/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/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:33:17,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:33:17,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:33:17,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:33:17,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:33:17,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:33:17,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:33:17,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:33:17,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:33:17,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:33:17,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:33:17,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:33:17,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:33:17,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:33:17,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:33:17,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:33:17,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:33:17,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:33:17,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:33:17,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:33:17,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:33:17,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:33:17,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:33:17,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:33:17,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:33:17,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:33:17,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:33:17,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:33:17,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:33:17,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:33:17,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:33:17,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:33:17,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:33:17,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:33:17,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:33:17,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:33:17,445 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:33:17,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:33:17,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:33:17,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:33:17,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:33:17,475 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:33:17,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:33:17,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:33:17,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:33:17,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:33:17,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:33:17,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:33:17,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:33:17,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:33:17,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:33:17,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:33:17,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:33:17,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:33:17,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:33:17,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:33:17,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:33:17,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:33:17,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:33:17,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:33:17,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:33:17,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:33:17,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:33:17,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:33:18,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:33:18,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:33:18,009 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:33:18,010 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:33:18,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label02.c [2020-12-22 09:33:18,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d036fdf4c/8175fd7a0ac949cd986d842d0b3f7646/FLAGb21a48750 [2020-12-22 09:33:19,158 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:33:19,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label02.c [2020-12-22 09:33:19,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d036fdf4c/8175fd7a0ac949cd986d842d0b3f7646/FLAGb21a48750 [2020-12-22 09:33:19,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d036fdf4c/8175fd7a0ac949cd986d842d0b3f7646 [2020-12-22 09:33:19,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:33:19,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:33:19,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:33:19,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:33:19,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:33:19,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:33:19" (1/1) ... [2020-12-22 09:33:19,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e763f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:19, skipping insertion in model container [2020-12-22 09:33:19,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:33:19" (1/1) ... [2020-12-22 09:33:19,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:33:19,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:33:20,248 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/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label02.c[6449,6462] [2020-12-22 09:33:20,373 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/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label02.c[13496,13509] [2020-12-22 09:33:21,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:33:21,502 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:33:21,568 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/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label02.c[6449,6462] [2020-12-22 09:33:21,585 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/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label02.c[13496,13509] [2020-12-22 09:33:22,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:33:22,281 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:33:22,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22 WrapperNode [2020-12-22 09:33:22,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:33:22,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:33:22,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:33:22,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:33:22,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (1/1) ... [2020-12-22 09:33:22,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (1/1) ... [2020-12-22 09:33:22,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:33:22,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:33:22,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:33:22,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:33:22,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (1/1) ... [2020-12-22 09:33:22,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (1/1) ... [2020-12-22 09:33:22,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (1/1) ... [2020-12-22 09:33:22,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (1/1) ... [2020-12-22 09:33:23,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (1/1) ... [2020-12-22 09:33:23,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (1/1) ... [2020-12-22 09:33:23,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (1/1) ... [2020-12-22 09:33:23,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:33:23,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:33:23,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:33:23,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:33:23,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:33:23,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:33:23,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:33:23,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:33:23,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:33:28,888 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:33:28,889 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 09:33:28,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:33:28 BoogieIcfgContainer [2020-12-22 09:33:28,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:33:28,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:33:28,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:33:28,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:33:28,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:33:19" (1/3) ... [2020-12-22 09:33:28,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3216aa6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:33:28, skipping insertion in model container [2020-12-22 09:33:28,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:22" (2/3) ... [2020-12-22 09:33:28,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3216aa6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:33:28, skipping insertion in model container [2020-12-22 09:33:28,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:33:28" (3/3) ... [2020-12-22 09:33:28,903 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label02.c [2020-12-22 09:33:28,910 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:33:28,916 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:33:28,935 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:33:28,984 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:33:28,986 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:33:28,986 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:33:28,986 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:33:28,986 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:33:28,986 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:33:28,987 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:33:28,987 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:33:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states. [2020-12-22 09:33:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:33:29,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:29,044 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] [2020-12-22 09:33:29,045 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2020-12-22 09:33:29,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:29,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584013435] [2020-12-22 09:33:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:29,335 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 09:33:29,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584013435] [2020-12-22 09:33:29,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:29,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:33:29,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127601702] [2020-12-22 09:33:29,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:33:29,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:29,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:33:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:33:29,361 INFO L87 Difference]: Start difference. First operand 878 states. Second operand 2 states. [2020-12-22 09:33:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:29,451 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2020-12-22 09:33:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:33:29,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:33:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:29,476 INFO L225 Difference]: With dead ends: 1734 [2020-12-22 09:33:29,477 INFO L226 Difference]: Without dead ends: 812 [2020-12-22 09:33:29,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:33:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-12-22 09:33:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2020-12-22 09:33:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 09:33:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2020-12-22 09:33:29,583 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2020-12-22 09:33:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:29,583 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2020-12-22 09:33:29,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:33:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2020-12-22 09:33:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:33:29,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:29,585 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] [2020-12-22 09:33:29,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:33:29,586 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:29,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:29,587 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:33:29,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:29,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627877915] [2020-12-22 09:33:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:29,698 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 09:33:29,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627877915] [2020-12-22 09:33:29,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:29,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:29,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593314238] [2020-12-22 09:33:29,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:29,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:29,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:29,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:29,702 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand 5 states. [2020-12-22 09:33:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:29,802 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2020-12-22 09:33:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:33:29,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:33:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:29,808 INFO L225 Difference]: With dead ends: 888 [2020-12-22 09:33:29,809 INFO L226 Difference]: Without dead ends: 848 [2020-12-22 09:33:29,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:33:29,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-12-22 09:33:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2020-12-22 09:33:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 09:33:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2020-12-22 09:33:29,832 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2020-12-22 09:33:29,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:29,832 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2020-12-22 09:33:29,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2020-12-22 09:33:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:33:29,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:29,834 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 09:33:29,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:33:29,835 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:29,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:33:29,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:29,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481156695] [2020-12-22 09:33:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:29,967 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 09:33:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481156695] [2020-12-22 09:33:29,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:29,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:29,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176744765] [2020-12-22 09:33:29,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:29,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:29,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:29,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:29,970 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand 3 states. [2020-12-22 09:33:30,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:30,006 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2020-12-22 09:33:30,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:30,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:33:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:30,012 INFO L225 Difference]: With dead ends: 878 [2020-12-22 09:33:30,012 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:33:30,013 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 09:33:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:33:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2020-12-22 09:33:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-12-22 09:33:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2020-12-22 09:33:30,037 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2020-12-22 09:33:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:30,037 INFO L481 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2020-12-22 09:33:30,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2020-12-22 09:33:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:33:30,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:30,039 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 09:33:30,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:33:30,040 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:30,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:33:30,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:30,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536281536] [2020-12-22 09:33:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:30,149 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 09:33:30,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536281536] [2020-12-22 09:33:30,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:30,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:30,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127083271] [2020-12-22 09:33:30,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:30,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:30,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:30,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:30,154 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand 5 states. [2020-12-22 09:33:30,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:30,333 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2020-12-22 09:33:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:33:30,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:33:30,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:30,341 INFO L225 Difference]: With dead ends: 1224 [2020-12-22 09:33:30,341 INFO L226 Difference]: Without dead ends: 1160 [2020-12-22 09:33:30,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:33:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2020-12-22 09:33:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2020-12-22 09:33:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902 states. [2020-12-22 09:33:30,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2020-12-22 09:33:30,380 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2020-12-22 09:33:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:30,381 INFO L481 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2020-12-22 09:33:30,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2020-12-22 09:33:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:30,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:30,388 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 09:33:30,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:33:30,388 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:30,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:30,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:33:30,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:30,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249100829] [2020-12-22 09:33:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:30,525 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 09:33:30,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249100829] [2020-12-22 09:33:30,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:30,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:30,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369831733] [2020-12-22 09:33:30,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:30,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:30,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:30,529 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand 3 states. [2020-12-22 09:33:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:30,590 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2020-12-22 09:33:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:30,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:33:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:30,598 INFO L225 Difference]: With dead ends: 1089 [2020-12-22 09:33:30,598 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 09:33:30,599 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 09:33:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 09:33:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2020-12-22 09:33:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-22 09:33:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2020-12-22 09:33:30,637 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2020-12-22 09:33:30,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:30,639 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2020-12-22 09:33:30,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2020-12-22 09:33:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:30,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:30,641 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 09:33:30,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:33:30,642 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:30,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:30,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:33:30,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:30,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575238044] [2020-12-22 09:33:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:30,816 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 09:33:30,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575238044] [2020-12-22 09:33:30,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:30,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455609562] [2020-12-22 09:33:30,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:30,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:30,820 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand 5 states. [2020-12-22 09:33:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:30,947 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2020-12-22 09:33:30,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:30,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:33:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:30,955 INFO L225 Difference]: With dead ends: 1146 [2020-12-22 09:33:30,955 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 09:33:30,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:33:30,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 09:33:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2020-12-22 09:33:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-22 09:33:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2020-12-22 09:33:30,990 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2020-12-22 09:33:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:30,991 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2020-12-22 09:33:30,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2020-12-22 09:33:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:30,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:30,994 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 09:33:30,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:33:30,995 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:30,999 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:33:30,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:30,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652358090] [2020-12-22 09:33:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:31,091 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 09:33:31,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652358090] [2020-12-22 09:33:31,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:31,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2741482] [2020-12-22 09:33:31,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:31,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:31,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:31,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:31,096 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand 3 states. [2020-12-22 09:33:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:31,211 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2020-12-22 09:33:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:31,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:33:31,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:31,220 INFO L225 Difference]: With dead ends: 1291 [2020-12-22 09:33:31,221 INFO L226 Difference]: Without dead ends: 1108 [2020-12-22 09:33:31,223 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 09:33:31,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2020-12-22 09:33:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2020-12-22 09:33:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1106 states. [2020-12-22 09:33:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2020-12-22 09:33:31,265 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2020-12-22 09:33:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:31,265 INFO L481 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2020-12-22 09:33:31,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2020-12-22 09:33:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:31,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:31,266 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 09:33:31,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:33:31,267 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:31,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:33:31,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:31,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705884063] [2020-12-22 09:33:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:31,313 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 09:33:31,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705884063] [2020-12-22 09:33:31,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:31,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:31,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54256425] [2020-12-22 09:33:31,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:31,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:31,316 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand 3 states. [2020-12-22 09:33:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:31,374 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2020-12-22 09:33:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:31,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:33:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:31,384 INFO L225 Difference]: With dead ends: 1690 [2020-12-22 09:33:31,384 INFO L226 Difference]: Without dead ends: 1362 [2020-12-22 09:33:31,385 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 09:33:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2020-12-22 09:33:31,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2020-12-22 09:33:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2020-12-22 09:33:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2020-12-22 09:33:31,443 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2020-12-22 09:33:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:31,443 INFO L481 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2020-12-22 09:33:31,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2020-12-22 09:33:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:33:31,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:31,444 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 09:33:31,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:33:31,445 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:33:31,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:31,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723599345] [2020-12-22 09:33:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:31,566 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 09:33:31,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723599345] [2020-12-22 09:33:31,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:31,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:31,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404184857] [2020-12-22 09:33:31,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:31,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:31,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:31,571 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand 5 states. [2020-12-22 09:33:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:31,706 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2020-12-22 09:33:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:33:31,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 09:33:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:31,717 INFO L225 Difference]: With dead ends: 1883 [2020-12-22 09:33:31,717 INFO L226 Difference]: Without dead ends: 1881 [2020-12-22 09:33:31,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:33:31,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-12-22 09:33:31,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2020-12-22 09:33:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2020-12-22 09:33:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2020-12-22 09:33:31,782 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2020-12-22 09:33:31,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:31,783 INFO L481 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2020-12-22 09:33:31,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2020-12-22 09:33:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:33:31,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:31,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:31,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:33:31,785 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:31,785 INFO L82 PathProgramCache]: Analyzing trace with hash -523945775, now seen corresponding path program 1 times [2020-12-22 09:33:31,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:31,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246750940] [2020-12-22 09:33:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:31,842 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 09:33:31,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246750940] [2020-12-22 09:33:31,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:31,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:33:31,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894297871] [2020-12-22 09:33:31,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:31,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:31,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:31,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:31,844 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand 3 states. [2020-12-22 09:33:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:38,162 INFO L93 Difference]: Finished difference Result 2912 states and 5225 transitions. [2020-12-22 09:33:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:38,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 09:33:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:38,179 INFO L225 Difference]: With dead ends: 2912 [2020-12-22 09:33:38,179 INFO L226 Difference]: Without dead ends: 2159 [2020-12-22 09:33:38,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 09:33:38,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2020-12-22 09:33:38,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2159. [2020-12-22 09:33:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:33:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3331 transitions. [2020-12-22 09:33:38,350 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3331 transitions. Word has length 63 [2020-12-22 09:33:38,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:38,351 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3331 transitions. [2020-12-22 09:33:38,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3331 transitions. [2020-12-22 09:33:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:33:38,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:38,354 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] [2020-12-22 09:33:38,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:33:38,354 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:38,355 INFO L82 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2020-12-22 09:33:38,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:38,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976084653] [2020-12-22 09:33:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:33:38,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976084653] [2020-12-22 09:33:38,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:38,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:38,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157913244] [2020-12-22 09:33:38,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:38,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:38,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:38,475 INFO L87 Difference]: Start difference. First operand 2159 states and 3331 transitions. Second operand 5 states. [2020-12-22 09:33:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:38,711 INFO L93 Difference]: Finished difference Result 4187 states and 6179 transitions. [2020-12-22 09:33:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:38,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:33:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:38,733 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:33:38,733 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:33:38,736 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 09:33:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:33:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:33:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:33:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4207 transitions. [2020-12-22 09:33:38,900 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4207 transitions. Word has length 64 [2020-12-22 09:33:38,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:38,901 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4207 transitions. [2020-12-22 09:33:38,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:38,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4207 transitions. [2020-12-22 09:33:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:33:38,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:38,903 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] [2020-12-22 09:33:38,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:33:38,904 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:38,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:38,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2020-12-22 09:33:38,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:38,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521145326] [2020-12-22 09:33:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:39,006 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 09:33:39,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521145326] [2020-12-22 09:33:39,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:39,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:39,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672634515] [2020-12-22 09:33:39,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:39,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:39,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:39,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:39,009 INFO L87 Difference]: Start difference. First operand 2787 states and 4207 transitions. Second operand 5 states. [2020-12-22 09:33:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:39,298 INFO L93 Difference]: Finished difference Result 4815 states and 7055 transitions. [2020-12-22 09:33:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:39,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:33:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:39,325 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:33:39,325 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:33:39,328 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 09:33:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:33:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:33:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:33:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5511 transitions. [2020-12-22 09:33:39,581 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5511 transitions. Word has length 64 [2020-12-22 09:33:39,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:39,581 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5511 transitions. [2020-12-22 09:33:39,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5511 transitions. [2020-12-22 09:33:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:33:39,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:39,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:39,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:33:39,584 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:39,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:39,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2020-12-22 09:33:39,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:39,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098284557] [2020-12-22 09:33:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:33:39,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098284557] [2020-12-22 09:33:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:39,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:39,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748766433] [2020-12-22 09:33:39,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:39,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:39,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:39,675 INFO L87 Difference]: Start difference. First operand 3731 states and 5511 transitions. Second operand 5 states. [2020-12-22 09:33:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:39,980 INFO L93 Difference]: Finished difference Result 5083 states and 7435 transitions. [2020-12-22 09:33:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:39,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:33:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:40,027 INFO L225 Difference]: With dead ends: 5083 [2020-12-22 09:33:40,028 INFO L226 Difference]: Without dead ends: 4633 [2020-12-22 09:33:40,031 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 09:33:40,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2020-12-22 09:33:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2020-12-22 09:33:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:33:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6143 transitions. [2020-12-22 09:33:40,275 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6143 transitions. Word has length 64 [2020-12-22 09:33:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:40,276 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6143 transitions. [2020-12-22 09:33:40,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6143 transitions. [2020-12-22 09:33:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:33:40,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:40,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:40,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:33:40,285 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:40,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:40,286 INFO L82 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2020-12-22 09:33:40,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:40,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602282898] [2020-12-22 09:33:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:40,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602282898] [2020-12-22 09:33:40,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:40,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:40,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151742023] [2020-12-22 09:33:40,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:40,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:40,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:40,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:40,355 INFO L87 Difference]: Start difference. First operand 4179 states and 6143 transitions. Second operand 3 states. [2020-12-22 09:33:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:40,633 INFO L93 Difference]: Finished difference Result 6831 states and 9845 transitions. [2020-12-22 09:33:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:40,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:33:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:40,645 INFO L225 Difference]: With dead ends: 6831 [2020-12-22 09:33:40,645 INFO L226 Difference]: Without dead ends: 4181 [2020-12-22 09:33:40,651 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 09:33:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2020-12-22 09:33:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2020-12-22 09:33:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:33:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6093 transitions. [2020-12-22 09:33:40,887 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6093 transitions. Word has length 65 [2020-12-22 09:33:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:40,887 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6093 transitions. [2020-12-22 09:33:40,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6093 transitions. [2020-12-22 09:33:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:33:40,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:40,890 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:40,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:33:40,890 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:40,891 INFO L82 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2020-12-22 09:33:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:40,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875103554] [2020-12-22 09:33:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:40,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875103554] [2020-12-22 09:33:40,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:40,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:40,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791286047] [2020-12-22 09:33:40,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:40,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:40,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:40,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:40,959 INFO L87 Difference]: Start difference. First operand 4179 states and 6093 transitions. Second operand 3 states. [2020-12-22 09:33:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:41,077 INFO L93 Difference]: Finished difference Result 5507 states and 7920 transitions. [2020-12-22 09:33:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:41,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:33:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:41,084 INFO L225 Difference]: With dead ends: 5507 [2020-12-22 09:33:41,085 INFO L226 Difference]: Without dead ends: 2857 [2020-12-22 09:33:41,091 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 09:33:41,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2020-12-22 09:33:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2020-12-22 09:33:41,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2855 states. [2020-12-22 09:33:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4243 transitions. [2020-12-22 09:33:41,218 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4243 transitions. Word has length 65 [2020-12-22 09:33:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:41,218 INFO L481 AbstractCegarLoop]: Abstraction has 2855 states and 4243 transitions. [2020-12-22 09:33:41,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4243 transitions. [2020-12-22 09:33:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:33:41,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:41,220 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:41,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:33:41,220 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:41,220 INFO L82 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2020-12-22 09:33:41,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:41,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780646042] [2020-12-22 09:33:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:33:41,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780646042] [2020-12-22 09:33:41,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273774144] [2020-12-22 09:33:41,371 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 09:33:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:33:41,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:33:41,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:41,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 10 [2020-12-22 09:33:41,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892201763] [2020-12-22 09:33:41,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:33:41,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:41,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:33:41,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:33:41,772 INFO L87 Difference]: Start difference. First operand 2855 states and 4243 transitions. Second operand 10 states. [2020-12-22 09:33:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:42,123 INFO L93 Difference]: Finished difference Result 4704 states and 6780 transitions. [2020-12-22 09:33:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:33:42,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-12-22 09:33:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:42,133 INFO L225 Difference]: With dead ends: 4704 [2020-12-22 09:33:42,133 INFO L226 Difference]: Without dead ends: 3694 [2020-12-22 09:33:42,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:33:42,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2020-12-22 09:33:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3661. [2020-12-22 09:33:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3661 states. [2020-12-22 09:33:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 5299 transitions. [2020-12-22 09:33:42,325 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 5299 transitions. Word has length 65 [2020-12-22 09:33:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:42,326 INFO L481 AbstractCegarLoop]: Abstraction has 3661 states and 5299 transitions. [2020-12-22 09:33:42,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:33:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 5299 transitions. [2020-12-22 09:33:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:33:42,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:42,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:42,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:33:42,543 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:42,544 INFO L82 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2020-12-22 09:33:42,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:42,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100051610] [2020-12-22 09:33:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:42,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100051610] [2020-12-22 09:33:42,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563127427] [2020-12-22 09:33:42,790 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 09:33:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:42,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:33:42,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:43,143 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:33:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:43,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:43,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:33:43,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784271379] [2020-12-22 09:33:43,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:33:43,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:43,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:33:43,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:33:43,447 INFO L87 Difference]: Start difference. First operand 3661 states and 5299 transitions. Second operand 17 states. [2020-12-22 09:33:44,114 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-12-22 09:33:45,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:45,558 INFO L93 Difference]: Finished difference Result 10680 states and 14569 transitions. [2020-12-22 09:33:45,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:33:45,559 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:33:45,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:45,579 INFO L225 Difference]: With dead ends: 10680 [2020-12-22 09:33:45,579 INFO L226 Difference]: Without dead ends: 9189 [2020-12-22 09:33:45,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:33:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2020-12-22 09:33:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 6136. [2020-12-22 09:33:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6136 states. [2020-12-22 09:33:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 8577 transitions. [2020-12-22 09:33:46,062 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 8577 transitions. Word has length 66 [2020-12-22 09:33:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:46,062 INFO L481 AbstractCegarLoop]: Abstraction has 6136 states and 8577 transitions. [2020-12-22 09:33:46,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:33:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 8577 transitions. [2020-12-22 09:33:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:33:46,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:46,064 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, 1, 1, 1] [2020-12-22 09:33:46,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:33:46,279 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:46,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2020-12-22 09:33:46,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:46,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275635965] [2020-12-22 09:33:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:46,490 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 09:33:46,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275635965] [2020-12-22 09:33:46,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017308236] [2020-12-22 09:33:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:33:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:46,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:33:46,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:46,758 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:33:47,159 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 09:33:47,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:47,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:33:47,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463830133] [2020-12-22 09:33:47,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:33:47,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:47,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:33:47,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:33:47,161 INFO L87 Difference]: Start difference. First operand 6136 states and 8577 transitions. Second operand 17 states. [2020-12-22 09:33:49,961 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:33:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:51,891 INFO L93 Difference]: Finished difference Result 29250 states and 39149 transitions. [2020-12-22 09:33:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:33:51,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:33:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:51,950 INFO L225 Difference]: With dead ends: 29250 [2020-12-22 09:33:51,950 INFO L226 Difference]: Without dead ends: 24643 [2020-12-22 09:33:51,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:33:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24643 states. [2020-12-22 09:33:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24643 to 11635. [2020-12-22 09:33:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11635 states. [2020-12-22 09:33:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 15704 transitions. [2020-12-22 09:33:53,106 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 15704 transitions. Word has length 66 [2020-12-22 09:33:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:53,106 INFO L481 AbstractCegarLoop]: Abstraction has 11635 states and 15704 transitions. [2020-12-22 09:33:53,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:33:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 15704 transitions. [2020-12-22 09:33:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:33:53,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:53,108 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, 1, 1, 1] [2020-12-22 09:33:53,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:33:53,322 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2020-12-22 09:33:53,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:53,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861600795] [2020-12-22 09:33:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:53,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861600795] [2020-12-22 09:33:53,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128184665] [2020-12-22 09:33:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:33:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:53,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:33:53,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:53,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:33:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:54,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:54,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-12-22 09:33:54,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8914093] [2020-12-22 09:33:54,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:33:54,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:54,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:33:54,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:33:54,176 INFO L87 Difference]: Start difference. First operand 11635 states and 15704 transitions. Second operand 18 states. [2020-12-22 09:33:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:58,733 INFO L93 Difference]: Finished difference Result 54429 states and 71040 transitions. [2020-12-22 09:33:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:33:58,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2020-12-22 09:33:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:58,818 INFO L225 Difference]: With dead ends: 54429 [2020-12-22 09:33:58,818 INFO L226 Difference]: Without dead ends: 44323 [2020-12-22 09:33:58,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:33:58,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44323 states. [2020-12-22 09:34:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44323 to 29071. [2020-12-22 09:34:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29071 states. [2020-12-22 09:34:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29071 states to 29071 states and 38132 transitions. [2020-12-22 09:34:01,345 INFO L78 Accepts]: Start accepts. Automaton has 29071 states and 38132 transitions. Word has length 66 [2020-12-22 09:34:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:01,346 INFO L481 AbstractCegarLoop]: Abstraction has 29071 states and 38132 transitions. [2020-12-22 09:34:01,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:34:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 29071 states and 38132 transitions. [2020-12-22 09:34:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:01,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:01,348 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 09:34:01,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:01,560 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2020-12-22 09:34:01,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:01,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886447690] [2020-12-22 09:34:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:01,605 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 09:34:01,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886447690] [2020-12-22 09:34:01,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:01,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:01,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146366844] [2020-12-22 09:34:01,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:01,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:01,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:01,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:01,611 INFO L87 Difference]: Start difference. First operand 29071 states and 38132 transitions. Second operand 3 states. [2020-12-22 09:34:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:03,278 INFO L93 Difference]: Finished difference Result 41067 states and 53662 transitions. [2020-12-22 09:34:03,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:03,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:34:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:03,306 INFO L225 Difference]: With dead ends: 41067 [2020-12-22 09:34:03,306 INFO L226 Difference]: Without dead ends: 13525 [2020-12-22 09:34:03,341 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 09:34:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13525 states. [2020-12-22 09:34:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13525 to 12473. [2020-12-22 09:34:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12473 states. [2020-12-22 09:34:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12473 states to 12473 states and 16421 transitions. [2020-12-22 09:34:04,518 INFO L78 Accepts]: Start accepts. Automaton has 12473 states and 16421 transitions. Word has length 66 [2020-12-22 09:34:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:04,519 INFO L481 AbstractCegarLoop]: Abstraction has 12473 states and 16421 transitions. [2020-12-22 09:34:04,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 12473 states and 16421 transitions. [2020-12-22 09:34:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:04,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:04,521 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, 1, 1, 1] [2020-12-22 09:34:04,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:34:04,522 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2020-12-22 09:34:04,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:04,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683287767] [2020-12-22 09:34:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:34:04,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683287767] [2020-12-22 09:34:04,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:04,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:04,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198569307] [2020-12-22 09:34:04,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:04,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:04,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:04,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:04,605 INFO L87 Difference]: Start difference. First operand 12473 states and 16421 transitions. Second operand 6 states. [2020-12-22 09:34:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:05,213 INFO L93 Difference]: Finished difference Result 18254 states and 23913 transitions. [2020-12-22 09:34:05,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:05,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:34:05,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:05,226 INFO L225 Difference]: With dead ends: 18254 [2020-12-22 09:34:05,226 INFO L226 Difference]: Without dead ends: 7387 [2020-12-22 09:34:05,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7387 states. [2020-12-22 09:34:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7387 to 7387. [2020-12-22 09:34:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7387 states. [2020-12-22 09:34:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7387 states to 7387 states and 9844 transitions. [2020-12-22 09:34:05,755 INFO L78 Accepts]: Start accepts. Automaton has 7387 states and 9844 transitions. Word has length 66 [2020-12-22 09:34:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:05,755 INFO L481 AbstractCegarLoop]: Abstraction has 7387 states and 9844 transitions. [2020-12-22 09:34:05,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 7387 states and 9844 transitions. [2020-12-22 09:34:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:05,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:05,758 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, 1, 1, 1] [2020-12-22 09:34:05,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:34:05,758 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:05,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2020-12-22 09:34:05,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:05,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573527627] [2020-12-22 09:34:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:34:05,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573527627] [2020-12-22 09:34:05,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:05,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:05,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342981431] [2020-12-22 09:34:05,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:05,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:05,822 INFO L87 Difference]: Start difference. First operand 7387 states and 9844 transitions. Second operand 6 states. [2020-12-22 09:34:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:06,505 INFO L93 Difference]: Finished difference Result 11746 states and 15380 transitions. [2020-12-22 09:34:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:06,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:34:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:06,515 INFO L225 Difference]: With dead ends: 11746 [2020-12-22 09:34:06,516 INFO L226 Difference]: Without dead ends: 5979 [2020-12-22 09:34:06,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2020-12-22 09:34:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 5979. [2020-12-22 09:34:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5979 states. [2020-12-22 09:34:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5979 states to 5979 states and 7970 transitions. [2020-12-22 09:34:07,064 INFO L78 Accepts]: Start accepts. Automaton has 5979 states and 7970 transitions. Word has length 66 [2020-12-22 09:34:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:07,064 INFO L481 AbstractCegarLoop]: Abstraction has 5979 states and 7970 transitions. [2020-12-22 09:34:07,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 5979 states and 7970 transitions. [2020-12-22 09:34:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:07,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:07,065 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, 1, 1, 1] [2020-12-22 09:34:07,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:34:07,066 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2020-12-22 09:34:07,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:07,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257550683] [2020-12-22 09:34:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:34:07,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257550683] [2020-12-22 09:34:07,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:07,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:07,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362528447] [2020-12-22 09:34:07,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:07,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:07,124 INFO L87 Difference]: Start difference. First operand 5979 states and 7970 transitions. Second operand 6 states. [2020-12-22 09:34:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:07,774 INFO L93 Difference]: Finished difference Result 12794 states and 16574 transitions. [2020-12-22 09:34:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:07,775 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:34:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:07,783 INFO L225 Difference]: With dead ends: 12794 [2020-12-22 09:34:07,783 INFO L226 Difference]: Without dead ends: 8376 [2020-12-22 09:34:07,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2020-12-22 09:34:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 7798. [2020-12-22 09:34:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7798 states. [2020-12-22 09:34:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7798 states to 7798 states and 10225 transitions. [2020-12-22 09:34:08,424 INFO L78 Accepts]: Start accepts. Automaton has 7798 states and 10225 transitions. Word has length 66 [2020-12-22 09:34:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:08,425 INFO L481 AbstractCegarLoop]: Abstraction has 7798 states and 10225 transitions. [2020-12-22 09:34:08,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 7798 states and 10225 transitions. [2020-12-22 09:34:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:08,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:08,426 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, 1, 1, 1, 1] [2020-12-22 09:34:08,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:34:08,426 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:08,427 INFO L82 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2020-12-22 09:34:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:08,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16112690] [2020-12-22 09:34:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:08,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16112690] [2020-12-22 09:34:08,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511230204] [2020-12-22 09:34:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:09,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 09:34:09,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:10,023 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2020-12-22 09:34:10,247 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-12-22 09:34:10,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:34:10,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:10,585 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:34:10,591 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:34:11,227 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 47 [2020-12-22 09:34:11,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:34:11,741 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 09:34:11,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:11,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22] total 33 [2020-12-22 09:34:11,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247001202] [2020-12-22 09:34:11,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 09:34:11,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:11,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 09:34:11,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:34:11,744 INFO L87 Difference]: Start difference. First operand 7798 states and 10225 transitions. Second operand 33 states. [2020-12-22 09:34:13,429 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-12-22 09:34:13,753 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:14,094 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 09:34:14,479 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-12-22 09:34:14,858 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:15,445 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-12-22 09:34:17,757 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:34:18,224 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:34:18,486 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-22 09:34:18,707 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:34:18,918 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:34:19,130 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-12-22 09:34:19,578 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:34:20,159 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-12-22 09:34:20,452 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-22 09:34:20,884 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-22 09:34:21,268 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:34:22,768 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 09:34:22,962 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-12-22 09:34:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:23,287 INFO L93 Difference]: Finished difference Result 13043 states and 16769 transitions. [2020-12-22 09:34:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:34:23,287 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-12-22 09:34:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:23,296 INFO L225 Difference]: With dead ends: 13043 [2020-12-22 09:34:23,297 INFO L226 Difference]: Without dead ends: 9291 [2020-12-22 09:34:23,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1695, Invalid=9225, Unknown=0, NotChecked=0, Total=10920 [2020-12-22 09:34:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9291 states. [2020-12-22 09:34:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9291 to 6973. [2020-12-22 09:34:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6973 states. [2020-12-22 09:34:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6973 states to 6973 states and 9230 transitions. [2020-12-22 09:34:23,884 INFO L78 Accepts]: Start accepts. Automaton has 6973 states and 9230 transitions. Word has length 67 [2020-12-22 09:34:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:23,884 INFO L481 AbstractCegarLoop]: Abstraction has 6973 states and 9230 transitions. [2020-12-22 09:34:23,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 09:34:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6973 states and 9230 transitions. [2020-12-22 09:34:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:23,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:23,886 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, 1, 1, 1, 1] [2020-12-22 09:34:24,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:34:24,101 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:24,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2020-12-22 09:34:24,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:24,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368292590] [2020-12-22 09:34:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:24,607 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 09:34:24,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368292590] [2020-12-22 09:34:24,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696268813] [2020-12-22 09:34:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:24,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:34:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:24,999 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:34:25,275 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2020-12-22 09:34:25,658 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 09:34:25,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:25,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-12-22 09:34:25,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287441111] [2020-12-22 09:34:25,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:34:25,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:25,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:34:25,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:34:25,660 INFO L87 Difference]: Start difference. First operand 6973 states and 9230 transitions. Second operand 22 states. [2020-12-22 09:34:25,960 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-12-22 09:34:26,132 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:34:26,322 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:34:26,482 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:34:27,297 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-12-22 09:34:27,559 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:34:27,739 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-12-22 09:34:28,003 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 09:34:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:28,969 INFO L93 Difference]: Finished difference Result 11980 states and 15648 transitions. [2020-12-22 09:34:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:34:28,970 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-22 09:34:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:28,980 INFO L225 Difference]: With dead ends: 11980 [2020-12-22 09:34:28,980 INFO L226 Difference]: Without dead ends: 9386 [2020-12-22 09:34:28,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:34:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9386 states. [2020-12-22 09:34:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9386 to 6548. [2020-12-22 09:34:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6548 states. [2020-12-22 09:34:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6548 states to 6548 states and 8731 transitions. [2020-12-22 09:34:29,537 INFO L78 Accepts]: Start accepts. Automaton has 6548 states and 8731 transitions. Word has length 67 [2020-12-22 09:34:29,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:29,538 INFO L481 AbstractCegarLoop]: Abstraction has 6548 states and 8731 transitions. [2020-12-22 09:34:29,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:34:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 6548 states and 8731 transitions. [2020-12-22 09:34:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:34:29,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:29,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:29,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:29,755 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:29,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2020-12-22 09:34:29,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:29,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128610273] [2020-12-22 09:34:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:30,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128610273] [2020-12-22 09:34:30,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439116870] [2020-12-22 09:34:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:30,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 09:34:30,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:31,648 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 09:34:32,057 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-12-22 09:34:32,064 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:32,563 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-12-22 09:34:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:32,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:32,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2020-12-22 09:34:32,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925142876] [2020-12-22 09:34:32,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 09:34:32,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 09:34:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2020-12-22 09:34:32,650 INFO L87 Difference]: Start difference. First operand 6548 states and 8731 transitions. Second operand 32 states. [2020-12-22 09:34:34,037 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 09:34:34,230 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 09:34:34,537 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:34:34,729 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 09:34:35,895 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-12-22 09:34:36,061 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 09:34:36,225 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 09:34:36,519 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 09:34:37,561 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 09:34:37,711 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 09:34:37,858 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 09:34:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:38,222 INFO L93 Difference]: Finished difference Result 9942 states and 13100 transitions. [2020-12-22 09:34:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 09:34:38,223 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-22 09:34:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:38,232 INFO L225 Difference]: With dead ends: 9942 [2020-12-22 09:34:38,233 INFO L226 Difference]: Without dead ends: 7063 [2020-12-22 09:34:38,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=804, Invalid=3102, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 09:34:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7063 states. [2020-12-22 09:34:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7063 to 4541. [2020-12-22 09:34:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4541 states. [2020-12-22 09:34:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 6261 transitions. [2020-12-22 09:34:38,602 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 6261 transitions. Word has length 68 [2020-12-22 09:34:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:38,603 INFO L481 AbstractCegarLoop]: Abstraction has 4541 states and 6261 transitions. [2020-12-22 09:34:38,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 09:34:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 6261 transitions. [2020-12-22 09:34:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 09:34:38,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:38,605 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:38,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:34:38,809 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1538014726, now seen corresponding path program 1 times [2020-12-22 09:34:38,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:38,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845235957] [2020-12-22 09:34:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:39,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845235957] [2020-12-22 09:34:39,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202991884] [2020-12-22 09:34:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:34:39,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:39,859 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:34:39,889 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:34:39,983 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:34:40,021 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:34:40,105 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:40,746 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 58 [2020-12-22 09:34:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 32 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:42,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:42,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:34:42,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434866936] [2020-12-22 09:34:42,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:34:42,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:42,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:34:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:34:42,086 INFO L87 Difference]: Start difference. First operand 4541 states and 6261 transitions. Second operand 22 states. [2020-12-22 09:34:42,835 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-22 09:34:43,145 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:44,663 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:46,153 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-22 09:34:46,417 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:34:46,650 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:46,843 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:47,045 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-22 09:34:47,378 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 09:34:47,659 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:47,874 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-22 09:34:48,155 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-12-22 09:34:48,488 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 105 [2020-12-22 09:34:48,771 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-12-22 09:34:48,997 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:34:49,276 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:49,490 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:49,730 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:49,927 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:50,229 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:50,469 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:50,665 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:51,281 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:51,658 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:34:51,948 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:52,188 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 09:34:52,462 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:52,903 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:53,266 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-12-22 09:34:53,476 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 09:34:57,537 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:57,788 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-12-22 09:34:58,496 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:58,805 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-12-22 09:34:59,138 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-12-22 09:34:59,814 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 106 [2020-12-22 09:35:01,964 WARN L197 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2020-12-22 09:35:02,318 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-12-22 09:35:02,838 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 116 [2020-12-22 09:35:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:03,326 INFO L93 Difference]: Finished difference Result 9357 states and 12435 transitions. [2020-12-22 09:35:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 09:35:03,328 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 110 [2020-12-22 09:35:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:03,334 INFO L225 Difference]: With dead ends: 9357 [2020-12-22 09:35:03,334 INFO L226 Difference]: Without dead ends: 6593 [2020-12-22 09:35:03,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1023, Invalid=3399, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 09:35:03,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2020-12-22 09:35:03,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 5047. [2020-12-22 09:35:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5047 states. [2020-12-22 09:35:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5047 states to 5047 states and 6784 transitions. [2020-12-22 09:35:04,004 INFO L78 Accepts]: Start accepts. Automaton has 5047 states and 6784 transitions. Word has length 110 [2020-12-22 09:35:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:04,004 INFO L481 AbstractCegarLoop]: Abstraction has 5047 states and 6784 transitions. [2020-12-22 09:35:04,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:35:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 5047 states and 6784 transitions. [2020-12-22 09:35:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:35:04,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:04,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:35:04,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 09:35:04,222 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:04,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1600436991, now seen corresponding path program 1 times [2020-12-22 09:35:04,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:04,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957175768] [2020-12-22 09:35:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 09:35:04,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957175768] [2020-12-22 09:35:04,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323945064] [2020-12-22 09:35:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:05,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 09:35:05,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:05,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:35:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 38 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:06,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:06,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 30 [2020-12-22 09:35:06,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720895662] [2020-12-22 09:35:06,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:35:06,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:06,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:35:06,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:35:06,494 INFO L87 Difference]: Start difference. First operand 5047 states and 6784 transitions. Second operand 30 states. [2020-12-22 09:35:06,736 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:35:07,583 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:35:07,821 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:35:08,342 WARN L197 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-22 09:35:08,600 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:35:08,855 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:35:09,168 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:35:09,462 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-22 09:35:09,813 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:35:10,243 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-12-22 09:35:10,684 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-12-22 09:35:11,049 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-12-22 09:35:11,526 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-12-22 09:35:11,913 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:35:12,271 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-12-22 09:35:12,691 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 09:35:13,019 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:13,560 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:35:13,940 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:35:14,342 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:35:14,781 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:15,260 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:35:15,642 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:35:16,052 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:35:16,442 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:35:16,771 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:35:17,073 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:35:17,328 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-22 09:35:18,639 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:18,989 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:19,512 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:35:19,953 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:35:20,266 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:35:20,866 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:21,317 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:21,584 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:35:22,294 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:22,734 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:25,042 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 09:35:26,040 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:35:26,737 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:35:27,126 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-22 09:35:27,664 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:28,237 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:28,818 INFO L93 Difference]: Finished difference Result 8629 states and 11304 transitions. [2020-12-22 09:35:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 09:35:28,819 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-12-22 09:35:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:28,830 INFO L225 Difference]: With dead ends: 8629 [2020-12-22 09:35:28,830 INFO L226 Difference]: Without dead ends: 6596 [2020-12-22 09:35:28,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=940, Invalid=5380, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 09:35:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6596 states. [2020-12-22 09:35:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6596 to 5020. [2020-12-22 09:35:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5020 states. [2020-12-22 09:35:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5020 states to 5020 states and 6724 transitions. [2020-12-22 09:35:30,099 INFO L78 Accepts]: Start accepts. Automaton has 5020 states and 6724 transitions. Word has length 111 [2020-12-22 09:35:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:30,100 INFO L481 AbstractCegarLoop]: Abstraction has 5020 states and 6724 transitions. [2020-12-22 09:35:30,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:35:30,100 INFO L276 IsEmpty]: Start isEmpty. Operand 5020 states and 6724 transitions. [2020-12-22 09:35:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:35:30,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:30,104 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:35:30,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:35:30,319 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1933874233, now seen corresponding path program 1 times [2020-12-22 09:35:30,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:30,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109836141] [2020-12-22 09:35:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 33 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:31,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109836141] [2020-12-22 09:35:31,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682909724] [2020-12-22 09:35:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:35:31,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:32,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:35:32,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:32,820 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:32,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:33,337 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:35:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 27 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:33,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:33,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 34 [2020-12-22 09:35:33,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474960592] [2020-12-22 09:35:33,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 09:35:33,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 09:35:33,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 09:35:33,996 INFO L87 Difference]: Start difference. First operand 5020 states and 6724 transitions. Second operand 34 states. [2020-12-22 09:35:34,729 WARN L197 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 98 [2020-12-22 09:35:35,031 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:35,337 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:35:35,641 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:35:35,934 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:35:36,416 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 09:35:36,865 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-12-22 09:35:37,643 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2020-12-22 09:35:38,222 WARN L197 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-12-22 09:35:38,864 WARN L197 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2020-12-22 09:35:39,389 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-12-22 09:35:40,071 WARN L197 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-12-22 09:35:40,668 WARN L197 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-12-22 09:35:41,234 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-12-22 09:35:41,767 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-12-22 09:35:42,389 WARN L197 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-12-22 09:35:42,966 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-22 09:35:43,537 WARN L197 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-12-22 09:35:44,147 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-12-22 09:35:44,773 WARN L197 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-12-22 09:35:45,260 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-12-22 09:35:45,740 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-12-22 09:35:46,274 WARN L197 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:35:46,801 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:35:47,260 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-12-22 09:35:48,043 WARN L197 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-12-22 09:35:48,548 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:35:49,029 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-12-22 09:35:49,644 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-12-22 09:35:50,291 WARN L197 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-12-22 09:35:50,779 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-22 09:35:51,611 WARN L197 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-12-22 09:35:52,245 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-12-22 09:35:52,905 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-12-22 09:35:53,354 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-12-22 09:35:53,847 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-12-22 09:35:54,314 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-22 09:35:54,821 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-22 09:35:55,295 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-12-22 09:35:55,753 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-12-22 09:35:56,242 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-12-22 09:35:56,712 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-12-22 09:35:57,208 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-12-22 09:35:57,839 WARN L197 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-12-22 09:35:58,259 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-12-22 09:35:58,986 WARN L197 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-12-22 09:35:59,496 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-12-22 09:36:00,065 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-12-22 09:36:00,923 WARN L197 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-12-22 09:36:01,622 WARN L197 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-12-22 09:36:02,051 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-12-22 09:36:03,031 WARN L197 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-12-22 09:36:03,458 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-12-22 09:36:04,237 WARN L197 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-12-22 09:36:04,683 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 09:36:04,991 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-12-22 09:36:05,614 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 09:36:05,842 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 09:36:06,443 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-12-22 09:36:06,777 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-12-22 09:36:07,050 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:36:07,999 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:36:08,241 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:36:08,960 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-22 09:36:09,254 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:36:09,632 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:36:09,882 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-22 09:36:10,144 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-22 09:36:10,600 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:36:11,277 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 09:36:11,496 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 09:36:11,889 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 09:36:12,256 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:36:12,488 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 09:36:12,872 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 09:36:13,323 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:36:13,681 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:36:13,941 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:36:14,632 WARN L197 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-22 09:36:15,179 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:36:16,166 WARN L197 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 09:36:16,626 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:36:17,645 WARN L197 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-22 09:36:18,081 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:36:19,746 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-22 09:36:20,386 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:36:22,297 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:36:22,611 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:36:22,803 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-22 09:36:23,080 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 09:36:23,587 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:36:24,034 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 09:36:24,469 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:36:25,011 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:36:25,629 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:36:26,125 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:36:26,379 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:36:27,201 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:36:27,963 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-22 09:36:28,317 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 09:36:29,015 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 09:36:29,863 WARN L197 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-12-22 09:36:30,215 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 09:36:30,514 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:36:31,205 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 09:36:31,582 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 09:36:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:32,406 INFO L93 Difference]: Finished difference Result 13007 states and 16705 transitions. [2020-12-22 09:36:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:36:32,406 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 112 [2020-12-22 09:36:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:32,414 INFO L225 Difference]: With dead ends: 13007 [2020-12-22 09:36:32,414 INFO L226 Difference]: Without dead ends: 9765 [2020-12-22 09:36:32,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=3020, Invalid=18442, Unknown=0, NotChecked=0, Total=21462 [2020-12-22 09:36:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9765 states. [2020-12-22 09:36:33,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9765 to 5439. [2020-12-22 09:36:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5439 states. [2020-12-22 09:36:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 7238 transitions. [2020-12-22 09:36:33,390 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 7238 transitions. Word has length 112 [2020-12-22 09:36:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:33,391 INFO L481 AbstractCegarLoop]: Abstraction has 5439 states and 7238 transitions. [2020-12-22 09:36:33,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 09:36:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 7238 transitions. [2020-12-22 09:36:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 09:36:33,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:33,394 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:36:33,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:36:33,608 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1117709487, now seen corresponding path program 1 times [2020-12-22 09:36:33,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:33,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359829432] [2020-12-22 09:36:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 26 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:34,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359829432] [2020-12-22 09:36:34,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486074857] [2020-12-22 09:36:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:36:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 09:36:34,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:36,695 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-12-22 09:36:36,955 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-22 09:36:37,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:36:37,919 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2020-12-22 09:36:38,750 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:36:38,838 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:39,114 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:39,584 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:40,335 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:41,006 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:42,252 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:42,988 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:43,371 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:43,523 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:43,800 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:44,452 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:45,439 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:46,430 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:47,081 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:47,615 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:48,025 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:48,663 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:37:02,878 WARN L197 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 395 DAG size of output: 228