/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:21:20,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:21:20,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:21:20,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:21:20,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:21:20,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:21:20,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:21:20,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:21:20,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:21:20,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:21:20,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:21:20,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:21:20,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:21:20,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:21:20,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:21:20,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:21:20,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:21:20,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:21:20,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:21:20,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:21:20,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:21:20,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:21:20,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:21:20,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:21:20,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:21:20,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:21:20,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:21:20,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:21:20,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:21:20,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:21:20,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:21:20,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:21:20,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:21:20,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:21:20,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:21:20,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:21:20,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:21:20,677 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:21:20,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:21:20,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:21:20,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:21:20,680 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:21:20,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:21:20,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:21:20,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:21:20,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:21:20,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:21:20,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:21:20,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:21:20,684 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:21:20,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:21:20,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:21:20,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:21:20,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:21:20,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:21:20,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:21:20,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:21:20,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:21:20,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:21:20,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:21:20,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:21:20,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:21:20,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:21:21,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:21:21,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:21:21,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:21:21,167 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:21:21,168 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:21:21,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c [2020-12-22 07:21:21,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac29a8213/34c2456210514330b262480648ee5cb5/FLAG6326350c4 [2020-12-22 07:21:21,975 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:21:21,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c [2020-12-22 07:21:22,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac29a8213/34c2456210514330b262480648ee5cb5/FLAG6326350c4 [2020-12-22 07:21:22,264 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac29a8213/34c2456210514330b262480648ee5cb5 [2020-12-22 07:21:22,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:21:22,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:21:22,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:21:22,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:21:22,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:21:22,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:22,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb34025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22, skipping insertion in model container [2020-12-22 07:21:22,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:22,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:21:22,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:21:22,799 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c[28194,28207] [2020-12-22 07:21:22,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:21:22,827 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:21:22,933 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c[28194,28207] [2020-12-22 07:21:22,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:21:22,956 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:21:22,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22 WrapperNode [2020-12-22 07:21:22,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:21:22,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:21:22,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:21:22,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:21:22,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:22,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:23,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:21:23,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:21:23,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:21:23,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:21:23,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:23,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:23,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:23,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:23,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:23,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:23,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (1/1) ... [2020-12-22 07:21:23,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:21:23,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:21:23,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:21:23,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:21:23,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:21:23,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:21:23,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:21:23,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:21:23,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:21:24,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:21:24,853 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:21:24,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:24 BoogieIcfgContainer [2020-12-22 07:21:24,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:21:24,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:21:24,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:21:24,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:21:24,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:21:22" (1/3) ... [2020-12-22 07:21:24,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fd685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:24, skipping insertion in model container [2020-12-22 07:21:24,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:21:22" (2/3) ... [2020-12-22 07:21:24,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fd685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:21:24, skipping insertion in model container [2020-12-22 07:21:24,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:21:24" (3/3) ... [2020-12-22 07:21:24,865 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.BOUNDED-8.pals.c [2020-12-22 07:21:24,872 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:21:24,878 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:21:24,898 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:21:24,930 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:21:24,930 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:21:24,930 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:21:24,930 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:21:24,931 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:21:24,931 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:21:24,931 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:21:24,931 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:21:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states. [2020-12-22 07:21:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:21:24,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:24,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:24,974 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:24,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2110216456, now seen corresponding path program 1 times [2020-12-22 07:21:24,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:24,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473477191] [2020-12-22 07:21:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:25,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473477191] [2020-12-22 07:21:25,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:25,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:21:25,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576290149] [2020-12-22 07:21:25,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:21:25,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:21:25,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:21:25,505 INFO L87 Difference]: Start difference. First operand 304 states. Second operand 2 states. [2020-12-22 07:21:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:25,591 INFO L93 Difference]: Finished difference Result 417 states and 738 transitions. [2020-12-22 07:21:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:21:25,596 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:21:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:25,635 INFO L225 Difference]: With dead ends: 417 [2020-12-22 07:21:25,635 INFO L226 Difference]: Without dead ends: 300 [2020-12-22 07:21:25,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:21:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-22 07:21:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2020-12-22 07:21:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-12-22 07:21:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 539 transitions. [2020-12-22 07:21:25,715 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 539 transitions. Word has length 77 [2020-12-22 07:21:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:25,716 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 539 transitions. [2020-12-22 07:21:25,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:21:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 539 transitions. [2020-12-22 07:21:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:21:25,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:25,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:25,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:21:25,725 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2050737334, now seen corresponding path program 1 times [2020-12-22 07:21:25,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:25,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742047746] [2020-12-22 07:21:25,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:26,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742047746] [2020-12-22 07:21:26,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:26,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:21:26,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006246594] [2020-12-22 07:21:26,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:21:26,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:26,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:21:26,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:26,056 INFO L87 Difference]: Start difference. First operand 300 states and 539 transitions. Second operand 5 states. [2020-12-22 07:21:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:26,196 INFO L93 Difference]: Finished difference Result 412 states and 728 transitions. [2020-12-22 07:21:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:21:26,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:21:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:26,200 INFO L225 Difference]: With dead ends: 412 [2020-12-22 07:21:26,200 INFO L226 Difference]: Without dead ends: 300 [2020-12-22 07:21:26,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:21:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-22 07:21:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2020-12-22 07:21:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-12-22 07:21:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 497 transitions. [2020-12-22 07:21:26,233 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 497 transitions. Word has length 77 [2020-12-22 07:21:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:26,234 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 497 transitions. [2020-12-22 07:21:26,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:21:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 497 transitions. [2020-12-22 07:21:26,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:21:26,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:26,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:26,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:21:26,243 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:26,244 INFO L82 PathProgramCache]: Analyzing trace with hash 255571390, now seen corresponding path program 1 times [2020-12-22 07:21:26,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:26,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391590439] [2020-12-22 07:21:26,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:26,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391590439] [2020-12-22 07:21:26,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:26,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:26,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188579058] [2020-12-22 07:21:26,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:26,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:26,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:26,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:26,436 INFO L87 Difference]: Start difference. First operand 300 states and 497 transitions. Second operand 3 states. [2020-12-22 07:21:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:26,500 INFO L93 Difference]: Finished difference Result 505 states and 846 transitions. [2020-12-22 07:21:26,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:26,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:21:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:26,505 INFO L225 Difference]: With dead ends: 505 [2020-12-22 07:21:26,505 INFO L226 Difference]: Without dead ends: 397 [2020-12-22 07:21:26,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-12-22 07:21:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2020-12-22 07:21:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 07:21:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 655 transitions. [2020-12-22 07:21:26,525 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 655 transitions. Word has length 118 [2020-12-22 07:21:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:26,526 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 655 transitions. [2020-12-22 07:21:26,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 655 transitions. [2020-12-22 07:21:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:21:26,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:26,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:26,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:21:26,534 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1923540700, now seen corresponding path program 1 times [2020-12-22 07:21:26,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:26,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260456373] [2020-12-22 07:21:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:26,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260456373] [2020-12-22 07:21:26,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:26,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:26,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880741851] [2020-12-22 07:21:26,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:26,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:26,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:26,713 INFO L87 Difference]: Start difference. First operand 395 states and 655 transitions. Second operand 3 states. [2020-12-22 07:21:26,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:26,753 INFO L93 Difference]: Finished difference Result 593 states and 993 transitions. [2020-12-22 07:21:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:26,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:21:26,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:26,762 INFO L225 Difference]: With dead ends: 593 [2020-12-22 07:21:26,762 INFO L226 Difference]: Without dead ends: 485 [2020-12-22 07:21:26,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:26,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-12-22 07:21:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 483. [2020-12-22 07:21:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-12-22 07:21:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 805 transitions. [2020-12-22 07:21:26,807 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 805 transitions. Word has length 121 [2020-12-22 07:21:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:26,810 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 805 transitions. [2020-12-22 07:21:26,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 805 transitions. [2020-12-22 07:21:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:21:26,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:26,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:26,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:21:26,814 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:26,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1109580608, now seen corresponding path program 1 times [2020-12-22 07:21:26,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:26,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213449685] [2020-12-22 07:21:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:26,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213449685] [2020-12-22 07:21:26,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:26,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:26,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65478208] [2020-12-22 07:21:26,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:26,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:26,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:26,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:26,978 INFO L87 Difference]: Start difference. First operand 483 states and 805 transitions. Second operand 3 states. [2020-12-22 07:21:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:27,037 INFO L93 Difference]: Finished difference Result 1034 states and 1736 transitions. [2020-12-22 07:21:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:27,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:21:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:27,045 INFO L225 Difference]: With dead ends: 1034 [2020-12-22 07:21:27,045 INFO L226 Difference]: Without dead ends: 745 [2020-12-22 07:21:27,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:27,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2020-12-22 07:21:27,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2020-12-22 07:21:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-12-22 07:21:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1241 transitions. [2020-12-22 07:21:27,085 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1241 transitions. Word has length 121 [2020-12-22 07:21:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:27,086 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 1241 transitions. [2020-12-22 07:21:27,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1241 transitions. [2020-12-22 07:21:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:21:27,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:27,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:27,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:21:27,095 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:27,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2073181113, now seen corresponding path program 1 times [2020-12-22 07:21:27,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:27,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411356314] [2020-12-22 07:21:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:27,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411356314] [2020-12-22 07:21:27,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:27,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:27,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748213585] [2020-12-22 07:21:27,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:27,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:27,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:27,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:27,288 INFO L87 Difference]: Start difference. First operand 743 states and 1241 transitions. Second operand 3 states. [2020-12-22 07:21:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:27,364 INFO L93 Difference]: Finished difference Result 1274 states and 2138 transitions. [2020-12-22 07:21:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:27,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:21:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:27,370 INFO L225 Difference]: With dead ends: 1274 [2020-12-22 07:21:27,371 INFO L226 Difference]: Without dead ends: 985 [2020-12-22 07:21:27,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:27,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2020-12-22 07:21:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 983. [2020-12-22 07:21:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 983 states. [2020-12-22 07:21:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1642 transitions. [2020-12-22 07:21:27,432 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1642 transitions. Word has length 124 [2020-12-22 07:21:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:27,433 INFO L481 AbstractCegarLoop]: Abstraction has 983 states and 1642 transitions. [2020-12-22 07:21:27,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1642 transitions. [2020-12-22 07:21:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:21:27,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:27,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:27,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:21:27,438 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:27,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1914082347, now seen corresponding path program 1 times [2020-12-22 07:21:27,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:27,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019404884] [2020-12-22 07:21:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:27,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019404884] [2020-12-22 07:21:27,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:27,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:27,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125656840] [2020-12-22 07:21:27,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:27,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:27,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:27,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:27,595 INFO L87 Difference]: Start difference. First operand 983 states and 1642 transitions. Second operand 3 states. [2020-12-22 07:21:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:27,663 INFO L93 Difference]: Finished difference Result 2454 states and 4107 transitions. [2020-12-22 07:21:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:27,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:21:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:27,674 INFO L225 Difference]: With dead ends: 2454 [2020-12-22 07:21:27,674 INFO L226 Difference]: Without dead ends: 1678 [2020-12-22 07:21:27,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2020-12-22 07:21:27,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1676. [2020-12-22 07:21:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2020-12-22 07:21:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2788 transitions. [2020-12-22 07:21:27,741 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2788 transitions. Word has length 124 [2020-12-22 07:21:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:27,742 INFO L481 AbstractCegarLoop]: Abstraction has 1676 states and 2788 transitions. [2020-12-22 07:21:27,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2788 transitions. [2020-12-22 07:21:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:21:27,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:27,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:27,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:21:27,745 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:27,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1459354075, now seen corresponding path program 1 times [2020-12-22 07:21:27,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:27,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699359008] [2020-12-22 07:21:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:27,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699359008] [2020-12-22 07:21:27,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:27,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969211249] [2020-12-22 07:21:27,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:27,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:27,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:27,890 INFO L87 Difference]: Start difference. First operand 1676 states and 2788 transitions. Second operand 3 states. [2020-12-22 07:21:27,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:27,957 INFO L93 Difference]: Finished difference Result 3061 states and 5111 transitions. [2020-12-22 07:21:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:27,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:21:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:27,971 INFO L225 Difference]: With dead ends: 3061 [2020-12-22 07:21:27,971 INFO L226 Difference]: Without dead ends: 2285 [2020-12-22 07:21:27,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-12-22 07:21:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2020-12-22 07:21:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 07:21:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3791 transitions. [2020-12-22 07:21:28,067 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3791 transitions. Word has length 127 [2020-12-22 07:21:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:28,068 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3791 transitions. [2020-12-22 07:21:28,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3791 transitions. [2020-12-22 07:21:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:21:28,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:28,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:28,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:21:28,071 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:28,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1832413193, now seen corresponding path program 1 times [2020-12-22 07:21:28,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:28,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282284477] [2020-12-22 07:21:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:28,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282284477] [2020-12-22 07:21:28,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:28,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:28,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72952980] [2020-12-22 07:21:28,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:28,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:28,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:28,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:28,219 INFO L87 Difference]: Start difference. First operand 2283 states and 3791 transitions. Second operand 3 states. [2020-12-22 07:21:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:28,364 INFO L93 Difference]: Finished difference Result 6166 states and 10210 transitions. [2020-12-22 07:21:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:28,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:21:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:28,391 INFO L225 Difference]: With dead ends: 6166 [2020-12-22 07:21:28,392 INFO L226 Difference]: Without dead ends: 4103 [2020-12-22 07:21:28,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:28,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2020-12-22 07:21:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 4101. [2020-12-22 07:21:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4101 states. [2020-12-22 07:21:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 6743 transitions. [2020-12-22 07:21:28,589 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 6743 transitions. Word has length 127 [2020-12-22 07:21:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:28,589 INFO L481 AbstractCegarLoop]: Abstraction has 4101 states and 6743 transitions. [2020-12-22 07:21:28,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 6743 transitions. [2020-12-22 07:21:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:21:28,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:28,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:28,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:21:28,593 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1181394736, now seen corresponding path program 1 times [2020-12-22 07:21:28,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:28,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075073166] [2020-12-22 07:21:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:28,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075073166] [2020-12-22 07:21:28,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:28,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:28,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420209229] [2020-12-22 07:21:28,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:28,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:28,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:28,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:28,727 INFO L87 Difference]: Start difference. First operand 4101 states and 6743 transitions. Second operand 3 states. [2020-12-22 07:21:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:28,882 INFO L93 Difference]: Finished difference Result 7700 states and 12696 transitions. [2020-12-22 07:21:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:28,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2020-12-22 07:21:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:28,920 INFO L225 Difference]: With dead ends: 7700 [2020-12-22 07:21:28,920 INFO L226 Difference]: Without dead ends: 5637 [2020-12-22 07:21:28,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:28,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5637 states. [2020-12-22 07:21:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5637 to 5635. [2020-12-22 07:21:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5635 states. [2020-12-22 07:21:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5635 states to 5635 states and 9228 transitions. [2020-12-22 07:21:29,180 INFO L78 Accepts]: Start accepts. Automaton has 5635 states and 9228 transitions. Word has length 130 [2020-12-22 07:21:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:29,181 INFO L481 AbstractCegarLoop]: Abstraction has 5635 states and 9228 transitions. [2020-12-22 07:21:29,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 5635 states and 9228 transitions. [2020-12-22 07:21:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:21:29,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:29,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:29,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:21:29,183 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:29,184 INFO L82 PathProgramCache]: Analyzing trace with hash -163814164, now seen corresponding path program 1 times [2020-12-22 07:21:29,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:29,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930150292] [2020-12-22 07:21:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:29,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930150292] [2020-12-22 07:21:29,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:29,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:29,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704440840] [2020-12-22 07:21:29,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:29,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:29,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:29,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:29,363 INFO L87 Difference]: Start difference. First operand 5635 states and 9228 transitions. Second operand 6 states. [2020-12-22 07:21:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:30,533 INFO L93 Difference]: Finished difference Result 34219 states and 56471 transitions. [2020-12-22 07:21:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:21:30,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 07:21:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:30,651 INFO L225 Difference]: With dead ends: 34219 [2020-12-22 07:21:30,651 INFO L226 Difference]: Without dead ends: 28817 [2020-12-22 07:21:30,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:21:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28817 states. [2020-12-22 07:21:31,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28817 to 10967. [2020-12-22 07:21:31,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10967 states. [2020-12-22 07:21:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 17845 transitions. [2020-12-22 07:21:31,490 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 17845 transitions. Word has length 130 [2020-12-22 07:21:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:31,490 INFO L481 AbstractCegarLoop]: Abstraction has 10967 states and 17845 transitions. [2020-12-22 07:21:31,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:21:31,491 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 17845 transitions. [2020-12-22 07:21:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:21:31,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:31,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:31,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:21:31,493 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:31,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1417088843, now seen corresponding path program 1 times [2020-12-22 07:21:31,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:31,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795869726] [2020-12-22 07:21:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:31,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795869726] [2020-12-22 07:21:31,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:31,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:31,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203397505] [2020-12-22 07:21:31,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:31,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:31,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:31,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:31,715 INFO L87 Difference]: Start difference. First operand 10967 states and 17845 transitions. Second operand 4 states. [2020-12-22 07:21:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:32,538 INFO L93 Difference]: Finished difference Result 32421 states and 53133 transitions. [2020-12-22 07:21:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:32,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 07:21:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:32,593 INFO L225 Difference]: With dead ends: 32421 [2020-12-22 07:21:32,593 INFO L226 Difference]: Without dead ends: 21687 [2020-12-22 07:21:32,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21687 states. [2020-12-22 07:21:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21687 to 18012. [2020-12-22 07:21:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18012 states. [2020-12-22 07:21:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18012 states to 18012 states and 29344 transitions. [2020-12-22 07:21:33,327 INFO L78 Accepts]: Start accepts. Automaton has 18012 states and 29344 transitions. Word has length 131 [2020-12-22 07:21:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:33,327 INFO L481 AbstractCegarLoop]: Abstraction has 18012 states and 29344 transitions. [2020-12-22 07:21:33,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 18012 states and 29344 transitions. [2020-12-22 07:21:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 07:21:33,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:33,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:33,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:21:33,330 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:33,330 INFO L82 PathProgramCache]: Analyzing trace with hash -945521149, now seen corresponding path program 1 times [2020-12-22 07:21:33,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:33,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699828337] [2020-12-22 07:21:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:33,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699828337] [2020-12-22 07:21:33,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:33,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:33,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863551508] [2020-12-22 07:21:33,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:33,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:33,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:33,529 INFO L87 Difference]: Start difference. First operand 18012 states and 29344 transitions. Second operand 4 states. [2020-12-22 07:21:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:34,690 INFO L93 Difference]: Finished difference Result 52879 states and 86403 transitions. [2020-12-22 07:21:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:34,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 07:21:34,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:34,797 INFO L225 Difference]: With dead ends: 52879 [2020-12-22 07:21:34,798 INFO L226 Difference]: Without dead ends: 35100 [2020-12-22 07:21:34,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35100 states. [2020-12-22 07:21:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35100 to 29449. [2020-12-22 07:21:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29449 states. [2020-12-22 07:21:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29449 states to 29449 states and 47793 transitions. [2020-12-22 07:21:36,015 INFO L78 Accepts]: Start accepts. Automaton has 29449 states and 47793 transitions. Word has length 132 [2020-12-22 07:21:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:36,016 INFO L481 AbstractCegarLoop]: Abstraction has 29449 states and 47793 transitions. [2020-12-22 07:21:36,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 29449 states and 47793 transitions. [2020-12-22 07:21:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:21:36,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:36,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:36,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:21:36,018 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:36,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1002982526, now seen corresponding path program 1 times [2020-12-22 07:21:36,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:36,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056946445] [2020-12-22 07:21:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:36,116 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 07:21:36,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056946445] [2020-12-22 07:21:36,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:36,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:36,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150848238] [2020-12-22 07:21:36,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:36,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:36,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:36,119 INFO L87 Difference]: Start difference. First operand 29449 states and 47793 transitions. Second operand 4 states. [2020-12-22 07:21:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:37,706 INFO L93 Difference]: Finished difference Result 85951 states and 139911 transitions. [2020-12-22 07:21:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:37,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 07:21:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:37,845 INFO L225 Difference]: With dead ends: 85951 [2020-12-22 07:21:37,845 INFO L226 Difference]: Without dead ends: 56735 [2020-12-22 07:21:37,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56735 states. [2020-12-22 07:21:39,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56735 to 47894. [2020-12-22 07:21:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47894 states. [2020-12-22 07:21:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47894 states to 47894 states and 77430 transitions. [2020-12-22 07:21:39,827 INFO L78 Accepts]: Start accepts. Automaton has 47894 states and 77430 transitions. Word has length 133 [2020-12-22 07:21:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:39,828 INFO L481 AbstractCegarLoop]: Abstraction has 47894 states and 77430 transitions. [2020-12-22 07:21:39,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 47894 states and 77430 transitions. [2020-12-22 07:21:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:21:39,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:39,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:39,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:21:39,831 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:39,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:39,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1679686426, now seen corresponding path program 1 times [2020-12-22 07:21:39,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:39,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031710231] [2020-12-22 07:21:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:40,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031710231] [2020-12-22 07:21:40,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:40,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:40,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002615408] [2020-12-22 07:21:40,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:40,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:40,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:40,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:40,177 INFO L87 Difference]: Start difference. First operand 47894 states and 77430 transitions. Second operand 4 states. [2020-12-22 07:21:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:42,132 INFO L93 Difference]: Finished difference Result 137703 states and 223323 transitions. [2020-12-22 07:21:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:42,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 07:21:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:42,265 INFO L225 Difference]: With dead ends: 137703 [2020-12-22 07:21:42,265 INFO L226 Difference]: Without dead ends: 90042 [2020-12-22 07:21:42,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90042 states. [2020-12-22 07:21:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90042 to 76943. [2020-12-22 07:21:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76943 states. [2020-12-22 07:21:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76943 states to 76943 states and 123931 transitions. [2020-12-22 07:21:45,044 INFO L78 Accepts]: Start accepts. Automaton has 76943 states and 123931 transitions. Word has length 134 [2020-12-22 07:21:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:45,045 INFO L481 AbstractCegarLoop]: Abstraction has 76943 states and 123931 transitions. [2020-12-22 07:21:45,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 76943 states and 123931 transitions. [2020-12-22 07:21:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:21:45,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:45,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:45,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:21:45,063 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:45,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1349768178, now seen corresponding path program 1 times [2020-12-22 07:21:45,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:45,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491674771] [2020-12-22 07:21:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:45,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491674771] [2020-12-22 07:21:45,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:45,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:21:45,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680122440] [2020-12-22 07:21:45,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:21:45,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:21:45,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:21:45,326 INFO L87 Difference]: Start difference. First operand 76943 states and 123931 transitions. Second operand 6 states. [2020-12-22 07:21:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:48,218 INFO L93 Difference]: Finished difference Result 185517 states and 299643 transitions. [2020-12-22 07:21:48,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:21:48,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2020-12-22 07:21:48,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:48,421 INFO L225 Difference]: With dead ends: 185517 [2020-12-22 07:21:48,421 INFO L226 Difference]: Without dead ends: 108807 [2020-12-22 07:21:48,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:21:48,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108807 states. [2020-12-22 07:21:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108807 to 76943. [2020-12-22 07:21:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76943 states. [2020-12-22 07:21:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76943 states to 76943 states and 123306 transitions. [2020-12-22 07:21:51,298 INFO L78 Accepts]: Start accepts. Automaton has 76943 states and 123306 transitions. Word has length 136 [2020-12-22 07:21:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:51,298 INFO L481 AbstractCegarLoop]: Abstraction has 76943 states and 123306 transitions. [2020-12-22 07:21:51,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:21:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 76943 states and 123306 transitions. [2020-12-22 07:21:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:21:51,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:51,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:51,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:21:51,300 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:51,301 INFO L82 PathProgramCache]: Analyzing trace with hash 412618117, now seen corresponding path program 1 times [2020-12-22 07:21:51,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:51,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778257337] [2020-12-22 07:21:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:51,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778257337] [2020-12-22 07:21:51,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:51,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:51,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304436613] [2020-12-22 07:21:51,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:51,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:51,599 INFO L87 Difference]: Start difference. First operand 76943 states and 123306 transitions. Second operand 4 states. [2020-12-22 07:21:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:55,627 INFO L93 Difference]: Finished difference Result 228942 states and 366846 transitions. [2020-12-22 07:21:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:55,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2020-12-22 07:21:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:55,914 INFO L225 Difference]: With dead ends: 228942 [2020-12-22 07:21:55,914 INFO L226 Difference]: Without dead ends: 152010 [2020-12-22 07:21:56,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152010 states. [2020-12-22 07:22:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152010 to 152008. [2020-12-22 07:22:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152008 states. [2020-12-22 07:22:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152008 states to 152008 states and 242382 transitions. [2020-12-22 07:22:00,789 INFO L78 Accepts]: Start accepts. Automaton has 152008 states and 242382 transitions. Word has length 139 [2020-12-22 07:22:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:00,790 INFO L481 AbstractCegarLoop]: Abstraction has 152008 states and 242382 transitions. [2020-12-22 07:22:00,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 152008 states and 242382 transitions. [2020-12-22 07:22:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:22:00,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:00,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:00,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:22:00,792 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1038580458, now seen corresponding path program 1 times [2020-12-22 07:22:00,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:00,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881927677] [2020-12-22 07:22:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:01,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881927677] [2020-12-22 07:22:01,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:01,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:01,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077038452] [2020-12-22 07:22:01,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:01,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:01,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:01,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:01,374 INFO L87 Difference]: Start difference. First operand 152008 states and 242382 transitions. Second operand 4 states. [2020-12-22 07:22:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:09,277 INFO L93 Difference]: Finished difference Result 452262 states and 721025 transitions. [2020-12-22 07:22:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:09,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2020-12-22 07:22:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:09,815 INFO L225 Difference]: With dead ends: 452262 [2020-12-22 07:22:09,815 INFO L226 Difference]: Without dead ends: 300266 [2020-12-22 07:22:09,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:22:10,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300266 states. [2020-12-22 07:22:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300266 to 300264. [2020-12-22 07:22:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300264 states. [2020-12-22 07:22:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300264 states to 300264 states and 476310 transitions. [2020-12-22 07:22:20,068 INFO L78 Accepts]: Start accepts. Automaton has 300264 states and 476310 transitions. Word has length 141 [2020-12-22 07:22:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:20,070 INFO L481 AbstractCegarLoop]: Abstraction has 300264 states and 476310 transitions. [2020-12-22 07:22:20,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:20,071 INFO L276 IsEmpty]: Start isEmpty. Operand 300264 states and 476310 transitions. [2020-12-22 07:22:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:22:20,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:20,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:20,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:22:20,074 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:20,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1947387771, now seen corresponding path program 1 times [2020-12-22 07:22:20,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:20,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407237331] [2020-12-22 07:22:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:20,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407237331] [2020-12-22 07:22:20,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:20,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:20,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472746129] [2020-12-22 07:22:20,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:20,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:20,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:20,298 INFO L87 Difference]: Start difference. First operand 300264 states and 476310 transitions. Second operand 4 states. [2020-12-22 07:22:37,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:37,565 INFO L93 Difference]: Finished difference Result 893269 states and 1416691 transitions. [2020-12-22 07:22:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:37,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:22:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:39,134 INFO L225 Difference]: With dead ends: 893269 [2020-12-22 07:22:39,135 INFO L226 Difference]: Without dead ends: 593032 [2020-12-22 07:22:39,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:22:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593032 states. [2020-12-22 07:23:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593032 to 593030. [2020-12-22 07:23:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593030 states. [2020-12-22 07:23:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593030 states to 593030 states and 935723 transitions. [2020-12-22 07:23:05,576 INFO L78 Accepts]: Start accepts. Automaton has 593030 states and 935723 transitions. Word has length 143 [2020-12-22 07:23:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:05,577 INFO L481 AbstractCegarLoop]: Abstraction has 593030 states and 935723 transitions. [2020-12-22 07:23:05,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 593030 states and 935723 transitions. [2020-12-22 07:23:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 07:23:05,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:05,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:05,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:23:05,597 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:05,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:05,598 INFO L82 PathProgramCache]: Analyzing trace with hash 380264234, now seen corresponding path program 1 times [2020-12-22 07:23:05,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:05,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732323960] [2020-12-22 07:23:05,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:23:05,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732323960] [2020-12-22 07:23:05,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:05,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:05,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032160273] [2020-12-22 07:23:05,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:05,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:05,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:05,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:05,893 INFO L87 Difference]: Start difference. First operand 593030 states and 935723 transitions. Second operand 4 states. [2020-12-22 07:23:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:47,872 INFO L93 Difference]: Finished difference Result 1763882 states and 2782417 transitions. [2020-12-22 07:23:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:47,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-12-22 07:23:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:52,287 INFO L225 Difference]: With dead ends: 1763882 [2020-12-22 07:23:52,287 INFO L226 Difference]: Without dead ends: 1170988 [2020-12-22 07:23:53,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170988 states.