/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/eca-rers2012/Problem19_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:01:21,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:01:21,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:01:21,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:01:21,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:01:21,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:01:21,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:01:21,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:01:21,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:01:21,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:01:21,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:01:21,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:01:21,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:01:21,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:01:21,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:01:21,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:01:21,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:01:21,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:01:21,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:01:21,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:01:21,570 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:01:21,607 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:01:21,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:01:21,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:01:21,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:01:21,610 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:01:21,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:01:21,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:01:21,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:01:21,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:01:21,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:01:21,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:01:21,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:01:21,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:01:21,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:01:21,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:01:21,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:01:21,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:01:21,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:01:21,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:01:21,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:01:21,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:01:21,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:01:21,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:01:21,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:01:21,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:01:21,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:01:22,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:01:22,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:01:22,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:01:22,072 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:01:22,073 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:01:22,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label37.c [2020-12-22 03:01:22,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2341d7b8a/480294021fd644d68c10ed7849e7bf02/FLAGbba5fea37 [2020-12-22 03:01:23,677 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:01:23,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label37.c [2020-12-22 03:01:23,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2341d7b8a/480294021fd644d68c10ed7849e7bf02/FLAGbba5fea37 [2020-12-22 03:01:24,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2341d7b8a/480294021fd644d68c10ed7849e7bf02 [2020-12-22 03:01:24,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:01:24,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:01:24,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:01:24,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:01:24,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:01:24,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:01:24" (1/1) ... [2020-12-22 03:01:24,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa798fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:24, skipping insertion in model container [2020-12-22 03:01:24,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:01:24" (1/1) ... [2020-12-22 03:01:24,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:01:24,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:01:24,917 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label37.c[5183,5196] [2020-12-22 03:01:26,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:01:26,652 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:01:26,704 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label37.c[5183,5196] [2020-12-22 03:01:28,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:01:28,088 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:01:28,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28 WrapperNode [2020-12-22 03:01:28,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:01:28,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:01:28,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:01:28,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:01:28,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (1/1) ... [2020-12-22 03:01:28,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (1/1) ... [2020-12-22 03:01:29,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:01:29,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:01:29,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:01:29,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:01:29,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (1/1) ... [2020-12-22 03:01:29,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (1/1) ... [2020-12-22 03:01:29,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (1/1) ... [2020-12-22 03:01:29,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (1/1) ... [2020-12-22 03:01:30,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (1/1) ... [2020-12-22 03:01:30,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (1/1) ... [2020-12-22 03:01:31,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (1/1) ... [2020-12-22 03:01:31,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:01:31,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:01:31,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:01:31,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:01:31,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:01:31,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:01:31,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:01:31,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:01:31,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:01:43,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:01:43,193 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 03:01:43,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:01:43 BoogieIcfgContainer [2020-12-22 03:01:43,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:01:43,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:01:43,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:01:43,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:01:43,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:01:24" (1/3) ... [2020-12-22 03:01:43,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a91911c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:01:43, skipping insertion in model container [2020-12-22 03:01:43,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:01:28" (2/3) ... [2020-12-22 03:01:43,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a91911c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:01:43, skipping insertion in model container [2020-12-22 03:01:43,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:01:43" (3/3) ... [2020-12-22 03:01:43,221 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label37.c [2020-12-22 03:01:43,229 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:01:43,238 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:01:43,261 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:01:43,303 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:01:43,303 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:01:43,303 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:01:43,303 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:01:43,303 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:01:43,304 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:01:43,304 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:01:43,304 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:01:43,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states. [2020-12-22 03:01:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 03:01:43,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:01:43,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:01:43,368 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:01:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:01:43,376 INFO L82 PathProgramCache]: Analyzing trace with hash 323974986, now seen corresponding path program 1 times [2020-12-22 03:01:43,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:01:43,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833167286] [2020-12-22 03:01:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:01:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:01:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:01:43,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833167286] [2020-12-22 03:01:43,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:01:43,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:01:43,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441928801] [2020-12-22 03:01:43,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:01:43,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:01:43,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:01:43,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:01:43,849 INFO L87 Difference]: Start difference. First operand 1748 states. Second operand 3 states. [2020-12-22 03:01:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:01:58,674 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2020-12-22 03:01:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:01:58,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 03:01:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:01:58,747 INFO L225 Difference]: With dead ends: 4957 [2020-12-22 03:01:58,748 INFO L226 Difference]: Without dead ends: 3129 [2020-12-22 03:01:58,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:01:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2020-12-22 03:01:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2020-12-22 03:01:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3108 states. [2020-12-22 03:01:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2020-12-22 03:01:58,983 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 38 [2020-12-22 03:01:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:01:58,984 INFO L481 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2020-12-22 03:01:58,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:01:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2020-12-22 03:01:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 03:01:58,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:01:58,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:01:58,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:01:58,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:01:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:01:58,991 INFO L82 PathProgramCache]: Analyzing trace with hash -936904592, now seen corresponding path program 1 times [2020-12-22 03:01:58,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:01:58,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090308849] [2020-12-22 03:01:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:01:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:01:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:01:59,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090308849] [2020-12-22 03:01:59,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:01:59,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:01:59,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51480859] [2020-12-22 03:01:59,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:01:59,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:01:59,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:01:59,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:01:59,247 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand 3 states. [2020-12-22 03:02:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:02:16,026 INFO L93 Difference]: Finished difference Result 9153 states and 14687 transitions. [2020-12-22 03:02:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:02:16,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 03:02:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:02:16,067 INFO L225 Difference]: With dead ends: 9153 [2020-12-22 03:02:16,068 INFO L226 Difference]: Without dead ends: 6047 [2020-12-22 03:02:16,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:02:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2020-12-22 03:02:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 6031. [2020-12-22 03:02:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6031 states. [2020-12-22 03:02:16,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 8460 transitions. [2020-12-22 03:02:16,243 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 8460 transitions. Word has length 105 [2020-12-22 03:02:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:02:16,245 INFO L481 AbstractCegarLoop]: Abstraction has 6031 states and 8460 transitions. [2020-12-22 03:02:16,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:02:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 8460 transitions. [2020-12-22 03:02:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 03:02:16,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:02:16,257 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:02:16,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:02:16,259 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:02:16,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:02:16,262 INFO L82 PathProgramCache]: Analyzing trace with hash 149706948, now seen corresponding path program 1 times [2020-12-22 03:02:16,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:02:16,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101628228] [2020-12-22 03:02:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:02:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:02:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:02:16,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101628228] [2020-12-22 03:02:16,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:02:16,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:02:16,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490528332] [2020-12-22 03:02:16,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:02:16,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:02:16,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:02:16,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:02:16,569 INFO L87 Difference]: Start difference. First operand 6031 states and 8460 transitions. Second operand 4 states. [2020-12-22 03:02:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:02:47,500 INFO L93 Difference]: Finished difference Result 19026 states and 26262 transitions. [2020-12-22 03:02:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:02:47,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-12-22 03:02:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:02:47,579 INFO L225 Difference]: With dead ends: 19026 [2020-12-22 03:02:47,579 INFO L226 Difference]: Without dead ends: 12997 [2020-12-22 03:02:47,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:02:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12997 states. [2020-12-22 03:02:47,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12997 to 12911. [2020-12-22 03:02:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12911 states. [2020-12-22 03:02:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17380 transitions. [2020-12-22 03:02:47,973 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17380 transitions. Word has length 107 [2020-12-22 03:02:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:02:47,974 INFO L481 AbstractCegarLoop]: Abstraction has 12911 states and 17380 transitions. [2020-12-22 03:02:47,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:02:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17380 transitions. [2020-12-22 03:02:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-12-22 03:02:47,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:02:47,982 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:02:47,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:02:47,983 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:02:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:02:47,984 INFO L82 PathProgramCache]: Analyzing trace with hash 670406475, now seen corresponding path program 1 times [2020-12-22 03:02:47,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:02:47,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737342958] [2020-12-22 03:02:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:02:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:02:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 03:02:49,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737342958] [2020-12-22 03:02:49,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:02:49,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:02:49,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741777917] [2020-12-22 03:02:49,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:02:49,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:02:49,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:02:49,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:02:49,008 INFO L87 Difference]: Start difference. First operand 12911 states and 17380 transitions. Second operand 4 states. [2020-12-22 03:03:10,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:03:10,957 INFO L93 Difference]: Finished difference Result 24486 states and 33412 transitions. [2020-12-22 03:03:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:03:10,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 342 [2020-12-22 03:03:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:03:11,029 INFO L225 Difference]: With dead ends: 24486 [2020-12-22 03:03:11,029 INFO L226 Difference]: Without dead ends: 12911 [2020-12-22 03:03:11,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:03:11,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2020-12-22 03:03:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 12911. [2020-12-22 03:03:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12911 states. [2020-12-22 03:03:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17371 transitions. [2020-12-22 03:03:11,389 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17371 transitions. Word has length 342 [2020-12-22 03:03:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:03:11,390 INFO L481 AbstractCegarLoop]: Abstraction has 12911 states and 17371 transitions. [2020-12-22 03:03:11,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:03:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17371 transitions. [2020-12-22 03:03:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2020-12-22 03:03:11,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:03:11,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:03:11,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:03:11,403 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:03:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:03:11,404 INFO L82 PathProgramCache]: Analyzing trace with hash -235004884, now seen corresponding path program 1 times [2020-12-22 03:03:11,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:03:11,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829693313] [2020-12-22 03:03:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:03:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:03:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:03:14,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829693313] [2020-12-22 03:03:14,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683567375] [2020-12-22 03:03:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:03:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:03:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 03:03:14,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:03:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:03:16,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 03:03:16,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 03:03:16,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386320261] [2020-12-22 03:03:16,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:03:16,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:03:16,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:03:16,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:03:16,443 INFO L87 Difference]: Start difference. First operand 12911 states and 17371 transitions. Second operand 3 states. [2020-12-22 03:03:45,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:03:45,872 INFO L93 Difference]: Finished difference Result 30050 states and 41077 transitions. [2020-12-22 03:03:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:03:45,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 516 [2020-12-22 03:03:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:03:45,942 INFO L225 Difference]: With dead ends: 30050 [2020-12-22 03:03:45,942 INFO L226 Difference]: Without dead ends: 18506 [2020-12-22 03:03:45,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:03:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18506 states. [2020-12-22 03:03:46,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18506 to 18422. [2020-12-22 03:03:46,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18422 states. [2020-12-22 03:03:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18422 states to 18422 states and 23754 transitions. [2020-12-22 03:03:46,532 INFO L78 Accepts]: Start accepts. Automaton has 18422 states and 23754 transitions. Word has length 516 [2020-12-22 03:03:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:03:46,534 INFO L481 AbstractCegarLoop]: Abstraction has 18422 states and 23754 transitions. [2020-12-22 03:03:46,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:03:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 18422 states and 23754 transitions. [2020-12-22 03:03:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2020-12-22 03:03:46,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:03:46,548 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:03:46,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:03:46,763 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:03:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:03:46,765 INFO L82 PathProgramCache]: Analyzing trace with hash 954577436, now seen corresponding path program 1 times [2020-12-22 03:03:46,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:03:46,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724457988] [2020-12-22 03:03:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:03:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:03:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:03:47,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724457988] [2020-12-22 03:03:47,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:03:47,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:03:47,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66659880] [2020-12-22 03:03:47,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:03:47,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:03:47,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:03:47,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:03:47,366 INFO L87 Difference]: Start difference. First operand 18422 states and 23754 transitions. Second operand 3 states. [2020-12-22 03:04:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:04:23,747 INFO L93 Difference]: Finished difference Result 35563 states and 46298 transitions. [2020-12-22 03:04:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:04:23,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 525 [2020-12-22 03:04:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:04:23,822 INFO L225 Difference]: With dead ends: 35563 [2020-12-22 03:04:23,823 INFO L226 Difference]: Without dead ends: 18508 [2020-12-22 03:04:23,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:04:23,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18508 states. [2020-12-22 03:04:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18508 to 18429. [2020-12-22 03:04:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18429 states. [2020-12-22 03:04:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18429 states to 18429 states and 22447 transitions. [2020-12-22 03:04:24,279 INFO L78 Accepts]: Start accepts. Automaton has 18429 states and 22447 transitions. Word has length 525 [2020-12-22 03:04:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:04:24,281 INFO L481 AbstractCegarLoop]: Abstraction has 18429 states and 22447 transitions. [2020-12-22 03:04:24,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:04:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 18429 states and 22447 transitions. [2020-12-22 03:04:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2020-12-22 03:04:24,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:04:24,304 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:04:24,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 03:04:24,305 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:04:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:04:24,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1897987000, now seen corresponding path program 1 times [2020-12-22 03:04:24,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:04:24,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079301940] [2020-12-22 03:04:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:04:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:04:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 71 proven. 37 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 03:04:25,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079301940] [2020-12-22 03:04:25,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657489912] [2020-12-22 03:04:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:04:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:04:25,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 03:04:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:04:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:04:29,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 03:04:29,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-22 03:04:29,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034279044] [2020-12-22 03:04:29,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:04:29,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:04:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:04:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:04:29,306 INFO L87 Difference]: Start difference. First operand 18429 states and 22447 transitions. Second operand 3 states. [2020-12-22 03:04:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:04:58,434 INFO L93 Difference]: Finished difference Result 51879 states and 63696 transitions. [2020-12-22 03:04:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:04:58,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 584 [2020-12-22 03:04:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:04:58,516 INFO L225 Difference]: With dead ends: 51879 [2020-12-22 03:04:58,516 INFO L226 Difference]: Without dead ends: 34817 [2020-12-22 03:04:58,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:04:58,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34817 states. [2020-12-22 03:04:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34817 to 34813. [2020-12-22 03:04:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34813 states. [2020-12-22 03:04:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34813 states to 34813 states and 41518 transitions. [2020-12-22 03:04:59,262 INFO L78 Accepts]: Start accepts. Automaton has 34813 states and 41518 transitions. Word has length 584 [2020-12-22 03:04:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:04:59,263 INFO L481 AbstractCegarLoop]: Abstraction has 34813 states and 41518 transitions. [2020-12-22 03:04:59,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:04:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 34813 states and 41518 transitions. [2020-12-22 03:04:59,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2020-12-22 03:04:59,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:04:59,269 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:04:59,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:04:59,484 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:04:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:04:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash 735282623, now seen corresponding path program 1 times [2020-12-22 03:04:59,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:04:59,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301627944] [2020-12-22 03:04:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:04:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:05:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-12-22 03:05:00,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301627944] [2020-12-22 03:05:00,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:05:00,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:05:00,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924371746] [2020-12-22 03:05:00,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:05:00,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:05:00,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:05:00,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:05:00,591 INFO L87 Difference]: Start difference. First operand 34813 states and 41518 transitions. Second operand 3 states.