/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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:01:06,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:01:06,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:01:06,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 09:01:06,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:01:06,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:01:06,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:01:06,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:01:06,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:01:06,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:01:06,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:01:06,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:01:06,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:01:06,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:01:06,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:01:06,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:01:06,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:01:06,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:01:06,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:01:06,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:01:06,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:01:06,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:01:06,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:01:07,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:01:07,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:01:07,004 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:01:07,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:01:07,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:01:07,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:01:07,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:01:07,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:01:07,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:01:07,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:01:07,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:01:07,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:01:07,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:01:07,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:01:07,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:01:07,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:01:07,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:01:07,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:01:07,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:01:07,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:01:07,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:01:07,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:01:07,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:01:07,009 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:01:07,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:01:07,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:01:07,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:01:07,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:01:07,435 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:01:07,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:01:07,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3e0b968e/639f3e68523b41739006cb528cc16d20/FLAG6f63d0fd3 [2020-12-22 09:01:08,065 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:01:08,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:01:08,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3e0b968e/639f3e68523b41739006cb528cc16d20/FLAG6f63d0fd3 [2020-12-22 09:01:08,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3e0b968e/639f3e68523b41739006cb528cc16d20 [2020-12-22 09:01:08,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:01:08,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:01:08,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:01:08,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:01:08,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:01:08,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:08,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fef825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08, skipping insertion in model container [2020-12-22 09:01:08,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:08,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:01:08,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:01:08,696 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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7348,7361] [2020-12-22 09:01:08,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:01:08,761 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:01:08,816 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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7348,7361] [2020-12-22 09:01:08,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:01:08,868 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:01:08,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08 WrapperNode [2020-12-22 09:01:08,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:01:08,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:01:08,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:01:08,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:01:08,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:08,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:08,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:01:08,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:01:08,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:01:08,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:01:08,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:08,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:08,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:08,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:09,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:09,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:09,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (1/1) ... [2020-12-22 09:01:09,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:01:09,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:01:09,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:01:09,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:01:09,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (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 09:01:09,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:01:09,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:01:09,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:01:09,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:01:10,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:01:10,215 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:01:10,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:01:10 BoogieIcfgContainer [2020-12-22 09:01:10,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:01:10,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:01:10,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:01:10,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:01:10,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:01:08" (1/3) ... [2020-12-22 09:01:10,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313350b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:01:10, skipping insertion in model container [2020-12-22 09:01:10,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:08" (2/3) ... [2020-12-22 09:01:10,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313350b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:01:10, skipping insertion in model container [2020-12-22 09:01:10,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:01:10" (3/3) ... [2020-12-22 09:01:10,226 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:01:10,233 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:01:10,238 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:01:10,257 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:01:10,284 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:01:10,285 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:01:10,285 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:01:10,285 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:01:10,285 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:01:10,285 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:01:10,286 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:01:10,286 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:01:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-12-22 09:01:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:01:10,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:10,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:01:10,316 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash -970283638, now seen corresponding path program 1 times [2020-12-22 09:01:10,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:10,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914212064] [2020-12-22 09:01:10,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:10,761 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 09:01:10,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914212064] [2020-12-22 09:01:10,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:10,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:10,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822744601] [2020-12-22 09:01:10,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:10,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:10,798 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 3 states. [2020-12-22 09:01:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:10,964 INFO L93 Difference]: Finished difference Result 335 states and 559 transitions. [2020-12-22 09:01:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:10,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:01:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:10,981 INFO L225 Difference]: With dead ends: 335 [2020-12-22 09:01:10,981 INFO L226 Difference]: Without dead ends: 231 [2020-12-22 09:01:10,985 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 09:01:11,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-22 09:01:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2020-12-22 09:01:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-12-22 09:01:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 359 transitions. [2020-12-22 09:01:11,060 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 359 transitions. Word has length 56 [2020-12-22 09:01:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:11,061 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 359 transitions. [2020-12-22 09:01:11,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 359 transitions. [2020-12-22 09:01:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 09:01:11,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:11,065 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] [2020-12-22 09:01:11,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:01:11,066 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:11,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1615417163, now seen corresponding path program 1 times [2020-12-22 09:01:11,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:11,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060757976] [2020-12-22 09:01:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:11,214 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 09:01:11,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060757976] [2020-12-22 09:01:11,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:11,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:11,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824700874] [2020-12-22 09:01:11,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:11,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:11,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:11,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:11,221 INFO L87 Difference]: Start difference. First operand 228 states and 359 transitions. Second operand 3 states. [2020-12-22 09:01:11,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:11,297 INFO L93 Difference]: Finished difference Result 566 states and 911 transitions. [2020-12-22 09:01:11,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:11,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 09:01:11,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:11,303 INFO L225 Difference]: With dead ends: 566 [2020-12-22 09:01:11,303 INFO L226 Difference]: Without dead ends: 389 [2020-12-22 09:01:11,305 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 09:01:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-12-22 09:01:11,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 385. [2020-12-22 09:01:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-12-22 09:01:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 614 transitions. [2020-12-22 09:01:11,353 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 614 transitions. Word has length 58 [2020-12-22 09:01:11,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:11,353 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 614 transitions. [2020-12-22 09:01:11,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:11,354 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 614 transitions. [2020-12-22 09:01:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:01:11,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:11,357 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] [2020-12-22 09:01:11,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:01:11,359 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1881805132, now seen corresponding path program 1 times [2020-12-22 09:01:11,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:11,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292503554] [2020-12-22 09:01:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:11,520 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 09:01:11,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292503554] [2020-12-22 09:01:11,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:11,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:11,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673332078] [2020-12-22 09:01:11,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:11,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:11,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:11,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:11,527 INFO L87 Difference]: Start difference. First operand 385 states and 614 transitions. Second operand 3 states. [2020-12-22 09:01:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:11,625 INFO L93 Difference]: Finished difference Result 1021 states and 1648 transitions. [2020-12-22 09:01:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:11,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 09:01:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:11,633 INFO L225 Difference]: With dead ends: 1021 [2020-12-22 09:01:11,633 INFO L226 Difference]: Without dead ends: 687 [2020-12-22 09:01:11,638 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 09:01:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-12-22 09:01:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 681. [2020-12-22 09:01:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2020-12-22 09:01:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1090 transitions. [2020-12-22 09:01:11,717 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1090 transitions. Word has length 60 [2020-12-22 09:01:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:11,724 INFO L481 AbstractCegarLoop]: Abstraction has 681 states and 1090 transitions. [2020-12-22 09:01:11,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1090 transitions. [2020-12-22 09:01:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 09:01:11,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:11,736 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] [2020-12-22 09:01:11,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:01:11,736 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 333047117, now seen corresponding path program 1 times [2020-12-22 09:01:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:11,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306764948] [2020-12-22 09:01:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:11,936 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 09:01:11,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306764948] [2020-12-22 09:01:11,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:11,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:01:11,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59978751] [2020-12-22 09:01:11,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:01:11,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:11,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:01:11,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:01:11,943 INFO L87 Difference]: Start difference. First operand 681 states and 1090 transitions. Second operand 5 states. [2020-12-22 09:01:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:12,255 INFO L93 Difference]: Finished difference Result 2973 states and 4848 transitions. [2020-12-22 09:01:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:01:12,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 09:01:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:12,271 INFO L225 Difference]: With dead ends: 2973 [2020-12-22 09:01:12,271 INFO L226 Difference]: Without dead ends: 2343 [2020-12-22 09:01:12,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:01:12,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2020-12-22 09:01:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1233. [2020-12-22 09:01:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1233 states. [2020-12-22 09:01:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1985 transitions. [2020-12-22 09:01:12,368 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1985 transitions. Word has length 62 [2020-12-22 09:01:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:12,370 INFO L481 AbstractCegarLoop]: Abstraction has 1233 states and 1985 transitions. [2020-12-22 09:01:12,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:01:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1985 transitions. [2020-12-22 09:01:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:01:12,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:12,373 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] [2020-12-22 09:01:12,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:01:12,374 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:12,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:12,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1672021844, now seen corresponding path program 1 times [2020-12-22 09:01:12,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:12,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612221445] [2020-12-22 09:01:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:12,526 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 09:01:12,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612221445] [2020-12-22 09:01:12,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:12,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:12,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210694600] [2020-12-22 09:01:12,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:12,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:12,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:12,531 INFO L87 Difference]: Start difference. First operand 1233 states and 1985 transitions. Second operand 4 states. [2020-12-22 09:01:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:12,757 INFO L93 Difference]: Finished difference Result 3613 states and 5881 transitions. [2020-12-22 09:01:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:12,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 09:01:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:12,772 INFO L225 Difference]: With dead ends: 3613 [2020-12-22 09:01:12,772 INFO L226 Difference]: Without dead ends: 2431 [2020-12-22 09:01:12,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:01:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2020-12-22 09:01:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1823. [2020-12-22 09:01:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1823 states. [2020-12-22 09:01:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2946 transitions. [2020-12-22 09:01:12,898 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2946 transitions. Word has length 63 [2020-12-22 09:01:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:12,900 INFO L481 AbstractCegarLoop]: Abstraction has 1823 states and 2946 transitions. [2020-12-22 09:01:12,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2946 transitions. [2020-12-22 09:01:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:01:12,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:12,902 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] [2020-12-22 09:01:12,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:01:12,903 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:12,903 INFO L82 PathProgramCache]: Analyzing trace with hash 235123444, now seen corresponding path program 1 times [2020-12-22 09:01:12,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:12,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445710548] [2020-12-22 09:01:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:12,988 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 09:01:12,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445710548] [2020-12-22 09:01:12,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:12,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:12,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494492325] [2020-12-22 09:01:12,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:12,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:12,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:12,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:12,991 INFO L87 Difference]: Start difference. First operand 1823 states and 2946 transitions. Second operand 4 states. [2020-12-22 09:01:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:13,314 INFO L93 Difference]: Finished difference Result 5459 states and 8871 transitions. [2020-12-22 09:01:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:13,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 09:01:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:13,334 INFO L225 Difference]: With dead ends: 5459 [2020-12-22 09:01:13,334 INFO L226 Difference]: Without dead ends: 3687 [2020-12-22 09:01:13,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2020-12-22 09:01:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2667. [2020-12-22 09:01:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2667 states. [2020-12-22 09:01:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 4306 transitions. [2020-12-22 09:01:13,538 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 4306 transitions. Word has length 64 [2020-12-22 09:01:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:13,538 INFO L481 AbstractCegarLoop]: Abstraction has 2667 states and 4306 transitions. [2020-12-22 09:01:13,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 4306 transitions. [2020-12-22 09:01:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:01:13,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:13,542 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] [2020-12-22 09:01:13,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:01:13,542 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:13,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1354495973, now seen corresponding path program 1 times [2020-12-22 09:01:13,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:13,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946401839] [2020-12-22 09:01:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:13,657 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 09:01:13,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946401839] [2020-12-22 09:01:13,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:13,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:13,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61858148] [2020-12-22 09:01:13,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:13,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:13,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:13,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:13,660 INFO L87 Difference]: Start difference. First operand 2667 states and 4306 transitions. Second operand 4 states. [2020-12-22 09:01:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:14,044 INFO L93 Difference]: Finished difference Result 8027 states and 13019 transitions. [2020-12-22 09:01:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:14,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 09:01:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:14,072 INFO L225 Difference]: With dead ends: 8027 [2020-12-22 09:01:14,072 INFO L226 Difference]: Without dead ends: 5411 [2020-12-22 09:01:14,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:14,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2020-12-22 09:01:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 3863. [2020-12-22 09:01:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3863 states. [2020-12-22 09:01:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 6228 transitions. [2020-12-22 09:01:14,391 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 6228 transitions. Word has length 65 [2020-12-22 09:01:14,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:14,391 INFO L481 AbstractCegarLoop]: Abstraction has 3863 states and 6228 transitions. [2020-12-22 09:01:14,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:14,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 6228 transitions. [2020-12-22 09:01:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:01:14,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:14,394 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] [2020-12-22 09:01:14,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:01:14,394 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:14,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1658042238, now seen corresponding path program 1 times [2020-12-22 09:01:14,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:14,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125279927] [2020-12-22 09:01:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:14,456 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 09:01:14,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125279927] [2020-12-22 09:01:14,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:14,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:14,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758506511] [2020-12-22 09:01:14,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:14,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:14,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:14,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:14,458 INFO L87 Difference]: Start difference. First operand 3863 states and 6228 transitions. Second operand 3 states. [2020-12-22 09:01:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:14,799 INFO L93 Difference]: Finished difference Result 8640 states and 14034 transitions. [2020-12-22 09:01:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:14,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:01:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:14,830 INFO L225 Difference]: With dead ends: 8640 [2020-12-22 09:01:14,831 INFO L226 Difference]: Without dead ends: 5875 [2020-12-22 09:01:14,836 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 09:01:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2020-12-22 09:01:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 5873. [2020-12-22 09:01:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5873 states. [2020-12-22 09:01:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 9472 transitions. [2020-12-22 09:01:15,237 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 9472 transitions. Word has length 66 [2020-12-22 09:01:15,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:15,237 INFO L481 AbstractCegarLoop]: Abstraction has 5873 states and 9472 transitions. [2020-12-22 09:01:15,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 9472 transitions. [2020-12-22 09:01:15,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:01:15,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:15,238 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] [2020-12-22 09:01:15,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:01:15,239 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:15,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1876407130, now seen corresponding path program 1 times [2020-12-22 09:01:15,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:15,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316871528] [2020-12-22 09:01:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:15,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316871528] [2020-12-22 09:01:15,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:15,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:15,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435444355] [2020-12-22 09:01:15,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:15,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:15,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:15,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:15,311 INFO L87 Difference]: Start difference. First operand 5873 states and 9472 transitions. Second operand 3 states. [2020-12-22 09:01:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:15,918 INFO L93 Difference]: Finished difference Result 12987 states and 20989 transitions. [2020-12-22 09:01:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:15,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:01:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:15,966 INFO L225 Difference]: With dead ends: 12987 [2020-12-22 09:01:15,967 INFO L226 Difference]: Without dead ends: 8817 [2020-12-22 09:01:15,973 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 09:01:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2020-12-22 09:01:16,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 8815. [2020-12-22 09:01:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8815 states. [2020-12-22 09:01:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 14152 transitions. [2020-12-22 09:01:16,544 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 14152 transitions. Word has length 66 [2020-12-22 09:01:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:16,544 INFO L481 AbstractCegarLoop]: Abstraction has 8815 states and 14152 transitions. [2020-12-22 09:01:16,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 14152 transitions. [2020-12-22 09:01:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:01:16,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:16,546 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] [2020-12-22 09:01:16,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:01:16,547 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash -430026452, now seen corresponding path program 1 times [2020-12-22 09:01:16,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:16,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39650598] [2020-12-22 09:01:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:16,603 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 09:01:16,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39650598] [2020-12-22 09:01:16,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:16,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:16,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832645176] [2020-12-22 09:01:16,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:16,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:16,606 INFO L87 Difference]: Start difference. First operand 8815 states and 14152 transitions. Second operand 3 states. [2020-12-22 09:01:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:17,383 INFO L93 Difference]: Finished difference Result 19164 states and 30838 transitions. [2020-12-22 09:01:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:17,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:01:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:17,423 INFO L225 Difference]: With dead ends: 19164 [2020-12-22 09:01:17,423 INFO L226 Difference]: Without dead ends: 12900 [2020-12-22 09:01:17,438 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 09:01:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12900 states. [2020-12-22 09:01:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12900 to 12898. [2020-12-22 09:01:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12898 states. [2020-12-22 09:01:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12898 states to 12898 states and 20599 transitions. [2020-12-22 09:01:18,314 INFO L78 Accepts]: Start accepts. Automaton has 12898 states and 20599 transitions. Word has length 66 [2020-12-22 09:01:18,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:18,314 INFO L481 AbstractCegarLoop]: Abstraction has 12898 states and 20599 transitions. [2020-12-22 09:01:18,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:18,314 INFO L276 IsEmpty]: Start isEmpty. Operand 12898 states and 20599 transitions. [2020-12-22 09:01:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:01:18,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:18,315 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] [2020-12-22 09:01:18,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:01:18,316 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:18,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1812850740, now seen corresponding path program 1 times [2020-12-22 09:01:18,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:18,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148494797] [2020-12-22 09:01:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:18,424 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 09:01:18,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148494797] [2020-12-22 09:01:18,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:18,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:18,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807391025] [2020-12-22 09:01:18,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:18,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:18,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:18,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:18,426 INFO L87 Difference]: Start difference. First operand 12898 states and 20599 transitions. Second operand 4 states. [2020-12-22 09:01:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:19,811 INFO L93 Difference]: Finished difference Result 37923 states and 60526 transitions. [2020-12-22 09:01:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:19,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 09:01:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:19,867 INFO L225 Difference]: With dead ends: 37923 [2020-12-22 09:01:19,868 INFO L226 Difference]: Without dead ends: 25034 [2020-12-22 09:01:19,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 09:01:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25034 states. [2020-12-22 09:01:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25034 to 25032. [2020-12-22 09:01:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25032 states. [2020-12-22 09:01:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25032 states to 25032 states and 39715 transitions. [2020-12-22 09:01:21,503 INFO L78 Accepts]: Start accepts. Automaton has 25032 states and 39715 transitions. Word has length 67 [2020-12-22 09:01:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:21,503 INFO L481 AbstractCegarLoop]: Abstraction has 25032 states and 39715 transitions. [2020-12-22 09:01:21,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 25032 states and 39715 transitions. [2020-12-22 09:01:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:01:21,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:21,504 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] [2020-12-22 09:01:21,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:01:21,505 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash 457678524, now seen corresponding path program 1 times [2020-12-22 09:01:21,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:21,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565261316] [2020-12-22 09:01:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:21,552 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 09:01:21,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565261316] [2020-12-22 09:01:21,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:21,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:21,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558843822] [2020-12-22 09:01:21,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:21,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:21,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:21,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:21,554 INFO L87 Difference]: Start difference. First operand 25032 states and 39715 transitions. Second operand 3 states. [2020-12-22 09:01:23,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:23,191 INFO L93 Difference]: Finished difference Result 60515 states and 96528 transitions. [2020-12-22 09:01:23,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:23,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:01:23,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:23,265 INFO L225 Difference]: With dead ends: 60515 [2020-12-22 09:01:23,265 INFO L226 Difference]: Without dead ends: 35598 [2020-12-22 09:01:23,302 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 09:01:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35598 states. [2020-12-22 09:01:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35598 to 34322. [2020-12-22 09:01:25,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34322 states. [2020-12-22 09:01:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34322 states to 34322 states and 54382 transitions. [2020-12-22 09:01:25,487 INFO L78 Accepts]: Start accepts. Automaton has 34322 states and 54382 transitions. Word has length 68 [2020-12-22 09:01:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:25,487 INFO L481 AbstractCegarLoop]: Abstraction has 34322 states and 54382 transitions. [2020-12-22 09:01:25,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 34322 states and 54382 transitions. [2020-12-22 09:01:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:01:25,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:25,489 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] [2020-12-22 09:01:25,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:01:25,489 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:25,490 INFO L82 PathProgramCache]: Analyzing trace with hash 230797016, now seen corresponding path program 1 times [2020-12-22 09:01:25,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:25,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594935458] [2020-12-22 09:01:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:25,531 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 09:01:25,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594935458] [2020-12-22 09:01:25,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:25,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:25,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239216087] [2020-12-22 09:01:25,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:25,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:25,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:25,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:25,533 INFO L87 Difference]: Start difference. First operand 34322 states and 54382 transitions. Second operand 3 states. [2020-12-22 09:01:28,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:28,425 INFO L93 Difference]: Finished difference Result 102928 states and 163084 transitions. [2020-12-22 09:01:28,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:28,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:01:28,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:28,563 INFO L225 Difference]: With dead ends: 102928 [2020-12-22 09:01:28,564 INFO L226 Difference]: Without dead ends: 68634 [2020-12-22 09:01:28,602 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 09:01:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68634 states. [2020-12-22 09:01:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68634 to 34324. [2020-12-22 09:01:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34324 states. [2020-12-22 09:01:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34324 states to 34324 states and 54384 transitions. [2020-12-22 09:01:31,248 INFO L78 Accepts]: Start accepts. Automaton has 34324 states and 54384 transitions. Word has length 68 [2020-12-22 09:01:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:31,248 INFO L481 AbstractCegarLoop]: Abstraction has 34324 states and 54384 transitions. [2020-12-22 09:01:31,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 34324 states and 54384 transitions. [2020-12-22 09:01:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:01:31,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:31,250 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] [2020-12-22 09:01:31,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:01:31,250 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:31,251 INFO L82 PathProgramCache]: Analyzing trace with hash -986650261, now seen corresponding path program 1 times [2020-12-22 09:01:31,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:31,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366008765] [2020-12-22 09:01:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:31,347 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 09:01:31,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366008765] [2020-12-22 09:01:31,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:31,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:31,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258807221] [2020-12-22 09:01:31,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:31,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:31,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:31,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:31,349 INFO L87 Difference]: Start difference. First operand 34324 states and 54384 transitions. Second operand 4 states. [2020-12-22 09:01:35,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:35,161 INFO L93 Difference]: Finished difference Result 100866 states and 159708 transitions. [2020-12-22 09:01:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:35,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 09:01:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:35,277 INFO L225 Difference]: With dead ends: 100866 [2020-12-22 09:01:35,277 INFO L226 Difference]: Without dead ends: 66572 [2020-12-22 09:01:35,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 09:01:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66572 states. [2020-12-22 09:01:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66572 to 66570. [2020-12-22 09:01:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66570 states. [2020-12-22 09:01:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66570 states to 66570 states and 104812 transitions. [2020-12-22 09:01:39,570 INFO L78 Accepts]: Start accepts. Automaton has 66570 states and 104812 transitions. Word has length 69 [2020-12-22 09:01:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:39,570 INFO L481 AbstractCegarLoop]: Abstraction has 66570 states and 104812 transitions. [2020-12-22 09:01:39,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 66570 states and 104812 transitions. [2020-12-22 09:01:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:01:39,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:39,571 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] [2020-12-22 09:01:39,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:01:39,572 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:39,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1835064599, now seen corresponding path program 1 times [2020-12-22 09:01:39,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:39,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006029127] [2020-12-22 09:01:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:39,604 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 09:01:39,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006029127] [2020-12-22 09:01:39,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:39,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:39,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933296224] [2020-12-22 09:01:39,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:39,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:39,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:39,606 INFO L87 Difference]: Start difference. First operand 66570 states and 104812 transitions. Second operand 3 states. [2020-12-22 09:01:46,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:46,931 INFO L93 Difference]: Finished difference Result 199634 states and 314316 transitions. [2020-12-22 09:01:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:46,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:01:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:47,153 INFO L225 Difference]: With dead ends: 199634 [2020-12-22 09:01:47,153 INFO L226 Difference]: Without dead ends: 133108 [2020-12-22 09:01:47,227 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 09:01:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133108 states. [2020-12-22 09:01:52,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133108 to 66574. [2020-12-22 09:01:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66574 states. [2020-12-22 09:01:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66574 states to 66574 states and 104816 transitions. [2020-12-22 09:01:52,218 INFO L78 Accepts]: Start accepts. Automaton has 66574 states and 104816 transitions. Word has length 70 [2020-12-22 09:01:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:52,219 INFO L481 AbstractCegarLoop]: Abstraction has 66574 states and 104816 transitions. [2020-12-22 09:01:52,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 66574 states and 104816 transitions. [2020-12-22 09:01:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:01:52,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:52,221 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] [2020-12-22 09:01:52,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:01:52,221 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1009269311, now seen corresponding path program 1 times [2020-12-22 09:01:52,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:52,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984175818] [2020-12-22 09:01:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:52,265 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 09:01:52,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984175818] [2020-12-22 09:01:52,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:52,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:52,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859673589] [2020-12-22 09:01:52,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:52,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:52,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:52,267 INFO L87 Difference]: Start difference. First operand 66574 states and 104816 transitions. Second operand 3 states. [2020-12-22 09:01:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:58,455 INFO L93 Difference]: Finished difference Result 160570 states and 253694 transitions. [2020-12-22 09:01:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:58,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:01:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:58,600 INFO L225 Difference]: With dead ends: 160570 [2020-12-22 09:01:58,600 INFO L226 Difference]: Without dead ends: 94264 [2020-12-22 09:01:58,794 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 09:01:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94264 states. [2020-12-22 09:02:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94264 to 90934. [2020-12-22 09:02:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90934 states. [2020-12-22 09:02:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90934 states to 90934 states and 142722 transitions. [2020-12-22 09:02:04,829 INFO L78 Accepts]: Start accepts. Automaton has 90934 states and 142722 transitions. Word has length 70 [2020-12-22 09:02:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:04,829 INFO L481 AbstractCegarLoop]: Abstraction has 90934 states and 142722 transitions. [2020-12-22 09:02:04,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 90934 states and 142722 transitions. [2020-12-22 09:02:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 09:02:04,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:04,830 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] [2020-12-22 09:02:04,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:02:04,830 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:04,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1513559690, now seen corresponding path program 1 times [2020-12-22 09:02:04,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:04,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858392903] [2020-12-22 09:02:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:04,960 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 09:02:04,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858392903] [2020-12-22 09:02:04,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:04,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:02:04,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551015013] [2020-12-22 09:02:04,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:02:04,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:04,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:02:04,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:02:04,963 INFO L87 Difference]: Start difference. First operand 90934 states and 142722 transitions. Second operand 4 states. [2020-12-22 09:02:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:16,631 INFO L93 Difference]: Finished difference Result 266958 states and 418618 transitions. [2020-12-22 09:02:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:02:16,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 09:02:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:17,104 INFO L225 Difference]: With dead ends: 266958 [2020-12-22 09:02:17,104 INFO L226 Difference]: Without dead ends: 176072 [2020-12-22 09:02:17,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 09:02:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176072 states. [2020-12-22 09:02:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176072 to 176070. [2020-12-22 09:02:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176070 states. [2020-12-22 09:02:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176070 states to 176070 states and 274400 transitions. [2020-12-22 09:02:29,358 INFO L78 Accepts]: Start accepts. Automaton has 176070 states and 274400 transitions. Word has length 71 [2020-12-22 09:02:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:29,359 INFO L481 AbstractCegarLoop]: Abstraction has 176070 states and 274400 transitions. [2020-12-22 09:02:29,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:02:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 176070 states and 274400 transitions. [2020-12-22 09:02:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 09:02:29,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:29,380 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 09:02:29,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:02:29,380 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:29,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1184861910, now seen corresponding path program 1 times [2020-12-22 09:02:29,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:29,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002860641] [2020-12-22 09:02:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:29,431 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 09:02:29,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002860641] [2020-12-22 09:02:29,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:29,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:29,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28866489] [2020-12-22 09:02:29,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:29,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:29,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:29,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:29,433 INFO L87 Difference]: Start difference. First operand 176070 states and 274400 transitions. Second operand 3 states. [2020-12-22 09:02:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:52,505 INFO L93 Difference]: Finished difference Result 527798 states and 822654 transitions. [2020-12-22 09:02:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:52,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 09:02:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:53,193 INFO L225 Difference]: With dead ends: 527798 [2020-12-22 09:02:53,193 INFO L226 Difference]: Without dead ends: 352048 [2020-12-22 09:02:53,371 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 09:02:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352048 states. [2020-12-22 09:03:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352048 to 176078. [2020-12-22 09:03:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176078 states. [2020-12-22 09:03:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176078 states to 176078 states and 274408 transitions. [2020-12-22 09:03:08,059 INFO L78 Accepts]: Start accepts. Automaton has 176078 states and 274408 transitions. Word has length 72 [2020-12-22 09:03:08,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:08,059 INFO L481 AbstractCegarLoop]: Abstraction has 176078 states and 274408 transitions. [2020-12-22 09:03:08,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 176078 states and 274408 transitions. [2020-12-22 09:03:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 09:03:08,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:08,061 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 09:03:08,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:03:08,062 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:08,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2001628748, now seen corresponding path program 1 times [2020-12-22 09:03:08,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:08,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162032308] [2020-12-22 09:03:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:08,123 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 09:03:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162032308] [2020-12-22 09:03:08,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:08,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:08,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614577360] [2020-12-22 09:03:08,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:08,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:08,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:08,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:08,128 INFO L87 Difference]: Start difference. First operand 176078 states and 274408 transitions. Second operand 3 states.