/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:25:45,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:25:45,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:25:45,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:25:45,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:25:45,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:25:45,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:25:45,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:25:45,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:25:45,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:25:45,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:25:45,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:25:45,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:25:45,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:25:45,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:25:45,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:25:45,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:25:45,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:25:45,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:25:45,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:25:45,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:25:45,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:25:45,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:25:45,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:25:45,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:25:46,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:25:46,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:25:46,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:25:46,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:25:46,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:25:46,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:25:46,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:25:46,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:25:46,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:25:46,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:25:46,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:25:46,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:25:46,075 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:25:46,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:25:46,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:25:46,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:25:46,080 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:25:46,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:25:46,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:25:46,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:25:46,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:25:46,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:25:46,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:25:46,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:25:46,083 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:25:46,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:25:46,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:25:46,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:25:46,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:25:46,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:25:46,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:25:46,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:25:46,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:25:46,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:25:46,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:25:46,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:25:46,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:25:46,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:25:46,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:25:46,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:25:46,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:25:46,527 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:25:46,528 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:25:46,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:25:46,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbfb0629/ff4346537ec14522ad567aac5ed680f6/FLAGa2b8529ce [2020-12-22 08:25:47,330 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:25:47,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:25:47,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbfb0629/ff4346537ec14522ad567aac5ed680f6/FLAGa2b8529ce [2020-12-22 08:25:47,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbfb0629/ff4346537ec14522ad567aac5ed680f6 [2020-12-22 08:25:47,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:25:47,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:25:47,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:25:47,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:25:47,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:25:47,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:25:47" (1/1) ... [2020-12-22 08:25:47,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408d5434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:47, skipping insertion in model container [2020-12-22 08:25:47,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:25:47" (1/1) ... [2020-12-22 08:25:47,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:25:47,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:25:47,910 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4971,4984] [2020-12-22 08:25:47,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:25:47,979 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:25:48,019 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4971,4984] [2020-12-22 08:25:48,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:25:48,070 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:25:48,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48 WrapperNode [2020-12-22 08:25:48,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:25:48,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:25:48,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:25:48,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:25:48,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (1/1) ... [2020-12-22 08:25:48,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (1/1) ... [2020-12-22 08:25:48,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:25:48,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:25:48,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:25:48,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:25:48,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (1/1) ... [2020-12-22 08:25:48,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (1/1) ... [2020-12-22 08:25:48,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (1/1) ... [2020-12-22 08:25:48,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (1/1) ... [2020-12-22 08:25:48,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (1/1) ... [2020-12-22 08:25:48,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (1/1) ... [2020-12-22 08:25:48,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (1/1) ... [2020-12-22 08:25:48,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:25:48,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:25:48,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:25:48,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:25:48,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (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 08:25:48,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:25:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:25:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:25:48,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:25:49,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:25:49,042 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:25:49,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:25:49 BoogieIcfgContainer [2020-12-22 08:25:49,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:25:49,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:25:49,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:25:49,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:25:49,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:25:47" (1/3) ... [2020-12-22 08:25:49,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b97b84e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:25:49, skipping insertion in model container [2020-12-22 08:25:49,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:25:48" (2/3) ... [2020-12-22 08:25:49,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b97b84e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:25:49, skipping insertion in model container [2020-12-22 08:25:49,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:25:49" (3/3) ... [2020-12-22 08:25:49,054 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:25:49,061 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:25:49,067 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:25:49,087 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:25:49,116 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:25:49,117 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:25:49,117 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:25:49,117 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:25:49,117 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:25:49,117 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:25:49,117 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:25:49,118 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:25:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states. [2020-12-22 08:25:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:25:49,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:49,145 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] [2020-12-22 08:25:49,145 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2117585175, now seen corresponding path program 1 times [2020-12-22 08:25:49,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:49,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200131812] [2020-12-22 08:25:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:49,575 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 08:25:49,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200131812] [2020-12-22 08:25:49,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:49,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:49,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510573871] [2020-12-22 08:25:49,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:49,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:49,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:49,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:49,601 INFO L87 Difference]: Start difference. First operand 112 states. Second operand 3 states. [2020-12-22 08:25:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:49,685 INFO L93 Difference]: Finished difference Result 266 states and 425 transitions. [2020-12-22 08:25:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:49,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:25:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:49,701 INFO L225 Difference]: With dead ends: 266 [2020-12-22 08:25:49,701 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 08:25:49,705 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 08:25:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 08:25:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-12-22 08:25:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-22 08:25:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 259 transitions. [2020-12-22 08:25:49,777 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 259 transitions. Word has length 49 [2020-12-22 08:25:49,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:49,778 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 259 transitions. [2020-12-22 08:25:49,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 259 transitions. [2020-12-22 08:25:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:25:49,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:49,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:49,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:25:49,781 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:49,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1419109229, now seen corresponding path program 1 times [2020-12-22 08:25:49,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:49,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186018242] [2020-12-22 08:25:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:49,918 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 08:25:49,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186018242] [2020-12-22 08:25:49,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:49,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:49,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543748285] [2020-12-22 08:25:49,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:49,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:49,924 INFO L87 Difference]: Start difference. First operand 173 states and 259 transitions. Second operand 3 states. [2020-12-22 08:25:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:50,014 INFO L93 Difference]: Finished difference Result 433 states and 671 transitions. [2020-12-22 08:25:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:50,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:25:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:50,021 INFO L225 Difference]: With dead ends: 433 [2020-12-22 08:25:50,022 INFO L226 Difference]: Without dead ends: 287 [2020-12-22 08:25:50,026 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 08:25:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-22 08:25:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2020-12-22 08:25:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-22 08:25:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 436 transitions. [2020-12-22 08:25:50,084 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 436 transitions. Word has length 50 [2020-12-22 08:25:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:50,085 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 436 transitions. [2020-12-22 08:25:50,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 436 transitions. [2020-12-22 08:25:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:25:50,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:50,088 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] [2020-12-22 08:25:50,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:25:50,088 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:50,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1570665396, now seen corresponding path program 1 times [2020-12-22 08:25:50,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:50,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085952122] [2020-12-22 08:25:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:50,211 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 08:25:50,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085952122] [2020-12-22 08:25:50,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:50,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:50,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398675137] [2020-12-22 08:25:50,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:50,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:50,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:50,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:50,214 INFO L87 Difference]: Start difference. First operand 285 states and 436 transitions. Second operand 3 states. [2020-12-22 08:25:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:50,275 INFO L93 Difference]: Finished difference Result 737 states and 1150 transitions. [2020-12-22 08:25:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:50,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 08:25:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:50,279 INFO L225 Difference]: With dead ends: 737 [2020-12-22 08:25:50,279 INFO L226 Difference]: Without dead ends: 479 [2020-12-22 08:25:50,281 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 08:25:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-12-22 08:25:50,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2020-12-22 08:25:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-12-22 08:25:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 736 transitions. [2020-12-22 08:25:50,335 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 736 transitions. Word has length 51 [2020-12-22 08:25:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:50,335 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 736 transitions. [2020-12-22 08:25:50,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 736 transitions. [2020-12-22 08:25:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:25:50,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:50,341 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] [2020-12-22 08:25:50,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:25:50,341 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1205622842, now seen corresponding path program 1 times [2020-12-22 08:25:50,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:50,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592981077] [2020-12-22 08:25:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:50,551 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 08:25:50,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592981077] [2020-12-22 08:25:50,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:50,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:25:50,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217315000] [2020-12-22 08:25:50,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:50,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:50,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:50,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:50,555 INFO L87 Difference]: Start difference. First operand 477 states and 736 transitions. Second operand 6 states. [2020-12-22 08:25:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:50,829 INFO L93 Difference]: Finished difference Result 2033 states and 3172 transitions. [2020-12-22 08:25:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:25:50,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 08:25:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:50,843 INFO L225 Difference]: With dead ends: 2033 [2020-12-22 08:25:50,844 INFO L226 Difference]: Without dead ends: 1583 [2020-12-22 08:25:50,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2020-12-22 08:25:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1577. [2020-12-22 08:25:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1577 states. [2020-12-22 08:25:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2452 transitions. [2020-12-22 08:25:51,002 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2452 transitions. Word has length 52 [2020-12-22 08:25:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:51,002 INFO L481 AbstractCegarLoop]: Abstraction has 1577 states and 2452 transitions. [2020-12-22 08:25:51,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2452 transitions. [2020-12-22 08:25:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:25:51,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:51,011 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] [2020-12-22 08:25:51,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:25:51,012 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1744489678, now seen corresponding path program 1 times [2020-12-22 08:25:51,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:51,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022133043] [2020-12-22 08:25:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:51,116 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 08:25:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022133043] [2020-12-22 08:25:51,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:51,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:51,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370883690] [2020-12-22 08:25:51,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:51,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:51,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:51,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:51,121 INFO L87 Difference]: Start difference. First operand 1577 states and 2452 transitions. Second operand 3 states. [2020-12-22 08:25:51,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:51,340 INFO L93 Difference]: Finished difference Result 4141 states and 6438 transitions. [2020-12-22 08:25:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:51,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 08:25:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:51,360 INFO L225 Difference]: With dead ends: 4141 [2020-12-22 08:25:51,361 INFO L226 Difference]: Without dead ends: 2591 [2020-12-22 08:25:51,364 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 08:25:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2020-12-22 08:25:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2589. [2020-12-22 08:25:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2589 states. [2020-12-22 08:25:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3980 transitions. [2020-12-22 08:25:51,601 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3980 transitions. Word has length 53 [2020-12-22 08:25:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:51,602 INFO L481 AbstractCegarLoop]: Abstraction has 2589 states and 3980 transitions. [2020-12-22 08:25:51,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3980 transitions. [2020-12-22 08:25:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:25:51,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:51,603 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] [2020-12-22 08:25:51,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:25:51,604 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:51,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1689386392, now seen corresponding path program 1 times [2020-12-22 08:25:51,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:51,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381192881] [2020-12-22 08:25:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:51,713 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 08:25:51,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381192881] [2020-12-22 08:25:51,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:51,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:25:51,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127074701] [2020-12-22 08:25:51,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:51,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:51,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:51,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:51,717 INFO L87 Difference]: Start difference. First operand 2589 states and 3980 transitions. Second operand 6 states. [2020-12-22 08:25:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:52,389 INFO L93 Difference]: Finished difference Result 11799 states and 18193 transitions. [2020-12-22 08:25:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:25:52,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 08:25:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:52,439 INFO L225 Difference]: With dead ends: 11799 [2020-12-22 08:25:52,439 INFO L226 Difference]: Without dead ends: 9237 [2020-12-22 08:25:52,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:25:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9237 states. [2020-12-22 08:25:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9237 to 5149. [2020-12-22 08:25:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5149 states. [2020-12-22 08:25:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5149 states to 5149 states and 7804 transitions. [2020-12-22 08:25:52,968 INFO L78 Accepts]: Start accepts. Automaton has 5149 states and 7804 transitions. Word has length 54 [2020-12-22 08:25:52,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:52,969 INFO L481 AbstractCegarLoop]: Abstraction has 5149 states and 7804 transitions. [2020-12-22 08:25:52,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:52,969 INFO L276 IsEmpty]: Start isEmpty. Operand 5149 states and 7804 transitions. [2020-12-22 08:25:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:25:52,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:52,971 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] [2020-12-22 08:25:52,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:25:52,971 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash -850826877, now seen corresponding path program 1 times [2020-12-22 08:25:52,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:52,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111149201] [2020-12-22 08:25:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:53,099 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 08:25:53,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111149201] [2020-12-22 08:25:53,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:53,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:25:53,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161108341] [2020-12-22 08:25:53,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:25:53,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:53,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:25:53,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:25:53,107 INFO L87 Difference]: Start difference. First operand 5149 states and 7804 transitions. Second operand 5 states. [2020-12-22 08:25:53,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:53,923 INFO L93 Difference]: Finished difference Result 10527 states and 15837 transitions. [2020-12-22 08:25:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:25:53,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 08:25:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:53,978 INFO L225 Difference]: With dead ends: 10527 [2020-12-22 08:25:53,978 INFO L226 Difference]: Without dead ends: 10525 [2020-12-22 08:25:53,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2020-12-22 08:25:54,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 5405. [2020-12-22 08:25:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5405 states. [2020-12-22 08:25:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8060 transitions. [2020-12-22 08:25:54,550 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8060 transitions. Word has length 55 [2020-12-22 08:25:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:54,550 INFO L481 AbstractCegarLoop]: Abstraction has 5405 states and 8060 transitions. [2020-12-22 08:25:54,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:25:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8060 transitions. [2020-12-22 08:25:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:25:54,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:54,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:54,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:25:54,552 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash -595256360, now seen corresponding path program 1 times [2020-12-22 08:25:54,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:54,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676169942] [2020-12-22 08:25:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:54,607 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 08:25:54,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676169942] [2020-12-22 08:25:54,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:54,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:54,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702849570] [2020-12-22 08:25:54,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:54,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:54,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:54,609 INFO L87 Difference]: Start difference. First operand 5405 states and 8060 transitions. Second operand 3 states. [2020-12-22 08:25:55,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:55,356 INFO L93 Difference]: Finished difference Result 13259 states and 19788 transitions. [2020-12-22 08:25:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:55,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:25:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:55,397 INFO L225 Difference]: With dead ends: 13259 [2020-12-22 08:25:55,397 INFO L226 Difference]: Without dead ends: 7881 [2020-12-22 08:25:55,409 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 08:25:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7881 states. [2020-12-22 08:25:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7881 to 7823. [2020-12-22 08:25:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7823 states. [2020-12-22 08:25:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 11586 transitions. [2020-12-22 08:25:56,165 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 11586 transitions. Word has length 56 [2020-12-22 08:25:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:56,166 INFO L481 AbstractCegarLoop]: Abstraction has 7823 states and 11586 transitions. [2020-12-22 08:25:56,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:56,166 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 11586 transitions. [2020-12-22 08:25:56,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:25:56,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:56,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:56,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:25:56,180 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:56,183 INFO L82 PathProgramCache]: Analyzing trace with hash -264442661, now seen corresponding path program 1 times [2020-12-22 08:25:56,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:56,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190151587] [2020-12-22 08:25:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:56,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190151587] [2020-12-22 08:25:56,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156347487] [2020-12-22 08:25:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:25:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:56,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 08:25:56,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:25:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:25:56,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:25:56,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 08:25:56,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727273772] [2020-12-22 08:25:56,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:25:56,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:25:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:25:56,837 INFO L87 Difference]: Start difference. First operand 7823 states and 11586 transitions. Second operand 12 states. [2020-12-22 08:26:12,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:12,844 INFO L93 Difference]: Finished difference Result 112903 states and 164848 transitions. [2020-12-22 08:26:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-22 08:26:12,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-12-22 08:26:12,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:13,119 INFO L225 Difference]: With dead ends: 112903 [2020-12-22 08:26:13,119 INFO L226 Difference]: Without dead ends: 105109 [2020-12-22 08:26:13,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3778 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1653, Invalid=7853, Unknown=0, NotChecked=0, Total=9506 [2020-12-22 08:26:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105109 states. [2020-12-22 08:26:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105109 to 28707. [2020-12-22 08:26:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28707 states. [2020-12-22 08:26:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28707 states to 28707 states and 41326 transitions. [2020-12-22 08:26:17,595 INFO L78 Accepts]: Start accepts. Automaton has 28707 states and 41326 transitions. Word has length 79 [2020-12-22 08:26:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:17,595 INFO L481 AbstractCegarLoop]: Abstraction has 28707 states and 41326 transitions. [2020-12-22 08:26:17,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:26:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 28707 states and 41326 transitions. [2020-12-22 08:26:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:26:17,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:17,604 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:26:17,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 08:26:17,806 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:17,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:17,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2142394861, now seen corresponding path program 1 times [2020-12-22 08:26:17,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:17,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749168093] [2020-12-22 08:26:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:26:17,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749168093] [2020-12-22 08:26:17,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:17,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:26:17,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314766689] [2020-12-22 08:26:17,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:26:17,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:17,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:26:17,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:26:17,874 INFO L87 Difference]: Start difference. First operand 28707 states and 41326 transitions. Second operand 3 states. [2020-12-22 08:26:21,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:21,635 INFO L93 Difference]: Finished difference Result 67304 states and 97202 transitions. [2020-12-22 08:26:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:26:21,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:26:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:21,716 INFO L225 Difference]: With dead ends: 67304 [2020-12-22 08:26:21,716 INFO L226 Difference]: Without dead ends: 44118 [2020-12-22 08:26:21,755 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 08:26:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44118 states. [2020-12-22 08:26:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44118 to 44116. [2020-12-22 08:26:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44116 states. [2020-12-22 08:26:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44116 states to 44116 states and 63104 transitions. [2020-12-22 08:26:26,162 INFO L78 Accepts]: Start accepts. Automaton has 44116 states and 63104 transitions. Word has length 79 [2020-12-22 08:26:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:26,162 INFO L481 AbstractCegarLoop]: Abstraction has 44116 states and 63104 transitions. [2020-12-22 08:26:26,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:26:26,162 INFO L276 IsEmpty]: Start isEmpty. Operand 44116 states and 63104 transitions. [2020-12-22 08:26:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:26:26,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:26,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:26:26,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:26:26,177 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:26,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:26,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1807198399, now seen corresponding path program 1 times [2020-12-22 08:26:26,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:26,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434030306] [2020-12-22 08:26:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:26:26,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434030306] [2020-12-22 08:26:26,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:26,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:26:26,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988009847] [2020-12-22 08:26:26,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:26:26,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:26,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:26:26,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:26:26,240 INFO L87 Difference]: Start difference. First operand 44116 states and 63104 transitions. Second operand 3 states. [2020-12-22 08:26:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:32,026 INFO L93 Difference]: Finished difference Result 90088 states and 128859 transitions. [2020-12-22 08:26:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:26:32,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:26:32,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:32,104 INFO L225 Difference]: With dead ends: 90088 [2020-12-22 08:26:32,104 INFO L226 Difference]: Without dead ends: 63382 [2020-12-22 08:26:32,142 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 08:26:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63382 states. [2020-12-22 08:26:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63382 to 58420. [2020-12-22 08:26:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58420 states. [2020-12-22 08:26:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58420 states to 58420 states and 82705 transitions. [2020-12-22 08:26:37,953 INFO L78 Accepts]: Start accepts. Automaton has 58420 states and 82705 transitions. Word has length 79 [2020-12-22 08:26:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:37,953 INFO L481 AbstractCegarLoop]: Abstraction has 58420 states and 82705 transitions. [2020-12-22 08:26:37,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:26:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 58420 states and 82705 transitions. [2020-12-22 08:26:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:26:37,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:37,967 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:26:37,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:26:37,967 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:37,968 INFO L82 PathProgramCache]: Analyzing trace with hash 611086120, now seen corresponding path program 1 times [2020-12-22 08:26:37,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:37,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381868349] [2020-12-22 08:26:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:26:38,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381868349] [2020-12-22 08:26:38,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:38,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:26:38,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128260916] [2020-12-22 08:26:38,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:26:38,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:38,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:26:38,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:26:38,035 INFO L87 Difference]: Start difference. First operand 58420 states and 82705 transitions. Second operand 3 states. [2020-12-22 08:26:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:44,432 INFO L93 Difference]: Finished difference Result 93972 states and 132386 transitions. [2020-12-22 08:26:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:26:44,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:26:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:44,499 INFO L225 Difference]: With dead ends: 93972 [2020-12-22 08:26:44,500 INFO L226 Difference]: Without dead ends: 61947 [2020-12-22 08:26:44,523 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 08:26:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61947 states. [2020-12-22 08:26:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61947 to 59144. [2020-12-22 08:26:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59144 states. [2020-12-22 08:26:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59144 states to 59144 states and 82228 transitions. [2020-12-22 08:26:50,460 INFO L78 Accepts]: Start accepts. Automaton has 59144 states and 82228 transitions. Word has length 79 [2020-12-22 08:26:50,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:50,461 INFO L481 AbstractCegarLoop]: Abstraction has 59144 states and 82228 transitions. [2020-12-22 08:26:50,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:26:50,461 INFO L276 IsEmpty]: Start isEmpty. Operand 59144 states and 82228 transitions. [2020-12-22 08:26:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:26:50,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:50,474 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:26:50,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:26:50,474 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:50,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1536259716, now seen corresponding path program 1 times [2020-12-22 08:26:50,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:50,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767277621] [2020-12-22 08:26:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 08:26:50,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767277621] [2020-12-22 08:26:50,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:50,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:26:50,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60321204] [2020-12-22 08:26:50,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:26:50,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:26:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:26:50,553 INFO L87 Difference]: Start difference. First operand 59144 states and 82228 transitions. Second operand 6 states. [2020-12-22 08:27:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:00,685 INFO L93 Difference]: Finished difference Result 128822 states and 181079 transitions. [2020-12-22 08:27:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:27:00,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 08:27:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:00,806 INFO L225 Difference]: With dead ends: 128822 [2020-12-22 08:27:00,806 INFO L226 Difference]: Without dead ends: 101015 [2020-12-22 08:27:00,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:27:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101015 states. [2020-12-22 08:27:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101015 to 79697. [2020-12-22 08:27:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79697 states. [2020-12-22 08:27:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79697 states to 79697 states and 110745 transitions. [2020-12-22 08:27:09,354 INFO L78 Accepts]: Start accepts. Automaton has 79697 states and 110745 transitions. Word has length 79 [2020-12-22 08:27:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:09,355 INFO L481 AbstractCegarLoop]: Abstraction has 79697 states and 110745 transitions. [2020-12-22 08:27:09,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:27:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 79697 states and 110745 transitions. [2020-12-22 08:27:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:27:09,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:09,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:09,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:27:09,368 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash -259731985, now seen corresponding path program 1 times [2020-12-22 08:27:09,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:09,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815468215] [2020-12-22 08:27:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:27:09,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815468215] [2020-12-22 08:27:09,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:09,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:27:09,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676578829] [2020-12-22 08:27:09,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:27:09,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:09,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:27:09,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:27:09,430 INFO L87 Difference]: Start difference. First operand 79697 states and 110745 transitions. Second operand 5 states. [2020-12-22 08:27:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:22,667 INFO L93 Difference]: Finished difference Result 200082 states and 277196 transitions. [2020-12-22 08:27:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:27:22,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-12-22 08:27:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:22,833 INFO L225 Difference]: With dead ends: 200082 [2020-12-22 08:27:22,833 INFO L226 Difference]: Without dead ends: 120509 [2020-12-22 08:27:23,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:27:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120509 states. [2020-12-22 08:27:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120509 to 119976. [2020-12-22 08:27:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119976 states. [2020-12-22 08:27:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119976 states to 119976 states and 165118 transitions. [2020-12-22 08:27:36,236 INFO L78 Accepts]: Start accepts. Automaton has 119976 states and 165118 transitions. Word has length 79 [2020-12-22 08:27:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:36,236 INFO L481 AbstractCegarLoop]: Abstraction has 119976 states and 165118 transitions. [2020-12-22 08:27:36,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:27:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 119976 states and 165118 transitions. [2020-12-22 08:27:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:27:36,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:36,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:36,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:27:36,248 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:36,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:36,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1327277398, now seen corresponding path program 1 times [2020-12-22 08:27:36,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:36,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638492500] [2020-12-22 08:27:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 08:27:36,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638492500] [2020-12-22 08:27:36,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:36,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:27:36,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263330590] [2020-12-22 08:27:36,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:27:36,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:36,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:27:36,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:27:36,338 INFO L87 Difference]: Start difference. First operand 119976 states and 165118 transitions. Second operand 6 states. [2020-12-22 08:27:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:56,032 INFO L93 Difference]: Finished difference Result 207040 states and 287957 transitions. [2020-12-22 08:27:56,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:27:56,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 08:27:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:56,406 INFO L225 Difference]: With dead ends: 207040 [2020-12-22 08:27:56,407 INFO L226 Difference]: Without dead ends: 180875 [2020-12-22 08:27:56,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:27:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180875 states. [2020-12-22 08:28:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180875 to 145392. [2020-12-22 08:28:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145392 states. [2020-12-22 08:28:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145392 states to 145392 states and 200384 transitions. [2020-12-22 08:28:13,083 INFO L78 Accepts]: Start accepts. Automaton has 145392 states and 200384 transitions. Word has length 79 [2020-12-22 08:28:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:13,083 INFO L481 AbstractCegarLoop]: Abstraction has 145392 states and 200384 transitions. [2020-12-22 08:28:13,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:28:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 145392 states and 200384 transitions. [2020-12-22 08:28:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:28:13,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:13,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:13,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:28:13,097 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1216138536, now seen corresponding path program 1 times [2020-12-22 08:28:13,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:13,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484381696] [2020-12-22 08:28:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:28:13,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484381696] [2020-12-22 08:28:13,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:13,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:28:13,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252347779] [2020-12-22 08:28:13,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:28:13,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:13,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:28:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:28:13,434 INFO L87 Difference]: Start difference. First operand 145392 states and 200384 transitions. Second operand 6 states.