/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/systemc/token_ring.04.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:08:21,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:08:21,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:08:21,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:08:21,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:08:21,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:08:21,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:08:21,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:08:22,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:08:22,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:08:22,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:08:22,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:08:22,011 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:08:22,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:08:22,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:08:22,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:08:22,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:08:22,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:08:22,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:08:22,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:08:22,015 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:08:22,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:08:22,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:08:22,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:08:22,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:08:22,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:08:22,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:08:22,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:08:22,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:08:22,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:08:22,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:08:22,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:08:22,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:08:22,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:08:22,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:08:22,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:08:22,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:08:22,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:08:22,557 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:08:22,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2020-12-22 07:08:22,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467abc4dc/3bb1df9c9f334fca87cb73c0cf30dde4/FLAGace308d57 [2020-12-22 07:08:23,469 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:08:23,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2020-12-22 07:08:23,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467abc4dc/3bb1df9c9f334fca87cb73c0cf30dde4/FLAGace308d57 [2020-12-22 07:08:23,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467abc4dc/3bb1df9c9f334fca87cb73c0cf30dde4 [2020-12-22 07:08:23,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:08:23,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:08:23,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:08:23,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:08:23,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:08:23,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:08:23" (1/1) ... [2020-12-22 07:08:23,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a558ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:23, skipping insertion in model container [2020-12-22 07:08:23,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:08:23" (1/1) ... [2020-12-22 07:08:23,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:08:23,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:08:23,964 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/systemc/token_ring.04.cil-2.c[366,379] [2020-12-22 07:08:24,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:08:24,105 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:08:24,121 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/systemc/token_ring.04.cil-2.c[366,379] [2020-12-22 07:08:24,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:08:24,233 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:08:24,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24 WrapperNode [2020-12-22 07:08:24,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:08:24,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:08:24,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:08:24,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:08:24,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:08:24,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:08:24,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:08:24,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:08:24,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... [2020-12-22 07:08:24,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:08:24,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:08:24,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:08:24,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:08:24,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:08:24,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:08:24,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:08:24,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:08:24,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:08:26,059 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:08:26,060 INFO L299 CfgBuilder]: Removed 163 assume(true) statements. [2020-12-22 07:08:26,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:08:26 BoogieIcfgContainer [2020-12-22 07:08:26,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:08:26,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:08:26,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:08:26,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:08:26,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:08:23" (1/3) ... [2020-12-22 07:08:26,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffc5c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:08:26, skipping insertion in model container [2020-12-22 07:08:26,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:08:24" (2/3) ... [2020-12-22 07:08:26,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffc5c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:08:26, skipping insertion in model container [2020-12-22 07:08:26,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:08:26" (3/3) ... [2020-12-22 07:08:26,080 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2020-12-22 07:08:26,087 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:08:26,093 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 07:08:26,113 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 07:08:26,152 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:08:26,152 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:08:26,153 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:08:26,153 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:08:26,153 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:08:26,153 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:08:26,153 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:08:26,153 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:08:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states. [2020-12-22 07:08:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:26,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:26,190 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] [2020-12-22 07:08:26,190 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:26,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:26,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1090379614, now seen corresponding path program 1 times [2020-12-22 07:08:26,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:26,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400368643] [2020-12-22 07:08:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:26,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400368643] [2020-12-22 07:08:26,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:26,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:26,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152797903] [2020-12-22 07:08:26,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:26,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:26,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:26,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:26,493 INFO L87 Difference]: Start difference. First operand 421 states. Second operand 3 states. [2020-12-22 07:08:26,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:26,657 INFO L93 Difference]: Finished difference Result 837 states and 1301 transitions. [2020-12-22 07:08:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:26,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:08:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:26,678 INFO L225 Difference]: With dead ends: 837 [2020-12-22 07:08:26,678 INFO L226 Difference]: Without dead ends: 417 [2020-12-22 07:08:26,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-12-22 07:08:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2020-12-22 07:08:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-22 07:08:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 633 transitions. [2020-12-22 07:08:26,776 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 633 transitions. Word has length 72 [2020-12-22 07:08:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:26,777 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 633 transitions. [2020-12-22 07:08:26,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 633 transitions. [2020-12-22 07:08:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:26,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:26,781 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] [2020-12-22 07:08:26,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:08:26,782 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash 136439456, now seen corresponding path program 1 times [2020-12-22 07:08:26,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:26,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833874343] [2020-12-22 07:08:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:26,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833874343] [2020-12-22 07:08:26,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:26,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:26,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652286315] [2020-12-22 07:08:26,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:26,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:26,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:26,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:26,911 INFO L87 Difference]: Start difference. First operand 417 states and 633 transitions. Second operand 3 states. [2020-12-22 07:08:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:27,009 INFO L93 Difference]: Finished difference Result 1143 states and 1731 transitions. [2020-12-22 07:08:27,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:27,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:08:27,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:27,016 INFO L225 Difference]: With dead ends: 1143 [2020-12-22 07:08:27,017 INFO L226 Difference]: Without dead ends: 735 [2020-12-22 07:08:27,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2020-12-22 07:08:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 731. [2020-12-22 07:08:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:08:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1106 transitions. [2020-12-22 07:08:27,107 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1106 transitions. Word has length 72 [2020-12-22 07:08:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:27,108 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1106 transitions. [2020-12-22 07:08:27,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1106 transitions. [2020-12-22 07:08:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:27,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:27,122 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] [2020-12-22 07:08:27,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:08:27,122 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:27,123 INFO L82 PathProgramCache]: Analyzing trace with hash -51966948, now seen corresponding path program 1 times [2020-12-22 07:08:27,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:27,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920355145] [2020-12-22 07:08:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:27,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920355145] [2020-12-22 07:08:27,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:27,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:27,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15861736] [2020-12-22 07:08:27,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:27,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:27,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:27,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:27,309 INFO L87 Difference]: Start difference. First operand 731 states and 1106 transitions. Second operand 4 states. [2020-12-22 07:08:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:27,450 INFO L93 Difference]: Finished difference Result 1769 states and 2672 transitions. [2020-12-22 07:08:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:27,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:08:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:27,459 INFO L225 Difference]: With dead ends: 1769 [2020-12-22 07:08:27,460 INFO L226 Difference]: Without dead ends: 1048 [2020-12-22 07:08:27,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2020-12-22 07:08:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 731. [2020-12-22 07:08:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:08:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1103 transitions. [2020-12-22 07:08:27,526 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1103 transitions. Word has length 72 [2020-12-22 07:08:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:27,534 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1103 transitions. [2020-12-22 07:08:27,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1103 transitions. [2020-12-22 07:08:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:27,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:27,538 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] [2020-12-22 07:08:27,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:08:27,539 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:27,539 INFO L82 PathProgramCache]: Analyzing trace with hash -469363554, now seen corresponding path program 1 times [2020-12-22 07:08:27,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:27,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772447733] [2020-12-22 07:08:27,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:27,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772447733] [2020-12-22 07:08:27,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:27,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:27,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121190860] [2020-12-22 07:08:27,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:27,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:27,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:27,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:27,667 INFO L87 Difference]: Start difference. First operand 731 states and 1103 transitions. Second operand 4 states. [2020-12-22 07:08:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:27,791 INFO L93 Difference]: Finished difference Result 1767 states and 2662 transitions. [2020-12-22 07:08:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:27,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:08:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:27,799 INFO L225 Difference]: With dead ends: 1767 [2020-12-22 07:08:27,799 INFO L226 Difference]: Without dead ends: 1047 [2020-12-22 07:08:27,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:27,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2020-12-22 07:08:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 731. [2020-12-22 07:08:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:08:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1100 transitions. [2020-12-22 07:08:27,849 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1100 transitions. Word has length 72 [2020-12-22 07:08:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:27,849 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1100 transitions. [2020-12-22 07:08:27,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1100 transitions. [2020-12-22 07:08:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:27,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:27,851 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] [2020-12-22 07:08:27,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:08:27,851 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:27,852 INFO L82 PathProgramCache]: Analyzing trace with hash 209908700, now seen corresponding path program 1 times [2020-12-22 07:08:27,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:27,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134880516] [2020-12-22 07:08:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:27,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134880516] [2020-12-22 07:08:27,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:27,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:27,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380152426] [2020-12-22 07:08:27,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:27,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:27,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:27,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:27,917 INFO L87 Difference]: Start difference. First operand 731 states and 1100 transitions. Second operand 3 states. [2020-12-22 07:08:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:27,989 INFO L93 Difference]: Finished difference Result 1450 states and 2183 transitions. [2020-12-22 07:08:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:27,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:08:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:27,994 INFO L225 Difference]: With dead ends: 1450 [2020-12-22 07:08:27,994 INFO L226 Difference]: Without dead ends: 731 [2020-12-22 07:08:27,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:27,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-22 07:08:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2020-12-22 07:08:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:08:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1092 transitions. [2020-12-22 07:08:28,043 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1092 transitions. Word has length 72 [2020-12-22 07:08:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:28,043 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1092 transitions. [2020-12-22 07:08:28,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1092 transitions. [2020-12-22 07:08:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:28,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:28,045 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] [2020-12-22 07:08:28,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:08:28,045 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1700782112, now seen corresponding path program 1 times [2020-12-22 07:08:28,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:28,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545310321] [2020-12-22 07:08:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:28,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545310321] [2020-12-22 07:08:28,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:28,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:28,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110231238] [2020-12-22 07:08:28,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:28,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:28,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:28,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:28,172 INFO L87 Difference]: Start difference. First operand 731 states and 1092 transitions. Second operand 3 states. [2020-12-22 07:08:28,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:28,261 INFO L93 Difference]: Finished difference Result 1448 states and 2164 transitions. [2020-12-22 07:08:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:28,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:08:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:28,266 INFO L225 Difference]: With dead ends: 1448 [2020-12-22 07:08:28,266 INFO L226 Difference]: Without dead ends: 731 [2020-12-22 07:08:28,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-22 07:08:28,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2020-12-22 07:08:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:08:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1072 transitions. [2020-12-22 07:08:28,315 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1072 transitions. Word has length 72 [2020-12-22 07:08:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:28,315 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1072 transitions. [2020-12-22 07:08:28,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1072 transitions. [2020-12-22 07:08:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:28,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:28,322 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] [2020-12-22 07:08:28,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:08:28,323 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:28,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1192162725, now seen corresponding path program 1 times [2020-12-22 07:08:28,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:28,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609039858] [2020-12-22 07:08:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:28,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609039858] [2020-12-22 07:08:28,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:28,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:28,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275599046] [2020-12-22 07:08:28,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:28,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:28,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:28,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:28,428 INFO L87 Difference]: Start difference. First operand 731 states and 1072 transitions. Second operand 4 states. [2020-12-22 07:08:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:28,594 INFO L93 Difference]: Finished difference Result 1724 states and 2528 transitions. [2020-12-22 07:08:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:28,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:08:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:28,601 INFO L225 Difference]: With dead ends: 1724 [2020-12-22 07:08:28,601 INFO L226 Difference]: Without dead ends: 1008 [2020-12-22 07:08:28,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-12-22 07:08:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 731. [2020-12-22 07:08:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:08:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1069 transitions. [2020-12-22 07:08:28,658 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1069 transitions. Word has length 72 [2020-12-22 07:08:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:28,659 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1069 transitions. [2020-12-22 07:08:28,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1069 transitions. [2020-12-22 07:08:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:28,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:28,660 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] [2020-12-22 07:08:28,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:08:28,660 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1625891811, now seen corresponding path program 1 times [2020-12-22 07:08:28,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:28,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923818120] [2020-12-22 07:08:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:28,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923818120] [2020-12-22 07:08:28,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:28,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:28,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697320479] [2020-12-22 07:08:28,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:28,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:28,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:28,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:28,728 INFO L87 Difference]: Start difference. First operand 731 states and 1069 transitions. Second operand 3 states. [2020-12-22 07:08:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:28,820 INFO L93 Difference]: Finished difference Result 1446 states and 2116 transitions. [2020-12-22 07:08:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:28,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:08:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:28,825 INFO L225 Difference]: With dead ends: 1446 [2020-12-22 07:08:28,825 INFO L226 Difference]: Without dead ends: 731 [2020-12-22 07:08:28,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-22 07:08:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2020-12-22 07:08:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:08:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1049 transitions. [2020-12-22 07:08:28,892 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1049 transitions. Word has length 72 [2020-12-22 07:08:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:28,893 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1049 transitions. [2020-12-22 07:08:28,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1049 transitions. [2020-12-22 07:08:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:28,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:28,894 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] [2020-12-22 07:08:28,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:08:28,894 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:28,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:28,895 INFO L82 PathProgramCache]: Analyzing trace with hash 813286440, now seen corresponding path program 1 times [2020-12-22 07:08:28,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:28,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808551426] [2020-12-22 07:08:28,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:28,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808551426] [2020-12-22 07:08:28,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:28,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:28,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259590798] [2020-12-22 07:08:28,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:28,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:28,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:28,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:28,964 INFO L87 Difference]: Start difference. First operand 731 states and 1049 transitions. Second operand 3 states. [2020-12-22 07:08:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:29,052 INFO L93 Difference]: Finished difference Result 1445 states and 2075 transitions. [2020-12-22 07:08:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:29,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:08:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:29,057 INFO L225 Difference]: With dead ends: 1445 [2020-12-22 07:08:29,057 INFO L226 Difference]: Without dead ends: 731 [2020-12-22 07:08:29,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-22 07:08:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2020-12-22 07:08:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:08:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1029 transitions. [2020-12-22 07:08:29,113 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1029 transitions. Word has length 72 [2020-12-22 07:08:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:29,114 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1029 transitions. [2020-12-22 07:08:29,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1029 transitions. [2020-12-22 07:08:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:29,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:29,115 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] [2020-12-22 07:08:29,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:08:29,115 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash -167107164, now seen corresponding path program 1 times [2020-12-22 07:08:29,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:29,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052511540] [2020-12-22 07:08:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:29,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052511540] [2020-12-22 07:08:29,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:29,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:29,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572953151] [2020-12-22 07:08:29,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:29,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:29,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:29,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:29,163 INFO L87 Difference]: Start difference. First operand 731 states and 1029 transitions. Second operand 4 states. [2020-12-22 07:08:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:29,339 INFO L93 Difference]: Finished difference Result 1718 states and 2420 transitions. [2020-12-22 07:08:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:29,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:08:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:29,347 INFO L225 Difference]: With dead ends: 1718 [2020-12-22 07:08:29,347 INFO L226 Difference]: Without dead ends: 1005 [2020-12-22 07:08:29,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2020-12-22 07:08:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 731. [2020-12-22 07:08:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 07:08:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1026 transitions. [2020-12-22 07:08:29,411 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1026 transitions. Word has length 72 [2020-12-22 07:08:29,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:29,412 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1026 transitions. [2020-12-22 07:08:29,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1026 transitions. [2020-12-22 07:08:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:29,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:29,413 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] [2020-12-22 07:08:29,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:08:29,413 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1219678246, now seen corresponding path program 1 times [2020-12-22 07:08:29,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:29,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344687662] [2020-12-22 07:08:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:29,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344687662] [2020-12-22 07:08:29,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:29,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:29,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722067915] [2020-12-22 07:08:29,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:29,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:29,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:29,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:29,486 INFO L87 Difference]: Start difference. First operand 731 states and 1026 transitions. Second operand 5 states. [2020-12-22 07:08:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:29,700 INFO L93 Difference]: Finished difference Result 1819 states and 2574 transitions. [2020-12-22 07:08:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:29,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:08:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:29,708 INFO L225 Difference]: With dead ends: 1819 [2020-12-22 07:08:29,708 INFO L226 Difference]: Without dead ends: 1113 [2020-12-22 07:08:29,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:29,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2020-12-22 07:08:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 737. [2020-12-22 07:08:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2020-12-22 07:08:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1020 transitions. [2020-12-22 07:08:29,790 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1020 transitions. Word has length 72 [2020-12-22 07:08:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:29,790 INFO L481 AbstractCegarLoop]: Abstraction has 737 states and 1020 transitions. [2020-12-22 07:08:29,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1020 transitions. [2020-12-22 07:08:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:29,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:29,792 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] [2020-12-22 07:08:29,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:08:29,792 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:29,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1204159528, now seen corresponding path program 1 times [2020-12-22 07:08:29,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:29,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987771461] [2020-12-22 07:08:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:29,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987771461] [2020-12-22 07:08:29,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:29,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:29,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397571939] [2020-12-22 07:08:29,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:29,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:29,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:29,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:29,853 INFO L87 Difference]: Start difference. First operand 737 states and 1020 transitions. Second operand 5 states. [2020-12-22 07:08:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:30,166 INFO L93 Difference]: Finished difference Result 2641 states and 3665 transitions. [2020-12-22 07:08:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:30,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:08:30,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:30,178 INFO L225 Difference]: With dead ends: 2641 [2020-12-22 07:08:30,179 INFO L226 Difference]: Without dead ends: 1936 [2020-12-22 07:08:30,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:30,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-12-22 07:08:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 779. [2020-12-22 07:08:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-12-22 07:08:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1062 transitions. [2020-12-22 07:08:30,284 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1062 transitions. Word has length 72 [2020-12-22 07:08:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:30,285 INFO L481 AbstractCegarLoop]: Abstraction has 779 states and 1062 transitions. [2020-12-22 07:08:30,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:30,285 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1062 transitions. [2020-12-22 07:08:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:30,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:30,286 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] [2020-12-22 07:08:30,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:08:30,286 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:30,287 INFO L82 PathProgramCache]: Analyzing trace with hash 306766250, now seen corresponding path program 1 times [2020-12-22 07:08:30,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:30,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055831460] [2020-12-22 07:08:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:30,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055831460] [2020-12-22 07:08:30,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:30,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:30,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707839260] [2020-12-22 07:08:30,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:30,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:30,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:30,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:30,335 INFO L87 Difference]: Start difference. First operand 779 states and 1062 transitions. Second operand 5 states. [2020-12-22 07:08:30,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:30,562 INFO L93 Difference]: Finished difference Result 2052 states and 2811 transitions. [2020-12-22 07:08:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:30,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:08:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:30,569 INFO L225 Difference]: With dead ends: 2052 [2020-12-22 07:08:30,569 INFO L226 Difference]: Without dead ends: 1315 [2020-12-22 07:08:30,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2020-12-22 07:08:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 785. [2020-12-22 07:08:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785 states. [2020-12-22 07:08:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1056 transitions. [2020-12-22 07:08:30,672 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1056 transitions. Word has length 72 [2020-12-22 07:08:30,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:30,672 INFO L481 AbstractCegarLoop]: Abstraction has 785 states and 1056 transitions. [2020-12-22 07:08:30,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:30,672 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1056 transitions. [2020-12-22 07:08:30,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:30,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:30,673 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] [2020-12-22 07:08:30,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:08:30,674 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:30,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:30,674 INFO L82 PathProgramCache]: Analyzing trace with hash 966297772, now seen corresponding path program 1 times [2020-12-22 07:08:30,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:30,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370567285] [2020-12-22 07:08:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:30,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370567285] [2020-12-22 07:08:30,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:30,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:30,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529632548] [2020-12-22 07:08:30,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:30,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:30,732 INFO L87 Difference]: Start difference. First operand 785 states and 1056 transitions. Second operand 5 states. [2020-12-22 07:08:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:30,980 INFO L93 Difference]: Finished difference Result 2119 states and 2861 transitions. [2020-12-22 07:08:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:30,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:08:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:30,988 INFO L225 Difference]: With dead ends: 2119 [2020-12-22 07:08:30,988 INFO L226 Difference]: Without dead ends: 1383 [2020-12-22 07:08:30,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2020-12-22 07:08:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 791. [2020-12-22 07:08:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791 states. [2020-12-22 07:08:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1050 transitions. [2020-12-22 07:08:31,088 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1050 transitions. Word has length 72 [2020-12-22 07:08:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:31,089 INFO L481 AbstractCegarLoop]: Abstraction has 791 states and 1050 transitions. [2020-12-22 07:08:31,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1050 transitions. [2020-12-22 07:08:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:08:31,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:31,091 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] [2020-12-22 07:08:31,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:08:31,091 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:31,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1667897646, now seen corresponding path program 1 times [2020-12-22 07:08:31,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:31,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164392753] [2020-12-22 07:08:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:31,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164392753] [2020-12-22 07:08:31,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:31,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:31,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356343151] [2020-12-22 07:08:31,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:31,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:31,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:31,157 INFO L87 Difference]: Start difference. First operand 791 states and 1050 transitions. Second operand 4 states. [2020-12-22 07:08:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:31,528 INFO L93 Difference]: Finished difference Result 2803 states and 3720 transitions. [2020-12-22 07:08:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:31,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:08:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:31,539 INFO L225 Difference]: With dead ends: 2803 [2020-12-22 07:08:31,539 INFO L226 Difference]: Without dead ends: 2032 [2020-12-22 07:08:31,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2020-12-22 07:08:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1936. [2020-12-22 07:08:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2020-12-22 07:08:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2545 transitions. [2020-12-22 07:08:31,732 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2545 transitions. Word has length 72 [2020-12-22 07:08:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:31,732 INFO L481 AbstractCegarLoop]: Abstraction has 1936 states and 2545 transitions. [2020-12-22 07:08:31,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2545 transitions. [2020-12-22 07:08:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 07:08:31,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:31,734 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] [2020-12-22 07:08:31,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:08:31,734 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:31,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:31,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1599707443, now seen corresponding path program 1 times [2020-12-22 07:08:31,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:31,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909676131] [2020-12-22 07:08:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:08:31,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909676131] [2020-12-22 07:08:31,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:31,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:08:31,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836759062] [2020-12-22 07:08:31,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:08:31,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:31,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:08:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:31,796 INFO L87 Difference]: Start difference. First operand 1936 states and 2545 transitions. Second operand 5 states. [2020-12-22 07:08:32,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:32,253 INFO L93 Difference]: Finished difference Result 4730 states and 6262 transitions. [2020-12-22 07:08:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:08:32,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-12-22 07:08:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:32,268 INFO L225 Difference]: With dead ends: 4730 [2020-12-22 07:08:32,268 INFO L226 Difference]: Without dead ends: 2848 [2020-12-22 07:08:32,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:08:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2020-12-22 07:08:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1975. [2020-12-22 07:08:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2020-12-22 07:08:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2563 transitions. [2020-12-22 07:08:32,466 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2563 transitions. Word has length 87 [2020-12-22 07:08:32,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:32,466 INFO L481 AbstractCegarLoop]: Abstraction has 1975 states and 2563 transitions. [2020-12-22 07:08:32,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:08:32,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2563 transitions. [2020-12-22 07:08:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 07:08:32,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:32,468 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] [2020-12-22 07:08:32,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:08:32,468 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:32,469 INFO L82 PathProgramCache]: Analyzing trace with hash 227900145, now seen corresponding path program 1 times [2020-12-22 07:08:32,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:32,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894103116] [2020-12-22 07:08:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:08:32,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894103116] [2020-12-22 07:08:32,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:32,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:32,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337447444] [2020-12-22 07:08:32,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:32,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:32,509 INFO L87 Difference]: Start difference. First operand 1975 states and 2563 transitions. Second operand 4 states. [2020-12-22 07:08:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:32,866 INFO L93 Difference]: Finished difference Result 4765 states and 6185 transitions. [2020-12-22 07:08:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:32,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-12-22 07:08:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:32,882 INFO L225 Difference]: With dead ends: 4765 [2020-12-22 07:08:32,882 INFO L226 Difference]: Without dead ends: 2847 [2020-12-22 07:08:32,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2020-12-22 07:08:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1975. [2020-12-22 07:08:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2020-12-22 07:08:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2550 transitions. [2020-12-22 07:08:33,111 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2550 transitions. Word has length 87 [2020-12-22 07:08:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:33,111 INFO L481 AbstractCegarLoop]: Abstraction has 1975 states and 2550 transitions. [2020-12-22 07:08:33,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2550 transitions. [2020-12-22 07:08:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 07:08:33,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:33,113 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] [2020-12-22 07:08:33,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:08:33,113 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:33,114 INFO L82 PathProgramCache]: Analyzing trace with hash 887431667, now seen corresponding path program 1 times [2020-12-22 07:08:33,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:33,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120339559] [2020-12-22 07:08:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:08:33,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120339559] [2020-12-22 07:08:33,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:33,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207506779] [2020-12-22 07:08:33,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:33,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:33,187 INFO L87 Difference]: Start difference. First operand 1975 states and 2550 transitions. Second operand 3 states. [2020-12-22 07:08:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:33,402 INFO L93 Difference]: Finished difference Result 3937 states and 5082 transitions. [2020-12-22 07:08:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:33,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 07:08:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:33,413 INFO L225 Difference]: With dead ends: 3937 [2020-12-22 07:08:33,413 INFO L226 Difference]: Without dead ends: 1975 [2020-12-22 07:08:33,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2020-12-22 07:08:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1975. [2020-12-22 07:08:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2020-12-22 07:08:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2530 transitions. [2020-12-22 07:08:33,613 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2530 transitions. Word has length 87 [2020-12-22 07:08:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:33,613 INFO L481 AbstractCegarLoop]: Abstraction has 1975 states and 2530 transitions. [2020-12-22 07:08:33,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2530 transitions. [2020-12-22 07:08:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 07:08:33,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:33,615 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] [2020-12-22 07:08:33,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:08:33,615 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:33,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:33,616 INFO L82 PathProgramCache]: Analyzing trace with hash 43426165, now seen corresponding path program 1 times [2020-12-22 07:08:33,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:33,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766653968] [2020-12-22 07:08:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:08:33,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766653968] [2020-12-22 07:08:33,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:33,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:33,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155978234] [2020-12-22 07:08:33,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:33,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:33,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:33,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:33,687 INFO L87 Difference]: Start difference. First operand 1975 states and 2530 transitions. Second operand 4 states. [2020-12-22 07:08:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:34,046 INFO L93 Difference]: Finished difference Result 4691 states and 5998 transitions. [2020-12-22 07:08:34,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:34,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-12-22 07:08:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:34,059 INFO L225 Difference]: With dead ends: 4691 [2020-12-22 07:08:34,060 INFO L226 Difference]: Without dead ends: 2747 [2020-12-22 07:08:34,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2020-12-22 07:08:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 1885. [2020-12-22 07:08:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-12-22 07:08:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2367 transitions. [2020-12-22 07:08:34,335 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2367 transitions. Word has length 87 [2020-12-22 07:08:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:34,335 INFO L481 AbstractCegarLoop]: Abstraction has 1885 states and 2367 transitions. [2020-12-22 07:08:34,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:08:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2367 transitions. [2020-12-22 07:08:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 07:08:34,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:34,337 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] [2020-12-22 07:08:34,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:08:34,338 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:34,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:34,338 INFO L82 PathProgramCache]: Analyzing trace with hash -28960393, now seen corresponding path program 1 times [2020-12-22 07:08:34,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:34,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617362785] [2020-12-22 07:08:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:34,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617362785] [2020-12-22 07:08:34,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:34,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:34,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237836021] [2020-12-22 07:08:34,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:34,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:34,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:34,386 INFO L87 Difference]: Start difference. First operand 1885 states and 2367 transitions. Second operand 3 states. [2020-12-22 07:08:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:34,746 INFO L93 Difference]: Finished difference Result 5302 states and 6598 transitions. [2020-12-22 07:08:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:34,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 07:08:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:34,756 INFO L225 Difference]: With dead ends: 5302 [2020-12-22 07:08:34,756 INFO L226 Difference]: Without dead ends: 3478 [2020-12-22 07:08:34,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2020-12-22 07:08:35,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 3478. [2020-12-22 07:08:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3478 states. [2020-12-22 07:08:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 4277 transitions. [2020-12-22 07:08:35,170 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 4277 transitions. Word has length 87 [2020-12-22 07:08:35,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:35,170 INFO L481 AbstractCegarLoop]: Abstraction has 3478 states and 4277 transitions. [2020-12-22 07:08:35,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 4277 transitions. [2020-12-22 07:08:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 07:08:35,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:35,172 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:35,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:08:35,172 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:35,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1257798348, now seen corresponding path program 1 times [2020-12-22 07:08:35,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:35,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862169319] [2020-12-22 07:08:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:35,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862169319] [2020-12-22 07:08:35,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:35,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:35,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084228660] [2020-12-22 07:08:35,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:35,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:35,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:35,227 INFO L87 Difference]: Start difference. First operand 3478 states and 4277 transitions. Second operand 3 states. [2020-12-22 07:08:35,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:35,894 INFO L93 Difference]: Finished difference Result 9616 states and 11809 transitions. [2020-12-22 07:08:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:35,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-12-22 07:08:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:35,912 INFO L225 Difference]: With dead ends: 9616 [2020-12-22 07:08:35,912 INFO L226 Difference]: Without dead ends: 6256 [2020-12-22 07:08:35,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2020-12-22 07:08:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 6252. [2020-12-22 07:08:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6252 states. [2020-12-22 07:08:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6252 states to 6252 states and 7635 transitions. [2020-12-22 07:08:36,613 INFO L78 Accepts]: Start accepts. Automaton has 6252 states and 7635 transitions. Word has length 88 [2020-12-22 07:08:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:36,614 INFO L481 AbstractCegarLoop]: Abstraction has 6252 states and 7635 transitions. [2020-12-22 07:08:36,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6252 states and 7635 transitions. [2020-12-22 07:08:36,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 07:08:36,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:36,616 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:36,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:08:36,617 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash 657646591, now seen corresponding path program 1 times [2020-12-22 07:08:36,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:36,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752007816] [2020-12-22 07:08:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:36,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752007816] [2020-12-22 07:08:36,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:36,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863094800] [2020-12-22 07:08:36,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:36,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:36,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:36,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:36,668 INFO L87 Difference]: Start difference. First operand 6252 states and 7635 transitions. Second operand 3 states. [2020-12-22 07:08:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:37,999 INFO L93 Difference]: Finished difference Result 17538 states and 21399 transitions. [2020-12-22 07:08:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:38,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-22 07:08:38,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:38,023 INFO L225 Difference]: With dead ends: 17538 [2020-12-22 07:08:38,023 INFO L226 Difference]: Without dead ends: 11404 [2020-12-22 07:08:38,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2020-12-22 07:08:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11400. [2020-12-22 07:08:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11400 states. [2020-12-22 07:08:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11400 states to 11400 states and 13855 transitions. [2020-12-22 07:08:39,158 INFO L78 Accepts]: Start accepts. Automaton has 11400 states and 13855 transitions. Word has length 89 [2020-12-22 07:08:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:39,159 INFO L481 AbstractCegarLoop]: Abstraction has 11400 states and 13855 transitions. [2020-12-22 07:08:39,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 11400 states and 13855 transitions. [2020-12-22 07:08:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 07:08:39,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:39,162 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:39,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:08:39,163 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1221484355, now seen corresponding path program 1 times [2020-12-22 07:08:39,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:39,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795062115] [2020-12-22 07:08:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:08:39,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795062115] [2020-12-22 07:08:39,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:39,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:39,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154278742] [2020-12-22 07:08:39,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:39,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:39,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:39,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:39,194 INFO L87 Difference]: Start difference. First operand 11400 states and 13855 transitions. Second operand 3 states. [2020-12-22 07:08:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:40,426 INFO L93 Difference]: Finished difference Result 22572 states and 27451 transitions. [2020-12-22 07:08:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:40,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-22 07:08:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:40,451 INFO L225 Difference]: With dead ends: 22572 [2020-12-22 07:08:40,451 INFO L226 Difference]: Without dead ends: 11290 [2020-12-22 07:08:40,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:40,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11290 states. [2020-12-22 07:08:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11290 to 11290. [2020-12-22 07:08:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11290 states. [2020-12-22 07:08:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 13729 transitions. [2020-12-22 07:08:41,687 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 13729 transitions. Word has length 89 [2020-12-22 07:08:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:41,688 INFO L481 AbstractCegarLoop]: Abstraction has 11290 states and 13729 transitions. [2020-12-22 07:08:41,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 13729 transitions. [2020-12-22 07:08:41,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 07:08:41,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:41,691 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:41,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:08:41,691 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:41,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:41,693 INFO L82 PathProgramCache]: Analyzing trace with hash 965025050, now seen corresponding path program 1 times [2020-12-22 07:08:41,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:41,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92252095] [2020-12-22 07:08:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:41,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92252095] [2020-12-22 07:08:41,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:41,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:41,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974601097] [2020-12-22 07:08:41,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:41,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:41,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:41,773 INFO L87 Difference]: Start difference. First operand 11290 states and 13729 transitions. Second operand 3 states. [2020-12-22 07:08:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:43,402 INFO L93 Difference]: Finished difference Result 31756 states and 38669 transitions. [2020-12-22 07:08:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:43,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-22 07:08:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:43,445 INFO L225 Difference]: With dead ends: 31756 [2020-12-22 07:08:43,445 INFO L226 Difference]: Without dead ends: 20584 [2020-12-22 07:08:43,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20584 states. [2020-12-22 07:08:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20584 to 20580. [2020-12-22 07:08:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20580 states. [2020-12-22 07:08:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20580 states to 20580 states and 25005 transitions. [2020-12-22 07:08:44,882 INFO L78 Accepts]: Start accepts. Automaton has 20580 states and 25005 transitions. Word has length 90 [2020-12-22 07:08:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:44,883 INFO L481 AbstractCegarLoop]: Abstraction has 20580 states and 25005 transitions. [2020-12-22 07:08:44,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 20580 states and 25005 transitions. [2020-12-22 07:08:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 07:08:44,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:44,887 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:44,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:08:44,888 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:44,888 INFO L82 PathProgramCache]: Analyzing trace with hash -914105896, now seen corresponding path program 1 times [2020-12-22 07:08:44,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:44,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665547330] [2020-12-22 07:08:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:08:44,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665547330] [2020-12-22 07:08:44,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:44,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:44,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385926989] [2020-12-22 07:08:44,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:44,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:44,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:44,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:44,923 INFO L87 Difference]: Start difference. First operand 20580 states and 25005 transitions. Second operand 3 states. [2020-12-22 07:08:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:46,795 INFO L93 Difference]: Finished difference Result 40934 states and 49757 transitions. [2020-12-22 07:08:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:46,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-22 07:08:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:46,842 INFO L225 Difference]: With dead ends: 40934 [2020-12-22 07:08:46,843 INFO L226 Difference]: Without dead ends: 20472 [2020-12-22 07:08:46,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20472 states. [2020-12-22 07:08:48,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20472 to 20472. [2020-12-22 07:08:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20472 states. [2020-12-22 07:08:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20472 states to 20472 states and 24883 transitions. [2020-12-22 07:08:48,842 INFO L78 Accepts]: Start accepts. Automaton has 20472 states and 24883 transitions. Word has length 90 [2020-12-22 07:08:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:48,842 INFO L481 AbstractCegarLoop]: Abstraction has 20472 states and 24883 transitions. [2020-12-22 07:08:48,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 20472 states and 24883 transitions. [2020-12-22 07:08:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 07:08:48,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:48,846 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:48,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:08:48,846 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:48,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1266963889, now seen corresponding path program 1 times [2020-12-22 07:08:48,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:48,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898321332] [2020-12-22 07:08:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:08:48,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898321332] [2020-12-22 07:08:48,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:48,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:08:48,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625072290] [2020-12-22 07:08:48,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:08:48,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:48,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:08:48,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:48,890 INFO L87 Difference]: Start difference. First operand 20472 states and 24883 transitions. Second operand 3 states. [2020-12-22 07:08:51,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:51,586 INFO L93 Difference]: Finished difference Result 49428 states and 60301 transitions. [2020-12-22 07:08:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:08:51,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 07:08:51,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:51,803 INFO L225 Difference]: With dead ends: 49428 [2020-12-22 07:08:51,804 INFO L226 Difference]: Without dead ends: 34620 [2020-12-22 07:08:51,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:08:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34620 states. [2020-12-22 07:08:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34620 to 27842. [2020-12-22 07:08:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27842 states. [2020-12-22 07:08:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27842 states to 27842 states and 33821 transitions. [2020-12-22 07:08:54,180 INFO L78 Accepts]: Start accepts. Automaton has 27842 states and 33821 transitions. Word has length 91 [2020-12-22 07:08:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:08:54,180 INFO L481 AbstractCegarLoop]: Abstraction has 27842 states and 33821 transitions. [2020-12-22 07:08:54,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:08:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 27842 states and 33821 transitions. [2020-12-22 07:08:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 07:08:54,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:08:54,192 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:08:54,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:08:54,193 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:08:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:08:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash 751901331, now seen corresponding path program 1 times [2020-12-22 07:08:54,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:08:54,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777321846] [2020-12-22 07:08:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:08:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:08:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:08:54,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777321846] [2020-12-22 07:08:54,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:08:54,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:08:54,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189823402] [2020-12-22 07:08:54,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:08:54,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:54,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:08:54,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:08:54,267 INFO L87 Difference]: Start difference. First operand 27842 states and 33821 transitions. Second operand 4 states. [2020-12-22 07:08:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:58,671 INFO L93 Difference]: Finished difference Result 88574 states and 107581 transitions. [2020-12-22 07:08:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:08:58,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-12-22 07:08:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:58,756 INFO L225 Difference]: With dead ends: 88574 [2020-12-22 07:08:58,756 INFO L226 Difference]: Without dead ends: 60780 [2020-12-22 07:08:58,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:08:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60780 states. [2020-12-22 07:09:02,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60780 to 52392. [2020-12-22 07:09:02,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52392 states. [2020-12-22 07:09:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52392 states to 52392 states and 63345 transitions. [2020-12-22 07:09:03,006 INFO L78 Accepts]: Start accepts. Automaton has 52392 states and 63345 transitions. Word has length 120 [2020-12-22 07:09:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:03,006 INFO L481 AbstractCegarLoop]: Abstraction has 52392 states and 63345 transitions. [2020-12-22 07:09:03,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 52392 states and 63345 transitions. [2020-12-22 07:09:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 07:09:03,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:03,022 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:09:03,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:09:03,022 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:03,023 INFO L82 PathProgramCache]: Analyzing trace with hash 805064470, now seen corresponding path program 1 times [2020-12-22 07:09:03,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:03,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895857102] [2020-12-22 07:09:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:03,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895857102] [2020-12-22 07:09:03,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:03,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:03,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717846007] [2020-12-22 07:09:03,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:03,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:03,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:03,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:03,080 INFO L87 Difference]: Start difference. First operand 52392 states and 63345 transitions. Second operand 3 states. [2020-12-22 07:09:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:10,713 INFO L93 Difference]: Finished difference Result 151352 states and 182661 transitions. [2020-12-22 07:09:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:10,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 07:09:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:10,838 INFO L225 Difference]: With dead ends: 151352 [2020-12-22 07:09:10,838 INFO L226 Difference]: Without dead ends: 99076 [2020-12-22 07:09:10,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99076 states. [2020-12-22 07:09:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99076 to 98688. [2020-12-22 07:09:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98688 states. [2020-12-22 07:09:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98688 states to 98688 states and 118753 transitions. [2020-12-22 07:09:18,733 INFO L78 Accepts]: Start accepts. Automaton has 98688 states and 118753 transitions. Word has length 120 [2020-12-22 07:09:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:18,734 INFO L481 AbstractCegarLoop]: Abstraction has 98688 states and 118753 transitions. [2020-12-22 07:09:18,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:18,734 INFO L276 IsEmpty]: Start isEmpty. Operand 98688 states and 118753 transitions. [2020-12-22 07:09:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 07:09:18,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:18,756 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:09:18,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:09:18,756 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:18,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1762757864, now seen corresponding path program 1 times [2020-12-22 07:09:18,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:18,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876727687] [2020-12-22 07:09:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:09:18,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876727687] [2020-12-22 07:09:18,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:18,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:18,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138715862] [2020-12-22 07:09:18,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:18,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:18,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:18,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:18,786 INFO L87 Difference]: Start difference. First operand 98688 states and 118753 transitions. Second operand 3 states. [2020-12-22 07:09:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:26,644 INFO L93 Difference]: Finished difference Result 197156 states and 237267 transitions. [2020-12-22 07:09:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:26,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 07:09:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:26,778 INFO L225 Difference]: With dead ends: 197156 [2020-12-22 07:09:26,778 INFO L226 Difference]: Without dead ends: 98584 [2020-12-22 07:09:26,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98584 states. [2020-12-22 07:09:34,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98584 to 98584. [2020-12-22 07:09:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98584 states. [2020-12-22 07:09:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98584 states to 98584 states and 118639 transitions. [2020-12-22 07:09:34,753 INFO L78 Accepts]: Start accepts. Automaton has 98584 states and 118639 transitions. Word has length 120 [2020-12-22 07:09:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:34,754 INFO L481 AbstractCegarLoop]: Abstraction has 98584 states and 118639 transitions. [2020-12-22 07:09:34,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 98584 states and 118639 transitions. [2020-12-22 07:09:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:09:34,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:34,773 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:09:34,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:09:34,773 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:34,774 INFO L82 PathProgramCache]: Analyzing trace with hash -209027543, now seen corresponding path program 1 times [2020-12-22 07:09:34,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:34,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864150474] [2020-12-22 07:09:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:34,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864150474] [2020-12-22 07:09:34,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:34,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:09:34,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661161632] [2020-12-22 07:09:34,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:34,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:34,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:34,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:34,829 INFO L87 Difference]: Start difference. First operand 98584 states and 118639 transitions. Second operand 4 states. [2020-12-22 07:09:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:42,539 INFO L93 Difference]: Finished difference Result 174016 states and 209403 transitions. [2020-12-22 07:09:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:09:42,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2020-12-22 07:09:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:42,635 INFO L225 Difference]: With dead ends: 174016 [2020-12-22 07:09:42,635 INFO L226 Difference]: Without dead ends: 75492 [2020-12-22 07:09:42,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75492 states. [2020-12-22 07:09:48,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75492 to 75488. [2020-12-22 07:09:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75488 states. [2020-12-22 07:09:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75488 states to 75488 states and 90314 transitions. [2020-12-22 07:09:48,703 INFO L78 Accepts]: Start accepts. Automaton has 75488 states and 90314 transitions. Word has length 121 [2020-12-22 07:09:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:48,703 INFO L481 AbstractCegarLoop]: Abstraction has 75488 states and 90314 transitions. [2020-12-22 07:09:48,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 75488 states and 90314 transitions. [2020-12-22 07:09:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-22 07:09:48,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:48,739 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-12-22 07:09:48,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:09:48,740 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:48,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2110558493, now seen corresponding path program 1 times [2020-12-22 07:09:48,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:48,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662178840] [2020-12-22 07:09:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:48,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662178840] [2020-12-22 07:09:48,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:48,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:09:48,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793521231] [2020-12-22 07:09:48,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:48,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:48,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:49,002 INFO L87 Difference]: Start difference. First operand 75488 states and 90314 transitions. Second operand 4 states. [2020-12-22 07:09:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:54,863 INFO L93 Difference]: Finished difference Result 151216 states and 180858 transitions. [2020-12-22 07:09:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:09:54,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2020-12-22 07:09:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:54,959 INFO L225 Difference]: With dead ends: 151216 [2020-12-22 07:09:54,959 INFO L226 Difference]: Without dead ends: 64096 [2020-12-22 07:09:55,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64096 states. [2020-12-22 07:09:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64096 to 63548. [2020-12-22 07:09:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63548 states. [2020-12-22 07:09:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63548 states to 63548 states and 75893 transitions. [2020-12-22 07:09:59,957 INFO L78 Accepts]: Start accepts. Automaton has 63548 states and 75893 transitions. Word has length 175 [2020-12-22 07:09:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:59,958 INFO L481 AbstractCegarLoop]: Abstraction has 63548 states and 75893 transitions. [2020-12-22 07:09:59,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 63548 states and 75893 transitions. [2020-12-22 07:09:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-22 07:09:59,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:59,976 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 07:09:59,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:09:59,976 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash -224407011, now seen corresponding path program 1 times [2020-12-22 07:09:59,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:59,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797140666] [2020-12-22 07:09:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:10:00,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797140666] [2020-12-22 07:10:00,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:00,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:00,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325662439] [2020-12-22 07:10:00,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:00,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:00,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:00,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:00,056 INFO L87 Difference]: Start difference. First operand 63548 states and 75893 transitions. Second operand 4 states. [2020-12-22 07:10:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:05,866 INFO L93 Difference]: Finished difference Result 134432 states and 160018 transitions. [2020-12-22 07:10:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:05,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2020-12-22 07:10:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:05,954 INFO L225 Difference]: With dead ends: 134432 [2020-12-22 07:10:05,954 INFO L226 Difference]: Without dead ends: 70944 [2020-12-22 07:10:05,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70944 states. [2020-12-22 07:10:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70944 to 61772. [2020-12-22 07:10:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61772 states. [2020-12-22 07:10:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61772 states to 61772 states and 72292 transitions. [2020-12-22 07:10:10,921 INFO L78 Accepts]: Start accepts. Automaton has 61772 states and 72292 transitions. Word has length 175 [2020-12-22 07:10:10,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:10,921 INFO L481 AbstractCegarLoop]: Abstraction has 61772 states and 72292 transitions. [2020-12-22 07:10:10,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:10,921 INFO L276 IsEmpty]: Start isEmpty. Operand 61772 states and 72292 transitions. [2020-12-22 07:10:10,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-22 07:10:10,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:10,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:10,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:10:10,947 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:10,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1974744232, now seen corresponding path program 1 times [2020-12-22 07:10:10,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:10,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682159098] [2020-12-22 07:10:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 07:10:11,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682159098] [2020-12-22 07:10:11,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:11,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241172374] [2020-12-22 07:10:11,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:11,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:11,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:11,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:11,245 INFO L87 Difference]: Start difference. First operand 61772 states and 72292 transitions. Second operand 3 states. [2020-12-22 07:10:16,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:16,638 INFO L93 Difference]: Finished difference Result 134232 states and 156806 transitions. [2020-12-22 07:10:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:16,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2020-12-22 07:10:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:16,743 INFO L225 Difference]: With dead ends: 134232 [2020-12-22 07:10:16,743 INFO L226 Difference]: Without dead ends: 72499 [2020-12-22 07:10:16,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:16,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72499 states. [2020-12-22 07:10:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72499 to 72179. [2020-12-22 07:10:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72179 states. [2020-12-22 07:10:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72179 states to 72179 states and 83994 transitions. [2020-12-22 07:10:22,371 INFO L78 Accepts]: Start accepts. Automaton has 72179 states and 83994 transitions. Word has length 210 [2020-12-22 07:10:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:22,371 INFO L481 AbstractCegarLoop]: Abstraction has 72179 states and 83994 transitions. [2020-12-22 07:10:22,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand 72179 states and 83994 transitions. [2020-12-22 07:10:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-12-22 07:10:22,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:22,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:22,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:10:22,409 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1362662384, now seen corresponding path program 1 times [2020-12-22 07:10:22,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:22,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360870120] [2020-12-22 07:10:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:22,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360870120] [2020-12-22 07:10:22,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:22,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:10:22,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494441499] [2020-12-22 07:10:22,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:22,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:22,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:22,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:22,487 INFO L87 Difference]: Start difference. First operand 72179 states and 83994 transitions. Second operand 4 states. [2020-12-22 07:10:28,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:28,201 INFO L93 Difference]: Finished difference Result 133927 states and 156262 transitions. [2020-12-22 07:10:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:10:28,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 213 [2020-12-22 07:10:28,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:28,292 INFO L225 Difference]: With dead ends: 133927 [2020-12-22 07:10:28,292 INFO L226 Difference]: Without dead ends: 72215 [2020-12-22 07:10:28,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72215 states.