:37,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:40:37,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:40:37,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:40:37,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:40:37,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:40:37,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:40:37,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:40:37,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:40:37,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:40:37,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:40:37,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:40:37,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:40:37,696 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:40:37,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:40:37,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:40:37,700 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:40:37,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:40:37,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:40:37,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:40:37,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:40:37,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:40:37,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:40:37,703 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:40:37,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:40:37,703 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:40:37,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:40:37,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:40:37,704 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:40:37,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:40:37,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:40:37,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:40:37,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:40:37,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:40:37,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:40:37,706 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:40:38,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:40:38,271 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:40:38,277 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:40:38,279 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:40:38,280 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:40:38,282 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-04 16:40:38,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4bc70f68/9f3720c369cb4a4585641a37ecc856fb/FLAG952dc5d26 [2020-09-04 16:40:39,061 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:40:39,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-04 16:40:39,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4bc70f68/9f3720c369cb4a4585641a37ecc856fb/FLAG952dc5d26 [2020-09-04 16:40:39,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4bc70f68/9f3720c369cb4a4585641a37ecc856fb [2020-09-04 16:40:39,404 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:40:39,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:40:39,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:40:39,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:40:39,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:40:39,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:40:39" (1/1) ... [2020-09-04 16:40:39,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178b68b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39, skipping insertion in model container [2020-09-04 16:40:39,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:40:39" (1/1) ... [2020-09-04 16:40:39,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:40:39,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:40:39,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:40:39,747 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:40:39,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:40:39,801 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:40:39,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39 WrapperNode [2020-09-04 16:40:39,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:40:39,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:40:39,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:40:39,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:40:39,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39" (1/1) ... [2020-09-04 16:40:39,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39" (1/1) ... [2020-09-04 16:40:39,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39" (1/1) ... [2020-09-04 16:40:39,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39" (1/1) ... [2020-09-04 16:40:39,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39" (1/1) ... [2020-09-04 16:40:39,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39" (1/1) ... [2020-09-04 16:40:39,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39" (1/1) ... [2020-09-04 16:40:39,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:40:39,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:40:39,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:40:39,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:40:39,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:40:40,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:40:40,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:40:40,043 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-04 16:40:40,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:40:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:40:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:40:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 16:40:40,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:40:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:40:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 16:40:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:40:40,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:40:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:40:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:40:40,464 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:40:40,467 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 16:40:40,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:40:40 BoogieIcfgContainer [2020-09-04 16:40:40,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:40:40,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:40:40,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:40:40,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:40:40,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:40:39" (1/3) ... [2020-09-04 16:40:40,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f311379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:40:40, skipping insertion in model container [2020-09-04 16:40:40,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:39" (2/3) ... [2020-09-04 16:40:40,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f311379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:40:40, skipping insertion in model container [2020-09-04 16:40:40,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:40:40" (3/3) ... [2020-09-04 16:40:40,487 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-04 16:40:40,501 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:40:40,514 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:40:40,538 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:40:40,572 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:40:40,572 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:40:40,572 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:40:40,572 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:40:40,572 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:40:40,573 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:40:40,573 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:40:40,573 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:40:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-09-04 16:40:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 16:40:40,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:40,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:40,613 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-09-04 16:40:40,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:40,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815787628] [2020-09-04 16:40:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:40,725 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:40,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:40,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:40:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:40,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815787628] [2020-09-04 16:40:40,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:40,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:40:40,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32849306] [2020-09-04 16:40:41,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:40:41,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:40:41,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:40:41,029 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-09-04 16:40:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:41,293 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-09-04 16:40:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:40:41,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-04 16:40:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:41,312 INFO L225 Difference]: With dead ends: 102 [2020-09-04 16:40:41,312 INFO L226 Difference]: Without dead ends: 53 [2020-09-04 16:40:41,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:40:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-04 16:40:41,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-04 16:40:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-04 16:40:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-04 16:40:41,382 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-09-04 16:40:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:41,382 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-04 16:40:41,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:40:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-04 16:40:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-04 16:40:41,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:41,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:41,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:40:41,387 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:41,388 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-09-04 16:40:41,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:41,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188618874] [2020-09-04 16:40:41,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:41,393 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:41,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:41,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-04 16:40:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:41,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188618874] [2020-09-04 16:40:41,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:41,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:40:41,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339533341] [2020-09-04 16:40:41,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:40:41,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:41,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:40:41,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:40:41,511 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-09-04 16:40:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:41,684 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-09-04 16:40:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 16:40:41,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-09-04 16:40:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:41,688 INFO L225 Difference]: With dead ends: 92 [2020-09-04 16:40:41,688 INFO L226 Difference]: Without dead ends: 62 [2020-09-04 16:40:41,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:40:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-04 16:40:41,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-09-04 16:40:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 16:40:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-04 16:40:41,708 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-09-04 16:40:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:41,709 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-04 16:40:41,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:40:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-04 16:40:41,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 16:40:41,712 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:41,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:41,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:40:41,713 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:41,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:41,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-09-04 16:40:41,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:41,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089651750] [2020-09-04 16:40:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:41,762 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:41,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:41,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 16:40:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:41,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089651750] [2020-09-04 16:40:41,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:41,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 16:40:41,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062679366] [2020-09-04 16:40:41,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 16:40:41,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:41,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 16:40:41,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:40:41,952 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-09-04 16:40:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:42,226 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-09-04 16:40:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:40:42,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-04 16:40:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:42,229 INFO L225 Difference]: With dead ends: 102 [2020-09-04 16:40:42,229 INFO L226 Difference]: Without dead ends: 72 [2020-09-04 16:40:42,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:40:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-04 16:40:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-09-04 16:40:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 16:40:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-04 16:40:42,245 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-09-04 16:40:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:42,245 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-04 16:40:42,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 16:40:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-04 16:40:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-04 16:40:42,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:42,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:42,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:40:42,249 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:42,250 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-09-04 16:40:42,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:42,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043842654] [2020-09-04 16:40:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:42,269 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:42,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:42,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 16:40:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:42,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043842654] [2020-09-04 16:40:42,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:42,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:40:42,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360580821] [2020-09-04 16:40:42,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:40:42,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:42,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:40:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:40:42,431 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-09-04 16:40:42,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:42,658 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-09-04 16:40:42,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 16:40:42,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-04 16:40:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:42,660 INFO L225 Difference]: With dead ends: 112 [2020-09-04 16:40:42,661 INFO L226 Difference]: Without dead ends: 82 [2020-09-04 16:40:42,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-04 16:40:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-04 16:40:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-09-04 16:40:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 16:40:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-09-04 16:40:42,675 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-09-04 16:40:42,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:42,676 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-09-04 16:40:42,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:40:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-09-04 16:40:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-04 16:40:42,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:42,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:42,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:40:42,679 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:42,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:42,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-09-04 16:40:42,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:42,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008755339] [2020-09-04 16:40:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:42,689 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:42,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:42,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 16:40:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:42,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008755339] [2020-09-04 16:40:42,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:42,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 16:40:42,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941653102] [2020-09-04 16:40:42,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 16:40:42,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:42,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 16:40:42,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:40:42,887 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-09-04 16:40:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:43,208 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-09-04 16:40:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 16:40:43,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-04 16:40:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:43,211 INFO L225 Difference]: With dead ends: 122 [2020-09-04 16:40:43,212 INFO L226 Difference]: Without dead ends: 92 [2020-09-04 16:40:43,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:40:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-04 16:40:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-04 16:40:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 16:40:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-04 16:40:43,243 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-09-04 16:40:43,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:43,244 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-04 16:40:43,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 16:40:43,245 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-04 16:40:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 16:40:43,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:43,255 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:43,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:40:43,256 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-09-04 16:40:43,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:43,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896651372] [2020-09-04 16:40:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:43,269 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:43,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:43,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-04 16:40:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:43,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896651372] [2020-09-04 16:40:43,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:43,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 16:40:43,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272106790] [2020-09-04 16:40:43,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 16:40:43,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:43,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 16:40:43,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-04 16:40:43,513 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-09-04 16:40:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:43,858 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-09-04 16:40:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 16:40:43,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-04 16:40:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:43,860 INFO L225 Difference]: With dead ends: 132 [2020-09-04 16:40:43,860 INFO L226 Difference]: Without dead ends: 102 [2020-09-04 16:40:43,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-04 16:40:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-04 16:40:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-09-04 16:40:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 16:40:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-09-04 16:40:43,874 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-09-04 16:40:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:43,875 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-09-04 16:40:43,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 16:40:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-09-04 16:40:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-04 16:40:43,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:43,877 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:43,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:40:43,878 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:43,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-09-04 16:40:43,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:43,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909918742] [2020-09-04 16:40:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:43,886 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:44,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:44,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-04 16:40:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:44,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909918742] [2020-09-04 16:40:44,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:44,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 16:40:44,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671871120] [2020-09-04 16:40:44,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 16:40:44,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 16:40:44,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-04 16:40:44,107 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-09-04 16:40:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:44,525 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-09-04 16:40:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 16:40:44,526 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-09-04 16:40:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:44,528 INFO L225 Difference]: With dead ends: 142 [2020-09-04 16:40:44,528 INFO L226 Difference]: Without dead ends: 112 [2020-09-04 16:40:44,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-04 16:40:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-04 16:40:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-09-04 16:40:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-04 16:40:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-09-04 16:40:44,542 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-09-04 16:40:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:44,543 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-09-04 16:40:44,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 16:40:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-09-04 16:40:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-04 16:40:44,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:44,545 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:44,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:40:44,545 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:44,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:44,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-09-04 16:40:44,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:44,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836538243] [2020-09-04 16:40:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:44,560 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:44,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:44,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-04 16:40:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:44,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836538243] [2020-09-04 16:40:44,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:44,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-04 16:40:44,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189650930] [2020-09-04 16:40:44,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 16:40:44,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:44,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 16:40:44,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:40:44,839 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-09-04 16:40:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:45,191 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-09-04 16:40:45,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 16:40:45,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-09-04 16:40:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:45,194 INFO L225 Difference]: With dead ends: 152 [2020-09-04 16:40:45,194 INFO L226 Difference]: Without dead ends: 122 [2020-09-04 16:40:45,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-04 16:40:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-04 16:40:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-09-04 16:40:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 16:40:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-04 16:40:45,207 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-09-04 16:40:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:45,208 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-04 16:40:45,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 16:40:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-04 16:40:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 16:40:45,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:45,210 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:45,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 16:40:45,210 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-09-04 16:40:45,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:45,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720749145] [2020-09-04 16:40:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:45,218 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:45,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:45,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-04 16:40:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:45,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720749145] [2020-09-04 16:40:45,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:45,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-04 16:40:45,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113465299] [2020-09-04 16:40:45,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 16:40:45,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:45,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 16:40:45,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-04 16:40:45,496 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-09-04 16:40:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:45,964 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-09-04 16:40:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 16:40:45,965 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-09-04 16:40:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:45,966 INFO L225 Difference]: With dead ends: 162 [2020-09-04 16:40:45,966 INFO L226 Difference]: Without dead ends: 132 [2020-09-04 16:40:45,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:40:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-04 16:40:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-04 16:40:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-04 16:40:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-09-04 16:40:45,987 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-09-04 16:40:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:45,988 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-09-04 16:40:45,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 16:40:45,988 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-09-04 16:40:45,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-04 16:40:45,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:45,989 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:45,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 16:40:45,990 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:45,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:45,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-09-04 16:40:45,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:45,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853875576] [2020-09-04 16:40:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:45,997 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:46,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:46,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-04 16:40:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:46,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853875576] [2020-09-04 16:40:46,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:46,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-09-04 16:40:46,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897999132] [2020-09-04 16:40:46,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 16:40:46,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:46,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 16:40:46,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-04 16:40:46,325 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-09-04 16:40:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:46,848 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-09-04 16:40:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 16:40:46,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-09-04 16:40:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:46,851 INFO L225 Difference]: With dead ends: 172 [2020-09-04 16:40:46,851 INFO L226 Difference]: Without dead ends: 142 [2020-09-04 16:40:46,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 16:40:46,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-04 16:40:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-09-04 16:40:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-04 16:40:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-09-04 16:40:46,866 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-09-04 16:40:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:46,867 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-09-04 16:40:46,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 16:40:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-09-04 16:40:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-04 16:40:46,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:46,869 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:46,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 16:40:46,869 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:46,870 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-09-04 16:40:46,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:46,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027774830] [2020-09-04 16:40:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:46,880 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:47,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:47,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-04 16:40:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:47,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027774830] [2020-09-04 16:40:47,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:47,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-09-04 16:40:47,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543747963] [2020-09-04 16:40:47,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 16:40:47,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:47,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 16:40:47,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-04 16:40:47,229 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-09-04 16:40:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:48,055 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-09-04 16:40:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 16:40:48,056 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-09-04 16:40:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:48,058 INFO L225 Difference]: With dead ends: 182 [2020-09-04 16:40:48,059 INFO L226 Difference]: Without dead ends: 152 [2020-09-04 16:40:48,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 16:40:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-04 16:40:48,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-09-04 16:40:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-04 16:40:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-09-04 16:40:48,079 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-09-04 16:40:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:48,081 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-09-04 16:40:48,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 16:40:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-09-04 16:40:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-04 16:40:48,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:48,084 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:48,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 16:40:48,085 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-09-04 16:40:48,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:48,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417961804] [2020-09-04 16:40:48,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:48,098 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:48,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:48,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-04 16:40:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:48,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417961804] [2020-09-04 16:40:48,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:48,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-09-04 16:40:48,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375674591] [2020-09-04 16:40:48,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 16:40:48,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 16:40:48,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-04 16:40:48,645 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-09-04 16:40:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:49,472 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-09-04 16:40:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 16:40:49,474 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-09-04 16:40:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:49,477 INFO L225 Difference]: With dead ends: 192 [2020-09-04 16:40:49,477 INFO L226 Difference]: Without dead ends: 162 [2020-09-04 16:40:49,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 16:40:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-04 16:40:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-09-04 16:40:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-04 16:40:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-09-04 16:40:49,494 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-09-04 16:40:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:49,495 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-09-04 16:40:49,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 16:40:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-09-04 16:40:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-04 16:40:49,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:49,499 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:49,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 16:40:49,499 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-09-04 16:40:49,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:49,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353176156] [2020-09-04 16:40:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:49,513 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:50,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:50,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-04 16:40:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:50,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353176156] [2020-09-04 16:40:50,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:50,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-09-04 16:40:50,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731055550] [2020-09-04 16:40:50,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 16:40:50,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:50,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 16:40:50,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-04 16:40:50,162 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-09-04 16:40:50,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:50,837 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-09-04 16:40:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 16:40:50,838 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-09-04 16:40:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:50,839 INFO L225 Difference]: With dead ends: 202 [2020-09-04 16:40:50,839 INFO L226 Difference]: Without dead ends: 172 [2020-09-04 16:40:50,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 16:40:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-04 16:40:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-09-04 16:40:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-04 16:40:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-09-04 16:40:50,859 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-09-04 16:40:50,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:50,859 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-09-04 16:40:50,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 16:40:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-09-04 16:40:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-04 16:40:50,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:50,862 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:50,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 16:40:50,863 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:50,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-09-04 16:40:50,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:50,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055159222] [2020-09-04 16:40:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:50,882 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:51,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:51,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-04 16:40:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:51,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055159222] [2020-09-04 16:40:51,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:51,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-09-04 16:40:51,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594907786] [2020-09-04 16:40:51,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 16:40:51,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 16:40:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-04 16:40:51,462 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-09-04 16:40:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:52,386 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-09-04 16:40:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-04 16:40:52,387 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-09-04 16:40:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:52,389 INFO L225 Difference]: With dead ends: 212 [2020-09-04 16:40:52,389 INFO L226 Difference]: Without dead ends: 182 [2020-09-04 16:40:52,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 16:40:52,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-04 16:40:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-09-04 16:40:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-04 16:40:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-09-04 16:40:52,407 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-09-04 16:40:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:52,408 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-09-04 16:40:52,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 16:40:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-09-04 16:40:52,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-04 16:40:52,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:52,412 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:52,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 16:40:52,412 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-09-04 16:40:52,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:52,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588500979] [2020-09-04 16:40:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:52,426 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:53,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:53,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-04 16:40:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:53,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588500979] [2020-09-04 16:40:53,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:53,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-09-04 16:40:53,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879715070] [2020-09-04 16:40:53,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 16:40:53,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:53,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 16:40:53,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-04 16:40:53,064 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-09-04 16:40:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:54,114 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-09-04 16:40:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-04 16:40:54,115 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-09-04 16:40:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:54,117 INFO L225 Difference]: With dead ends: 222 [2020-09-04 16:40:54,117 INFO L226 Difference]: Without dead ends: 192 [2020-09-04 16:40:54,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 16:40:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-04 16:40:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-09-04 16:40:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-04 16:40:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-09-04 16:40:54,136 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-09-04 16:40:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:54,137 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-09-04 16:40:54,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 16:40:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-09-04 16:40:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-04 16:40:54,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:54,140 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:54,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 16:40:54,140 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:54,141 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-09-04 16:40:54,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:54,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951633687] [2020-09-04 16:40:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:54,168 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:54,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:54,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-04 16:40:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:54,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951633687] [2020-09-04 16:40:54,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:54,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-09-04 16:40:54,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940012694] [2020-09-04 16:40:54,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 16:40:54,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:54,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 16:40:54,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:40:54,789 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-09-04 16:40:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:55,972 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-09-04 16:40:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-04 16:40:55,973 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-09-04 16:40:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:55,976 INFO L225 Difference]: With dead ends: 232 [2020-09-04 16:40:55,976 INFO L226 Difference]: Without dead ends: 202 [2020-09-04 16:40:55,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 16:40:55,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-04 16:40:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-09-04 16:40:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-04 16:40:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-09-04 16:40:55,988 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-09-04 16:40:55,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:55,988 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-09-04 16:40:55,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 16:40:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-09-04 16:40:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-04 16:40:55,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:55,991 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:55,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 16:40:55,992 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:55,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-09-04 16:40:55,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:55,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290110319] [2020-09-04 16:40:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:56,002 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:56,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:56,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-04 16:40:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:56,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290110319] [2020-09-04 16:40:56,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:56,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-09-04 16:40:56,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657952297] [2020-09-04 16:40:56,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 16:40:56,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:56,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 16:40:56,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 16:40:56,700 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-09-04 16:40:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:57,988 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-09-04 16:40:57,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-04 16:40:57,988 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-09-04 16:40:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:57,990 INFO L225 Difference]: With dead ends: 242 [2020-09-04 16:40:57,991 INFO L226 Difference]: Without dead ends: 212 [2020-09-04 16:40:57,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 16:40:57,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-04 16:40:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-09-04 16:40:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-04 16:40:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-09-04 16:40:58,004 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-09-04 16:40:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:58,005 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-09-04 16:40:58,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 16:40:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-09-04 16:40:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-04 16:40:58,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:58,008 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:58,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 16:40:58,008 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-09-04 16:40:58,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:58,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850533028] [2020-09-04 16:40:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:58,019 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:58,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:58,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-04 16:40:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:58,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850533028] [2020-09-04 16:40:58,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:58,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-09-04 16:40:58,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852742435] [2020-09-04 16:40:58,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 16:40:58,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:58,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 16:40:58,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 16:40:58,844 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-09-04 16:41:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:41:00,344 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-09-04 16:41:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-04 16:41:00,345 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-09-04 16:41:00,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:41:00,349 INFO L225 Difference]: With dead ends: 252 [2020-09-04 16:41:00,350 INFO L226 Difference]: Without dead ends: 222 [2020-09-04 16:41:00,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 16:41:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-04 16:41:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-09-04 16:41:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-04 16:41:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-09-04 16:41:00,366 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-09-04 16:41:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:41:00,367 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-09-04 16:41:00,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 16:41:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-09-04 16:41:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-04 16:41:00,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:41:00,370 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:41:00,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 16:41:00,371 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:41:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:41:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-09-04 16:41:00,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:41:00,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85771162] [2020-09-04 16:41:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:41:00,386 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:41:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:41:01,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:41:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:41:01,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-04 16:41:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:41:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:41:01,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85771162] [2020-09-04 16:41:01,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:41:01,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-09-04 16:41:01,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721311591] [2020-09-04 16:41:01,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 16:41:01,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:41:01,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 16:41:01,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 16:41:01,307 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-09-04 16:41:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:41:02,827 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-09-04 16:41:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-04 16:41:02,831 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-09-04 16:41:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:41:02,834 INFO L225 Difference]: With dead ends: 262 [2020-09-04 16:41:02,835 INFO L226 Difference]: Without dead ends: 232 [2020-09-04 16:41:02,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 16:41:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-04 16:41:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-09-04 16:41:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-04 16:41:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-09-04 16:41:02,849 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-09-04 16:41:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:41:02,850 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-09-04 16:41:02,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 16:41:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-09-04 16:41:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-04 16:41:02,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:41:02,854 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:41:02,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 16:41:02,855 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:41:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:41:02,856 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-09-04 16:41:02,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:41:02,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49431391] [2020-09-04 16:41:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:41:02,864 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:41:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:41:03,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:41:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:41:03,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-09-04 16:41:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:41:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:41:03,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49431391] [2020-09-04 16:41:03,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:41:03,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-09-04 16:41:03,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850058306] [2020-09-04 16:41:03,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 16:41:03,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:41:03,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 16:41:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 16:41:03,915 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 40 states. [2020-09-04 16:41:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:41:05,587 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-09-04 16:41:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-09-04 16:41:05,588 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 219 [2020-09-04 16:41:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:41:05,591 INFO L225 Difference]: With dead ends: 272 [2020-09-04 16:41:05,591 INFO L226 Difference]: Without dead ends: 242 [2020-09-04 16:41:05,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 16:41:05,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-04 16:41:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2020-09-04 16:41:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-04 16:41:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-09-04 16:41:05,602 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 219 [2020-09-04 16:41:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:41:05,602 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-09-04 16:41:05,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 16:41:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-09-04 16:41:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-04 16:41:05,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:41:05,606 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:41:05,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 16:41:05,606 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:41:05,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:41:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash 669563575, now seen corresponding path program 19 times [2020-09-04 16:41:05,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:41:05,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985891953] [2020-09-04 16:41:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:41:05,619 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:41:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:41:06,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:41:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:41:06,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-09-04 16:41:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:41:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:41:06,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985891953] [2020-09-04 16:41:06,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:41:06,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-09-04 16:41:06,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490842363] [2020-09-04 16:41:06,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 16:41:06,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:41:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 16:41:06,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 16:41:06,671 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 42 states. [2020-09-04 16:41:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:41:08,364 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2020-09-04 16:41:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-04 16:41:08,364 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 229 [2020-09-04 16:41:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:41:08,366 INFO L225 Difference]: With dead ends: 274 [2020-09-04 16:41:08,366 INFO L226 Difference]: Without dead ends: 244 [2020-09-04 16:41:08,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 16:41:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-04 16:41:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-09-04 16:41:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-09-04 16:41:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2020-09-04 16:41:08,385 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 229 [2020-09-04 16:41:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:41:08,386 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2020-09-04 16:41:08,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 16:41:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2020-09-04 16:41:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-09-04 16:41:08,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:41:08,388 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:41:08,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 16:41:08,389 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:41:08,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:41:08,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1024771811, now seen corresponding path program 20 times [2020-09-04 16:41:08,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:41:08,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266801663] [2020-09-04 16:41:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:41:08,408 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:41:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:41:08,594 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:41:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:41:08,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:41:08,983 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:41:08,983 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:41:08,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 16:41:09,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:41:09 BoogieIcfgContainer [2020-09-04 16:41:09,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:41:09,080 INFO L168 Benchmark]: Toolchain (without parser) took 29665.99 ms. Allocated memory was 138.9 MB in the beginning and 472.4 MB in the end (delta: 333.4 MB). Free memory was 101.6 MB in the beginning and 380.8 MB in the end (delta: -279.2 MB). Peak memory consumption was 54.2 MB. Max. memory is 7.1 GB. [2020-09-04 16:41:09,083 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 138.9 MB. Free memory was 119.8 MB in the beginning and 119.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-04 16:41:09,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.60 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 91.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:41:09,084 INFO L168 Benchmark]: Boogie Preprocessor took 150.42 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.1 MB in the beginning and 179.2 MB in the end (delta: -88.1 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-09-04 16:41:09,088 INFO L168 Benchmark]: RCFGBuilder took 520.46 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 160.1 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:41:09,089 INFO L168 Benchmark]: TraceAbstraction took 28593.83 ms. Allocated memory was 201.9 MB in the beginning and 472.4 MB in the end (delta: 270.5 MB). Free memory was 160.1 MB in the beginning and 380.8 MB in the end (delta: -220.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:41:09,094 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 138.9 MB. Free memory was 119.8 MB in the beginning and 119.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 393.60 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 91.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.42 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.1 MB in the beginning and 179.2 MB in the end (delta: -88.1 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 520.46 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 160.1 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28593.83 ms. Allocated memory was 201.9 MB in the beginning and 472.4 MB in the end (delta: 270.5 MB). Free memory was 160.1 MB in the beginning and 380.8 MB in the end (delta: -220.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.4s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 16.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1023 SDtfs, 1875 SDslu, 11317 SDs, 0 SdLazy, 5156 SolverSat, 320 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 906 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7391 ImplicationChecksByTransitivity, 16.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=244occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 21 MinimizatonAttempts, 152 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...