/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/pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:41:05,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:41:05,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:41:05,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:41:05,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:41:05,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:41:05,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:41:05,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:41:05,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:41:05,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:41:05,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:41:05,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:41:05,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:41:05,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:41:05,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:41:06,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:41:06,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:41:06,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:41:06,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:41:06,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:41:06,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:41:06,071 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:41:06,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:41:06,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:41:06,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:41:06,076 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:41:06,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:41:06,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:41:06,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:41:06,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:41:06,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:41:06,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:41:06,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:41:06,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:41:06,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:41:06,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:41:06,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:41:06,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:41:06,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:41:06,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:41:06,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:41:06,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:41:06,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:41:06,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:41:06,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:41:06,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:41:06,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:41:06,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:41:06,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:41:06,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:41:06,498 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:41:06,499 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:41:06,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:41:06,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c53da33/01b53e533e6945628454ee1a8d62d8fe/FLAG3bb2050e8 [2020-12-22 07:41:07,212 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:41:07,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:41:07,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c53da33/01b53e533e6945628454ee1a8d62d8fe/FLAG3bb2050e8 [2020-12-22 07:41:07,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c53da33/01b53e533e6945628454ee1a8d62d8fe [2020-12-22 07:41:07,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:41:07,548 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:41:07,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:41:07,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:41:07,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:41:07,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:41:07" (1/1) ... [2020-12-22 07:41:07,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4778df5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:07, skipping insertion in model container [2020-12-22 07:41:07,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:41:07" (1/1) ... [2020-12-22 07:41:07,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:41:07,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:41:07,875 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/pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c[14467,14480] [2020-12-22 07:41:07,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:41:07,890 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:41:07,992 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/pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c[14467,14480] [2020-12-22 07:41:07,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:41:08,028 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:41:08,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08 WrapperNode [2020-12-22 07:41:08,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:41:08,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:41:08,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:41:08,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:41:08,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (1/1) ... [2020-12-22 07:41:08,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (1/1) ... [2020-12-22 07:41:08,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:41:08,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:41:08,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:41:08,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:41:08,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (1/1) ... [2020-12-22 07:41:08,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (1/1) ... [2020-12-22 07:41:08,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (1/1) ... [2020-12-22 07:41:08,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (1/1) ... [2020-12-22 07:41:08,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (1/1) ... [2020-12-22 07:41:08,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (1/1) ... [2020-12-22 07:41:08,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (1/1) ... [2020-12-22 07:41:08,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:41:08,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:41:08,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:41:08,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:41:08,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (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 07:41:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:41:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:41:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:41:08,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:41:09,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:41:09,228 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:41:09,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:41:09 BoogieIcfgContainer [2020-12-22 07:41:09,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:41:09,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:41:09,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:41:09,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:41:09,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:41:07" (1/3) ... [2020-12-22 07:41:09,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49157d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:41:09, skipping insertion in model container [2020-12-22 07:41:09,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:41:08" (2/3) ... [2020-12-22 07:41:09,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49157d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:41:09, skipping insertion in model container [2020-12-22 07:41:09,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:41:09" (3/3) ... [2020-12-22 07:41:09,240 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:41:09,247 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:41:09,252 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:41:09,271 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:41:09,300 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:41:09,301 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:41:09,301 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:41:09,301 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:41:09,301 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:41:09,301 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:41:09,302 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:41:09,302 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:41:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-12-22 07:41:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:41:09,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:09,332 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] [2020-12-22 07:41:09,333 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:09,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:09,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1418405445, now seen corresponding path program 1 times [2020-12-22 07:41:09,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:09,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154838124] [2020-12-22 07:41:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:09,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154838124] [2020-12-22 07:41:09,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:09,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:41:09,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434344602] [2020-12-22 07:41:09,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:41:09,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:09,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:41:09,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:41:09,702 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 2 states. [2020-12-22 07:41:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:09,737 INFO L93 Difference]: Finished difference Result 221 states and 383 transitions. [2020-12-22 07:41:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:41:09,738 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:41:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:09,763 INFO L225 Difference]: With dead ends: 221 [2020-12-22 07:41:09,763 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 07:41:09,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:41:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 07:41:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-12-22 07:41:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-22 07:41:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 240 transitions. [2020-12-22 07:41:09,828 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 240 transitions. Word has length 37 [2020-12-22 07:41:09,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:09,829 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 240 transitions. [2020-12-22 07:41:09,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:41:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 240 transitions. [2020-12-22 07:41:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:41:09,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:09,832 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] [2020-12-22 07:41:09,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:41:09,832 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2058913401, now seen corresponding path program 1 times [2020-12-22 07:41:09,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:09,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896991861] [2020-12-22 07:41:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:09,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896991861] [2020-12-22 07:41:09,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:09,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:09,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482754265] [2020-12-22 07:41:09,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:09,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:09,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:09,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:09,997 INFO L87 Difference]: Start difference. First operand 138 states and 240 transitions. Second operand 5 states. [2020-12-22 07:41:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:10,159 INFO L93 Difference]: Finished difference Result 220 states and 376 transitions. [2020-12-22 07:41:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:41:10,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:41:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:10,167 INFO L225 Difference]: With dead ends: 220 [2020-12-22 07:41:10,167 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 07:41:10,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:41:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 07:41:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-12-22 07:41:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-22 07:41:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 210 transitions. [2020-12-22 07:41:10,196 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 210 transitions. Word has length 37 [2020-12-22 07:41:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:10,196 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 210 transitions. [2020-12-22 07:41:10,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 210 transitions. [2020-12-22 07:41:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:41:10,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:10,202 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 07:41:10,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:41:10,203 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:10,203 INFO L82 PathProgramCache]: Analyzing trace with hash -415118785, now seen corresponding path program 1 times [2020-12-22 07:41:10,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:10,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585224474] [2020-12-22 07:41:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:10,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585224474] [2020-12-22 07:41:10,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:10,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:10,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655011770] [2020-12-22 07:41:10,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:10,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:10,375 INFO L87 Difference]: Start difference. First operand 138 states and 210 transitions. Second operand 3 states. [2020-12-22 07:41:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:10,429 INFO L93 Difference]: Finished difference Result 284 states and 456 transitions. [2020-12-22 07:41:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:10,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:41:10,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:10,432 INFO L225 Difference]: With dead ends: 284 [2020-12-22 07:41:10,432 INFO L226 Difference]: Without dead ends: 206 [2020-12-22 07:41:10,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-22 07:41:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-12-22 07:41:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-22 07:41:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 318 transitions. [2020-12-22 07:41:10,450 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 318 transitions. Word has length 66 [2020-12-22 07:41:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:10,451 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 318 transitions. [2020-12-22 07:41:10,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 318 transitions. [2020-12-22 07:41:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:41:10,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:10,454 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 07:41:10,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:41:10,455 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 928134868, now seen corresponding path program 1 times [2020-12-22 07:41:10,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:10,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181657662] [2020-12-22 07:41:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:10,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181657662] [2020-12-22 07:41:10,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:10,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:10,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900131162] [2020-12-22 07:41:10,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:10,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:10,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:10,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:10,561 INFO L87 Difference]: Start difference. First operand 204 states and 318 transitions. Second operand 3 states. [2020-12-22 07:41:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:10,599 INFO L93 Difference]: Finished difference Result 476 states and 770 transitions. [2020-12-22 07:41:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:10,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:41:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:10,604 INFO L225 Difference]: With dead ends: 476 [2020-12-22 07:41:10,604 INFO L226 Difference]: Without dead ends: 332 [2020-12-22 07:41:10,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:10,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-12-22 07:41:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2020-12-22 07:41:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-12-22 07:41:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 527 transitions. [2020-12-22 07:41:10,661 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 527 transitions. Word has length 68 [2020-12-22 07:41:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:10,662 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 527 transitions. [2020-12-22 07:41:10,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 527 transitions. [2020-12-22 07:41:10,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:41:10,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:10,670 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 07:41:10,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:41:10,671 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1295175881, now seen corresponding path program 1 times [2020-12-22 07:41:10,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:10,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583385414] [2020-12-22 07:41:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:10,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583385414] [2020-12-22 07:41:10,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:10,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:10,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125315350] [2020-12-22 07:41:10,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:10,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:10,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:10,842 INFO L87 Difference]: Start difference. First operand 330 states and 527 transitions. Second operand 3 states. [2020-12-22 07:41:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:10,913 INFO L93 Difference]: Finished difference Result 838 states and 1369 transitions. [2020-12-22 07:41:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:10,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:41:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:10,920 INFO L225 Difference]: With dead ends: 838 [2020-12-22 07:41:10,920 INFO L226 Difference]: Without dead ends: 568 [2020-12-22 07:41:10,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-12-22 07:41:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 566. [2020-12-22 07:41:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-12-22 07:41:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 915 transitions. [2020-12-22 07:41:10,979 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 915 transitions. Word has length 70 [2020-12-22 07:41:10,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:10,980 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 915 transitions. [2020-12-22 07:41:10,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:10,981 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 915 transitions. [2020-12-22 07:41:10,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:41:10,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:10,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:10,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:41:10,988 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:10,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:10,988 INFO L82 PathProgramCache]: Analyzing trace with hash -367652834, now seen corresponding path program 1 times [2020-12-22 07:41:10,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:10,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344294437] [2020-12-22 07:41:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:11,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344294437] [2020-12-22 07:41:11,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:11,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:11,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152195017] [2020-12-22 07:41:11,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:11,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:11,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:11,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:11,232 INFO L87 Difference]: Start difference. First operand 566 states and 915 transitions. Second operand 5 states. [2020-12-22 07:41:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:11,427 INFO L93 Difference]: Finished difference Result 2144 states and 3560 transitions. [2020-12-22 07:41:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:41:11,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:41:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:11,437 INFO L225 Difference]: With dead ends: 2144 [2020-12-22 07:41:11,438 INFO L226 Difference]: Without dead ends: 1638 [2020-12-22 07:41:11,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:41:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2020-12-22 07:41:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1008. [2020-12-22 07:41:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1008 states. [2020-12-22 07:41:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1646 transitions. [2020-12-22 07:41:11,490 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1646 transitions. Word has length 72 [2020-12-22 07:41:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:11,491 INFO L481 AbstractCegarLoop]: Abstraction has 1008 states and 1646 transitions. [2020-12-22 07:41:11,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1646 transitions. [2020-12-22 07:41:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:41:11,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:11,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:11,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:41:11,496 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:11,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:11,498 INFO L82 PathProgramCache]: Analyzing trace with hash -435168554, now seen corresponding path program 1 times [2020-12-22 07:41:11,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:11,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318229] [2020-12-22 07:41:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:11,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318229] [2020-12-22 07:41:11,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:11,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:11,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010883123] [2020-12-22 07:41:11,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:11,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:11,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:11,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:11,605 INFO L87 Difference]: Start difference. First operand 1008 states and 1646 transitions. Second operand 4 states. [2020-12-22 07:41:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:11,741 INFO L93 Difference]: Finished difference Result 2928 states and 4854 transitions. [2020-12-22 07:41:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:11,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:41:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:11,754 INFO L225 Difference]: With dead ends: 2928 [2020-12-22 07:41:11,754 INFO L226 Difference]: Without dead ends: 1980 [2020-12-22 07:41:11,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2020-12-22 07:41:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1485. [2020-12-22 07:41:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1485 states. [2020-12-22 07:41:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2437 transitions. [2020-12-22 07:41:11,827 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2437 transitions. Word has length 73 [2020-12-22 07:41:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:11,827 INFO L481 AbstractCegarLoop]: Abstraction has 1485 states and 2437 transitions. [2020-12-22 07:41:11,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2437 transitions. [2020-12-22 07:41:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:41:11,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:11,830 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, 1, 1, 1] [2020-12-22 07:41:11,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:41:11,830 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:11,831 INFO L82 PathProgramCache]: Analyzing trace with hash 152415701, now seen corresponding path program 1 times [2020-12-22 07:41:11,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:11,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123032279] [2020-12-22 07:41:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:11,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123032279] [2020-12-22 07:41:11,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:11,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:11,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626907383] [2020-12-22 07:41:11,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:11,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:11,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:11,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:11,888 INFO L87 Difference]: Start difference. First operand 1485 states and 2437 transitions. Second operand 3 states. [2020-12-22 07:41:11,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:11,965 INFO L93 Difference]: Finished difference Result 2927 states and 4822 transitions. [2020-12-22 07:41:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:11,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:41:11,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:11,978 INFO L225 Difference]: With dead ends: 2927 [2020-12-22 07:41:11,979 INFO L226 Difference]: Without dead ends: 2113 [2020-12-22 07:41:11,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2020-12-22 07:41:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2111. [2020-12-22 07:41:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2111 states. [2020-12-22 07:41:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3450 transitions. [2020-12-22 07:41:12,074 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3450 transitions. Word has length 74 [2020-12-22 07:41:12,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:12,075 INFO L481 AbstractCegarLoop]: Abstraction has 2111 states and 3450 transitions. [2020-12-22 07:41:12,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3450 transitions. [2020-12-22 07:41:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:41:12,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:12,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:12,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:41:12,077 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1935815765, now seen corresponding path program 1 times [2020-12-22 07:41:12,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:12,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832813907] [2020-12-22 07:41:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:12,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832813907] [2020-12-22 07:41:12,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:12,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:12,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027766908] [2020-12-22 07:41:12,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:12,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:12,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:12,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:12,204 INFO L87 Difference]: Start difference. First operand 2111 states and 3450 transitions. Second operand 4 states. [2020-12-22 07:41:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:12,425 INFO L93 Difference]: Finished difference Result 6540 states and 10757 transitions. [2020-12-22 07:41:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:12,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:41:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:12,455 INFO L225 Difference]: With dead ends: 6540 [2020-12-22 07:41:12,456 INFO L226 Difference]: Without dead ends: 4519 [2020-12-22 07:41:12,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2020-12-22 07:41:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 3303. [2020-12-22 07:41:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3303 states. [2020-12-22 07:41:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 5388 transitions. [2020-12-22 07:41:12,745 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 5388 transitions. Word has length 74 [2020-12-22 07:41:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:12,746 INFO L481 AbstractCegarLoop]: Abstraction has 3303 states and 5388 transitions. [2020-12-22 07:41:12,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 5388 transitions. [2020-12-22 07:41:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:41:12,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:12,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:12,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:41:12,748 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2130170379, now seen corresponding path program 1 times [2020-12-22 07:41:12,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:12,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880069326] [2020-12-22 07:41:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:12,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880069326] [2020-12-22 07:41:12,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:12,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:12,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69418103] [2020-12-22 07:41:12,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:12,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:12,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:12,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:12,823 INFO L87 Difference]: Start difference. First operand 3303 states and 5388 transitions. Second operand 3 states. [2020-12-22 07:41:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:12,994 INFO L93 Difference]: Finished difference Result 6575 states and 10748 transitions. [2020-12-22 07:41:12,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:12,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:41:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:13,022 INFO L225 Difference]: With dead ends: 6575 [2020-12-22 07:41:13,023 INFO L226 Difference]: Without dead ends: 4693 [2020-12-22 07:41:13,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2020-12-22 07:41:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 4691. [2020-12-22 07:41:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4691 states. [2020-12-22 07:41:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7606 transitions. [2020-12-22 07:41:13,311 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7606 transitions. Word has length 74 [2020-12-22 07:41:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:13,311 INFO L481 AbstractCegarLoop]: Abstraction has 4691 states and 7606 transitions. [2020-12-22 07:41:13,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7606 transitions. [2020-12-22 07:41:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:41:13,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:13,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:13,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:41:13,314 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash 339461557, now seen corresponding path program 1 times [2020-12-22 07:41:13,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:13,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353695320] [2020-12-22 07:41:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:13,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353695320] [2020-12-22 07:41:13,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:13,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:13,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075974135] [2020-12-22 07:41:13,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:13,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:13,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:13,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:13,383 INFO L87 Difference]: Start difference. First operand 4691 states and 7606 transitions. Second operand 3 states. [2020-12-22 07:41:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:13,718 INFO L93 Difference]: Finished difference Result 10288 states and 16845 transitions. [2020-12-22 07:41:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:13,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:41:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:13,790 INFO L225 Difference]: With dead ends: 10288 [2020-12-22 07:41:13,790 INFO L226 Difference]: Without dead ends: 6938 [2020-12-22 07:41:13,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:13,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2020-12-22 07:41:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 6936. [2020-12-22 07:41:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6936 states. [2020-12-22 07:41:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 11234 transitions. [2020-12-22 07:41:14,223 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 11234 transitions. Word has length 74 [2020-12-22 07:41:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:14,223 INFO L481 AbstractCegarLoop]: Abstraction has 6936 states and 11234 transitions. [2020-12-22 07:41:14,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 11234 transitions. [2020-12-22 07:41:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:41:14,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:14,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:14,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:41:14,225 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:14,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1704077331, now seen corresponding path program 1 times [2020-12-22 07:41:14,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:14,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824342572] [2020-12-22 07:41:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:14,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824342572] [2020-12-22 07:41:14,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:14,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:14,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181603711] [2020-12-22 07:41:14,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:14,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:14,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:14,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:14,346 INFO L87 Difference]: Start difference. First operand 6936 states and 11234 transitions. Second operand 4 states. [2020-12-22 07:41:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:15,058 INFO L93 Difference]: Finished difference Result 21738 states and 35298 transitions. [2020-12-22 07:41:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:15,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:41:15,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:15,105 INFO L225 Difference]: With dead ends: 21738 [2020-12-22 07:41:15,105 INFO L226 Difference]: Without dead ends: 14888 [2020-12-22 07:41:15,118 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 07:41:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2020-12-22 07:41:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 10869. [2020-12-22 07:41:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10869 states. [2020-12-22 07:41:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10869 states to 10869 states and 17501 transitions. [2020-12-22 07:41:15,752 INFO L78 Accepts]: Start accepts. Automaton has 10869 states and 17501 transitions. Word has length 75 [2020-12-22 07:41:15,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:15,752 INFO L481 AbstractCegarLoop]: Abstraction has 10869 states and 17501 transitions. [2020-12-22 07:41:15,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 10869 states and 17501 transitions. [2020-12-22 07:41:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:41:15,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:15,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:15,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:41:15,754 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:15,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:15,755 INFO L82 PathProgramCache]: Analyzing trace with hash 931672261, now seen corresponding path program 1 times [2020-12-22 07:41:15,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:15,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590893772] [2020-12-22 07:41:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:15,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590893772] [2020-12-22 07:41:15,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:15,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:15,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233099005] [2020-12-22 07:41:15,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:15,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:15,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:15,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:15,875 INFO L87 Difference]: Start difference. First operand 10869 states and 17501 transitions. Second operand 4 states. [2020-12-22 07:41:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:16,875 INFO L93 Difference]: Finished difference Result 32102 states and 51631 transitions. [2020-12-22 07:41:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:16,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-12-22 07:41:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:16,932 INFO L225 Difference]: With dead ends: 32102 [2020-12-22 07:41:16,932 INFO L226 Difference]: Without dead ends: 21242 [2020-12-22 07:41:16,955 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 07:41:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21242 states. [2020-12-22 07:41:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21242 to 21240. [2020-12-22 07:41:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21240 states. [2020-12-22 07:41:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21240 states to 21240 states and 33918 transitions. [2020-12-22 07:41:18,009 INFO L78 Accepts]: Start accepts. Automaton has 21240 states and 33918 transitions. Word has length 77 [2020-12-22 07:41:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:18,010 INFO L481 AbstractCegarLoop]: Abstraction has 21240 states and 33918 transitions. [2020-12-22 07:41:18,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 21240 states and 33918 transitions. [2020-12-22 07:41:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:41:18,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:18,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:18,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:41:18,011 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:18,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:18,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1466579386, now seen corresponding path program 1 times [2020-12-22 07:41:18,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:18,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208041497] [2020-12-22 07:41:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:18,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208041497] [2020-12-22 07:41:18,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:18,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:18,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130644281] [2020-12-22 07:41:18,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:18,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:18,063 INFO L87 Difference]: Start difference. First operand 21240 states and 33918 transitions. Second operand 3 states. [2020-12-22 07:41:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:19,223 INFO L93 Difference]: Finished difference Result 51507 states and 82750 transitions. [2020-12-22 07:41:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:19,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:41:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:19,304 INFO L225 Difference]: With dead ends: 51507 [2020-12-22 07:41:19,304 INFO L226 Difference]: Without dead ends: 30396 [2020-12-22 07:41:19,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30396 states. [2020-12-22 07:41:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30396 to 29484. [2020-12-22 07:41:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29484 states. [2020-12-22 07:41:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29484 states to 29484 states and 46959 transitions. [2020-12-22 07:41:20,604 INFO L78 Accepts]: Start accepts. Automaton has 29484 states and 46959 transitions. Word has length 78 [2020-12-22 07:41:20,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:20,605 INFO L481 AbstractCegarLoop]: Abstraction has 29484 states and 46959 transitions. [2020-12-22 07:41:20,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 29484 states and 46959 transitions. [2020-12-22 07:41:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:41:20,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:20,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:20,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:41:20,607 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:20,608 INFO L82 PathProgramCache]: Analyzing trace with hash 295226641, now seen corresponding path program 1 times [2020-12-22 07:41:20,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:20,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310955259] [2020-12-22 07:41:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:20,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310955259] [2020-12-22 07:41:20,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:20,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:20,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392319114] [2020-12-22 07:41:20,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:20,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:20,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:20,650 INFO L87 Difference]: Start difference. First operand 29484 states and 46959 transitions. Second operand 3 states. [2020-12-22 07:41:22,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:22,445 INFO L93 Difference]: Finished difference Result 88414 states and 140815 transitions. [2020-12-22 07:41:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:22,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:41:22,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:22,623 INFO L225 Difference]: With dead ends: 88414 [2020-12-22 07:41:22,623 INFO L226 Difference]: Without dead ends: 58958 [2020-12-22 07:41:22,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2020-12-22 07:41:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 29486. [2020-12-22 07:41:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29486 states. [2020-12-22 07:41:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29486 states to 29486 states and 46961 transitions. [2020-12-22 07:41:24,195 INFO L78 Accepts]: Start accepts. Automaton has 29486 states and 46961 transitions. Word has length 78 [2020-12-22 07:41:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:24,196 INFO L481 AbstractCegarLoop]: Abstraction has 29486 states and 46961 transitions. [2020-12-22 07:41:24,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 29486 states and 46961 transitions. [2020-12-22 07:41:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:41:24,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:24,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:24,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:41:24,197 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:24,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:24,198 INFO L82 PathProgramCache]: Analyzing trace with hash -57061967, now seen corresponding path program 1 times [2020-12-22 07:41:24,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:24,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066935044] [2020-12-22 07:41:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:24,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066935044] [2020-12-22 07:41:24,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:24,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:24,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262712198] [2020-12-22 07:41:24,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:24,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:24,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:24,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:24,293 INFO L87 Difference]: Start difference. First operand 29486 states and 46961 transitions. Second operand 4 states. [2020-12-22 07:41:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:26,002 INFO L93 Difference]: Finished difference Result 87100 states and 138561 transitions. [2020-12-22 07:41:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:26,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 07:41:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:26,110 INFO L225 Difference]: With dead ends: 87100 [2020-12-22 07:41:26,111 INFO L226 Difference]: Without dead ends: 57644 [2020-12-22 07:41:26,145 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 07:41:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57644 states. [2020-12-22 07:41:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57644 to 57642. [2020-12-22 07:41:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57642 states. [2020-12-22 07:41:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57642 states to 57642 states and 91088 transitions. [2020-12-22 07:41:28,499 INFO L78 Accepts]: Start accepts. Automaton has 57642 states and 91088 transitions. Word has length 79 [2020-12-22 07:41:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:28,500 INFO L481 AbstractCegarLoop]: Abstraction has 57642 states and 91088 transitions. [2020-12-22 07:41:28,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 57642 states and 91088 transitions. [2020-12-22 07:41:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:41:28,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:28,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:28,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:41:28,502 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:28,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1163177193, now seen corresponding path program 1 times [2020-12-22 07:41:28,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:28,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485700959] [2020-12-22 07:41:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:28,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485700959] [2020-12-22 07:41:28,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:28,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:28,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49084797] [2020-12-22 07:41:28,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:28,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:28,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:28,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:28,563 INFO L87 Difference]: Start difference. First operand 57642 states and 91088 transitions. Second operand 3 states. [2020-12-22 07:41:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:31,062 INFO L93 Difference]: Finished difference Result 139442 states and 221184 transitions. [2020-12-22 07:41:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:31,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:41:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:31,198 INFO L225 Difference]: With dead ends: 139442 [2020-12-22 07:41:31,198 INFO L226 Difference]: Without dead ends: 82080 [2020-12-22 07:41:31,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82080 states. [2020-12-22 07:41:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82080 to 79774. [2020-12-22 07:41:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79774 states. [2020-12-22 07:41:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79774 states to 79774 states and 125478 transitions. [2020-12-22 07:41:34,395 INFO L78 Accepts]: Start accepts. Automaton has 79774 states and 125478 transitions. Word has length 80 [2020-12-22 07:41:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:34,395 INFO L481 AbstractCegarLoop]: Abstraction has 79774 states and 125478 transitions. [2020-12-22 07:41:34,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 79774 states and 125478 transitions. [2020-12-22 07:41:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:41:34,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:34,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:34,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:41:34,397 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:34,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:34,398 INFO L82 PathProgramCache]: Analyzing trace with hash -544448643, now seen corresponding path program 1 times [2020-12-22 07:41:34,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:34,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83015678] [2020-12-22 07:41:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:34,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83015678] [2020-12-22 07:41:34,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:34,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:34,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346358383] [2020-12-22 07:41:34,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:34,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:34,441 INFO L87 Difference]: Start difference. First operand 79774 states and 125478 transitions. Second operand 3 states. [2020-12-22 07:41:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:39,160 INFO L93 Difference]: Finished difference Result 239246 states and 376314 transitions. [2020-12-22 07:41:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:39,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:41:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:39,441 INFO L225 Difference]: With dead ends: 239246 [2020-12-22 07:41:39,442 INFO L226 Difference]: Without dead ends: 159516 [2020-12-22 07:41:39,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159516 states. [2020-12-22 07:41:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159516 to 79778. [2020-12-22 07:41:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79778 states. [2020-12-22 07:41:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79778 states to 79778 states and 125482 transitions. [2020-12-22 07:41:43,651 INFO L78 Accepts]: Start accepts. Automaton has 79778 states and 125482 transitions. Word has length 80 [2020-12-22 07:41:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:43,651 INFO L481 AbstractCegarLoop]: Abstraction has 79778 states and 125482 transitions. [2020-12-22 07:41:43,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 79778 states and 125482 transitions. [2020-12-22 07:41:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:41:43,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:43,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:43,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:41:43,653 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:43,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2051256477, now seen corresponding path program 1 times [2020-12-22 07:41:43,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:43,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693751135] [2020-12-22 07:41:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:43,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693751135] [2020-12-22 07:41:43,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:43,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:43,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275884635] [2020-12-22 07:41:43,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:43,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:43,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:43,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:43,794 INFO L87 Difference]: Start difference. First operand 79778 states and 125482 transitions. Second operand 4 states. [2020-12-22 07:41:49,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:49,557 INFO L93 Difference]: Finished difference Result 235586 states and 370042 transitions. [2020-12-22 07:41:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:49,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 07:41:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:49,817 INFO L225 Difference]: With dead ends: 235586 [2020-12-22 07:41:49,817 INFO L226 Difference]: Without dead ends: 155856 [2020-12-22 07:41:49,888 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 07:41:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155856 states. [2020-12-22 07:41:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155856 to 155854. [2020-12-22 07:41:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155854 states. [2020-12-22 07:41:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155854 states to 155854 states and 243064 transitions. [2020-12-22 07:41:56,444 INFO L78 Accepts]: Start accepts. Automaton has 155854 states and 243064 transitions. Word has length 81 [2020-12-22 07:41:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:56,444 INFO L481 AbstractCegarLoop]: Abstraction has 155854 states and 243064 transitions. [2020-12-22 07:41:56,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 155854 states and 243064 transitions. [2020-12-22 07:41:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:41:56,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:56,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:56,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:41:56,462 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:56,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:56,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2106822348, now seen corresponding path program 1 times [2020-12-22 07:41:56,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:56,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058627185] [2020-12-22 07:41:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:56,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058627185] [2020-12-22 07:41:56,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:56,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:56,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830629932] [2020-12-22 07:41:56,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:56,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:56,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:56,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:56,532 INFO L87 Difference]: Start difference. First operand 155854 states and 243064 transitions. Second operand 3 states. [2020-12-22 07:42:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:04,420 INFO L93 Difference]: Finished difference Result 377802 states and 592138 transitions. [2020-12-22 07:42:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:04,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:42:04,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:04,874 INFO L225 Difference]: With dead ends: 377802 [2020-12-22 07:42:04,874 INFO L226 Difference]: Without dead ends: 222512 [2020-12-22 07:42:04,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222512 states. [2020-12-22 07:42:13,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222512 to 215310. [2020-12-22 07:42:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215310 states. [2020-12-22 07:42:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215310 states to 215310 states and 333632 transitions. [2020-12-22 07:42:14,200 INFO L78 Accepts]: Start accepts. Automaton has 215310 states and 333632 transitions. Word has length 82 [2020-12-22 07:42:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:14,200 INFO L481 AbstractCegarLoop]: Abstraction has 215310 states and 333632 transitions. [2020-12-22 07:42:14,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 215310 states and 333632 transitions. [2020-12-22 07:42:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:42:14,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:14,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:14,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:42:14,202 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash -565045271, now seen corresponding path program 1 times [2020-12-22 07:42:14,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:14,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039677747] [2020-12-22 07:42:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:42:14,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039677747] [2020-12-22 07:42:14,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:14,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:14,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042945625] [2020-12-22 07:42:14,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:14,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:14,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:14,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:14,244 INFO L87 Difference]: Start difference. First operand 215310 states and 333632 transitions. Second operand 3 states. [2020-12-22 07:42:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:29,778 INFO L93 Difference]: Finished difference Result 645506 states and 1000350 transitions. [2020-12-22 07:42:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:29,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:42:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:30,650 INFO L225 Difference]: With dead ends: 645506 [2020-12-22 07:42:30,651 INFO L226 Difference]: Without dead ends: 430528 [2020-12-22 07:42:30,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430528 states. [2020-12-22 07:42:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430528 to 215318. [2020-12-22 07:42:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215318 states. [2020-12-22 07:42:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215318 states to 215318 states and 333640 transitions. [2020-12-22 07:42:42,761 INFO L78 Accepts]: Start accepts. Automaton has 215318 states and 333640 transitions. Word has length 82 [2020-12-22 07:42:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:42,761 INFO L481 AbstractCegarLoop]: Abstraction has 215318 states and 333640 transitions. [2020-12-22 07:42:42,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 215318 states and 333640 transitions. [2020-12-22 07:42:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:42:42,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:42,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:42,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:42:42,770 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:42,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1283476260, now seen corresponding path program 1 times [2020-12-22 07:42:42,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:42,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67861313] [2020-12-22 07:42:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:42:42,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67861313] [2020-12-22 07:42:42,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:42,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:42:42,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382046473] [2020-12-22 07:42:42,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:42:42,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:42,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:42:42,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:42,932 INFO L87 Difference]: Start difference. First operand 215318 states and 333640 transitions. Second operand 5 states. [2020-12-22 07:43:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:00,015 INFO L93 Difference]: Finished difference Result 608320 states and 942049 transitions. [2020-12-22 07:43:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:00,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 07:43:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:00,822 INFO L225 Difference]: With dead ends: 608320 [2020-12-22 07:43:00,822 INFO L226 Difference]: Without dead ends: 393090 [2020-12-22 07:43:01,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393090 states. [2020-12-22 07:43:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393090 to 393088. [2020-12-22 07:43:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393088 states. [2020-12-22 07:43:20,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393088 states to 393088 states and 603553 transitions. [2020-12-22 07:43:20,180 INFO L78 Accepts]: Start accepts. Automaton has 393088 states and 603553 transitions. Word has length 83 [2020-12-22 07:43:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:20,181 INFO L481 AbstractCegarLoop]: Abstraction has 393088 states and 603553 transitions. [2020-12-22 07:43:20,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:43:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 393088 states and 603553 transitions. [2020-12-22 07:43:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:43:20,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:20,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:20,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:43:20,185 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:20,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:20,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2141300343, now seen corresponding path program 1 times [2020-12-22 07:43:20,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:20,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710698042] [2020-12-22 07:43:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:20,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710698042] [2020-12-22 07:43:20,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:20,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:20,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266137430] [2020-12-22 07:43:20,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:20,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:20,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:20,336 INFO L87 Difference]: Start difference. First operand 393088 states and 603553 transitions. Second operand 4 states. [2020-12-22 07:43:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:34,710 INFO L93 Difference]: Finished difference Result 699170 states and 1071499 transitions. [2020-12-22 07:43:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:34,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:43:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:35,305 INFO L225 Difference]: With dead ends: 699170 [2020-12-22 07:43:35,306 INFO L226 Difference]: Without dead ends: 306156 [2020-12-22 07:43:35,557 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 07:43:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306156 states. [2020-12-22 07:43:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306156 to 306156. [2020-12-22 07:43:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306156 states. [2020-12-22 07:43:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306156 states to 306156 states and 468049 transitions. [2020-12-22 07:43:50,440 INFO L78 Accepts]: Start accepts. Automaton has 306156 states and 468049 transitions. Word has length 83 [2020-12-22 07:43:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:50,440 INFO L481 AbstractCegarLoop]: Abstraction has 306156 states and 468049 transitions. [2020-12-22 07:43:50,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 306156 states and 468049 transitions. [2020-12-22 07:43:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:43:50,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:50,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:50,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:43:50,453 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:50,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1610663161, now seen corresponding path program 1 times [2020-12-22 07:43:50,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:50,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959416741] [2020-12-22 07:43:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:50,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959416741] [2020-12-22 07:43:50,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:50,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:50,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999611963] [2020-12-22 07:43:50,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:50,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:50,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:50,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:50,572 INFO L87 Difference]: Start difference. First operand 306156 states and 468049 transitions. Second operand 4 states. [2020-12-22 07:44:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:14,998 INFO L93 Difference]: Finished difference Result 804284 states and 1228518 transitions. [2020-12-22 07:44:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:14,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 07:44:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:16,101 INFO L225 Difference]: With dead ends: 804284 [2020-12-22 07:44:16,102 INFO L226 Difference]: Without dead ends: 498260 [2020-12-22 07:44:16,386 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 07:44:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498260 states. [2020-12-22 07:44:40,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498260 to 498258. [2020-12-22 07:44:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498258 states. [2020-12-22 07:44:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498258 states to 498258 states and 753399 transitions. [2020-12-22 07:44:42,089 INFO L78 Accepts]: Start accepts. Automaton has 498258 states and 753399 transitions. Word has length 84 [2020-12-22 07:44:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:42,089 INFO L481 AbstractCegarLoop]: Abstraction has 498258 states and 753399 transitions. [2020-12-22 07:44:42,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 498258 states and 753399 transitions. [2020-12-22 07:44:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 07:44:42,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:42,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:42,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:44:42,118 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:42,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1246615136, now seen corresponding path program 1 times [2020-12-22 07:44:42,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:42,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137499671] [2020-12-22 07:44:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:44:42,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137499671] [2020-12-22 07:44:42,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:42,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:42,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250316983] [2020-12-22 07:44:42,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:42,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:42,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:42,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:42,253 INFO L87 Difference]: Start difference. First operand 498258 states and 753399 transitions. Second operand 4 states.