/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.ufo.BOUNDED-6.pals+Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:34:17,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:34:17,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:34:17,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:34:17,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:34:17,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:34:17,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:34:17,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:34:17,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:34:17,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:34:17,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:34:17,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:34:17,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:34:17,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:34:17,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:34:17,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:34:17,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:34:17,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:34:17,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:34:17,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:34:17,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:34:17,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:34:17,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:34:17,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:34:18,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:34:18,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:34:18,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:34:18,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:34:18,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:34:18,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:34:18,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:34:18,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:34:18,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:34:18,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:34:18,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:34:18,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:34:18,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:34:18,055 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:34:18,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:34:18,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:34:18,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:34:18,058 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:34:18,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:34:18,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:34:18,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:34:18,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:34:18,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:34:18,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:34:18,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:34:18,060 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:34:18,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:34:18,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:34:18,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:34:18,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:34:18,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:34:18,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:34:18,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:34:18,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:34:18,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:34:18,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:34:18,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:34:18,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:34:18,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:34:18,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:34:18,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:34:18,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:34:18,550 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:34:18,551 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:34:18,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c [2020-12-22 09:34:18,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/292226695/c03bfcd2958e4d22a4aaa5faff1bee2b/FLAGabd2bc5b6 [2020-12-22 09:34:19,854 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:34:19,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c [2020-12-22 09:34:19,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/292226695/c03bfcd2958e4d22a4aaa5faff1bee2b/FLAGabd2bc5b6 [2020-12-22 09:34:20,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/292226695/c03bfcd2958e4d22a4aaa5faff1bee2b [2020-12-22 09:34:20,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:34:20,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:34:20,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:34:20,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:34:20,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:34:20,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:34:20" (1/1) ... [2020-12-22 09:34:20,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5314f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:20, skipping insertion in model container [2020-12-22 09:34:20,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:34:20" (1/1) ... [2020-12-22 09:34:20,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:34:20,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:34:20,765 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.ufo.BOUNDED-6.pals+Problem12_label00.c[6412,6425] [2020-12-22 09:34:20,793 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.ufo.BOUNDED-6.pals+Problem12_label00.c[8044,8057] [2020-12-22 09:34:21,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:34:21,825 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:34:21,948 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.ufo.BOUNDED-6.pals+Problem12_label00.c[6412,6425] [2020-12-22 09:34:21,959 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.ufo.BOUNDED-6.pals+Problem12_label00.c[8044,8057] [2020-12-22 09:34:22,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:34:22,653 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:34:22,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22 WrapperNode [2020-12-22 09:34:22,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:34:22,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:34:22,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:34:22,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:34:22,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (1/1) ... [2020-12-22 09:34:22,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (1/1) ... [2020-12-22 09:34:23,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:34:23,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:34:23,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:34:23,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:34:23,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (1/1) ... [2020-12-22 09:34:23,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (1/1) ... [2020-12-22 09:34:23,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (1/1) ... [2020-12-22 09:34:23,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (1/1) ... [2020-12-22 09:34:23,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (1/1) ... [2020-12-22 09:34:23,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (1/1) ... [2020-12-22 09:34:23,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (1/1) ... [2020-12-22 09:34:23,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:34:23,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:34:23,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:34:23,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:34:23,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (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 09:34:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:34:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:34:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:34:23,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:34:29,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:34:29,260 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 09:34:29,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:34:29 BoogieIcfgContainer [2020-12-22 09:34:29,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:34:29,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:34:29,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:34:29,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:34:29,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:34:20" (1/3) ... [2020-12-22 09:34:29,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1543bdc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:34:29, skipping insertion in model container [2020-12-22 09:34:29,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:22" (2/3) ... [2020-12-22 09:34:29,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1543bdc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:34:29, skipping insertion in model container [2020-12-22 09:34:29,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:34:29" (3/3) ... [2020-12-22 09:34:29,273 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label00.c [2020-12-22 09:34:29,280 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:34:29,286 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:34:29,305 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:34:29,340 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:34:29,341 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:34:29,341 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:34:29,341 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:34:29,341 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:34:29,341 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:34:29,341 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:34:29,342 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:34:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states. [2020-12-22 09:34:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 09:34:29,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:29,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:29,385 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:29,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:29,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1520027445, now seen corresponding path program 1 times [2020-12-22 09:34:29,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:29,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91014880] [2020-12-22 09:34:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:29,671 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 09:34:29,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91014880] [2020-12-22 09:34:29,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:29,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:34:29,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511780809] [2020-12-22 09:34:29,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:29,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:29,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:29,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:29,701 INFO L87 Difference]: Start difference. First operand 878 states. Second operand 3 states. [2020-12-22 09:34:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:36,185 INFO L93 Difference]: Finished difference Result 2489 states and 4794 transitions. [2020-12-22 09:34:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:36,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 09:34:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:36,238 INFO L225 Difference]: With dead ends: 2489 [2020-12-22 09:34:36,238 INFO L226 Difference]: Without dead ends: 1563 [2020-12-22 09:34:36,249 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 09:34:36,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2020-12-22 09:34:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2020-12-22 09:34:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1563 states. [2020-12-22 09:34:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2872 transitions. [2020-12-22 09:34:36,456 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2872 transitions. Word has length 16 [2020-12-22 09:34:36,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:36,456 INFO L481 AbstractCegarLoop]: Abstraction has 1563 states and 2872 transitions. [2020-12-22 09:34:36,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2872 transitions. [2020-12-22 09:34:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:34:36,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:36,460 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 09:34:36,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:34:36,461 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:36,463 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:34:36,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:36,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591633891] [2020-12-22 09:34:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:36,619 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 09:34:36,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591633891] [2020-12-22 09:34:36,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:36,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:36,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627315822] [2020-12-22 09:34:36,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:36,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:36,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:36,624 INFO L87 Difference]: Start difference. First operand 1563 states and 2872 transitions. Second operand 5 states. [2020-12-22 09:34:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:36,758 INFO L93 Difference]: Finished difference Result 1639 states and 2988 transitions. [2020-12-22 09:34:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:36,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:34:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:36,775 INFO L225 Difference]: With dead ends: 1639 [2020-12-22 09:34:36,776 INFO L226 Difference]: Without dead ends: 1599 [2020-12-22 09:34:36,778 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 09:34:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2020-12-22 09:34:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1563. [2020-12-22 09:34:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1563 states. [2020-12-22 09:34:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2856 transitions. [2020-12-22 09:34:36,843 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2856 transitions. Word has length 26 [2020-12-22 09:34:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:36,843 INFO L481 AbstractCegarLoop]: Abstraction has 1563 states and 2856 transitions. [2020-12-22 09:34:36,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2856 transitions. [2020-12-22 09:34:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:34:36,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:36,848 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 09:34:36,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:34:36,850 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:36,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:34:36,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:36,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789796834] [2020-12-22 09:34:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:36,987 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 09:34:36,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789796834] [2020-12-22 09:34:36,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:36,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:36,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466957007] [2020-12-22 09:34:36,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:36,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:36,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:36,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:36,991 INFO L87 Difference]: Start difference. First operand 1563 states and 2856 transitions. Second operand 3 states. [2020-12-22 09:34:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:37,040 INFO L93 Difference]: Finished difference Result 1629 states and 2958 transitions. [2020-12-22 09:34:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:37,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:34:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:37,055 INFO L225 Difference]: With dead ends: 1629 [2020-12-22 09:34:37,056 INFO L226 Difference]: Without dead ends: 1593 [2020-12-22 09:34:37,059 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 09:34:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2020-12-22 09:34:37,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1591. [2020-12-22 09:34:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1591 states. [2020-12-22 09:34:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2900 transitions. [2020-12-22 09:34:37,136 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2900 transitions. Word has length 41 [2020-12-22 09:34:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:37,137 INFO L481 AbstractCegarLoop]: Abstraction has 1591 states and 2900 transitions. [2020-12-22 09:34:37,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2900 transitions. [2020-12-22 09:34:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:34:37,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:37,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:37,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:34:37,145 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:37,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:34:37,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:37,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16569385] [2020-12-22 09:34:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:37,335 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 09:34:37,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16569385] [2020-12-22 09:34:37,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:37,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:37,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380409442] [2020-12-22 09:34:37,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:37,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:37,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:37,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:37,341 INFO L87 Difference]: Start difference. First operand 1591 states and 2900 transitions. Second operand 5 states. [2020-12-22 09:34:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:37,525 INFO L93 Difference]: Finished difference Result 1975 states and 3500 transitions. [2020-12-22 09:34:37,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:34:37,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:34:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:37,539 INFO L225 Difference]: With dead ends: 1975 [2020-12-22 09:34:37,540 INFO L226 Difference]: Without dead ends: 1911 [2020-12-22 09:34:37,541 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 09:34:37,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2020-12-22 09:34:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1653. [2020-12-22 09:34:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1653 states. [2020-12-22 09:34:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2995 transitions. [2020-12-22 09:34:37,604 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2995 transitions. Word has length 41 [2020-12-22 09:34:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:37,605 INFO L481 AbstractCegarLoop]: Abstraction has 1653 states and 2995 transitions. [2020-12-22 09:34:37,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2995 transitions. [2020-12-22 09:34:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:37,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:37,610 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 09:34:37,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:34:37,611 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:37,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:34:37,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:37,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75304147] [2020-12-22 09:34:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:37,737 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 09:34:37,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75304147] [2020-12-22 09:34:37,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:37,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:37,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370275947] [2020-12-22 09:34:37,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:37,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:37,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:37,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:37,742 INFO L87 Difference]: Start difference. First operand 1653 states and 2995 transitions. Second operand 3 states. [2020-12-22 09:34:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:37,812 INFO L93 Difference]: Finished difference Result 1840 states and 3282 transitions. [2020-12-22 09:34:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:37,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:34:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:37,826 INFO L225 Difference]: With dead ends: 1840 [2020-12-22 09:34:37,826 INFO L226 Difference]: Without dead ends: 1714 [2020-12-22 09:34:37,828 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 09:34:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-12-22 09:34:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2020-12-22 09:34:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2020-12-22 09:34:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 3083 transitions. [2020-12-22 09:34:37,938 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 3083 transitions. Word has length 43 [2020-12-22 09:34:37,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:37,940 INFO L481 AbstractCegarLoop]: Abstraction has 1712 states and 3083 transitions. [2020-12-22 09:34:37,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:37,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 3083 transitions. [2020-12-22 09:34:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:37,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:37,943 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 09:34:37,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:34:37,943 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:37,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:34:37,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:37,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416229570] [2020-12-22 09:34:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:38,112 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 09:34:38,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416229570] [2020-12-22 09:34:38,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:38,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:38,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104947986] [2020-12-22 09:34:38,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:38,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:38,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:38,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:38,115 INFO L87 Difference]: Start difference. First operand 1712 states and 3083 transitions. Second operand 5 states. [2020-12-22 09:34:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:38,247 INFO L93 Difference]: Finished difference Result 1897 states and 3365 transitions. [2020-12-22 09:34:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:38,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:34:38,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:38,265 INFO L225 Difference]: With dead ends: 1897 [2020-12-22 09:34:38,265 INFO L226 Difference]: Without dead ends: 1714 [2020-12-22 09:34:38,267 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 09:34:38,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-12-22 09:34:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2020-12-22 09:34:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2020-12-22 09:34:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 3080 transitions. [2020-12-22 09:34:38,329 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 3080 transitions. Word has length 43 [2020-12-22 09:34:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:38,329 INFO L481 AbstractCegarLoop]: Abstraction has 1712 states and 3080 transitions. [2020-12-22 09:34:38,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 3080 transitions. [2020-12-22 09:34:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:38,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:38,331 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 09:34:38,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:34:38,337 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:38,337 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:34:38,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:38,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545560091] [2020-12-22 09:34:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:38,406 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 09:34:38,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545560091] [2020-12-22 09:34:38,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:38,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:38,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676515367] [2020-12-22 09:34:38,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:38,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:38,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:38,410 INFO L87 Difference]: Start difference. First operand 1712 states and 3080 transitions. Second operand 3 states. [2020-12-22 09:34:38,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:38,470 INFO L93 Difference]: Finished difference Result 2042 states and 3576 transitions. [2020-12-22 09:34:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:38,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:34:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:38,483 INFO L225 Difference]: With dead ends: 2042 [2020-12-22 09:34:38,484 INFO L226 Difference]: Without dead ends: 1859 [2020-12-22 09:34:38,485 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 09:34:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2020-12-22 09:34:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1857. [2020-12-22 09:34:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1857 states. [2020-12-22 09:34:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 3291 transitions. [2020-12-22 09:34:38,556 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 3291 transitions. Word has length 43 [2020-12-22 09:34:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:38,556 INFO L481 AbstractCegarLoop]: Abstraction has 1857 states and 3291 transitions. [2020-12-22 09:34:38,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 3291 transitions. [2020-12-22 09:34:38,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:34:38,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:38,559 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 09:34:38,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:34:38,560 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:38,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:34:38,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:38,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307252501] [2020-12-22 09:34:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:38,628 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 09:34:38,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307252501] [2020-12-22 09:34:38,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:38,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:38,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055837291] [2020-12-22 09:34:38,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:38,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:38,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:38,634 INFO L87 Difference]: Start difference. First operand 1857 states and 3291 transitions. Second operand 3 states. [2020-12-22 09:34:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:38,711 INFO L93 Difference]: Finished difference Result 2441 states and 4149 transitions. [2020-12-22 09:34:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:38,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:34:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:38,727 INFO L225 Difference]: With dead ends: 2441 [2020-12-22 09:34:38,728 INFO L226 Difference]: Without dead ends: 2113 [2020-12-22 09:34:38,730 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 09:34:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2020-12-22 09:34:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2111. [2020-12-22 09:34:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2111 states. [2020-12-22 09:34:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3647 transitions. [2020-12-22 09:34:38,835 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3647 transitions. Word has length 43 [2020-12-22 09:34:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:38,836 INFO L481 AbstractCegarLoop]: Abstraction has 2111 states and 3647 transitions. [2020-12-22 09:34:38,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3647 transitions. [2020-12-22 09:34:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:34:38,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:38,837 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 09:34:38,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:34:38,837 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:38,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:34:38,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:38,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110972691] [2020-12-22 09:34:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:38,983 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 09:34:38,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110972691] [2020-12-22 09:34:38,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:38,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:38,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536275878] [2020-12-22 09:34:38,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:38,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:38,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:38,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:38,990 INFO L87 Difference]: Start difference. First operand 2111 states and 3647 transitions. Second operand 5 states. [2020-12-22 09:34:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:39,171 INFO L93 Difference]: Finished difference Result 2634 states and 4375 transitions. [2020-12-22 09:34:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:34:39,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 09:34:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:39,189 INFO L225 Difference]: With dead ends: 2634 [2020-12-22 09:34:39,189 INFO L226 Difference]: Without dead ends: 2632 [2020-12-22 09:34:39,191 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 09:34:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2020-12-22 09:34:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2159. [2020-12-22 09:34:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:34:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3691 transitions. [2020-12-22 09:34:39,328 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3691 transitions. Word has length 44 [2020-12-22 09:34:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:39,334 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3691 transitions. [2020-12-22 09:34:39,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3691 transitions. [2020-12-22 09:34:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:34:39,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:39,336 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 09:34:39,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:34:39,337 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:39,337 INFO L82 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2020-12-22 09:34:39,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:39,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951050729] [2020-12-22 09:34:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:39,472 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 09:34:39,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951050729] [2020-12-22 09:34:39,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:39,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:39,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740683358] [2020-12-22 09:34:39,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:39,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:39,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:39,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:39,476 INFO L87 Difference]: Start difference. First operand 2159 states and 3691 transitions. Second operand 5 states. [2020-12-22 09:34:39,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:39,737 INFO L93 Difference]: Finished difference Result 4187 states and 6539 transitions. [2020-12-22 09:34:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:39,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:34:39,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:39,760 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:34:39,761 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:34:39,764 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 09:34:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:34:39,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:34:39,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:34:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4567 transitions. [2020-12-22 09:34:39,929 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4567 transitions. Word has length 64 [2020-12-22 09:34:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:39,929 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4567 transitions. [2020-12-22 09:34:39,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4567 transitions. [2020-12-22 09:34:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:34:39,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:39,931 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 09:34:39,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:34:39,931 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:39,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2020-12-22 09:34:39,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:39,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245103398] [2020-12-22 09:34:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:40,011 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 09:34:40,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245103398] [2020-12-22 09:34:40,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:40,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486291156] [2020-12-22 09:34:40,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:40,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:40,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:40,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:40,014 INFO L87 Difference]: Start difference. First operand 2787 states and 4567 transitions. Second operand 5 states. [2020-12-22 09:34:40,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:40,302 INFO L93 Difference]: Finished difference Result 4815 states and 7415 transitions. [2020-12-22 09:34:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:40,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:34:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:40,350 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:34:40,350 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:34:40,354 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 09:34:40,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:34:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:34:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:34:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5871 transitions. [2020-12-22 09:34:40,583 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5871 transitions. Word has length 64 [2020-12-22 09:34:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:40,583 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5871 transitions. [2020-12-22 09:34:40,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5871 transitions. [2020-12-22 09:34:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:34:40,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:40,585 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 09:34:40,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:34:40,587 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2020-12-22 09:34:40,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:40,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871022041] [2020-12-22 09:34:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:40,669 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 09:34:40,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871022041] [2020-12-22 09:34:40,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:40,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:40,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37118394] [2020-12-22 09:34:40,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:40,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:40,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:40,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:40,672 INFO L87 Difference]: Start difference. First operand 3731 states and 5871 transitions. Second operand 5 states. [2020-12-22 09:34:41,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:41,055 INFO L93 Difference]: Finished difference Result 5083 states and 7795 transitions. [2020-12-22 09:34:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:41,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:34:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:41,071 INFO L225 Difference]: With dead ends: 5083 [2020-12-22 09:34:41,071 INFO L226 Difference]: Without dead ends: 4633 [2020-12-22 09:34:41,073 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 09:34:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2020-12-22 09:34:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2020-12-22 09:34:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:34:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6503 transitions. [2020-12-22 09:34:41,351 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6503 transitions. Word has length 64 [2020-12-22 09:34:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:41,351 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6503 transitions. [2020-12-22 09:34:41,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6503 transitions. [2020-12-22 09:34:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:41,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:41,353 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 09:34:41,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:34:41,354 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2020-12-22 09:34:41,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:41,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590261408] [2020-12-22 09:34:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:41,421 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 09:34:41,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590261408] [2020-12-22 09:34:41,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:41,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:41,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101435470] [2020-12-22 09:34:41,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:41,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:41,431 INFO L87 Difference]: Start difference. First operand 4179 states and 6503 transitions. Second operand 3 states. [2020-12-22 09:34:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:41,664 INFO L93 Difference]: Finished difference Result 6831 states and 10205 transitions. [2020-12-22 09:34:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:41,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:34:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:41,676 INFO L225 Difference]: With dead ends: 6831 [2020-12-22 09:34:41,676 INFO L226 Difference]: Without dead ends: 4181 [2020-12-22 09:34:41,681 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 09:34:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2020-12-22 09:34:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2020-12-22 09:34:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:34:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6453 transitions. [2020-12-22 09:34:41,921 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6453 transitions. Word has length 65 [2020-12-22 09:34:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:41,922 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6453 transitions. [2020-12-22 09:34:41,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6453 transitions. [2020-12-22 09:34:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:41,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:41,930 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 09:34:41,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:34:41,931 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:41,931 INFO L82 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2020-12-22 09:34:41,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:41,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671606211] [2020-12-22 09:34:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:41,982 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 09:34:41,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671606211] [2020-12-22 09:34:41,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:41,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:41,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363565775] [2020-12-22 09:34:41,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:41,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:41,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:41,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:41,984 INFO L87 Difference]: Start difference. First operand 4179 states and 6453 transitions. Second operand 3 states. [2020-12-22 09:34:42,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:42,119 INFO L93 Difference]: Finished difference Result 5507 states and 8280 transitions. [2020-12-22 09:34:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:42,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:34:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:42,128 INFO L225 Difference]: With dead ends: 5507 [2020-12-22 09:34:42,128 INFO L226 Difference]: Without dead ends: 2857 [2020-12-22 09:34:42,135 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 09:34:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2020-12-22 09:34:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2020-12-22 09:34:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2855 states. [2020-12-22 09:34:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4603 transitions. [2020-12-22 09:34:42,276 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4603 transitions. Word has length 65 [2020-12-22 09:34:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:42,276 INFO L481 AbstractCegarLoop]: Abstraction has 2855 states and 4603 transitions. [2020-12-22 09:34:42,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4603 transitions. [2020-12-22 09:34:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:42,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:42,278 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 09:34:42,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:34:42,279 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2020-12-22 09:34:42,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:42,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643277344] [2020-12-22 09:34:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:42,438 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 09:34:42,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643277344] [2020-12-22 09:34:42,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097244820] [2020-12-22 09:34:42,439 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 09:34:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:42,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:34:42,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:42,782 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 09:34:42,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:42,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 10 [2020-12-22 09:34:42,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784297210] [2020-12-22 09:34:42,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:34:42,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:42,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:34:42,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:34:42,785 INFO L87 Difference]: Start difference. First operand 2855 states and 4603 transitions. Second operand 10 states. [2020-12-22 09:34:43,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:43,187 INFO L93 Difference]: Finished difference Result 4704 states and 7140 transitions. [2020-12-22 09:34:43,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:34:43,188 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-12-22 09:34:43,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:43,197 INFO L225 Difference]: With dead ends: 4704 [2020-12-22 09:34:43,198 INFO L226 Difference]: Without dead ends: 3694 [2020-12-22 09:34:43,204 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 09:34:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2020-12-22 09:34:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3661. [2020-12-22 09:34:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3661 states. [2020-12-22 09:34:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 5659 transitions. [2020-12-22 09:34:43,550 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 5659 transitions. Word has length 65 [2020-12-22 09:34:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:43,550 INFO L481 AbstractCegarLoop]: Abstraction has 3661 states and 5659 transitions. [2020-12-22 09:34:43,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:34:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 5659 transitions. [2020-12-22 09:34:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:43,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:43,552 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 09:34:43,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:34:43,765 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2020-12-22 09:34:43,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:43,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294204135] [2020-12-22 09:34:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:44,066 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 09:34:44,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294204135] [2020-12-22 09:34:44,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470278544] [2020-12-22 09:34:44,067 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 09:34:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:44,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:34:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:44,433 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:34:44,725 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 09:34:44,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:44,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:34:44,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955901549] [2020-12-22 09:34:44,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:34:44,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:34:44,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:34:44,728 INFO L87 Difference]: Start difference. First operand 3661 states and 5659 transitions. Second operand 17 states. [2020-12-22 09:34:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:46,877 INFO L93 Difference]: Finished difference Result 10680 states and 14929 transitions. [2020-12-22 09:34:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:34:46,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:34:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:46,901 INFO L225 Difference]: With dead ends: 10680 [2020-12-22 09:34:46,901 INFO L226 Difference]: Without dead ends: 9189 [2020-12-22 09:34:46,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:34:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2020-12-22 09:34:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 6136. [2020-12-22 09:34:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6136 states. [2020-12-22 09:34:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 8937 transitions. [2020-12-22 09:34:47,595 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 8937 transitions. Word has length 66 [2020-12-22 09:34:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:47,595 INFO L481 AbstractCegarLoop]: Abstraction has 6136 states and 8937 transitions. [2020-12-22 09:34:47,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:34:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 8937 transitions. [2020-12-22 09:34:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:47,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:47,598 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 09:34:47,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:34:47,812 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:47,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2020-12-22 09:34:47,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:47,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551466419] [2020-12-22 09:34:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:48,081 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 09:34:48,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551466419] [2020-12-22 09:34:48,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156521654] [2020-12-22 09:34:48,082 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 09:34:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:48,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:34:48,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:48,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:34:48,666 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 09:34:48,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:48,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:34:48,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79080334] [2020-12-22 09:34:48,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:34:48,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:48,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:34:48,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:34:48,669 INFO L87 Difference]: Start difference. First operand 6136 states and 8937 transitions. Second operand 17 states. [2020-12-22 09:34:51,416 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:34:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:53,319 INFO L93 Difference]: Finished difference Result 29250 states and 39509 transitions. [2020-12-22 09:34:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:34:53,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:34:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:53,378 INFO L225 Difference]: With dead ends: 29250 [2020-12-22 09:34:53,379 INFO L226 Difference]: Without dead ends: 24643 [2020-12-22 09:34:53,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:34:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24643 states. [2020-12-22 09:34:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24643 to 11635. [2020-12-22 09:34:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11635 states. [2020-12-22 09:34:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 16064 transitions. [2020-12-22 09:34:54,410 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 16064 transitions. Word has length 66 [2020-12-22 09:34:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:54,410 INFO L481 AbstractCegarLoop]: Abstraction has 11635 states and 16064 transitions. [2020-12-22 09:34:54,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:34:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 16064 transitions. [2020-12-22 09:34:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:54,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:54,413 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 09:34:54,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:34:54,629 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:54,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:54,631 INFO L82 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2020-12-22 09:34:54,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:54,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515060952] [2020-12-22 09:34:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:54,867 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 09:34:54,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515060952] [2020-12-22 09:34:54,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665614584] [2020-12-22 09:34:54,868 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 09:34:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:55,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:34:55,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:55,311 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:34:55,641 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 09:34:55,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:55,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:34:55,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220930676] [2020-12-22 09:34:55,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:34:55,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:55,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:34:55,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:34:55,644 INFO L87 Difference]: Start difference. First operand 11635 states and 16064 transitions. Second operand 17 states. [2020-12-22 09:35:00,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:00,472 INFO L93 Difference]: Finished difference Result 54429 states and 71400 transitions. [2020-12-22 09:35:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:35:00,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:35:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:00,584 INFO L225 Difference]: With dead ends: 54429 [2020-12-22 09:35:00,584 INFO L226 Difference]: Without dead ends: 44323 [2020-12-22 09:35:00,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:35:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44323 states. [2020-12-22 09:35:03,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44323 to 29071. [2020-12-22 09:35:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29071 states. [2020-12-22 09:35:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29071 states to 29071 states and 38492 transitions. [2020-12-22 09:35:03,215 INFO L78 Accepts]: Start accepts. Automaton has 29071 states and 38492 transitions. Word has length 66 [2020-12-22 09:35:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:03,215 INFO L481 AbstractCegarLoop]: Abstraction has 29071 states and 38492 transitions. [2020-12-22 09:35:03,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:35:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 29071 states and 38492 transitions. [2020-12-22 09:35:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:03,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:03,218 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 09:35:03,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:35:03,435 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:03,436 INFO L82 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2020-12-22 09:35:03,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:03,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588321223] [2020-12-22 09:35:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:03,501 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 09:35:03,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588321223] [2020-12-22 09:35:03,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:03,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:35:03,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080968355] [2020-12-22 09:35:03,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:35:03,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:03,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:35:03,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:35:03,506 INFO L87 Difference]: Start difference. First operand 29071 states and 38492 transitions. Second operand 3 states. [2020-12-22 09:35:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:05,519 INFO L93 Difference]: Finished difference Result 41067 states and 54022 transitions. [2020-12-22 09:35:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:35:05,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:35:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:05,547 INFO L225 Difference]: With dead ends: 41067 [2020-12-22 09:35:05,547 INFO L226 Difference]: Without dead ends: 13525 [2020-12-22 09:35:05,582 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 09:35:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13525 states. [2020-12-22 09:35:06,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13525 to 12473. [2020-12-22 09:35:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12473 states. [2020-12-22 09:35:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12473 states to 12473 states and 16781 transitions. [2020-12-22 09:35:06,629 INFO L78 Accepts]: Start accepts. Automaton has 12473 states and 16781 transitions. Word has length 66 [2020-12-22 09:35:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:06,630 INFO L481 AbstractCegarLoop]: Abstraction has 12473 states and 16781 transitions. [2020-12-22 09:35:06,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:35:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 12473 states and 16781 transitions. [2020-12-22 09:35:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:06,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:06,631 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 09:35:06,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:35:06,632 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:06,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2020-12-22 09:35:06,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:06,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142618642] [2020-12-22 09:35:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:06,704 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 09:35:06,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142618642] [2020-12-22 09:35:06,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:06,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:35:06,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902382598] [2020-12-22 09:35:06,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:35:06,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:06,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:35:06,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:06,707 INFO L87 Difference]: Start difference. First operand 12473 states and 16781 transitions. Second operand 6 states. [2020-12-22 09:35:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:07,738 INFO L93 Difference]: Finished difference Result 21538 states and 28428 transitions. [2020-12-22 09:35:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:35:07,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:35:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:07,756 INFO L225 Difference]: With dead ends: 21538 [2020-12-22 09:35:07,757 INFO L226 Difference]: Without dead ends: 10671 [2020-12-22 09:35:07,768 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 09:35:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10671 states. [2020-12-22 09:35:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10671 to 10671. [2020-12-22 09:35:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10671 states. [2020-12-22 09:35:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10671 states to 10671 states and 14259 transitions. [2020-12-22 09:35:08,852 INFO L78 Accepts]: Start accepts. Automaton has 10671 states and 14259 transitions. Word has length 66 [2020-12-22 09:35:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:08,852 INFO L481 AbstractCegarLoop]: Abstraction has 10671 states and 14259 transitions. [2020-12-22 09:35:08,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:35:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 10671 states and 14259 transitions. [2020-12-22 09:35:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:08,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:08,854 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 09:35:08,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:35:08,854 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:08,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2020-12-22 09:35:08,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:08,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124643223] [2020-12-22 09:35:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:08,917 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 09:35:08,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124643223] [2020-12-22 09:35:08,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:08,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:35:08,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718432584] [2020-12-22 09:35:08,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:35:08,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:35:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:08,920 INFO L87 Difference]: Start difference. First operand 10671 states and 14259 transitions. Second operand 6 states. [2020-12-22 09:35:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:09,999 INFO L93 Difference]: Finished difference Result 17448 states and 22795 transitions. [2020-12-22 09:35:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:35:10,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:35:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:10,017 INFO L225 Difference]: With dead ends: 17448 [2020-12-22 09:35:10,017 INFO L226 Difference]: Without dead ends: 8419 [2020-12-22 09:35:10,028 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 09:35:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2020-12-22 09:35:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 8419. [2020-12-22 09:35:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8419 states. [2020-12-22 09:35:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8419 states to 8419 states and 11291 transitions. [2020-12-22 09:35:10,921 INFO L78 Accepts]: Start accepts. Automaton has 8419 states and 11291 transitions. Word has length 66 [2020-12-22 09:35:10,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:10,921 INFO L481 AbstractCegarLoop]: Abstraction has 8419 states and 11291 transitions. [2020-12-22 09:35:10,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:35:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 8419 states and 11291 transitions. [2020-12-22 09:35:10,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:35:10,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:10,923 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 09:35:10,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:35:10,923 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:10,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:10,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2020-12-22 09:35:10,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:10,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803764984] [2020-12-22 09:35:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:10,998 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 09:35:10,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803764984] [2020-12-22 09:35:10,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:10,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:35:10,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345014759] [2020-12-22 09:35:11,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:35:11,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:11,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:35:11,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:35:11,001 INFO L87 Difference]: Start difference. First operand 8419 states and 11291 transitions. Second operand 6 states. [2020-12-22 09:35:11,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:11,879 INFO L93 Difference]: Finished difference Result 13769 states and 17948 transitions. [2020-12-22 09:35:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:35:11,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:35:11,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:11,888 INFO L225 Difference]: With dead ends: 13769 [2020-12-22 09:35:11,888 INFO L226 Difference]: Without dead ends: 6915 [2020-12-22 09:35:11,893 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 09:35:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6915 states. [2020-12-22 09:35:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6915 to 6915. [2020-12-22 09:35:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6915 states. [2020-12-22 09:35:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 9385 transitions. [2020-12-22 09:35:12,467 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 9385 transitions. Word has length 66 [2020-12-22 09:35:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:12,467 INFO L481 AbstractCegarLoop]: Abstraction has 6915 states and 9385 transitions. [2020-12-22 09:35:12,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:35:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 9385 transitions. [2020-12-22 09:35:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:35:12,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:12,469 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 09:35:12,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:35:12,470 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:12,470 INFO L82 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2020-12-22 09:35:12,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:12,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403014936] [2020-12-22 09:35:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:13,051 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 09:35:13,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403014936] [2020-12-22 09:35:13,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062903664] [2020-12-22 09:35:13,052 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 09:35:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:13,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:35:13,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:13,978 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:35:13,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:13,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:14,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:14,270 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2020-12-22 09:35:14,510 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 09:35:14,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:14,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:35:14,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898279978] [2020-12-22 09:35:14,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:35:14,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:14,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:35:14,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:35:14,513 INFO L87 Difference]: Start difference. First operand 6915 states and 9385 transitions. Second operand 26 states. [2020-12-22 09:35:15,271 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:35:15,438 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-12-22 09:35:15,650 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 09:35:15,967 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-12-22 09:35:16,249 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:35:16,524 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:35:16,856 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:35:17,170 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:35:17,509 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-12-22 09:35:17,865 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:35:18,126 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:35:18,323 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:35:18,557 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-22 09:35:19,161 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-12-22 09:35:19,646 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:35:19,876 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 09:35:20,249 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:35:20,617 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 09:35:20,991 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-22 09:35:21,174 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:35:21,345 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 09:35:21,684 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 09:35:22,108 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:35:22,529 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:35:23,041 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:35:23,462 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:35:23,726 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-22 09:35:24,062 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 09:35:24,311 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:35:24,567 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:35:24,872 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:35:25,066 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:35:25,533 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:35:25,914 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 09:35:27,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:27,727 INFO L93 Difference]: Finished difference Result 13221 states and 17220 transitions. [2020-12-22 09:35:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:35:27,728 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-12-22 09:35:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:27,739 INFO L225 Difference]: With dead ends: 13221 [2020-12-22 09:35:27,740 INFO L226 Difference]: Without dead ends: 10406 [2020-12-22 09:35:27,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1298, Invalid=6358, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:35:27,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2020-12-22 09:35:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 6157. [2020-12-22 09:35:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6157 states. [2020-12-22 09:35:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6157 states to 6157 states and 8500 transitions. [2020-12-22 09:35:28,380 INFO L78 Accepts]: Start accepts. Automaton has 6157 states and 8500 transitions. Word has length 67 [2020-12-22 09:35:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:28,381 INFO L481 AbstractCegarLoop]: Abstraction has 6157 states and 8500 transitions. [2020-12-22 09:35:28,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:35:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6157 states and 8500 transitions. [2020-12-22 09:35:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:35:28,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:28,382 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 09:35:28,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:35:28,583 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:28,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2020-12-22 09:35:28,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:28,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382376121] [2020-12-22 09:35:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:29,119 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 09:35:29,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382376121] [2020-12-22 09:35:29,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309370930] [2020-12-22 09:35:29,119 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 09:35:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:29,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:35:29,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:29,544 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:35:30,182 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 09:35:30,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:30,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-12-22 09:35:30,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655233387] [2020-12-22 09:35:30,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:35:30,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:30,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:35:30,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:35:30,185 INFO L87 Difference]: Start difference. First operand 6157 states and 8500 transitions. Second operand 22 states. [2020-12-22 09:35:30,554 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-12-22 09:35:30,750 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:35:30,960 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:35:31,157 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:35:31,450 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-12-22 09:35:32,034 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-12-22 09:35:32,349 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:35:32,550 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-12-22 09:35:32,814 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 09:35:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:33,661 INFO L93 Difference]: Finished difference Result 9399 states and 12593 transitions. [2020-12-22 09:35:33,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:35:33,662 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-22 09:35:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:33,671 INFO L225 Difference]: With dead ends: 9399 [2020-12-22 09:35:33,671 INFO L226 Difference]: Without dead ends: 7213 [2020-12-22 09:35:33,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:35:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2020-12-22 09:35:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 5165. [2020-12-22 09:35:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5165 states. [2020-12-22 09:35:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 7274 transitions. [2020-12-22 09:35:34,129 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 7274 transitions. Word has length 67 [2020-12-22 09:35:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:34,130 INFO L481 AbstractCegarLoop]: Abstraction has 5165 states and 7274 transitions. [2020-12-22 09:35:34,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:35:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 7274 transitions. [2020-12-22 09:35:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:35:34,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:34,131 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 09:35:34,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:34,335 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:34,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2020-12-22 09:35:34,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:34,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931561736] [2020-12-22 09:35:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:34,708 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:35:34,992 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 09:35:34,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931561736] [2020-12-22 09:35:34,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881485966] [2020-12-22 09:35:34,993 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 09:35:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:35,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 09:35:35,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:36,186 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-12-22 09:35:37,269 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 09:35:37,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:37,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2020-12-22 09:35:37,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343024748] [2020-12-22 09:35:37,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 09:35:37,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:37,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 09:35:37,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-12-22 09:35:37,272 INFO L87 Difference]: Start difference. First operand 5165 states and 7274 transitions. Second operand 32 states. [2020-12-22 09:35:38,533 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:35:38,706 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-12-22 09:35:40,486 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:35:40,897 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 09:35:43,082 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:35:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:43,907 INFO L93 Difference]: Finished difference Result 8559 states and 11575 transitions. [2020-12-22 09:35:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 09:35:43,908 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-22 09:35:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:43,916 INFO L225 Difference]: With dead ends: 8559 [2020-12-22 09:35:43,916 INFO L226 Difference]: Without dead ends: 6639 [2020-12-22 09:35:43,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1070, Invalid=4042, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 09:35:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2020-12-22 09:35:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 4215. [2020-12-22 09:35:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2020-12-22 09:35:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 6110 transitions. [2020-12-22 09:35:44,299 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 6110 transitions. Word has length 68 [2020-12-22 09:35:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:44,299 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 6110 transitions. [2020-12-22 09:35:44,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 09:35:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 6110 transitions. [2020-12-22 09:35:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 09:35:44,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:44,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:35:44,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 09:35:44,516 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:44,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1244953701, now seen corresponding path program 1 times [2020-12-22 09:35:44,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:44,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280192653] [2020-12-22 09:35:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:44,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280192653] [2020-12-22 09:35:44,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:35:44,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:35:44,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609836629] [2020-12-22 09:35:44,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:35:44,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:44,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:35:44,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:35:44,648 INFO L87 Difference]: Start difference. First operand 4215 states and 6110 transitions. Second operand 4 states. [2020-12-22 09:36:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:00,650 INFO L93 Difference]: Finished difference Result 7972 states and 13000 transitions. [2020-12-22 09:36:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:36:00,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-12-22 09:36:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:00,664 INFO L225 Difference]: With dead ends: 7972 [2020-12-22 09:36:00,664 INFO L226 Difference]: Without dead ends: 6468 [2020-12-22 09:36:00,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:36:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2020-12-22 09:36:01,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 6468. [2020-12-22 09:36:01,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6468 states. [2020-12-22 09:36:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 9239 transitions. [2020-12-22 09:36:01,222 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 9239 transitions. Word has length 85 [2020-12-22 09:36:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:01,222 INFO L481 AbstractCegarLoop]: Abstraction has 6468 states and 9239 transitions. [2020-12-22 09:36:01,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:36:01,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 9239 transitions. [2020-12-22 09:36:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 09:36:01,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:01,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:36:01,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:36:01,224 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:01,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1576511510, now seen corresponding path program 1 times [2020-12-22 09:36:01,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:01,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948435845] [2020-12-22 09:36:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:01,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948435845] [2020-12-22 09:36:01,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:36:01,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:36:01,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228756433] [2020-12-22 09:36:01,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:36:01,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:36:01,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:36:01,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:36:01,284 INFO L87 Difference]: Start difference. First operand 6468 states and 9239 transitions. Second operand 3 states. [2020-12-22 09:36:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:11,083 INFO L93 Difference]: Finished difference Result 13229 states and 20291 transitions. [2020-12-22 09:36:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:36:11,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 09:36:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:11,100 INFO L225 Difference]: With dead ends: 13229 [2020-12-22 09:36:11,100 INFO L226 Difference]: Without dead ends: 9472 [2020-12-22 09:36:11,107 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 09:36:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9472 states. [2020-12-22 09:36:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9472 to 9472. [2020-12-22 09:36:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9472 states. [2020-12-22 09:36:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 13719 transitions. [2020-12-22 09:36:11,679 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 13719 transitions. Word has length 87 [2020-12-22 09:36:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:11,680 INFO L481 AbstractCegarLoop]: Abstraction has 9472 states and 13719 transitions. [2020-12-22 09:36:11,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:36:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 13719 transitions. [2020-12-22 09:36:11,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 09:36:11,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:11,684 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 09:36:11,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:36:11,684 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:11,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1538014726, now seen corresponding path program 1 times [2020-12-22 09:36:11,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:11,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574223560] [2020-12-22 09:36:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:12,168 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 15 [2020-12-22 09:36:12,336 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 09:36:12,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574223560] [2020-12-22 09:36:12,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644115037] [2020-12-22 09:36:12,336 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 09:36:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:12,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 09:36:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:12,945 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 09:36:13,507 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:36:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:14,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:36:14,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-12-22 09:36:14,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120654553] [2020-12-22 09:36:14,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:36:14,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:36:14,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:36:14,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:36:14,079 INFO L87 Difference]: Start difference. First operand 9472 states and 13719 transitions. Second operand 23 states. [2020-12-22 09:36:14,659 WARN L197 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-22 09:36:15,644 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-12-22 09:36:16,280 WARN L197 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-22 09:36:16,874 WARN L197 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-12-22 09:36:17,487 WARN L197 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-12-22 09:36:18,312 WARN L197 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:36:19,164 WARN L197 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:36:20,347 WARN L197 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:36:21,365 WARN L197 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:36:22,747 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-12-22 09:36:23,873 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2020-12-22 09:36:24,844 WARN L197 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-12-22 09:36:25,940 WARN L197 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:36:26,929 WARN L197 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-12-22 09:36:28,287 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-12-22 09:36:29,962 WARN L197 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:31,452 WARN L197 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:33,073 WARN L197 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:35,604 WARN L197 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:36:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:36,578 INFO L93 Difference]: Finished difference Result 11846 states and 16706 transitions. [2020-12-22 09:36:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 09:36:36,581 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-12-22 09:36:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:36,596 INFO L225 Difference]: With dead ends: 11846 [2020-12-22 09:36:36,596 INFO L226 Difference]: Without dead ends: 9690 [2020-12-22 09:36:36,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:36:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9690 states. [2020-12-22 09:36:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9690 to 9472. [2020-12-22 09:36:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9472 states. [2020-12-22 09:36:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 13667 transitions. [2020-12-22 09:36:37,287 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 13667 transitions. Word has length 110 [2020-12-22 09:36:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:37,287 INFO L481 AbstractCegarLoop]: Abstraction has 9472 states and 13667 transitions. [2020-12-22 09:36:37,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:36:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 13667 transitions. [2020-12-22 09:36:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:36:37,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:37,291 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 09:36:37,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:36:37,505 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:37,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:37,507 INFO L82 PathProgramCache]: Analyzing trace with hash -721276639, now seen corresponding path program 1 times [2020-12-22 09:36:37,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:37,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275605541] [2020-12-22 09:36:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:38,097 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-12-22 09:36:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 25 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:38,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275605541] [2020-12-22 09:36:38,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508006366] [2020-12-22 09:36:38,247 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 09:36:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:38,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 09:36:38,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:39,172 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:36:40,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:36:40,747 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 34 [2020-12-22 09:36:41,072 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-12-22 09:36:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:42,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:36:42,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 29 [2020-12-22 09:36:42,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379866646] [2020-12-22 09:36:42,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:36:42,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:36:42,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:36:42,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:36:42,035 INFO L87 Difference]: Start difference. First operand 9472 states and 13667 transitions. Second operand 30 states. [2020-12-22 09:36:42,303 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:36:43,070 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:36:43,426 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:36:44,160 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:36:44,522 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:36:44,972 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:36:45,247 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:36:45,555 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-22 09:36:45,924 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-12-22 09:36:46,341 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:36:46,623 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-22 09:36:46,876 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:36:47,059 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-12-22 09:36:47,597 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-22 09:36:48,202 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2020-12-22 09:36:48,559 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:36:48,891 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2020-12-22 09:36:49,489 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:36:50,185 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:36:51,025 WARN L197 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 09:36:51,971 WARN L197 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-22 09:36:52,249 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-12-22 09:36:52,678 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:36:53,118 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:36:53,757 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 09:36:54,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:54,548 INFO L93 Difference]: Finished difference Result 11564 states and 16258 transitions. [2020-12-22 09:36:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 09:36:54,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-12-22 09:36:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:54,562 INFO L225 Difference]: With dead ends: 11564 [2020-12-22 09:36:54,562 INFO L226 Difference]: Without dead ends: 10046 [2020-12-22 09:36:54,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=614, Invalid=2926, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 09:36:54,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2020-12-22 09:36:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9472. [2020-12-22 09:36:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9472 states. [2020-12-22 09:36:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 13641 transitions. [2020-12-22 09:36:55,288 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 13641 transitions. Word has length 111 [2020-12-22 09:36:55,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:55,288 INFO L481 AbstractCegarLoop]: Abstraction has 9472 states and 13641 transitions. [2020-12-22 09:36:55,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:36:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 13641 transitions. [2020-12-22 09:36:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:36:55,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:55,295 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:36:55,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:36:55,509 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:55,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:55,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1699429479, now seen corresponding path program 1 times [2020-12-22 09:36:55,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:55,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528108173] [2020-12-22 09:36:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:57,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528108173] [2020-12-22 09:36:57,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664381454] [2020-12-22 09:36:57,310 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 09:36:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 09:36:57,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:58,358 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-12-22 09:36:58,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:58,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:36:59,488 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-22 09:36:59,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:59,841 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-22 09:36:59,852 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:37:00,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:37:00,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:37:00,417 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:37:12,013 WARN L197 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 346 DAG size of output: 45 [2020-12-22 09:37:13,602 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:37:14,981 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:37:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:15,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:15,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 39 [2020-12-22 09:37:15,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986582752] [2020-12-22 09:37:15,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:37:15,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:15,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:37:15,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:37:15,150 INFO L87 Difference]: Start difference. First operand 9472 states and 13641 transitions. Second operand 39 states. [2020-12-22 09:37:15,604 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-22 09:37:17,220 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-12-22 09:37:17,548 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 09:37:18,047 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:37:18,551 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 09:37:18,956 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:37:19,386 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:37:19,975 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:37:20,510 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:37:21,010 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-12-22 09:37:21,839 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-12-22 09:37:22,617 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-12-22 09:37:23,915 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-12-22 09:37:30,942 WARN L197 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-12-22 09:37:31,414 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-12-22 09:37:36,743 WARN L197 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:37:40,945 WARN L197 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-12-22 09:37:41,224 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-12-22 09:37:44,094 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:37:50,822 WARN L197 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-22 09:37:57,627 WARN L197 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-12-22 09:38:01,514 WARN L197 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:38:05,765 WARN L197 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:38:10,010 WARN L197 SmtUtils]: Spent 997.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:38:10,264 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:38:13,013 WARN L197 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:38:13,274 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:38:14,128 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30