/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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:27:47,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:27:47,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:27:47,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:27:47,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:27:47,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:27:47,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:27:47,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:27:47,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:27:47,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:27:47,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:27:47,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:27:47,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:27:47,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:27:47,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:27:47,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:27:47,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:27:47,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:27:47,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:27:47,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:27:47,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:27:47,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:27:47,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:27:47,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:27:47,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:27:47,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:27:47,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:27:47,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:27:47,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:27:47,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:27:47,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:27:47,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:27:47,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:27:47,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:27:47,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:27:47,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:27:47,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:27:47,537 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:27:47,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:27:47,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:27:47,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:27:47,540 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:27:47,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:27:47,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:27:47,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:27:47,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:27:47,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:27:47,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:27:47,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:27:47,542 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:27:47,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:27:47,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:27:47,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:27:47,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:27:47,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:27:47,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:27:47,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:27:47,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:27:47,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:27:47,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:27:47,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:27:47,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:27:47,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:27:47,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:27:47,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:27:47,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:27:47,957 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:27:47,958 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:27:47,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:27:48,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16cd8ac1e/63668df3c1104539981af2d7b7a51320/FLAGac08880e0 [2020-12-22 08:27:48,757 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:27:48,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:27:48,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16cd8ac1e/63668df3c1104539981af2d7b7a51320/FLAGac08880e0 [2020-12-22 08:27:49,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16cd8ac1e/63668df3c1104539981af2d7b7a51320 [2020-12-22 08:27:49,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:27:49,051 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:27:49,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:27:49,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:27:49,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:27:49,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae94d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49, skipping insertion in model container [2020-12-22 08:27:49,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:27:49,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:27:49,365 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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5954,5967] [2020-12-22 08:27:49,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:27:49,474 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:27:49,573 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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5954,5967] [2020-12-22 08:27:49,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:27:49,677 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:27:49,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49 WrapperNode [2020-12-22 08:27:49,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:27:49,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:27:49,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:27:49,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:27:49,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:27:49,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:27:49,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:27:49,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:27:49,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (1/1) ... [2020-12-22 08:27:49,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:27:49,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:27:49,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:27:49,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:27:49,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (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 08:27:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:27:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:27:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:27:49,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:27:50,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:27:50,782 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:27:50,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:27:50 BoogieIcfgContainer [2020-12-22 08:27:50,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:27:50,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:27:50,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:27:50,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:27:50,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:27:49" (1/3) ... [2020-12-22 08:27:50,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c50ff22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:27:50, skipping insertion in model container [2020-12-22 08:27:50,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:27:49" (2/3) ... [2020-12-22 08:27:50,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c50ff22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:27:50, skipping insertion in model container [2020-12-22 08:27:50,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:27:50" (3/3) ... [2020-12-22 08:27:50,797 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:27:50,805 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:27:50,811 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:27:50,833 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:27:50,875 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:27:50,875 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:27:50,875 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:27:50,876 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:27:50,876 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:27:50,876 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:27:50,876 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:27:50,876 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:27:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-12-22 08:27:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:27:50,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:50,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:50,910 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1025697732, now seen corresponding path program 1 times [2020-12-22 08:27:50,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:50,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910433711] [2020-12-22 08:27:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:51,341 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 08:27:51,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910433711] [2020-12-22 08:27:51,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:51,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:27:51,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189082501] [2020-12-22 08:27:51,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:27:51,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:51,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:27:51,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:27:51,372 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 3 states. [2020-12-22 08:27:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:51,500 INFO L93 Difference]: Finished difference Result 328 states and 528 transitions. [2020-12-22 08:27:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:27:51,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:27:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:51,517 INFO L225 Difference]: With dead ends: 328 [2020-12-22 08:27:51,518 INFO L226 Difference]: Without dead ends: 219 [2020-12-22 08:27:51,522 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 08:27:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-22 08:27:51,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-12-22 08:27:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-22 08:27:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 325 transitions. [2020-12-22 08:27:51,632 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 325 transitions. Word has length 61 [2020-12-22 08:27:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:51,633 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 325 transitions. [2020-12-22 08:27:51,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:27:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 325 transitions. [2020-12-22 08:27:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:27:51,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:51,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:51,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:27:51,644 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1571099909, now seen corresponding path program 1 times [2020-12-22 08:27:51,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:51,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876811045] [2020-12-22 08:27:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:51,873 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 08:27:51,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876811045] [2020-12-22 08:27:51,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:51,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:27:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374137802] [2020-12-22 08:27:51,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:27:51,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:51,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:27:51,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:27:51,878 INFO L87 Difference]: Start difference. First operand 217 states and 325 transitions. Second operand 3 states. [2020-12-22 08:27:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:51,927 INFO L93 Difference]: Finished difference Result 549 states and 853 transitions. [2020-12-22 08:27:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:27:51,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:27:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:51,932 INFO L225 Difference]: With dead ends: 549 [2020-12-22 08:27:51,932 INFO L226 Difference]: Without dead ends: 367 [2020-12-22 08:27:51,935 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 08:27:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-22 08:27:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2020-12-22 08:27:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-12-22 08:27:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 560 transitions. [2020-12-22 08:27:51,994 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 560 transitions. Word has length 62 [2020-12-22 08:27:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:51,996 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 560 transitions. [2020-12-22 08:27:51,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:27:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 560 transitions. [2020-12-22 08:27:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:27:51,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:51,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:52,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:27:52,002 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash 195770199, now seen corresponding path program 1 times [2020-12-22 08:27:52,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:52,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839080519] [2020-12-22 08:27:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:27:52,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839080519] [2020-12-22 08:27:52,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:52,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:27:52,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740909243] [2020-12-22 08:27:52,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:27:52,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:52,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:27:52,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:27:52,163 INFO L87 Difference]: Start difference. First operand 365 states and 560 transitions. Second operand 3 states. [2020-12-22 08:27:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:52,228 INFO L93 Difference]: Finished difference Result 961 states and 1506 transitions. [2020-12-22 08:27:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:27:52,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:27:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:52,233 INFO L225 Difference]: With dead ends: 961 [2020-12-22 08:27:52,234 INFO L226 Difference]: Without dead ends: 631 [2020-12-22 08:27:52,235 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 08:27:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-12-22 08:27:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2020-12-22 08:27:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2020-12-22 08:27:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 976 transitions. [2020-12-22 08:27:52,279 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 976 transitions. Word has length 63 [2020-12-22 08:27:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:52,279 INFO L481 AbstractCegarLoop]: Abstraction has 629 states and 976 transitions. [2020-12-22 08:27:52,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:27:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 976 transitions. [2020-12-22 08:27:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:27:52,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:52,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:52,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:27:52,286 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:52,287 INFO L82 PathProgramCache]: Analyzing trace with hash 92320152, now seen corresponding path program 1 times [2020-12-22 08:27:52,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:52,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591292476] [2020-12-22 08:27:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:52,360 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 08:27:52,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591292476] [2020-12-22 08:27:52,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:52,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:27:52,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707872440] [2020-12-22 08:27:52,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:27:52,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:52,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:27:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:27:52,363 INFO L87 Difference]: Start difference. First operand 629 states and 976 transitions. Second operand 3 states. [2020-12-22 08:27:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:52,427 INFO L93 Difference]: Finished difference Result 1689 states and 2650 transitions. [2020-12-22 08:27:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:27:52,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:27:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:52,435 INFO L225 Difference]: With dead ends: 1689 [2020-12-22 08:27:52,436 INFO L226 Difference]: Without dead ends: 1095 [2020-12-22 08:27:52,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:27:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2020-12-22 08:27:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1093. [2020-12-22 08:27:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1093 states. [2020-12-22 08:27:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1700 transitions. [2020-12-22 08:27:52,496 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1700 transitions. Word has length 64 [2020-12-22 08:27:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:52,497 INFO L481 AbstractCegarLoop]: Abstraction has 1093 states and 1700 transitions. [2020-12-22 08:27:52,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:27:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1700 transitions. [2020-12-22 08:27:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:27:52,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:52,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:52,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:27:52,499 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:52,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1673406722, now seen corresponding path program 1 times [2020-12-22 08:27:52,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:52,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002145051] [2020-12-22 08:27:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:52,755 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 08:27:52,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002145051] [2020-12-22 08:27:52,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:52,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:27:52,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202915362] [2020-12-22 08:27:52,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:27:52,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:52,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:27:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:27:52,757 INFO L87 Difference]: Start difference. First operand 1093 states and 1700 transitions. Second operand 7 states. [2020-12-22 08:27:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:53,234 INFO L93 Difference]: Finished difference Result 5663 states and 8841 transitions. [2020-12-22 08:27:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:27:53,235 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-12-22 08:27:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:53,261 INFO L225 Difference]: With dead ends: 5663 [2020-12-22 08:27:53,262 INFO L226 Difference]: Without dead ends: 4605 [2020-12-22 08:27:53,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:27:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2020-12-22 08:27:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4597. [2020-12-22 08:27:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4597 states. [2020-12-22 08:27:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 7156 transitions. [2020-12-22 08:27:53,652 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 7156 transitions. Word has length 65 [2020-12-22 08:27:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:53,655 INFO L481 AbstractCegarLoop]: Abstraction has 4597 states and 7156 transitions. [2020-12-22 08:27:53,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:27:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 7156 transitions. [2020-12-22 08:27:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:27:53,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:53,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:53,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:27:53,658 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:53,658 INFO L82 PathProgramCache]: Analyzing trace with hash 222361335, now seen corresponding path program 1 times [2020-12-22 08:27:53,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:53,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515618384] [2020-12-22 08:27:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:53,784 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 08:27:53,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515618384] [2020-12-22 08:27:53,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:53,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:27:53,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924087822] [2020-12-22 08:27:53,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:27:53,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:53,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:27:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:27:53,788 INFO L87 Difference]: Start difference. First operand 4597 states and 7156 transitions. Second operand 3 states. [2020-12-22 08:27:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:54,334 INFO L93 Difference]: Finished difference Result 12361 states and 19206 transitions. [2020-12-22 08:27:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:27:54,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 08:27:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:54,379 INFO L225 Difference]: With dead ends: 12361 [2020-12-22 08:27:54,379 INFO L226 Difference]: Without dead ends: 7799 [2020-12-22 08:27:54,390 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 08:27:54,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7799 states. [2020-12-22 08:27:54,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7799 to 7797. [2020-12-22 08:27:54,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7797 states. [2020-12-22 08:27:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7797 states to 7797 states and 12004 transitions. [2020-12-22 08:27:54,969 INFO L78 Accepts]: Start accepts. Automaton has 7797 states and 12004 transitions. Word has length 66 [2020-12-22 08:27:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:54,969 INFO L481 AbstractCegarLoop]: Abstraction has 7797 states and 12004 transitions. [2020-12-22 08:27:54,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:27:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 7797 states and 12004 transitions. [2020-12-22 08:27:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:27:54,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:54,971 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:54,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:27:54,971 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:54,972 INFO L82 PathProgramCache]: Analyzing trace with hash 376052341, now seen corresponding path program 1 times [2020-12-22 08:27:54,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:54,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590103139] [2020-12-22 08:27:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:55,066 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 08:27:55,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590103139] [2020-12-22 08:27:55,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:55,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:27:55,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127765467] [2020-12-22 08:27:55,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:27:55,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:55,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:27:55,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:27:55,069 INFO L87 Difference]: Start difference. First operand 7797 states and 12004 transitions. Second operand 6 states. [2020-12-22 08:27:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:56,641 INFO L93 Difference]: Finished difference Result 29259 states and 45031 transitions. [2020-12-22 08:27:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:27:56,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:27:56,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:56,758 INFO L225 Difference]: With dead ends: 29259 [2020-12-22 08:27:56,758 INFO L226 Difference]: Without dead ends: 21497 [2020-12-22 08:27:56,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:27:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21497 states. [2020-12-22 08:27:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21497 to 21493. [2020-12-22 08:27:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21493 states. [2020-12-22 08:27:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21493 states to 21493 states and 32916 transitions. [2020-12-22 08:27:58,436 INFO L78 Accepts]: Start accepts. Automaton has 21493 states and 32916 transitions. Word has length 67 [2020-12-22 08:27:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:58,437 INFO L481 AbstractCegarLoop]: Abstraction has 21493 states and 32916 transitions. [2020-12-22 08:27:58,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:27:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 21493 states and 32916 transitions. [2020-12-22 08:27:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:27:58,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:58,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:58,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:27:58,440 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:58,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1993557232, now seen corresponding path program 1 times [2020-12-22 08:27:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:58,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023134649] [2020-12-22 08:27:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:58,576 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 08:27:58,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023134649] [2020-12-22 08:27:58,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:58,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:27:58,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84784114] [2020-12-22 08:27:58,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:27:58,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:58,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:27:58,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:27:58,580 INFO L87 Difference]: Start difference. First operand 21493 states and 32916 transitions. Second operand 7 states. [2020-12-22 08:28:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:03,080 INFO L93 Difference]: Finished difference Result 112737 states and 172858 transitions. [2020-12-22 08:28:03,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:28:03,081 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-12-22 08:28:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:03,346 INFO L225 Difference]: With dead ends: 112737 [2020-12-22 08:28:03,346 INFO L226 Difference]: Without dead ends: 91279 [2020-12-22 08:28:03,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:28:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91279 states. [2020-12-22 08:28:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91279 to 42949. [2020-12-22 08:28:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42949 states. [2020-12-22 08:28:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42949 states to 42949 states and 64900 transitions. [2020-12-22 08:28:07,184 INFO L78 Accepts]: Start accepts. Automaton has 42949 states and 64900 transitions. Word has length 67 [2020-12-22 08:28:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:07,184 INFO L481 AbstractCegarLoop]: Abstraction has 42949 states and 64900 transitions. [2020-12-22 08:28:07,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:28:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand 42949 states and 64900 transitions. [2020-12-22 08:28:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:28:07,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:07,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:07,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:28:07,186 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:07,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1651275811, now seen corresponding path program 1 times [2020-12-22 08:28:07,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:07,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480986440] [2020-12-22 08:28:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:07,284 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 08:28:07,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480986440] [2020-12-22 08:28:07,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:07,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:28:07,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592027166] [2020-12-22 08:28:07,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:28:07,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:28:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:28:07,292 INFO L87 Difference]: Start difference. First operand 42949 states and 64900 transitions. Second operand 5 states. [2020-12-22 08:28:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:12,070 INFO L93 Difference]: Finished difference Result 87655 states and 131557 transitions. [2020-12-22 08:28:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:28:12,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 08:28:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:12,387 INFO L225 Difference]: With dead ends: 87655 [2020-12-22 08:28:12,387 INFO L226 Difference]: Without dead ends: 87653 [2020-12-22 08:28:12,410 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 08:28:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87653 states. [2020-12-22 08:28:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87653 to 44741. [2020-12-22 08:28:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44741 states. [2020-12-22 08:28:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44741 states to 44741 states and 66692 transitions. [2020-12-22 08:28:16,079 INFO L78 Accepts]: Start accepts. Automaton has 44741 states and 66692 transitions. Word has length 68 [2020-12-22 08:28:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:16,079 INFO L481 AbstractCegarLoop]: Abstraction has 44741 states and 66692 transitions. [2020-12-22 08:28:16,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:28:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 44741 states and 66692 transitions. [2020-12-22 08:28:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:28:16,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:16,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:16,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:28:16,081 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash -339484320, now seen corresponding path program 1 times [2020-12-22 08:28:16,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:16,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078236147] [2020-12-22 08:28:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:16,143 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 08:28:16,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078236147] [2020-12-22 08:28:16,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:16,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:16,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82447411] [2020-12-22 08:28:16,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:16,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:16,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:16,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:16,146 INFO L87 Difference]: Start difference. First operand 44741 states and 66692 transitions. Second operand 3 states. [2020-12-22 08:28:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:19,465 INFO L93 Difference]: Finished difference Result 97051 states and 144488 transitions. [2020-12-22 08:28:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:19,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 08:28:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:19,565 INFO L225 Difference]: With dead ends: 97051 [2020-12-22 08:28:19,566 INFO L226 Difference]: Without dead ends: 52345 [2020-12-22 08:28:19,625 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 08:28:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52345 states. [2020-12-22 08:28:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52345 to 52199. [2020-12-22 08:28:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52199 states. [2020-12-22 08:28:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52199 states to 52199 states and 77398 transitions. [2020-12-22 08:28:23,182 INFO L78 Accepts]: Start accepts. Automaton has 52199 states and 77398 transitions. Word has length 69 [2020-12-22 08:28:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:23,182 INFO L481 AbstractCegarLoop]: Abstraction has 52199 states and 77398 transitions. [2020-12-22 08:28:23,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 52199 states and 77398 transitions. [2020-12-22 08:28:23,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 08:28:23,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:23,207 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:23,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:28:23,207 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1573259719, now seen corresponding path program 1 times [2020-12-22 08:28:23,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:23,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947895689] [2020-12-22 08:28:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:23,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947895689] [2020-12-22 08:28:23,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:23,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:23,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304806857] [2020-12-22 08:28:23,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:23,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:23,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:23,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:23,272 INFO L87 Difference]: Start difference. First operand 52199 states and 77398 transitions. Second operand 3 states. [2020-12-22 08:28:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:28,775 INFO L93 Difference]: Finished difference Result 139372 states and 206874 transitions. [2020-12-22 08:28:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:28,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 08:28:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:28,947 INFO L225 Difference]: With dead ends: 139372 [2020-12-22 08:28:28,947 INFO L226 Difference]: Without dead ends: 93546 [2020-12-22 08:28:29,020 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 08:28:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93546 states. [2020-12-22 08:28:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93546 to 80872. [2020-12-22 08:28:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80872 states. [2020-12-22 08:28:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80872 states to 80872 states and 119016 transitions. [2020-12-22 08:28:34,980 INFO L78 Accepts]: Start accepts. Automaton has 80872 states and 119016 transitions. Word has length 96 [2020-12-22 08:28:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:34,980 INFO L481 AbstractCegarLoop]: Abstraction has 80872 states and 119016 transitions. [2020-12-22 08:28:34,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 80872 states and 119016 transitions. [2020-12-22 08:28:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 08:28:35,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:35,021 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:35,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:28:35,021 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:35,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1725865046, now seen corresponding path program 1 times [2020-12-22 08:28:35,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:35,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118578128] [2020-12-22 08:28:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:35,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118578128] [2020-12-22 08:28:35,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99771989] [2020-12-22 08:28:35,298 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 08:28:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 08:28:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:28:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:28:35,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:28:35,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 08:28:35,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926809706] [2020-12-22 08:28:35,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:28:35,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:35,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:28:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:28:35,887 INFO L87 Difference]: Start difference. First operand 80872 states and 119016 transitions. Second operand 12 states. [2020-12-22 08:29:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:29:18,600 INFO L93 Difference]: Finished difference Result 501260 states and 729580 transitions. [2020-12-22 08:29:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 08:29:18,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2020-12-22 08:29:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:29:19,557 INFO L225 Difference]: With dead ends: 501260 [2020-12-22 08:29:19,557 INFO L226 Difference]: Without dead ends: 426698 [2020-12-22 08:29:19,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1677, Invalid=7065, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 08:29:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426698 states. [2020-12-22 08:29:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426698 to 195408. [2020-12-22 08:29:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195408 states. [2020-12-22 08:29:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195408 states to 195408 states and 284004 transitions. [2020-12-22 08:29:40,377 INFO L78 Accepts]: Start accepts. Automaton has 195408 states and 284004 transitions. Word has length 96 [2020-12-22 08:29:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:29:40,377 INFO L481 AbstractCegarLoop]: Abstraction has 195408 states and 284004 transitions. [2020-12-22 08:29:40,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:29:40,377 INFO L276 IsEmpty]: Start isEmpty. Operand 195408 states and 284004 transitions. [2020-12-22 08:29:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 08:29:40,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:29:40,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:29:40,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 08:29:40,644 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:29:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:29:40,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2035229118, now seen corresponding path program 1 times [2020-12-22 08:29:40,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:29:40,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442626509] [2020-12-22 08:29:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:29:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:29:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 08:29:40,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442626509] [2020-12-22 08:29:40,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:29:40,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:29:40,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749298102] [2020-12-22 08:29:40,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:29:40,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:29:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:29:40,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:29:40,762 INFO L87 Difference]: Start difference. First operand 195408 states and 284004 transitions. Second operand 6 states.