/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/Problem03_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 23:31:34,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 23:31:34,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 23:31:34,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 23:31:34,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 23:31:34,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 23:31:34,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 23:31:34,747 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 23:31:34,806 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 23:31:34,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 23:31:34,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 23:31:34,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 23:31:34,811 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 23:31:34,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 23:31:34,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 23:31:34,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 23:31:34,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 23:31:34,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 23:31:34,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 23:31:34,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 23:31:34,812 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 23:31:34,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 23:31:34,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 23:31:34,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 23:31:34,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 23:31:34,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:31:34,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 23:31:34,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 23:31:34,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 23:31:34,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 23:31:34,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 23:31:34,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 23:31:34,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 23:31:34,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 23:31:35,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 23:31:35,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 23:31:35,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 23:31:35,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 23:31:35,276 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 23:31:35,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label18.c [2020-12-21 23:31:35,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e906d4c4/f2b710ca1d8c46ad889e4b01eb857e97/FLAG8aad21ade [2020-12-21 23:31:36,367 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 23:31:36,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label18.c [2020-12-21 23:31:36,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e906d4c4/f2b710ca1d8c46ad889e4b01eb857e97/FLAG8aad21ade [2020-12-21 23:31:36,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e906d4c4/f2b710ca1d8c46ad889e4b01eb857e97 [2020-12-21 23:31:36,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 23:31:36,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 23:31:36,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 23:31:36,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 23:31:36,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 23:31:36,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:31:36" (1/1) ... [2020-12-21 23:31:36,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22386c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:36, skipping insertion in model container [2020-12-21 23:31:36,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:31:36" (1/1) ... [2020-12-21 23:31:36,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 23:31:36,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 23:31:37,224 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/Problem03_label18.c[61636,61649] [2020-12-21 23:31:37,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:31:37,266 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 23:31:37,539 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/Problem03_label18.c[61636,61649] [2020-12-21 23:31:37,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:31:37,577 INFO L208 MainTranslator]: Completed translation [2020-12-21 23:31:37,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37 WrapperNode [2020-12-21 23:31:37,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 23:31:37,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 23:31:37,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 23:31:37,579 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 23:31:37,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (1/1) ... [2020-12-21 23:31:37,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (1/1) ... [2020-12-21 23:31:37,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 23:31:37,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 23:31:37,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 23:31:37,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 23:31:37,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (1/1) ... [2020-12-21 23:31:37,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (1/1) ... [2020-12-21 23:31:37,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (1/1) ... [2020-12-21 23:31:37,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (1/1) ... [2020-12-21 23:31:37,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (1/1) ... [2020-12-21 23:31:37,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (1/1) ... [2020-12-21 23:31:37,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (1/1) ... [2020-12-21 23:31:37,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 23:31:37,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 23:31:37,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 23:31:37,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 23:31:37,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (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 [2020-12-21 23:31:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 23:31:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 23:31:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 23:31:38,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 23:31:40,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 23:31:40,359 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-21 23:31:40,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:31:40 BoogieIcfgContainer [2020-12-21 23:31:40,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 23:31:40,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 23:31:40,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 23:31:40,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 23:31:40,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:31:36" (1/3) ... [2020-12-21 23:31:40,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6475de8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:31:40, skipping insertion in model container [2020-12-21 23:31:40,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:31:37" (2/3) ... [2020-12-21 23:31:40,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6475de8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:31:40, skipping insertion in model container [2020-12-21 23:31:40,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:31:40" (3/3) ... [2020-12-21 23:31:40,371 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label18.c [2020-12-21 23:31:40,378 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 23:31:40,389 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 23:31:40,409 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 23:31:40,440 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 23:31:40,441 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 23:31:40,441 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 23:31:40,441 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 23:31:40,441 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 23:31:40,441 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 23:31:40,442 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 23:31:40,442 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 23:31:40,465 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states. [2020-12-21 23:31:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-12-21 23:31:40,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:40,487 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:31:40,488 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:31:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:31:40,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2057722499, now seen corresponding path program 1 times [2020-12-21 23:31:40,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:31:40,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124534481] [2020-12-21 23:31:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:31:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:31:41,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124534481] [2020-12-21 23:31:41,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:31:41,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:31:41,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583883875] [2020-12-21 23:31:41,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:31:41,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:31:41,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:31:41,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:31:41,523 INFO L87 Difference]: Start difference. First operand 302 states. Second operand 3 states. [2020-12-21 23:31:43,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:31:43,038 INFO L93 Difference]: Finished difference Result 810 states and 1445 transitions. [2020-12-21 23:31:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:31:43,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2020-12-21 23:31:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:31:43,071 INFO L225 Difference]: With dead ends: 810 [2020-12-21 23:31:43,071 INFO L226 Difference]: Without dead ends: 444 [2020-12-21 23:31:43,082 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 [2020-12-21 23:31:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-12-21 23:31:43,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2020-12-21 23:31:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-12-21 23:31:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 633 transitions. [2020-12-21 23:31:43,162 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 633 transitions. Word has length 203 [2020-12-21 23:31:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:31:43,164 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 633 transitions. [2020-12-21 23:31:43,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:31:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 633 transitions. [2020-12-21 23:31:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-21 23:31:43,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:43,176 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 23:31:43,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 23:31:43,178 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:31:43,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:31:43,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1790864508, now seen corresponding path program 1 times [2020-12-21 23:31:43,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:31:43,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701782961] [2020-12-21 23:31:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:31:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:31:43,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701782961] [2020-12-21 23:31:43,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:31:43,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:31:43,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320270385] [2020-12-21 23:31:43,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:31:43,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:31:43,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:31:43,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:31:43,412 INFO L87 Difference]: Start difference. First operand 444 states and 633 transitions. Second operand 3 states. [2020-12-21 23:31:44,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:31:44,679 INFO L93 Difference]: Finished difference Result 1312 states and 1878 transitions. [2020-12-21 23:31:44,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:31:44,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2020-12-21 23:31:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:31:44,686 INFO L225 Difference]: With dead ends: 1312 [2020-12-21 23:31:44,687 INFO L226 Difference]: Without dead ends: 870 [2020-12-21 23:31:44,690 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 [2020-12-21 23:31:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2020-12-21 23:31:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2020-12-21 23:31:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2020-12-21 23:31:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1192 transitions. [2020-12-21 23:31:44,747 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1192 transitions. Word has length 211 [2020-12-21 23:31:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:31:44,747 INFO L481 AbstractCegarLoop]: Abstraction has 856 states and 1192 transitions. [2020-12-21 23:31:44,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:31:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1192 transitions. [2020-12-21 23:31:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-21 23:31:44,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:44,753 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2020-12-21 23:31:44,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 23:31:44,754 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:31:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:31:44,755 INFO L82 PathProgramCache]: Analyzing trace with hash 551804157, now seen corresponding path program 1 times [2020-12-21 23:31:44,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:31:44,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733043886] [2020-12-21 23:31:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:31:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 23:31:44,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733043886] [2020-12-21 23:31:44,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:31:44,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:31:44,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048004637] [2020-12-21 23:31:44,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:31:44,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:31:44,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:31:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:31:44,973 INFO L87 Difference]: Start difference. First operand 856 states and 1192 transitions. Second operand 3 states. [2020-12-21 23:31:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:31:46,244 INFO L93 Difference]: Finished difference Result 2535 states and 3531 transitions. [2020-12-21 23:31:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:31:46,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 223 [2020-12-21 23:31:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:31:46,254 INFO L225 Difference]: With dead ends: 2535 [2020-12-21 23:31:46,254 INFO L226 Difference]: Without dead ends: 1681 [2020-12-21 23:31:46,257 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 [2020-12-21 23:31:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2020-12-21 23:31:46,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1680. [2020-12-21 23:31:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1680 states. [2020-12-21 23:31:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2198 transitions. [2020-12-21 23:31:46,304 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2198 transitions. Word has length 223 [2020-12-21 23:31:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:31:46,305 INFO L481 AbstractCegarLoop]: Abstraction has 1680 states and 2198 transitions. [2020-12-21 23:31:46,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:31:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2198 transitions. [2020-12-21 23:31:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-21 23:31:46,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:46,315 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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] [2020-12-21 23:31:46,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 23:31:46,316 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:31:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:31:46,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1535873507, now seen corresponding path program 1 times [2020-12-21 23:31:46,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:31:46,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960809989] [2020-12-21 23:31:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:31:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-21 23:31:46,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960809989] [2020-12-21 23:31:46,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:31:46,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:31:46,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127899361] [2020-12-21 23:31:46,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:31:46,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:31:46,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:31:46,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:31:46,578 INFO L87 Difference]: Start difference. First operand 1680 states and 2198 transitions. Second operand 3 states. [2020-12-21 23:31:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:31:47,782 INFO L93 Difference]: Finished difference Result 4173 states and 5623 transitions. [2020-12-21 23:31:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:31:47,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2020-12-21 23:31:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:31:47,796 INFO L225 Difference]: With dead ends: 4173 [2020-12-21 23:31:47,796 INFO L226 Difference]: Without dead ends: 2495 [2020-12-21 23:31:47,800 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 [2020-12-21 23:31:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2020-12-21 23:31:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2492. [2020-12-21 23:31:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2492 states. [2020-12-21 23:31:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3160 transitions. [2020-12-21 23:31:47,870 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3160 transitions. Word has length 237 [2020-12-21 23:31:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:31:47,870 INFO L481 AbstractCegarLoop]: Abstraction has 2492 states and 3160 transitions. [2020-12-21 23:31:47,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:31:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3160 transitions. [2020-12-21 23:31:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-21 23:31:47,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:47,879 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:31:47,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 23:31:47,880 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:31:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:31:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1424642923, now seen corresponding path program 1 times [2020-12-21 23:31:47,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:31:47,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835643975] [2020-12-21 23:31:47,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:31:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-21 23:31:48,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835643975] [2020-12-21 23:31:48,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:31:48,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:31:48,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748966801] [2020-12-21 23:31:48,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:31:48,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:31:48,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:31:48,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:31:48,042 INFO L87 Difference]: Start difference. First operand 2492 states and 3160 transitions. Second operand 4 states. [2020-12-21 23:31:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:31:49,290 INFO L93 Difference]: Finished difference Result 4959 states and 6290 transitions. [2020-12-21 23:31:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:31:49,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-12-21 23:31:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:31:49,303 INFO L225 Difference]: With dead ends: 4959 [2020-12-21 23:31:49,304 INFO L226 Difference]: Without dead ends: 2469 [2020-12-21 23:31:49,308 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 [2020-12-21 23:31:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2020-12-21 23:31:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2465. [2020-12-21 23:31:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-21 23:31:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 2972 transitions. [2020-12-21 23:31:49,364 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 2972 transitions. Word has length 241 [2020-12-21 23:31:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:31:49,364 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 2972 transitions. [2020-12-21 23:31:49,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:31:49,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 2972 transitions. [2020-12-21 23:31:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-12-21 23:31:49,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:49,373 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:31:49,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-21 23:31:49,374 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:31:49,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:31:49,374 INFO L82 PathProgramCache]: Analyzing trace with hash -710926050, now seen corresponding path program 1 times [2020-12-21 23:31:49,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:31:49,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667639458] [2020-12-21 23:31:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:31:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-21 23:31:49,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667639458] [2020-12-21 23:31:49,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187598230] [2020-12-21 23:31:49,626 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 [2020-12-21 23:31:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:49,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 23:31:49,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:31:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 23:31:50,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:31:50,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-21 23:31:50,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223451491] [2020-12-21 23:31:50,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:31:50,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:31:50,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:31:50,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:31:50,320 INFO L87 Difference]: Start difference. First operand 2465 states and 2972 transitions. Second operand 3 states. [2020-12-21 23:31:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:31:51,541 INFO L93 Difference]: Finished difference Result 7367 states and 8883 transitions. [2020-12-21 23:31:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:31:51,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 271 [2020-12-21 23:31:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:31:51,567 INFO L225 Difference]: With dead ends: 7367 [2020-12-21 23:31:51,567 INFO L226 Difference]: Without dead ends: 4904 [2020-12-21 23:31:51,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:31:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2020-12-21 23:31:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 4901. [2020-12-21 23:31:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4901 states. [2020-12-21 23:31:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4901 states to 4901 states and 5715 transitions. [2020-12-21 23:31:51,686 INFO L78 Accepts]: Start accepts. Automaton has 4901 states and 5715 transitions. Word has length 271 [2020-12-21 23:31:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:31:51,686 INFO L481 AbstractCegarLoop]: Abstraction has 4901 states and 5715 transitions. [2020-12-21 23:31:51,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:31:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4901 states and 5715 transitions. [2020-12-21 23:31:51,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-12-21 23:31:51,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:51,701 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, 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] [2020-12-21 23:31:51,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 23:31:51,916 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:31:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:31:51,918 INFO L82 PathProgramCache]: Analyzing trace with hash 779452545, now seen corresponding path program 1 times [2020-12-21 23:31:51,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:31:51,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409835758] [2020-12-21 23:31:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:31:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:31:52,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409835758] [2020-12-21 23:31:52,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:31:52,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:31:52,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487434939] [2020-12-21 23:31:52,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:31:52,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:31:52,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:31:52,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:31:52,240 INFO L87 Difference]: Start difference. First operand 4901 states and 5715 transitions. Second operand 3 states. [2020-12-21 23:31:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:31:53,321 INFO L93 Difference]: Finished difference Result 9803 states and 11433 transitions. [2020-12-21 23:31:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:31:53,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 281 [2020-12-21 23:31:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:31:53,348 INFO L225 Difference]: With dead ends: 9803 [2020-12-21 23:31:53,348 INFO L226 Difference]: Without dead ends: 4904 [2020-12-21 23:31:53,358 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 [2020-12-21 23:31:53,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2020-12-21 23:31:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 4901. [2020-12-21 23:31:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4901 states. [2020-12-21 23:31:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4901 states to 4901 states and 5572 transitions. [2020-12-21 23:31:53,475 INFO L78 Accepts]: Start accepts. Automaton has 4901 states and 5572 transitions. Word has length 281 [2020-12-21 23:31:53,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:31:53,476 INFO L481 AbstractCegarLoop]: Abstraction has 4901 states and 5572 transitions. [2020-12-21 23:31:53,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:31:53,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4901 states and 5572 transitions. [2020-12-21 23:31:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-12-21 23:31:53,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:53,494 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:31:53,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-21 23:31:53,495 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:31:53,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:31:53,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1398352840, now seen corresponding path program 1 times [2020-12-21 23:31:53,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:31:53,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728985404] [2020-12-21 23:31:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:31:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 52 proven. 12 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-21 23:31:53,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728985404] [2020-12-21 23:31:53,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273254493] [2020-12-21 23:31:53,798 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 [2020-12-21 23:31:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 23:31:54,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:31:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 23:31:54,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:31:54,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-21 23:31:54,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048815850] [2020-12-21 23:31:54,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:31:54,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:31:54,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:31:54,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:31:54,382 INFO L87 Difference]: Start difference. First operand 4901 states and 5572 transitions. Second operand 3 states. [2020-12-21 23:31:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:31:54,884 INFO L93 Difference]: Finished difference Result 14690 states and 16701 transitions. [2020-12-21 23:31:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:31:54,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 304 [2020-12-21 23:31:54,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:31:54,933 INFO L225 Difference]: With dead ends: 14690 [2020-12-21 23:31:54,933 INFO L226 Difference]: Without dead ends: 9791 [2020-12-21 23:31:54,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:31:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9791 states. [2020-12-21 23:31:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9791 to 9789. [2020-12-21 23:31:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9789 states. [2020-12-21 23:31:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9789 states to 9789 states and 10994 transitions. [2020-12-21 23:31:55,154 INFO L78 Accepts]: Start accepts. Automaton has 9789 states and 10994 transitions. Word has length 304 [2020-12-21 23:31:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:31:55,154 INFO L481 AbstractCegarLoop]: Abstraction has 9789 states and 10994 transitions. [2020-12-21 23:31:55,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:31:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9789 states and 10994 transitions. [2020-12-21 23:31:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-12-21 23:31:55,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:55,179 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:31:55,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:31:55,393 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:31:55,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:31:55,396 INFO L82 PathProgramCache]: Analyzing trace with hash 271078757, now seen corresponding path program 1 times [2020-12-21 23:31:55,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:31:55,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103703146] [2020-12-21 23:31:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:31:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-21 23:31:55,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103703146] [2020-12-21 23:31:55,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:31:55,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:31:55,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480834463] [2020-12-21 23:31:55,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:31:55,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:31:55,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:31:55,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:31:55,735 INFO L87 Difference]: Start difference. First operand 9789 states and 10994 transitions. Second operand 3 states. [2020-12-21 23:31:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:31:57,060 INFO L93 Difference]: Finished difference Result 25478 states and 28638 transitions. [2020-12-21 23:31:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:31:57,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 310 [2020-12-21 23:31:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:31:57,108 INFO L225 Difference]: With dead ends: 25478 [2020-12-21 23:31:57,109 INFO L226 Difference]: Without dead ends: 15691 [2020-12-21 23:31:57,123 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 [2020-12-21 23:31:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15691 states. [2020-12-21 23:31:57,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15691 to 11616. [2020-12-21 23:31:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11616 states. [2020-12-21 23:31:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11616 states to 11616 states and 13099 transitions. [2020-12-21 23:31:57,330 INFO L78 Accepts]: Start accepts. Automaton has 11616 states and 13099 transitions. Word has length 310 [2020-12-21 23:31:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:31:57,330 INFO L481 AbstractCegarLoop]: Abstraction has 11616 states and 13099 transitions. [2020-12-21 23:31:57,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:31:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 11616 states and 13099 transitions. [2020-12-21 23:31:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-12-21 23:31:57,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:57,357 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:31:57,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-21 23:31:57,357 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:31:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:31:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash 952708697, now seen corresponding path program 1 times [2020-12-21 23:31:57,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:31:57,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379015131] [2020-12-21 23:31:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:31:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 23:31:57,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379015131] [2020-12-21 23:31:57,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657195770] [2020-12-21 23:31:57,619 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 [2020-12-21 23:31:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:31:57,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 23:31:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:31:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 23:31:58,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:31:58,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-21 23:31:58,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405935972] [2020-12-21 23:31:58,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:31:58,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:31:58,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:31:58,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:31:58,125 INFO L87 Difference]: Start difference. First operand 11616 states and 13099 transitions. Second operand 3 states. [2020-12-21 23:31:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:31:59,423 INFO L93 Difference]: Finished difference Result 30750 states and 34532 transitions. [2020-12-21 23:31:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:31:59,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 325 [2020-12-21 23:31:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:31:59,466 INFO L225 Difference]: With dead ends: 30750 [2020-12-21 23:31:59,466 INFO L226 Difference]: Without dead ends: 19136 [2020-12-21 23:31:59,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:31:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19136 states. [2020-12-21 23:31:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19136 to 18927. [2020-12-21 23:31:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18927 states. [2020-12-21 23:31:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18927 states to 18927 states and 20890 transitions. [2020-12-21 23:31:59,818 INFO L78 Accepts]: Start accepts. Automaton has 18927 states and 20890 transitions. Word has length 325 [2020-12-21 23:31:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:31:59,818 INFO L481 AbstractCegarLoop]: Abstraction has 18927 states and 20890 transitions. [2020-12-21 23:31:59,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:31:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 18927 states and 20890 transitions. [2020-12-21 23:31:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-21 23:31:59,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:31:59,860 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:00,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 23:32:00,075 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:00,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1370838102, now seen corresponding path program 1 times [2020-12-21 23:32:00,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:00,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604600768] [2020-12-21 23:32:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 23:32:00,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604600768] [2020-12-21 23:32:00,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:32:00,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:32:00,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553552490] [2020-12-21 23:32:00,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:32:00,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:00,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:32:00,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:32:00,509 INFO L87 Difference]: Start difference. First operand 18927 states and 20890 transitions. Second operand 3 states. [2020-12-21 23:32:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:01,735 INFO L93 Difference]: Finished difference Result 40501 states and 44690 transitions. [2020-12-21 23:32:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:32:01,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-12-21 23:32:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:01,785 INFO L225 Difference]: With dead ends: 40501 [2020-12-21 23:32:01,785 INFO L226 Difference]: Without dead ends: 21982 [2020-12-21 23:32:01,809 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 [2020-12-21 23:32:01,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21982 states. [2020-12-21 23:32:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21982 to 21978. [2020-12-21 23:32:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21978 states. [2020-12-21 23:32:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21978 states to 21978 states and 24077 transitions. [2020-12-21 23:32:02,322 INFO L78 Accepts]: Start accepts. Automaton has 21978 states and 24077 transitions. Word has length 326 [2020-12-21 23:32:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:02,323 INFO L481 AbstractCegarLoop]: Abstraction has 21978 states and 24077 transitions. [2020-12-21 23:32:02,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:32:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 21978 states and 24077 transitions. [2020-12-21 23:32:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-12-21 23:32:02,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:02,365 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:02,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-21 23:32:02,365 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:02,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1539344213, now seen corresponding path program 1 times [2020-12-21 23:32:02,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:02,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982953745] [2020-12-21 23:32:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-21 23:32:02,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982953745] [2020-12-21 23:32:02,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:32:02,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:32:02,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304051334] [2020-12-21 23:32:02,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:32:02,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:32:02,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:32:02,747 INFO L87 Difference]: Start difference. First operand 21978 states and 24077 transitions. Second operand 4 states. [2020-12-21 23:32:04,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:04,858 INFO L93 Difference]: Finished difference Result 45797 states and 50151 transitions. [2020-12-21 23:32:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:32:04,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-12-21 23:32:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:04,892 INFO L225 Difference]: With dead ends: 45797 [2020-12-21 23:32:04,893 INFO L226 Difference]: Without dead ends: 24227 [2020-12-21 23:32:04,907 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 [2020-12-21 23:32:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24227 states. [2020-12-21 23:32:05,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24227 to 23404. [2020-12-21 23:32:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23404 states. [2020-12-21 23:32:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23404 states to 23404 states and 25609 transitions. [2020-12-21 23:32:05,256 INFO L78 Accepts]: Start accepts. Automaton has 23404 states and 25609 transitions. Word has length 331 [2020-12-21 23:32:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:05,257 INFO L481 AbstractCegarLoop]: Abstraction has 23404 states and 25609 transitions. [2020-12-21 23:32:05,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:32:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 23404 states and 25609 transitions. [2020-12-21 23:32:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-12-21 23:32:05,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:05,278 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:05,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-21 23:32:05,279 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash -421616427, now seen corresponding path program 1 times [2020-12-21 23:32:05,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:05,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590101844] [2020-12-21 23:32:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:32:05,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590101844] [2020-12-21 23:32:05,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913742221] [2020-12-21 23:32:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:05,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 23:32:05,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:32:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 23:32:06,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:32:06,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-12-21 23:32:06,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627969468] [2020-12-21 23:32:06,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:32:06,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:32:06,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:32:06,257 INFO L87 Difference]: Start difference. First operand 23404 states and 25609 transitions. Second operand 3 states. [2020-12-21 23:32:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:07,540 INFO L93 Difference]: Finished difference Result 46202 states and 50568 transitions. [2020-12-21 23:32:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:32:07,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-12-21 23:32:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:07,575 INFO L225 Difference]: With dead ends: 46202 [2020-12-21 23:32:07,575 INFO L226 Difference]: Without dead ends: 23206 [2020-12-21 23:32:07,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:32:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23206 states. [2020-12-21 23:32:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23206 to 23201. [2020-12-21 23:32:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23201 states. [2020-12-21 23:32:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23201 states to 23201 states and 25075 transitions. [2020-12-21 23:32:07,947 INFO L78 Accepts]: Start accepts. Automaton has 23201 states and 25075 transitions. Word has length 333 [2020-12-21 23:32:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:07,948 INFO L481 AbstractCegarLoop]: Abstraction has 23201 states and 25075 transitions. [2020-12-21 23:32:07,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:32:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 23201 states and 25075 transitions. [2020-12-21 23:32:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-12-21 23:32:07,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:07,967 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:08,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:08,182 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1800592710, now seen corresponding path program 1 times [2020-12-21 23:32:08,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:08,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869572263] [2020-12-21 23:32:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-21 23:32:08,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869572263] [2020-12-21 23:32:08,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:32:08,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:32:08,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338103299] [2020-12-21 23:32:08,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:32:08,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:08,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:32:08,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:32:08,359 INFO L87 Difference]: Start difference. First operand 23201 states and 25075 transitions. Second operand 3 states. [2020-12-21 23:32:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:09,815 INFO L93 Difference]: Finished difference Result 55964 states and 60373 transitions. [2020-12-21 23:32:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:32:09,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-12-21 23:32:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:09,854 INFO L225 Difference]: With dead ends: 55964 [2020-12-21 23:32:09,854 INFO L226 Difference]: Without dead ends: 33171 [2020-12-21 23:32:09,876 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 [2020-12-21 23:32:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33171 states. [2020-12-21 23:32:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33171 to 33167. [2020-12-21 23:32:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33167 states. [2020-12-21 23:32:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33167 states to 33167 states and 35706 transitions. [2020-12-21 23:32:10,473 INFO L78 Accepts]: Start accepts. Automaton has 33167 states and 35706 transitions. Word has length 339 [2020-12-21 23:32:10,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:10,473 INFO L481 AbstractCegarLoop]: Abstraction has 33167 states and 35706 transitions. [2020-12-21 23:32:10,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:32:10,473 INFO L276 IsEmpty]: Start isEmpty. Operand 33167 states and 35706 transitions. [2020-12-21 23:32:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-12-21 23:32:10,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:10,510 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:10,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-21 23:32:10,511 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:10,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1111353151, now seen corresponding path program 1 times [2020-12-21 23:32:10,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:10,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260452256] [2020-12-21 23:32:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-21 23:32:10,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260452256] [2020-12-21 23:32:10,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:32:10,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:32:10,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302759745] [2020-12-21 23:32:10,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:32:10,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:32:10,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:32:10,763 INFO L87 Difference]: Start difference. First operand 33167 states and 35706 transitions. Second operand 3 states. [2020-12-21 23:32:12,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:12,245 INFO L93 Difference]: Finished difference Result 81382 states and 87761 transitions. [2020-12-21 23:32:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:32:12,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-12-21 23:32:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:12,303 INFO L225 Difference]: With dead ends: 81382 [2020-12-21 23:32:12,304 INFO L226 Difference]: Without dead ends: 48623 [2020-12-21 23:32:12,330 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 [2020-12-21 23:32:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48623 states. [2020-12-21 23:32:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48623 to 47806. [2020-12-21 23:32:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47806 states. [2020-12-21 23:32:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47806 states to 47806 states and 51559 transitions. [2020-12-21 23:32:13,220 INFO L78 Accepts]: Start accepts. Automaton has 47806 states and 51559 transitions. Word has length 341 [2020-12-21 23:32:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:13,220 INFO L481 AbstractCegarLoop]: Abstraction has 47806 states and 51559 transitions. [2020-12-21 23:32:13,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:32:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 47806 states and 51559 transitions. [2020-12-21 23:32:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2020-12-21 23:32:13,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:13,276 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2020-12-21 23:32:13,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-21 23:32:13,276 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:13,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash -220694639, now seen corresponding path program 1 times [2020-12-21 23:32:13,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:13,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496486573] [2020-12-21 23:32:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2020-12-21 23:32:14,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496486573] [2020-12-21 23:32:14,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:32:14,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:32:14,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006814041] [2020-12-21 23:32:14,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:32:14,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:14,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:32:14,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:32:14,070 INFO L87 Difference]: Start difference. First operand 47806 states and 51559 transitions. Second operand 3 states. [2020-12-21 23:32:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:15,493 INFO L93 Difference]: Finished difference Result 95813 states and 103313 transitions. [2020-12-21 23:32:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:32:15,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 415 [2020-12-21 23:32:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:15,567 INFO L225 Difference]: With dead ends: 95813 [2020-12-21 23:32:15,567 INFO L226 Difference]: Without dead ends: 48415 [2020-12-21 23:32:15,592 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 [2020-12-21 23:32:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48415 states. [2020-12-21 23:32:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48415 to 48415. [2020-12-21 23:32:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48415 states. [2020-12-21 23:32:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48415 states to 48415 states and 52195 transitions. [2020-12-21 23:32:16,330 INFO L78 Accepts]: Start accepts. Automaton has 48415 states and 52195 transitions. Word has length 415 [2020-12-21 23:32:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:16,331 INFO L481 AbstractCegarLoop]: Abstraction has 48415 states and 52195 transitions. [2020-12-21 23:32:16,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:32:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 48415 states and 52195 transitions. [2020-12-21 23:32:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-12-21 23:32:16,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:16,385 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:16,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-21 23:32:16,386 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1374268726, now seen corresponding path program 1 times [2020-12-21 23:32:16,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:16,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425601852] [2020-12-21 23:32:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 23:32:17,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425601852] [2020-12-21 23:32:17,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:32:17,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 23:32:17,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736193603] [2020-12-21 23:32:17,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:32:17,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:17,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:32:17,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:32:17,079 INFO L87 Difference]: Start difference. First operand 48415 states and 52195 transitions. Second operand 4 states. [2020-12-21 23:32:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:19,134 INFO L93 Difference]: Finished difference Result 104156 states and 112375 transitions. [2020-12-21 23:32:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:32:19,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 421 [2020-12-21 23:32:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:19,191 INFO L225 Difference]: With dead ends: 104156 [2020-12-21 23:32:19,192 INFO L226 Difference]: Without dead ends: 48435 [2020-12-21 23:32:19,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:32:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48435 states. [2020-12-21 23:32:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48435 to 39274. [2020-12-21 23:32:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39274 states. [2020-12-21 23:32:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39274 states to 39274 states and 41334 transitions. [2020-12-21 23:32:19,932 INFO L78 Accepts]: Start accepts. Automaton has 39274 states and 41334 transitions. Word has length 421 [2020-12-21 23:32:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:19,932 INFO L481 AbstractCegarLoop]: Abstraction has 39274 states and 41334 transitions. [2020-12-21 23:32:19,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:32:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 39274 states and 41334 transitions. [2020-12-21 23:32:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-12-21 23:32:19,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:19,968 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:19,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-21 23:32:19,968 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:19,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1488712927, now seen corresponding path program 1 times [2020-12-21 23:32:19,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:19,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660637834] [2020-12-21 23:32:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 147 proven. 6 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2020-12-21 23:32:20,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660637834] [2020-12-21 23:32:20,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955051000] [2020-12-21 23:32:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:20,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 23:32:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:32:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-12-21 23:32:21,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:32:21,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-21 23:32:21,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044937143] [2020-12-21 23:32:21,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:32:21,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:21,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:32:21,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:32:21,391 INFO L87 Difference]: Start difference. First operand 39274 states and 41334 transitions. Second operand 3 states. [2020-12-21 23:32:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:22,558 INFO L93 Difference]: Finished difference Result 77939 states and 82005 transitions. [2020-12-21 23:32:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:32:22,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 458 [2020-12-21 23:32:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:22,610 INFO L225 Difference]: With dead ends: 77939 [2020-12-21 23:32:22,610 INFO L226 Difference]: Without dead ends: 39479 [2020-12-21 23:32:22,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:32:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39479 states. [2020-12-21 23:32:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39479 to 32566. [2020-12-21 23:32:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32566 states. [2020-12-21 23:32:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32566 states to 32566 states and 34095 transitions. [2020-12-21 23:32:23,325 INFO L78 Accepts]: Start accepts. Automaton has 32566 states and 34095 transitions. Word has length 458 [2020-12-21 23:32:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:23,325 INFO L481 AbstractCegarLoop]: Abstraction has 32566 states and 34095 transitions. [2020-12-21 23:32:23,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:32:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 32566 states and 34095 transitions. [2020-12-21 23:32:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-12-21 23:32:23,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:23,357 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:23,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 23:32:23,565 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:23,566 INFO L82 PathProgramCache]: Analyzing trace with hash 680795419, now seen corresponding path program 1 times [2020-12-21 23:32:23,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:23,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575909580] [2020-12-21 23:32:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 449 proven. 18 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-21 23:32:24,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575909580] [2020-12-21 23:32:24,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383443943] [2020-12-21 23:32:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 23:32:24,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:32:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-21 23:32:24,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:32:24,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2020-12-21 23:32:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596246687] [2020-12-21 23:32:24,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:32:24,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:24,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:32:24,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:32:24,892 INFO L87 Difference]: Start difference. First operand 32566 states and 34095 transitions. Second operand 3 states. [2020-12-21 23:32:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:25,373 INFO L93 Difference]: Finished difference Result 92196 states and 96514 transitions. [2020-12-21 23:32:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:32:25,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-12-21 23:32:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:25,445 INFO L225 Difference]: With dead ends: 92196 [2020-12-21 23:32:25,446 INFO L226 Difference]: Without dead ends: 60444 [2020-12-21 23:32:25,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:32:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60444 states. [2020-12-21 23:32:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60444 to 57381. [2020-12-21 23:32:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57381 states. [2020-12-21 23:32:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57381 states to 57381 states and 59990 transitions. [2020-12-21 23:32:26,613 INFO L78 Accepts]: Start accepts. Automaton has 57381 states and 59990 transitions. Word has length 472 [2020-12-21 23:32:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:26,614 INFO L481 AbstractCegarLoop]: Abstraction has 57381 states and 59990 transitions. [2020-12-21 23:32:26,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:32:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 57381 states and 59990 transitions. [2020-12-21 23:32:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-12-21 23:32:26,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:26,663 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:26,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:26,864 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:26,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1531633206, now seen corresponding path program 1 times [2020-12-21 23:32:26,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:26,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815549009] [2020-12-21 23:32:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 437 proven. 124 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-21 23:32:27,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815549009] [2020-12-21 23:32:27,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418932914] [2020-12-21 23:32:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 23:32:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:32:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-21 23:32:28,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:32:28,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 23:32:28,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316917959] [2020-12-21 23:32:28,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:32:28,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:28,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:32:28,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:32:28,884 INFO L87 Difference]: Start difference. First operand 57381 states and 59990 transitions. Second operand 4 states. [2020-12-21 23:32:30,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:30,552 INFO L93 Difference]: Finished difference Result 154846 states and 161946 transitions. [2020-12-21 23:32:30,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:32:30,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 521 [2020-12-21 23:32:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:30,676 INFO L225 Difference]: With dead ends: 154846 [2020-12-21 23:32:30,676 INFO L226 Difference]: Without dead ends: 97463 [2020-12-21 23:32:30,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:32:30,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97463 states. [2020-12-21 23:32:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97463 to 92580. [2020-12-21 23:32:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92580 states. [2020-12-21 23:32:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92580 states to 92580 states and 96981 transitions. [2020-12-21 23:32:32,366 INFO L78 Accepts]: Start accepts. Automaton has 92580 states and 96981 transitions. Word has length 521 [2020-12-21 23:32:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:32,367 INFO L481 AbstractCegarLoop]: Abstraction has 92580 states and 96981 transitions. [2020-12-21 23:32:32,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:32:32,367 INFO L276 IsEmpty]: Start isEmpty. Operand 92580 states and 96981 transitions. [2020-12-21 23:32:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2020-12-21 23:32:32,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:32,779 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:32,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:32,980 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:32,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1563803765, now seen corresponding path program 1 times [2020-12-21 23:32:32,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:32,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927943708] [2020-12-21 23:32:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 549 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:32:33,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927943708] [2020-12-21 23:32:33,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720214532] [2020-12-21 23:32:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:34,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 23:32:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:32:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 678 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-21 23:32:34,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:32:34,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-12-21 23:32:34,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403824901] [2020-12-21 23:32:34,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:32:34,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:34,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:32:34,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:32:34,829 INFO L87 Difference]: Start difference. First operand 92580 states and 96981 transitions. Second operand 4 states. [2020-12-21 23:32:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:37,041 INFO L93 Difference]: Finished difference Result 253132 states and 265097 transitions. [2020-12-21 23:32:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:32:37,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 561 [2020-12-21 23:32:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:37,368 INFO L225 Difference]: With dead ends: 253132 [2020-12-21 23:32:37,368 INFO L226 Difference]: Without dead ends: 161366 [2020-12-21 23:32:37,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:32:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161366 states. [2020-12-21 23:32:39,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161366 to 161350. [2020-12-21 23:32:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161350 states. [2020-12-21 23:32:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161350 states to 161350 states and 168908 transitions. [2020-12-21 23:32:40,399 INFO L78 Accepts]: Start accepts. Automaton has 161350 states and 168908 transitions. Word has length 561 [2020-12-21 23:32:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:40,400 INFO L481 AbstractCegarLoop]: Abstraction has 161350 states and 168908 transitions. [2020-12-21 23:32:40,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:32:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 161350 states and 168908 transitions. [2020-12-21 23:32:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2020-12-21 23:32:40,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:40,509 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:40,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 23:32:40,711 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1392133176, now seen corresponding path program 1 times [2020-12-21 23:32:40,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:40,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352491999] [2020-12-21 23:32:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2020-12-21 23:32:41,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352491999] [2020-12-21 23:32:41,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:32:41,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:32:41,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401300310] [2020-12-21 23:32:41,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:32:41,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:41,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:32:41,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:32:41,953 INFO L87 Difference]: Start difference. First operand 161350 states and 168908 transitions. Second operand 3 states. [2020-12-21 23:32:43,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:43,967 INFO L93 Difference]: Finished difference Result 320487 states and 335548 transitions. [2020-12-21 23:32:43,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:32:43,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 632 [2020-12-21 23:32:43,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:44,251 INFO L225 Difference]: With dead ends: 320487 [2020-12-21 23:32:44,251 INFO L226 Difference]: Without dead ends: 159951 [2020-12-21 23:32:44,362 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 [2020-12-21 23:32:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159951 states. [2020-12-21 23:32:46,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159951 to 158303. [2020-12-21 23:32:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158303 states. [2020-12-21 23:32:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158303 states to 158303 states and 165553 transitions. [2020-12-21 23:32:47,338 INFO L78 Accepts]: Start accepts. Automaton has 158303 states and 165553 transitions. Word has length 632 [2020-12-21 23:32:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:47,339 INFO L481 AbstractCegarLoop]: Abstraction has 158303 states and 165553 transitions. [2020-12-21 23:32:47,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:32:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 158303 states and 165553 transitions. [2020-12-21 23:32:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-12-21 23:32:47,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:47,583 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:47,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-21 23:32:47,584 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2011845340, now seen corresponding path program 1 times [2020-12-21 23:32:47,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:47,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361732802] [2020-12-21 23:32:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 317 proven. 6 refuted. 0 times theorem prover too weak. 2056 trivial. 0 not checked. [2020-12-21 23:32:48,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361732802] [2020-12-21 23:32:48,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679116998] [2020-12-21 23:32:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 23:32:49,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:32:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1652 proven. 0 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2020-12-21 23:32:50,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:32:50,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-21 23:32:50,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339029085] [2020-12-21 23:32:50,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:32:50,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:32:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:32:50,093 INFO L87 Difference]: Start difference. First operand 158303 states and 165553 transitions. Second operand 3 states. [2020-12-21 23:32:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:32:51,600 INFO L93 Difference]: Finished difference Result 363634 states and 380282 transitions. [2020-12-21 23:32:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:32:51,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 848 [2020-12-21 23:32:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:32:51,922 INFO L225 Difference]: With dead ends: 363634 [2020-12-21 23:32:51,923 INFO L226 Difference]: Without dead ends: 199852 [2020-12-21 23:32:52,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 847 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:32:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199852 states. [2020-12-21 23:32:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199852 to 193558. [2020-12-21 23:32:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193558 states. [2020-12-21 23:32:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193558 states to 193558 states and 202031 transitions. [2020-12-21 23:32:55,455 INFO L78 Accepts]: Start accepts. Automaton has 193558 states and 202031 transitions. Word has length 848 [2020-12-21 23:32:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:32:55,456 INFO L481 AbstractCegarLoop]: Abstraction has 193558 states and 202031 transitions. [2020-12-21 23:32:55,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:32:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 193558 states and 202031 transitions. [2020-12-21 23:32:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2020-12-21 23:32:56,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:32:56,262 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:32:56,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:56,463 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:32:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:32:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash -839702164, now seen corresponding path program 1 times [2020-12-21 23:32:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:32:56,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332401132] [2020-12-21 23:32:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:32:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2841 backedges. 374 proven. 6 refuted. 0 times theorem prover too weak. 2461 trivial. 0 not checked. [2020-12-21 23:32:57,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332401132] [2020-12-21 23:32:57,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748147244] [2020-12-21 23:32:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:32:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:32:57,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1515 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 23:32:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:32:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2841 backedges. 1985 proven. 0 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2020-12-21 23:32:58,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:32:58,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-21 23:32:58,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519189245] [2020-12-21 23:32:58,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:32:58,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:32:58,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:32:58,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:32:58,963 INFO L87 Difference]: Start difference. First operand 193558 states and 202031 transitions. Second operand 3 states. [2020-12-21 23:33:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:33:00,495 INFO L93 Difference]: Finished difference Result 392392 states and 409360 transitions. [2020-12-21 23:33:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:33:00,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 893 [2020-12-21 23:33:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:33:00,821 INFO L225 Difference]: With dead ends: 392392 [2020-12-21 23:33:00,821 INFO L226 Difference]: Without dead ends: 198430 [2020-12-21 23:33:00,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 892 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:33:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198430 states. [2020-12-21 23:33:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198430 to 191524. [2020-12-21 23:33:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191524 states. [2020-12-21 23:33:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191524 states to 191524 states and 198898 transitions. [2020-12-21 23:33:04,324 INFO L78 Accepts]: Start accepts. Automaton has 191524 states and 198898 transitions. Word has length 893 [2020-12-21 23:33:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:33:04,324 INFO L481 AbstractCegarLoop]: Abstraction has 191524 states and 198898 transitions. [2020-12-21 23:33:04,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:33:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 191524 states and 198898 transitions. [2020-12-21 23:33:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2020-12-21 23:33:05,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:33:05,157 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:33:05,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:33:05,358 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:33:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:33:05,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1252291571, now seen corresponding path program 1 times [2020-12-21 23:33:05,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:33:05,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803284014] [2020-12-21 23:33:05,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:33:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:33:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 399 proven. 6 refuted. 0 times theorem prover too weak. 2881 trivial. 0 not checked. [2020-12-21 23:33:06,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803284014] [2020-12-21 23:33:06,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768123874] [2020-12-21 23:33:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:33:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:33:07,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 23:33:07,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:33:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 1937 proven. 0 refuted. 0 times theorem prover too weak. 1349 trivial. 0 not checked. [2020-12-21 23:33:08,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:33:08,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-21 23:33:08,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695953151] [2020-12-21 23:33:08,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:33:08,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:33:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:33:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:33:08,388 INFO L87 Difference]: Start difference. First operand 191524 states and 198898 transitions. Second operand 3 states. [2020-12-21 23:33:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:33:10,606 INFO L93 Difference]: Finished difference Result 380636 states and 395241 transitions. [2020-12-21 23:33:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:33:10,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 946 [2020-12-21 23:33:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:33:10,937 INFO L225 Difference]: With dead ends: 380636 [2020-12-21 23:33:10,938 INFO L226 Difference]: Without dead ends: 189520 [2020-12-21 23:33:11,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:33:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189520 states. [2020-12-21 23:33:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189520 to 188471. [2020-12-21 23:33:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188471 states. [2020-12-21 23:33:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188471 states to 188471 states and 195411 transitions. [2020-12-21 23:33:14,457 INFO L78 Accepts]: Start accepts. Automaton has 188471 states and 195411 transitions. Word has length 946 [2020-12-21 23:33:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:33:14,458 INFO L481 AbstractCegarLoop]: Abstraction has 188471 states and 195411 transitions. [2020-12-21 23:33:14,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:33:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 188471 states and 195411 transitions. [2020-12-21 23:33:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2020-12-21 23:33:14,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:33:14,682 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 3, 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] [2020-12-21 23:33:14,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 23:33:14,884 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:33:14,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:33:14,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1019461412, now seen corresponding path program 1 times [2020-12-21 23:33:14,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:33:14,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106324048] [2020-12-21 23:33:14,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:33:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:33:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3349 backedges. 408 proven. 6 refuted. 0 times theorem prover too weak. 2935 trivial. 0 not checked. [2020-12-21 23:33:16,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106324048] [2020-12-21 23:33:16,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799564228] [2020-12-21 23:33:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:33:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:33:16,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 23:33:16,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:33:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3349 backedges. 1871 proven. 0 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2020-12-21 23:33:17,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:33:17,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-21 23:33:17,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690148602] [2020-12-21 23:33:17,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:33:17,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:33:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:33:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:33:17,685 INFO L87 Difference]: Start difference. First operand 188471 states and 195411 transitions. Second operand 3 states. [2020-12-21 23:33:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:33:19,656 INFO L93 Difference]: Finished difference Result 411907 states and 427629 transitions. [2020-12-21 23:33:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:33:19,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 946 [2020-12-21 23:33:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:33:20,407 INFO L225 Difference]: With dead ends: 411907 [2020-12-21 23:33:20,408 INFO L226 Difference]: Without dead ends: 223844 [2020-12-21 23:33:20,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:33:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223844 states. [2020-12-21 23:33:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223844 to 206757. [2020-12-21 23:33:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206757 states. [2020-12-21 23:33:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206757 states to 206757 states and 214657 transitions. [2020-12-21 23:33:24,103 INFO L78 Accepts]: Start accepts. Automaton has 206757 states and 214657 transitions. Word has length 946 [2020-12-21 23:33:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:33:24,104 INFO L481 AbstractCegarLoop]: Abstraction has 206757 states and 214657 transitions. [2020-12-21 23:33:24,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:33:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 206757 states and 214657 transitions. [2020-12-21 23:33:24,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2020-12-21 23:33:24,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:33:24,299 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 3, 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] [2020-12-21 23:33:24,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 23:33:24,505 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:33:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:33:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1118386881, now seen corresponding path program 2 times [2020-12-21 23:33:24,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:33:24,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707794713] [2020-12-21 23:33:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:33:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:33:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3547 backedges. 429 proven. 6 refuted. 0 times theorem prover too weak. 3112 trivial. 0 not checked. [2020-12-21 23:33:25,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707794713] [2020-12-21 23:33:25,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941889354] [2020-12-21 23:33:25,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:33:26,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:33:26,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:33:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 23:33:26,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:33:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3547 backedges. 1967 proven. 450 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2020-12-21 23:33:27,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:33:27,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2020-12-21 23:33:27,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24048547] [2020-12-21 23:33:27,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:33:27,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:33:27,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:33:27,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:33:27,825 INFO L87 Difference]: Start difference. First operand 206757 states and 214657 transitions. Second operand 6 states. [2020-12-21 23:33:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:33:34,710 INFO L93 Difference]: Finished difference Result 504514 states and 524014 transitions. [2020-12-21 23:33:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 23:33:34,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 961 [2020-12-21 23:33:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:33:35,327 INFO L225 Difference]: With dead ends: 504514 [2020-12-21 23:33:35,327 INFO L226 Difference]: Without dead ends: 295323 [2020-12-21 23:33:36,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-21 23:33:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295323 states. [2020-12-21 23:33:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295323 to 173160. [2020-12-21 23:33:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173160 states. [2020-12-21 23:33:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173160 states to 173160 states and 179649 transitions. [2020-12-21 23:33:40,972 INFO L78 Accepts]: Start accepts. Automaton has 173160 states and 179649 transitions. Word has length 961 [2020-12-21 23:33:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:33:40,972 INFO L481 AbstractCegarLoop]: Abstraction has 173160 states and 179649 transitions. [2020-12-21 23:33:40,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:33:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 173160 states and 179649 transitions. [2020-12-21 23:33:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1179 [2020-12-21 23:33:41,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:33:41,299 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-21 23:33:41,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 23:33:41,501 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:33:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:33:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1826023970, now seen corresponding path program 1 times [2020-12-21 23:33:41,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:33:41,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293660841] [2020-12-21 23:33:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:33:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:33:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5102 backedges. 2150 proven. 202 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2020-12-21 23:33:44,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293660841] [2020-12-21 23:33:44,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406207623] [2020-12-21 23:33:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:33:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:33:44,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1883 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 23:33:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:33:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5102 backedges. 2780 proven. 0 refuted. 0 times theorem prover too weak. 2322 trivial. 0 not checked. [2020-12-21 23:33:46,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:33:46,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2020-12-21 23:33:46,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138707080] [2020-12-21 23:33:46,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:33:46,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:33:46,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:33:46,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:33:46,270 INFO L87 Difference]: Start difference. First operand 173160 states and 179649 transitions. Second operand 4 states. [2020-12-21 23:33:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:33:49,202 INFO L93 Difference]: Finished difference Result 348570 states and 361560 transitions. [2020-12-21 23:33:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 23:33:49,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1178 [2020-12-21 23:33:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:33:49,471 INFO L225 Difference]: With dead ends: 348570 [2020-12-21 23:33:49,472 INFO L226 Difference]: Without dead ends: 175200 [2020-12-21 23:33:49,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1177 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:33:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175200 states. [2020-12-21 23:33:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175200 to 168886. [2020-12-21 23:33:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168886 states. [2020-12-21 23:33:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168886 states to 168886 states and 175083 transitions. [2020-12-21 23:33:52,790 INFO L78 Accepts]: Start accepts. Automaton has 168886 states and 175083 transitions. Word has length 1178 [2020-12-21 23:33:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:33:52,791 INFO L481 AbstractCegarLoop]: Abstraction has 168886 states and 175083 transitions. [2020-12-21 23:33:52,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:33:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand 168886 states and 175083 transitions. [2020-12-21 23:33:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1215 [2020-12-21 23:33:52,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:33:52,956 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-21 23:33:53,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:33:53,158 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:33:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:33:53,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1644564043, now seen corresponding path program 1 times [2020-12-21 23:33:53,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:33:53,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351414841] [2020-12-21 23:33:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:33:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:33:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5455 backedges. 2263 proven. 202 refuted. 0 times theorem prover too weak. 2990 trivial. 0 not checked. [2020-12-21 23:33:56,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351414841] [2020-12-21 23:33:56,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53515315] [2020-12-21 23:33:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:33:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:33:57,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1954 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 23:33:57,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:33:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5455 backedges. 3800 proven. 0 refuted. 0 times theorem prover too weak. 1655 trivial. 0 not checked. [2020-12-21 23:33:58,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:33:58,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-21 23:33:58,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529439042] [2020-12-21 23:33:58,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:33:58,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:33:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:33:58,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:33:58,952 INFO L87 Difference]: Start difference. First operand 168886 states and 175083 transitions. Second operand 3 states. [2020-12-21 23:34:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:34:00,075 INFO L93 Difference]: Finished difference Result 328401 states and 340475 transitions. [2020-12-21 23:34:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:34:00,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1214 [2020-12-21 23:34:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:34:00,288 INFO L225 Difference]: With dead ends: 328401 [2020-12-21 23:34:00,289 INFO L226 Difference]: Without dead ends: 159110 [2020-12-21 23:34:00,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1216 GetRequests, 1213 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:34:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159110 states. [2020-12-21 23:34:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159110 to 157687. [2020-12-21 23:34:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157687 states. [2020-12-21 23:34:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157687 states to 157687 states and 163134 transitions. [2020-12-21 23:34:03,442 INFO L78 Accepts]: Start accepts. Automaton has 157687 states and 163134 transitions. Word has length 1214 [2020-12-21 23:34:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:34:03,443 INFO L481 AbstractCegarLoop]: Abstraction has 157687 states and 163134 transitions. [2020-12-21 23:34:03,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:34:03,443 INFO L276 IsEmpty]: Start isEmpty. Operand 157687 states and 163134 transitions. [2020-12-21 23:34:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1290 [2020-12-21 23:34:03,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:34:03,665 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-21 23:34:03,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 23:34:03,867 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:34:03,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:34:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2036398774, now seen corresponding path program 1 times [2020-12-21 23:34:03,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:34:03,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761164444] [2020-12-21 23:34:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:34:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:34:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6187 backedges. 2488 proven. 202 refuted. 0 times theorem prover too weak. 3497 trivial. 0 not checked. [2020-12-21 23:34:06,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761164444] [2020-12-21 23:34:06,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752571100] [2020-12-21 23:34:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:34:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:34:06,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 23:34:06,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:34:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6187 backedges. 4981 proven. 84 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-12-21 23:34:10,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:34:10,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2020-12-21 23:34:10,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925930399] [2020-12-21 23:34:10,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 23:34:10,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:34:10,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 23:34:10,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:34:10,430 INFO L87 Difference]: Start difference. First operand 157687 states and 163134 transitions. Second operand 7 states. [2020-12-21 23:34:20,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:34:20,844 INFO L93 Difference]: Finished difference Result 704932 states and 730793 transitions. [2020-12-21 23:34:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 23:34:20,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1289 [2020-12-21 23:34:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:34:22,467 INFO L225 Difference]: With dead ends: 704932 [2020-12-21 23:34:22,467 INFO L226 Difference]: Without dead ends: 547239 [2020-12-21 23:34:22,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1297 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-12-21 23:34:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547239 states. [2020-12-21 23:34:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547239 to 483932. [2020-12-21 23:34:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483932 states. [2020-12-21 23:34:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483932 states to 483932 states and 501267 transitions. [2020-12-21 23:34:33,147 INFO L78 Accepts]: Start accepts. Automaton has 483932 states and 501267 transitions. Word has length 1289 [2020-12-21 23:34:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:34:33,148 INFO L481 AbstractCegarLoop]: Abstraction has 483932 states and 501267 transitions. [2020-12-21 23:34:33,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 23:34:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 483932 states and 501267 transitions. [2020-12-21 23:34:34,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1543 [2020-12-21 23:34:34,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:34:34,337 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:34:34,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:34:34,538 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:34:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:34:34,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2088898873, now seen corresponding path program 1 times [2020-12-21 23:34:34,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:34:34,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915639430] [2020-12-21 23:34:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:34:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:34:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10170 backedges. 643 proven. 6 refuted. 0 times theorem prover too weak. 9521 trivial. 0 not checked. [2020-12-21 23:34:36,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915639430] [2020-12-21 23:34:36,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815056113] [2020-12-21 23:34:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:34:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:34:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 2530 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 23:34:37,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:34:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10170 backedges. 4137 proven. 0 refuted. 0 times theorem prover too weak. 6033 trivial. 0 not checked. [2020-12-21 23:34:39,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:34:39,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-21 23:34:39,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977943820] [2020-12-21 23:34:39,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:34:39,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:34:39,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:34:39,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:34:39,438 INFO L87 Difference]: Start difference. First operand 483932 states and 501267 transitions. Second operand 3 states. [2020-12-21 23:34:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:34:44,616 INFO L93 Difference]: Finished difference Result 1113679 states and 1154277 transitions. [2020-12-21 23:34:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:34:44,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1542 [2020-12-21 23:34:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:34:46,314 INFO L225 Difference]: With dead ends: 1113679 [2020-12-21 23:34:46,316 INFO L226 Difference]: Without dead ends: 625283 [2020-12-21 23:34:47,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1544 GetRequests, 1541 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:34:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625283 states.