/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:15:51,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:15:51,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:15:51,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:15:51,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:15:51,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:15:51,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:15:51,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:15:51,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:15:51,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:15:51,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:15:51,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:15:51,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:15:51,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:15:51,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:15:51,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:15:51,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:15:51,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:15:51,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:15:51,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:15:51,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:15:51,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:15:51,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:15:51,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:15:51,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:15:51,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:15:51,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:15:51,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:15:51,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:15:51,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:15:51,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:15:51,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:15:51,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:15:51,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:15:51,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:15:51,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:15:51,608 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:15:51,637 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:15:51,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:15:51,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:15:51,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:15:51,639 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:15:51,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:15:51,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:15:51,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:15:51,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:15:51,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:15:51,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:15:51,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:15:51,641 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:15:51,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:15:51,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:15:51,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:15:51,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:15:51,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:15:51,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:15:51,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:15:51,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:15:51,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:15:51,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:15:51,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:15:51,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:15:51,644 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:15:52,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:15:52,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:15:52,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:15:52,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:15:52,164 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:15:52,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:15:52,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3837df50/8fd34769522843e4935a23fa677072e3/FLAG0c31d7975 [2020-12-22 08:15:52,931 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:15:52,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:15:52,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3837df50/8fd34769522843e4935a23fa677072e3/FLAG0c31d7975 [2020-12-22 08:15:53,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3837df50/8fd34769522843e4935a23fa677072e3 [2020-12-22 08:15:53,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:15:53,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:15:53,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:15:53,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:15:53,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:15:53,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e7b300e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53, skipping insertion in model container [2020-12-22 08:15:53,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:15:53,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:15:53,528 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4007,4020] [2020-12-22 08:15:53,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:15:53,617 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:15:53,701 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4007,4020] [2020-12-22 08:15:53,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:15:53,748 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:15:53,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53 WrapperNode [2020-12-22 08:15:53,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:15:53,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:15:53,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:15:53,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:15:53,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:15:53,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:15:53,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:15:53,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:15:53,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (1/1) ... [2020-12-22 08:15:53,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:15:53,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:15:53,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:15:53,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:15:53,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:15:54,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:15:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:15:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:15:54,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:15:54,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:15:54,939 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:15:54,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:15:54 BoogieIcfgContainer [2020-12-22 08:15:54,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:15:54,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:15:54,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:15:54,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:15:54,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:15:53" (1/3) ... [2020-12-22 08:15:54,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd66d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:15:54, skipping insertion in model container [2020-12-22 08:15:54,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:15:53" (2/3) ... [2020-12-22 08:15:54,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd66d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:15:54, skipping insertion in model container [2020-12-22 08:15:54,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:15:54" (3/3) ... [2020-12-22 08:15:54,958 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:15:54,970 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:15:54,976 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:15:55,031 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:15:55,061 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:15:55,061 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:15:55,061 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:15:55,061 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:15:55,061 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:15:55,062 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:15:55,062 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:15:55,062 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:15:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-12-22 08:15:55,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 08:15:55,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:55,107 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] [2020-12-22 08:15:55,107 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash 716810707, now seen corresponding path program 1 times [2020-12-22 08:15:55,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:55,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504681385] [2020-12-22 08:15:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:55,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504681385] [2020-12-22 08:15:55,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:55,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:55,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885858013] [2020-12-22 08:15:55,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:55,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:55,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:55,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:55,523 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 3 states. [2020-12-22 08:15:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:55,601 INFO L93 Difference]: Finished difference Result 205 states and 324 transitions. [2020-12-22 08:15:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:55,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 08:15:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:55,616 INFO L225 Difference]: With dead ends: 205 [2020-12-22 08:15:55,616 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 08:15:55,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 08:15:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-12-22 08:15:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 08:15:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 194 transitions. [2020-12-22 08:15:55,678 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 194 transitions. Word has length 38 [2020-12-22 08:15:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:55,679 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 194 transitions. [2020-12-22 08:15:55,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 194 transitions. [2020-12-22 08:15:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 08:15:55,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:55,681 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] [2020-12-22 08:15:55,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:15:55,682 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:55,683 INFO L82 PathProgramCache]: Analyzing trace with hash -935293361, now seen corresponding path program 1 times [2020-12-22 08:15:55,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:55,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474543267] [2020-12-22 08:15:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:55,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474543267] [2020-12-22 08:15:55,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:55,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:55,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880351488] [2020-12-22 08:15:55,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:55,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:55,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:55,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:55,813 INFO L87 Difference]: Start difference. First operand 130 states and 194 transitions. Second operand 3 states. [2020-12-22 08:15:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:55,924 INFO L93 Difference]: Finished difference Result 318 states and 490 transitions. [2020-12-22 08:15:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:55,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-12-22 08:15:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:55,931 INFO L225 Difference]: With dead ends: 318 [2020-12-22 08:15:55,932 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 08:15:55,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 08:15:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2020-12-22 08:15:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-22 08:15:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 313 transitions. [2020-12-22 08:15:55,994 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 313 transitions. Word has length 39 [2020-12-22 08:15:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:55,997 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 313 transitions. [2020-12-22 08:15:55,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 313 transitions. [2020-12-22 08:15:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 08:15:55,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:55,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:56,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:15:56,000 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash 830312666, now seen corresponding path program 1 times [2020-12-22 08:15:56,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:56,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766330711] [2020-12-22 08:15:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:56,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766330711] [2020-12-22 08:15:56,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:56,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:56,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953959957] [2020-12-22 08:15:56,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:56,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:56,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:56,251 INFO L87 Difference]: Start difference. First operand 206 states and 313 transitions. Second operand 5 states. [2020-12-22 08:15:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:56,401 INFO L93 Difference]: Finished difference Result 688 states and 1068 transitions. [2020-12-22 08:15:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:56,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 08:15:56,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:56,408 INFO L225 Difference]: With dead ends: 688 [2020-12-22 08:15:56,408 INFO L226 Difference]: Without dead ends: 502 [2020-12-22 08:15:56,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-12-22 08:15:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 498. [2020-12-22 08:15:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-12-22 08:15:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 769 transitions. [2020-12-22 08:15:56,472 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 769 transitions. Word has length 40 [2020-12-22 08:15:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:56,473 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 769 transitions. [2020-12-22 08:15:56,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:56,473 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 769 transitions. [2020-12-22 08:15:56,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 08:15:56,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:56,475 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] [2020-12-22 08:15:56,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:15:56,475 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:56,476 INFO L82 PathProgramCache]: Analyzing trace with hash 604365756, now seen corresponding path program 1 times [2020-12-22 08:15:56,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:56,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470224992] [2020-12-22 08:15:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:56,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470224992] [2020-12-22 08:15:56,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:56,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:56,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955139003] [2020-12-22 08:15:56,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:56,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:56,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:56,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:56,618 INFO L87 Difference]: Start difference. First operand 498 states and 769 transitions. Second operand 3 states. [2020-12-22 08:15:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:56,692 INFO L93 Difference]: Finished difference Result 1258 states and 1951 transitions. [2020-12-22 08:15:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:15:56,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 08:15:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:56,698 INFO L225 Difference]: With dead ends: 1258 [2020-12-22 08:15:56,698 INFO L226 Difference]: Without dead ends: 780 [2020-12-22 08:15:56,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-12-22 08:15:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 778. [2020-12-22 08:15:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-12-22 08:15:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1189 transitions. [2020-12-22 08:15:56,761 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1189 transitions. Word has length 41 [2020-12-22 08:15:56,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:56,762 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1189 transitions. [2020-12-22 08:15:56,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:15:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1189 transitions. [2020-12-22 08:15:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 08:15:56,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:56,764 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] [2020-12-22 08:15:56,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:15:56,764 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash 608060849, now seen corresponding path program 1 times [2020-12-22 08:15:56,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:56,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120397201] [2020-12-22 08:15:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:56,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120397201] [2020-12-22 08:15:56,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:56,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:15:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938626569] [2020-12-22 08:15:56,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:56,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:56,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:56,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:56,848 INFO L87 Difference]: Start difference. First operand 778 states and 1189 transitions. Second operand 5 states. [2020-12-22 08:15:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:57,330 INFO L93 Difference]: Finished difference Result 2294 states and 3527 transitions. [2020-12-22 08:15:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:57,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 08:15:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:57,342 INFO L225 Difference]: With dead ends: 2294 [2020-12-22 08:15:57,342 INFO L226 Difference]: Without dead ends: 1536 [2020-12-22 08:15:57,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:15:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2020-12-22 08:15:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1534. [2020-12-22 08:15:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1534 states. [2020-12-22 08:15:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2337 transitions. [2020-12-22 08:15:57,511 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2337 transitions. Word has length 42 [2020-12-22 08:15:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:57,511 INFO L481 AbstractCegarLoop]: Abstraction has 1534 states and 2337 transitions. [2020-12-22 08:15:57,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2337 transitions. [2020-12-22 08:15:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 08:15:57,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:57,514 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] [2020-12-22 08:15:57,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:15:57,514 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:57,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:57,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1912062484, now seen corresponding path program 1 times [2020-12-22 08:15:57,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:57,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860400953] [2020-12-22 08:15:57,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:57,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860400953] [2020-12-22 08:15:57,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:57,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:57,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979305300] [2020-12-22 08:15:57,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:57,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:57,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:57,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:57,613 INFO L87 Difference]: Start difference. First operand 1534 states and 2337 transitions. Second operand 5 states. [2020-12-22 08:15:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:58,074 INFO L93 Difference]: Finished difference Result 6174 states and 9429 transitions. [2020-12-22 08:15:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:15:58,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 08:15:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:58,101 INFO L225 Difference]: With dead ends: 6174 [2020-12-22 08:15:58,101 INFO L226 Difference]: Without dead ends: 4660 [2020-12-22 08:15:58,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2020-12-22 08:15:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 3046. [2020-12-22 08:15:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3046 states. [2020-12-22 08:15:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 4557 transitions. [2020-12-22 08:15:58,432 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 4557 transitions. Word has length 42 [2020-12-22 08:15:58,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:58,432 INFO L481 AbstractCegarLoop]: Abstraction has 3046 states and 4557 transitions. [2020-12-22 08:15:58,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 4557 transitions. [2020-12-22 08:15:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 08:15:58,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:58,440 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] [2020-12-22 08:15:58,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:15:58,440 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:58,442 INFO L82 PathProgramCache]: Analyzing trace with hash 836148826, now seen corresponding path program 1 times [2020-12-22 08:15:58,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:58,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524706422] [2020-12-22 08:15:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:58,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524706422] [2020-12-22 08:15:58,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:58,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:15:58,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55083269] [2020-12-22 08:15:58,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:15:58,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:58,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:15:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:15:58,591 INFO L87 Difference]: Start difference. First operand 3046 states and 4557 transitions. Second operand 5 states. [2020-12-22 08:15:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:59,141 INFO L93 Difference]: Finished difference Result 6264 states and 9286 transitions. [2020-12-22 08:15:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:15:59,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 08:15:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:59,175 INFO L225 Difference]: With dead ends: 6264 [2020-12-22 08:15:59,175 INFO L226 Difference]: Without dead ends: 6262 [2020-12-22 08:15:59,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6262 states. [2020-12-22 08:15:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6262 to 3238. [2020-12-22 08:15:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3238 states. [2020-12-22 08:15:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 4749 transitions. [2020-12-22 08:15:59,573 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 4749 transitions. Word has length 43 [2020-12-22 08:15:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:59,574 INFO L481 AbstractCegarLoop]: Abstraction has 3238 states and 4749 transitions. [2020-12-22 08:15:59,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:15:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 4749 transitions. [2020-12-22 08:15:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 08:15:59,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:59,576 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] [2020-12-22 08:15:59,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:15:59,577 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:59,578 INFO L82 PathProgramCache]: Analyzing trace with hash 161382844, now seen corresponding path program 1 times [2020-12-22 08:15:59,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:59,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543450461] [2020-12-22 08:15:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:15:59,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543450461] [2020-12-22 08:15:59,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:59,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:15:59,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953095202] [2020-12-22 08:15:59,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:15:59,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:59,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:15:59,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:15:59,675 INFO L87 Difference]: Start difference. First operand 3238 states and 4749 transitions. Second operand 3 states. [2020-12-22 08:16:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:00,062 INFO L93 Difference]: Finished difference Result 7168 states and 10493 transitions. [2020-12-22 08:16:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:00,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-22 08:16:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:00,085 INFO L225 Difference]: With dead ends: 7168 [2020-12-22 08:16:00,085 INFO L226 Difference]: Without dead ends: 3950 [2020-12-22 08:16:00,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2020-12-22 08:16:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3928. [2020-12-22 08:16:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-12-22 08:16:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5703 transitions. [2020-12-22 08:16:00,471 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5703 transitions. Word has length 44 [2020-12-22 08:16:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:00,473 INFO L481 AbstractCegarLoop]: Abstraction has 3928 states and 5703 transitions. [2020-12-22 08:16:00,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5703 transitions. [2020-12-22 08:16:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:16:00,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:00,477 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:00,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:16:00,477 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:00,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:00,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1477612707, now seen corresponding path program 1 times [2020-12-22 08:16:00,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:00,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272488780] [2020-12-22 08:16:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:00,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272488780] [2020-12-22 08:16:00,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:00,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:00,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924649218] [2020-12-22 08:16:00,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:00,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:00,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:00,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:00,560 INFO L87 Difference]: Start difference. First operand 3928 states and 5703 transitions. Second operand 3 states. [2020-12-22 08:16:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:01,169 INFO L93 Difference]: Finished difference Result 9069 states and 13163 transitions. [2020-12-22 08:16:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:01,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:16:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:01,212 INFO L225 Difference]: With dead ends: 9069 [2020-12-22 08:16:01,212 INFO L226 Difference]: Without dead ends: 6251 [2020-12-22 08:16:01,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2020-12-22 08:16:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 6249. [2020-12-22 08:16:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6249 states. [2020-12-22 08:16:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6249 states to 6249 states and 8949 transitions. [2020-12-22 08:16:01,829 INFO L78 Accepts]: Start accepts. Automaton has 6249 states and 8949 transitions. Word has length 63 [2020-12-22 08:16:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:01,829 INFO L481 AbstractCegarLoop]: Abstraction has 6249 states and 8949 transitions. [2020-12-22 08:16:01,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 6249 states and 8949 transitions. [2020-12-22 08:16:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:16:01,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:01,834 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:01,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:16:01,834 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:01,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1700716252, now seen corresponding path program 1 times [2020-12-22 08:16:01,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:01,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615733483] [2020-12-22 08:16:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:02,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615733483] [2020-12-22 08:16:02,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001317443] [2020-12-22 08:16:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:16:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:02,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 08:16:02,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:16:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:16:02,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:16:02,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 08:16:02,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3096936] [2020-12-22 08:16:02,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:16:02,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:02,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:16:02,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:16:02,716 INFO L87 Difference]: Start difference. First operand 6249 states and 8949 transitions. Second operand 12 states. [2020-12-22 08:16:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:12,210 INFO L93 Difference]: Finished difference Result 45661 states and 64084 transitions. [2020-12-22 08:16:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 08:16:12,211 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-12-22 08:16:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:12,318 INFO L225 Difference]: With dead ends: 45661 [2020-12-22 08:16:12,318 INFO L226 Difference]: Without dead ends: 39947 [2020-12-22 08:16:12,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2815 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1361, Invalid=5949, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 08:16:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39947 states. [2020-12-22 08:16:14,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39947 to 16731. [2020-12-22 08:16:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16731 states. [2020-12-22 08:16:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16731 states to 16731 states and 23456 transitions. [2020-12-22 08:16:14,708 INFO L78 Accepts]: Start accepts. Automaton has 16731 states and 23456 transitions. Word has length 63 [2020-12-22 08:16:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:14,708 INFO L481 AbstractCegarLoop]: Abstraction has 16731 states and 23456 transitions. [2020-12-22 08:16:14,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:16:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 16731 states and 23456 transitions. [2020-12-22 08:16:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:16:14,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:14,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:15,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 08:16:15,018 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:15,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1091273178, now seen corresponding path program 1 times [2020-12-22 08:16:15,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:15,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241543140] [2020-12-22 08:16:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 08:16:15,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241543140] [2020-12-22 08:16:15,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:15,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:15,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904778638] [2020-12-22 08:16:15,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:16:15,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:15,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:16:15,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:16:15,112 INFO L87 Difference]: Start difference. First operand 16731 states and 23456 transitions. Second operand 5 states. [2020-12-22 08:16:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:16,911 INFO L93 Difference]: Finished difference Result 29639 states and 41875 transitions. [2020-12-22 08:16:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:16,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:16:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:16,966 INFO L225 Difference]: With dead ends: 29639 [2020-12-22 08:16:16,967 INFO L226 Difference]: Without dead ends: 22656 [2020-12-22 08:16:16,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22656 states. [2020-12-22 08:16:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22656 to 21348. [2020-12-22 08:16:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21348 states. [2020-12-22 08:16:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21348 states to 21348 states and 29819 transitions. [2020-12-22 08:16:19,479 INFO L78 Accepts]: Start accepts. Automaton has 21348 states and 29819 transitions. Word has length 63 [2020-12-22 08:16:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:19,479 INFO L481 AbstractCegarLoop]: Abstraction has 21348 states and 29819 transitions. [2020-12-22 08:16:19,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:16:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 21348 states and 29819 transitions. [2020-12-22 08:16:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:16:19,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:19,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:19,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:16:19,486 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:19,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1327011341, now seen corresponding path program 1 times [2020-12-22 08:16:19,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:19,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801219799] [2020-12-22 08:16:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:19,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801219799] [2020-12-22 08:16:19,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:19,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:19,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696677189] [2020-12-22 08:16:19,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:19,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:19,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:19,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:19,545 INFO L87 Difference]: Start difference. First operand 21348 states and 29819 transitions. Second operand 3 states. [2020-12-22 08:16:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:21,881 INFO L93 Difference]: Finished difference Result 36875 states and 51396 transitions. [2020-12-22 08:16:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:21,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:16:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:21,922 INFO L225 Difference]: With dead ends: 36875 [2020-12-22 08:16:21,922 INFO L226 Difference]: Without dead ends: 22332 [2020-12-22 08:16:21,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22332 states. [2020-12-22 08:16:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22332 to 21455. [2020-12-22 08:16:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21455 states. [2020-12-22 08:16:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21455 states to 21455 states and 29437 transitions. [2020-12-22 08:16:23,917 INFO L78 Accepts]: Start accepts. Automaton has 21455 states and 29437 transitions. Word has length 63 [2020-12-22 08:16:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:23,917 INFO L481 AbstractCegarLoop]: Abstraction has 21455 states and 29437 transitions. [2020-12-22 08:16:23,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 21455 states and 29437 transitions. [2020-12-22 08:16:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:16:23,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:23,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:23,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:16:23,922 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:23,922 INFO L82 PathProgramCache]: Analyzing trace with hash 161019487, now seen corresponding path program 1 times [2020-12-22 08:16:23,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:23,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888045487] [2020-12-22 08:16:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:16:23,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888045487] [2020-12-22 08:16:23,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:23,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:24,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821179907] [2020-12-22 08:16:24,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:16:24,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:24,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:16:24,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:16:24,010 INFO L87 Difference]: Start difference. First operand 21455 states and 29437 transitions. Second operand 6 states. [2020-12-22 08:16:29,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:29,114 INFO L93 Difference]: Finished difference Result 73798 states and 100676 transitions. [2020-12-22 08:16:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:29,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-12-22 08:16:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:29,208 INFO L225 Difference]: With dead ends: 73798 [2020-12-22 08:16:29,209 INFO L226 Difference]: Without dead ends: 52430 [2020-12-22 08:16:29,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:16:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52430 states. [2020-12-22 08:16:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52430 to 51998. [2020-12-22 08:16:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51998 states. [2020-12-22 08:16:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51998 states to 51998 states and 70570 transitions. [2020-12-22 08:16:34,567 INFO L78 Accepts]: Start accepts. Automaton has 51998 states and 70570 transitions. Word has length 63 [2020-12-22 08:16:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:34,568 INFO L481 AbstractCegarLoop]: Abstraction has 51998 states and 70570 transitions. [2020-12-22 08:16:34,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:16:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 51998 states and 70570 transitions. [2020-12-22 08:16:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:16:34,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:34,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:34,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:16:34,574 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:34,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:34,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1235936444, now seen corresponding path program 1 times [2020-12-22 08:16:34,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:34,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14397118] [2020-12-22 08:16:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 08:16:34,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14397118] [2020-12-22 08:16:34,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:34,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:34,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104123731] [2020-12-22 08:16:34,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:16:34,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:34,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:16:34,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:16:34,651 INFO L87 Difference]: Start difference. First operand 51998 states and 70570 transitions. Second operand 5 states. [2020-12-22 08:16:40,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:40,176 INFO L93 Difference]: Finished difference Result 72154 states and 98941 transitions. [2020-12-22 08:16:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:40,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:16:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:40,269 INFO L225 Difference]: With dead ends: 72154 [2020-12-22 08:16:40,269 INFO L226 Difference]: Without dead ends: 64891 [2020-12-22 08:16:40,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:16:40,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64891 states. [2020-12-22 08:16:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64891 to 59035. [2020-12-22 08:16:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59035 states. [2020-12-22 08:16:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59035 states to 59035 states and 80297 transitions. [2020-12-22 08:16:46,315 INFO L78 Accepts]: Start accepts. Automaton has 59035 states and 80297 transitions. Word has length 63 [2020-12-22 08:16:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:46,315 INFO L481 AbstractCegarLoop]: Abstraction has 59035 states and 80297 transitions. [2020-12-22 08:16:46,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:16:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 59035 states and 80297 transitions. [2020-12-22 08:16:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:16:46,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:46,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:46,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:16:46,322 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:46,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1004794437, now seen corresponding path program 1 times [2020-12-22 08:16:46,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:46,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13713085] [2020-12-22 08:16:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:16:46,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13713085] [2020-12-22 08:16:46,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:46,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:46,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897527193] [2020-12-22 08:16:46,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:46,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:46,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:46,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:46,365 INFO L87 Difference]: Start difference. First operand 59035 states and 80297 transitions. Second operand 3 states. [2020-12-22 08:16:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:51,794 INFO L93 Difference]: Finished difference Result 89067 states and 120758 transitions. [2020-12-22 08:16:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:51,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:16:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:51,870 INFO L225 Difference]: With dead ends: 89067 [2020-12-22 08:16:51,870 INFO L226 Difference]: Without dead ends: 59054 [2020-12-22 08:16:51,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59054 states. [2020-12-22 08:16:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59054 to 53715. [2020-12-22 08:16:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53715 states. [2020-12-22 08:16:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53715 states to 53715 states and 72445 transitions. [2020-12-22 08:16:57,246 INFO L78 Accepts]: Start accepts. Automaton has 53715 states and 72445 transitions. Word has length 64 [2020-12-22 08:16:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:57,246 INFO L481 AbstractCegarLoop]: Abstraction has 53715 states and 72445 transitions. [2020-12-22 08:16:57,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 53715 states and 72445 transitions. [2020-12-22 08:16:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:16:57,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:57,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:16:57,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:16:57,252 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:57,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1607670003, now seen corresponding path program 1 times [2020-12-22 08:16:57,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:57,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110546841] [2020-12-22 08:16:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:16:57,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110546841] [2020-12-22 08:16:57,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:57,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:57,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690297855] [2020-12-22 08:16:57,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:16:57,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:57,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:16:57,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:16:57,340 INFO L87 Difference]: Start difference. First operand 53715 states and 72445 transitions. Second operand 5 states. [2020-12-22 08:17:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:03,602 INFO L93 Difference]: Finished difference Result 70932 states and 96465 transitions. [2020-12-22 08:17:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:03,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 08:17:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:03,674 INFO L225 Difference]: With dead ends: 70932 [2020-12-22 08:17:03,675 INFO L226 Difference]: Without dead ends: 62193 [2020-12-22 08:17:03,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62193 states. [2020-12-22 08:17:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62193 to 59567. [2020-12-22 08:17:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59567 states. [2020-12-22 08:17:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59567 states to 59567 states and 80278 transitions. [2020-12-22 08:17:09,891 INFO L78 Accepts]: Start accepts. Automaton has 59567 states and 80278 transitions. Word has length 65 [2020-12-22 08:17:09,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:09,891 INFO L481 AbstractCegarLoop]: Abstraction has 59567 states and 80278 transitions. [2020-12-22 08:17:09,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 59567 states and 80278 transitions. [2020-12-22 08:17:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:17:09,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:09,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:09,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:17:09,898 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:09,899 INFO L82 PathProgramCache]: Analyzing trace with hash 254858913, now seen corresponding path program 1 times [2020-12-22 08:17:09,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:09,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004207014] [2020-12-22 08:17:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:17:09,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004207014] [2020-12-22 08:17:09,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:09,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:09,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560745462] [2020-12-22 08:17:09,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:09,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:09,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:09,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:09,948 INFO L87 Difference]: Start difference. First operand 59567 states and 80278 transitions. Second operand 3 states. [2020-12-22 08:17:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:18,472 INFO L93 Difference]: Finished difference Result 127588 states and 171724 transitions. [2020-12-22 08:17:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:18,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 08:17:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:18,576 INFO L225 Difference]: With dead ends: 127588 [2020-12-22 08:17:18,577 INFO L226 Difference]: Without dead ends: 82551 [2020-12-22 08:17:18,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82551 states. [2020-12-22 08:17:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82551 to 82549. [2020-12-22 08:17:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82549 states. [2020-12-22 08:17:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82549 states to 82549 states and 109562 transitions. [2020-12-22 08:17:27,316 INFO L78 Accepts]: Start accepts. Automaton has 82549 states and 109562 transitions. Word has length 66 [2020-12-22 08:17:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:27,316 INFO L481 AbstractCegarLoop]: Abstraction has 82549 states and 109562 transitions. [2020-12-22 08:17:27,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 82549 states and 109562 transitions. [2020-12-22 08:17:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:17:27,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:27,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:27,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:17:27,327 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:27,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:27,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2033011702, now seen corresponding path program 1 times [2020-12-22 08:17:27,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:27,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018876237] [2020-12-22 08:17:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:17:27,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018876237] [2020-12-22 08:17:27,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:27,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:27,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960623723] [2020-12-22 08:17:27,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:17:27,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:27,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:17:27,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:17:27,399 INFO L87 Difference]: Start difference. First operand 82549 states and 109562 transitions. Second operand 6 states. [2020-12-22 08:17:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:47,587 INFO L93 Difference]: Finished difference Result 277378 states and 366154 transitions. [2020-12-22 08:17:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:47,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 08:17:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:48,107 INFO L225 Difference]: With dead ends: 277378 [2020-12-22 08:17:48,107 INFO L226 Difference]: Without dead ends: 194886 [2020-12-22 08:17:48,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:17:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194886 states. [2020-12-22 08:18:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194886 to 193293. [2020-12-22 08:18:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193293 states. [2020-12-22 08:18:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193293 states to 193293 states and 253611 transitions. [2020-12-22 08:18:09,423 INFO L78 Accepts]: Start accepts. Automaton has 193293 states and 253611 transitions. Word has length 68 [2020-12-22 08:18:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:09,424 INFO L481 AbstractCegarLoop]: Abstraction has 193293 states and 253611 transitions. [2020-12-22 08:18:09,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:18:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 193293 states and 253611 transitions. [2020-12-22 08:18:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:18:09,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:09,446 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:09,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:18:09,447 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:09,447 INFO L82 PathProgramCache]: Analyzing trace with hash -767181137, now seen corresponding path program 1 times [2020-12-22 08:18:09,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:09,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431966857] [2020-12-22 08:18:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:18:09,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431966857] [2020-12-22 08:18:09,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600078575] [2020-12-22 08:18:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:18:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 08:18:09,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:18:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:18:09,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:18:09,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 08:18:09,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692701329] [2020-12-22 08:18:09,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:18:09,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:09,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:18:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:18:09,850 INFO L87 Difference]: Start difference. First operand 193293 states and 253611 transitions. Second operand 11 states. [2020-12-22 08:18:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:51,905 INFO L93 Difference]: Finished difference Result 483222 states and 633070 transitions. [2020-12-22 08:18:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:18:51,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-12-22 08:18:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:52,717 INFO L225 Difference]: With dead ends: 483222 [2020-12-22 08:18:52,717 INFO L226 Difference]: Without dead ends: 342935 [2020-12-22 08:18:52,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:18:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342935 states.