/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_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:07:03,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:07:03,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:07:03,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:07:03,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:07:03,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:07:03,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:07:03,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:07:03,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:07:03,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:07:03,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:07:03,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:07:03,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:07:03,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:07:03,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:07:03,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:07:03,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:07:03,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:07:03,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:07:03,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:07:03,557 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:07:03,592 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:07:03,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:07:03,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:07:03,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:07:03,596 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:07:03,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:07:03,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:07:03,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:07:03,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:07:03,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:07:03,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:07:03,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:07:03,598 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:07:03,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:07:03,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:07:03,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:07:03,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:07:03,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:07:03,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:07:03,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:07:03,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:07:03,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:07:03,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:07:03,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:07:03,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:07:03,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:07:04,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:07:04,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:07:04,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:07:04,173 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:07:04,174 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:07:04,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label57.c [2020-12-22 03:07:04,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6fe1c369/d1a3ef5743f64fa7878a035e341189db/FLAG6dba3004a [2020-12-22 03:07:05,727 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:07:05,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label57.c [2020-12-22 03:07:05,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6fe1c369/d1a3ef5743f64fa7878a035e341189db/FLAG6dba3004a [2020-12-22 03:07:05,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6fe1c369/d1a3ef5743f64fa7878a035e341189db [2020-12-22 03:07:05,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:07:05,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:07:05,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:07:05,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:07:05,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:07:05,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:07:05" (1/1) ... [2020-12-22 03:07:05,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4465857a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:05, skipping insertion in model container [2020-12-22 03:07:05,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:07:05" (1/1) ... [2020-12-22 03:07:06,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:07:06,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:07:06,905 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_label57.c[7333,7346] [2020-12-22 03:07:09,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:07:09,101 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:07:09,171 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_label57.c[7333,7346] [2020-12-22 03:07:10,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:07:10,453 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:07:10,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10 WrapperNode [2020-12-22 03:07:10,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:07:10,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:07:10,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:07:10,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:07:10,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (1/1) ... [2020-12-22 03:07:10,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (1/1) ... [2020-12-22 03:07:11,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:07:11,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:07:11,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:07:11,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:07:11,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (1/1) ... [2020-12-22 03:07:11,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (1/1) ... [2020-12-22 03:07:12,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (1/1) ... [2020-12-22 03:07:12,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (1/1) ... [2020-12-22 03:07:13,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (1/1) ... [2020-12-22 03:07:13,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (1/1) ... [2020-12-22 03:07:13,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (1/1) ... [2020-12-22 03:07:14,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:07:14,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:07:14,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:07:14,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:07:14,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (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 03:07:14,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:07:14,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:07:14,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:07:14,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:07:29,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:07:29,045 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 03:07:29,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:07:29 BoogieIcfgContainer [2020-12-22 03:07:29,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:07:29,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:07:29,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:07:29,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:07:29,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:07:05" (1/3) ... [2020-12-22 03:07:29,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2244a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:07:29, skipping insertion in model container [2020-12-22 03:07:29,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:07:10" (2/3) ... [2020-12-22 03:07:29,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2244a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:07:29, skipping insertion in model container [2020-12-22 03:07:29,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:07:29" (3/3) ... [2020-12-22 03:07:29,064 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label57.c [2020-12-22 03:07:29,074 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:07:29,096 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:07:29,123 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:07:29,168 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:07:29,168 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:07:29,169 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:07:29,169 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:07:29,169 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:07:29,169 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:07:29,169 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:07:29,169 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:07:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states. [2020-12-22 03:07:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 03:07:29,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:07:29,240 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:07:29,240 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:07:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:07:29,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2158734, now seen corresponding path program 1 times [2020-12-22 03:07:29,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:07:29,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078830617] [2020-12-22 03:07:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:07:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:07:29,828 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 03:07:29,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078830617] [2020-12-22 03:07:29,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:07:29,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:07:29,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521114086] [2020-12-22 03:07:29,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:07:29,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:07:29,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:07:29,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:07:29,863 INFO L87 Difference]: Start difference. First operand 1748 states. Second operand 3 states. [2020-12-22 03:07:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:07:46,126 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2020-12-22 03:07:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:07:46,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 03:07:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:07:46,195 INFO L225 Difference]: With dead ends: 4957 [2020-12-22 03:07:46,195 INFO L226 Difference]: Without dead ends: 3129 [2020-12-22 03:07:46,210 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 03:07:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2020-12-22 03:07:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2020-12-22 03:07:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3108 states. [2020-12-22 03:07:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2020-12-22 03:07:46,465 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 56 [2020-12-22 03:07:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:07:46,468 INFO L481 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2020-12-22 03:07:46,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:07:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2020-12-22 03:07:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 03:07:46,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:07:46,489 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, 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] [2020-12-22 03:07:46,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:07:46,491 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:07:46,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:07:46,495 INFO L82 PathProgramCache]: Analyzing trace with hash 839123000, now seen corresponding path program 1 times [2020-12-22 03:07:46,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:07:46,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363984423] [2020-12-22 03:07:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:07:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:07:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:07:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363984423] [2020-12-22 03:07:46,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:07:46,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:07:46,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830099675] [2020-12-22 03:07:46,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:07:46,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:07:46,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:07:46,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:07:46,854 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand 3 states. [2020-12-22 03:08:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:08:05,279 INFO L93 Difference]: Finished difference Result 9153 states and 14687 transitions. [2020-12-22 03:08:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:08:05,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2020-12-22 03:08:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:08:05,328 INFO L225 Difference]: With dead ends: 9153 [2020-12-22 03:08:05,328 INFO L226 Difference]: Without dead ends: 6047 [2020-12-22 03:08:05,342 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 03:08:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2020-12-22 03:08:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 6031. [2020-12-22 03:08:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6031 states. [2020-12-22 03:08:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 8460 transitions. [2020-12-22 03:08:05,547 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 8460 transitions. Word has length 123 [2020-12-22 03:08:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:08:05,550 INFO L481 AbstractCegarLoop]: Abstraction has 6031 states and 8460 transitions. [2020-12-22 03:08:05,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:08:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 8460 transitions. [2020-12-22 03:08:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 03:08:05,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:08:05,558 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, 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] [2020-12-22 03:08:05,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:08:05,558 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:08:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:08:05,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2063707020, now seen corresponding path program 1 times [2020-12-22 03:08:05,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:08:05,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093324579] [2020-12-22 03:08:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:08:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:08:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:08:05,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093324579] [2020-12-22 03:08:05,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:08:05,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:08:05,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40192583] [2020-12-22 03:08:05,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:08:05,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:08:05,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:08:05,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:08:05,943 INFO L87 Difference]: Start difference. First operand 6031 states and 8460 transitions. Second operand 4 states. [2020-12-22 03:08:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:08:37,802 INFO L93 Difference]: Finished difference Result 19026 states and 26262 transitions. [2020-12-22 03:08:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:08:37,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 03:08:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:08:37,871 INFO L225 Difference]: With dead ends: 19026 [2020-12-22 03:08:37,871 INFO L226 Difference]: Without dead ends: 12997 [2020-12-22 03:08:37,883 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 03:08:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12997 states. [2020-12-22 03:08:38,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12997 to 12911. [2020-12-22 03:08:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12911 states. [2020-12-22 03:08:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17380 transitions. [2020-12-22 03:08:38,186 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17380 transitions. Word has length 125 [2020-12-22 03:08:38,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:08:38,187 INFO L481 AbstractCegarLoop]: Abstraction has 12911 states and 17380 transitions. [2020-12-22 03:08:38,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:08:38,187 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17380 transitions. [2020-12-22 03:08:38,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-12-22 03:08:38,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:08:38,195 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:08:38,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:08:38,195 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:08:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:08:38,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1920113971, now seen corresponding path program 1 times [2020-12-22 03:08:38,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:08:38,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035133677] [2020-12-22 03:08:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:08:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:08:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 03:08:39,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035133677] [2020-12-22 03:08:39,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:08:39,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:08:39,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267843104] [2020-12-22 03:08:39,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:08:39,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:08:39,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:08:39,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:08:39,507 INFO L87 Difference]: Start difference. First operand 12911 states and 17380 transitions. Second operand 4 states. [2020-12-22 03:08:55,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:08:55,038 INFO L93 Difference]: Finished difference Result 24486 states and 33412 transitions. [2020-12-22 03:08:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:08:55,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 360 [2020-12-22 03:08:55,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:08:55,093 INFO L225 Difference]: With dead ends: 24486 [2020-12-22 03:08:55,094 INFO L226 Difference]: Without dead ends: 12911 [2020-12-22 03:08:55,106 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 03:08:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2020-12-22 03:08:55,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 12911. [2020-12-22 03:08:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12911 states. [2020-12-22 03:08:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17371 transitions. [2020-12-22 03:08:55,360 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17371 transitions. Word has length 360 [2020-12-22 03:08:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:08:55,362 INFO L481 AbstractCegarLoop]: Abstraction has 12911 states and 17371 transitions. [2020-12-22 03:08:55,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:08:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17371 transitions. [2020-12-22 03:08:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-12-22 03:08:55,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:08:55,374 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, 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] [2020-12-22 03:08:55,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:08:55,374 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:08:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:08:55,375 INFO L82 PathProgramCache]: Analyzing trace with hash 56204980, now seen corresponding path program 1 times [2020-12-22 03:08:55,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:08:55,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623021604] [2020-12-22 03:08:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:08:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:08:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 03:08:56,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623021604] [2020-12-22 03:08:56,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677785248] [2020-12-22 03:08:56,552 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 03:08:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:08:56,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 03:08:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:08:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-22 03:08:58,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 03:08:58,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-12-22 03:08:58,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831045240] [2020-12-22 03:08:58,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:08:58,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:08:58,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:08:58,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:08:58,078 INFO L87 Difference]: Start difference. First operand 12911 states and 17371 transitions. Second operand 3 states. [2020-12-22 03:09:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:09:17,611 INFO L93 Difference]: Finished difference Result 35414 states and 48549 transitions. [2020-12-22 03:09:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:09:17,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 534 [2020-12-22 03:09:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:09:17,680 INFO L225 Difference]: With dead ends: 35414 [2020-12-22 03:09:17,681 INFO L226 Difference]: Without dead ends: 23870 [2020-12-22 03:09:17,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 533 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 03:09:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23870 states. [2020-12-22 03:09:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23870 to 23866. [2020-12-22 03:09:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23866 states. [2020-12-22 03:09:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23866 states to 23866 states and 30252 transitions. [2020-12-22 03:09:18,266 INFO L78 Accepts]: Start accepts. Automaton has 23866 states and 30252 transitions. Word has length 534 [2020-12-22 03:09:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:09:18,267 INFO L481 AbstractCegarLoop]: Abstraction has 23866 states and 30252 transitions. [2020-12-22 03:09:18,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:09:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 23866 states and 30252 transitions. [2020-12-22 03:09:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2020-12-22 03:09:18,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:09:18,284 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:18,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:09:18,498 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:09:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:09:18,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2099208255, now seen corresponding path program 1 times [2020-12-22 03:09:18,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:09:18,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645970157] [2020-12-22 03:09:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:09:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:09:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-22 03:09:19,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645970157] [2020-12-22 03:09:19,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:09:19,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:09:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042260020] [2020-12-22 03:09:19,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:09:19,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:09:19,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:09:19,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:09:19,482 INFO L87 Difference]: Start difference. First operand 23866 states and 30252 transitions. Second operand 3 states. [2020-12-22 03:09:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:09:38,404 INFO L93 Difference]: Finished difference Result 55931 states and 70570 transitions. [2020-12-22 03:09:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:09:38,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 608 [2020-12-22 03:09:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:09:38,474 INFO L225 Difference]: With dead ends: 55931 [2020-12-22 03:09:38,474 INFO L226 Difference]: Without dead ends: 33432 [2020-12-22 03:09:38,504 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 03:09:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33432 states. [2020-12-22 03:09:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33432 to 33422. [2020-12-22 03:09:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33422 states. [2020-12-22 03:09:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33422 states to 33422 states and 40115 transitions. [2020-12-22 03:09:39,197 INFO L78 Accepts]: Start accepts. Automaton has 33422 states and 40115 transitions. Word has length 608 [2020-12-22 03:09:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:09:39,198 INFO L481 AbstractCegarLoop]: Abstraction has 33422 states and 40115 transitions. [2020-12-22 03:09:39,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:09:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 33422 states and 40115 transitions. [2020-12-22 03:09:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2020-12-22 03:09:39,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:09:39,225 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:09:39,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 03:09:39,226 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:09:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:09:39,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1588496972, now seen corresponding path program 1 times [2020-12-22 03:09:39,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:09:39,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949026533] [2020-12-22 03:09:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:09:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:09:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-12-22 03:09:40,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949026533] [2020-12-22 03:09:40,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:09:40,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:09:40,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112433259] [2020-12-22 03:09:40,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:09:40,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:09:40,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:09:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:09:40,055 INFO L87 Difference]: Start difference. First operand 33422 states and 40115 transitions. Second operand 3 states. [2020-12-22 03:10:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:10:07,032 INFO L93 Difference]: Finished difference Result 97081 states and 116999 transitions. [2020-12-22 03:10:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:10:07,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 611 [2020-12-22 03:10:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:10:07,140 INFO L225 Difference]: With dead ends: 97081 [2020-12-22 03:10:07,140 INFO L226 Difference]: Without dead ends: 65026 [2020-12-22 03:10:07,170 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 03:10:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65026 states. [2020-12-22 03:10:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65026 to 60928. [2020-12-22 03:10:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60928 states. [2020-12-22 03:10:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60928 states to 60928 states and 72174 transitions. [2020-12-22 03:10:08,293 INFO L78 Accepts]: Start accepts. Automaton has 60928 states and 72174 transitions. Word has length 611 [2020-12-22 03:10:08,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:10:08,295 INFO L481 AbstractCegarLoop]: Abstraction has 60928 states and 72174 transitions. [2020-12-22 03:10:08,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:10:08,295 INFO L276 IsEmpty]: Start isEmpty. Operand 60928 states and 72174 transitions. [2020-12-22 03:10:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-12-22 03:10:08,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:10:08,305 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, 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, 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] [2020-12-22 03:10:08,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 03:10:08,305 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:10:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:10:08,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2111807729, now seen corresponding path program 1 times [2020-12-22 03:10:08,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:10:08,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619195741] [2020-12-22 03:10:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:10:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:10:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 19 proven. 88 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-22 03:10:10,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619195741] [2020-12-22 03:10:10,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938277223] [2020-12-22 03:10:10,812 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 03:10:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:10:11,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 03:10:11,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:10:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-22 03:10:13,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 03:10:13,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 03:10:13,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583436603] [2020-12-22 03:10:13,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:10:13,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:10:13,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:10:13,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:10:13,283 INFO L87 Difference]: Start difference. First operand 60928 states and 72174 transitions. Second operand 3 states. [2020-12-22 03:10:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:10:37,502 INFO L93 Difference]: Finished difference Result 140998 states and 169107 transitions. [2020-12-22 03:10:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:10:37,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 741 [2020-12-22 03:10:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:10:37,615 INFO L225 Difference]: With dead ends: 140998 [2020-12-22 03:10:37,615 INFO L226 Difference]: Without dead ends: 81437 [2020-12-22 03:10:37,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 740 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:10:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81437 states. [2020-12-22 03:10:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81437 to 78696. [2020-12-22 03:10:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78696 states. [2020-12-22 03:10:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78696 states to 78696 states and 91252 transitions. [2020-12-22 03:10:39,283 INFO L78 Accepts]: Start accepts. Automaton has 78696 states and 91252 transitions. Word has length 741 [2020-12-22 03:10:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:10:39,285 INFO L481 AbstractCegarLoop]: Abstraction has 78696 states and 91252 transitions. [2020-12-22 03:10:39,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:10:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 78696 states and 91252 transitions. [2020-12-22 03:10:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2020-12-22 03:10:39,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:10:39,318 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, 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, 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] [2020-12-22 03:10:39,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:10:39,519 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:10:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:10:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash -355740815, now seen corresponding path program 1 times [2020-12-22 03:10:39,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:10:39,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579880673] [2020-12-22 03:10:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:10:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:10:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 107 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:10:43,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579880673] [2020-12-22 03:10:43,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247899190] [2020-12-22 03:10:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:10:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:10:43,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 03:10:43,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:10:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-12-22 03:10:46,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 03:10:46,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-22 03:10:46,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721140429] [2020-12-22 03:10:46,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:10:46,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:10:46,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:10:46,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:10:46,258 INFO L87 Difference]: Start difference. First operand 78696 states and 91252 transitions. Second operand 3 states.