/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.4.ufo.UNBOUNDED.pals+Problem12_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:48:50,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:48:50,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:48:50,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:48:50,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:48:50,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:48:50,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:48:50,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:48:50,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:48:50,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:48:50,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:48:50,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:48:50,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:48:50,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:48:50,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:48:50,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:48:50,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:48:50,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:48:50,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:48:50,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:48:50,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:48:50,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:48:50,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:48:50,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:48:50,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:48:50,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:48:50,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:48:50,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:48:50,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:48:50,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:48:50,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:48:50,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:48:50,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:48:50,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:48:50,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:48:50,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:48:50,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:48:50,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:48:50,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:48:50,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:48:50,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:48:50,414 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:48:50,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:48:50,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:48:50,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:48:50,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:48:50,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:48:50,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:48:50,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:48:50,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:48:50,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:48:50,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:48:50,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:48:50,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:48:50,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:48:50,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:48:50,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:48:50,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:48:50,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:48:50,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:48:50,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:48:50,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:48:50,419 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:48:50,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:48:50,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:48:50,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:48:50,875 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:48:50,876 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:48:50,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c [2020-12-22 09:48:50,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ad23a35/0d8e3fc557a840958f57075d12e47849/FLAGd368b728b [2020-12-22 09:48:52,027 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:48:52,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c [2020-12-22 09:48:52,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ad23a35/0d8e3fc557a840958f57075d12e47849/FLAGd368b728b [2020-12-22 09:48:52,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ad23a35/0d8e3fc557a840958f57075d12e47849 [2020-12-22 09:48:52,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:48:52,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:48:52,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:52,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:48:52,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:48:52,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:52" (1/1) ... [2020-12-22 09:48:52,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3612537c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:52, skipping insertion in model container [2020-12-22 09:48:52,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:52" (1/1) ... [2020-12-22 09:48:52,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:48:52,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:48:53,083 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.4.ufo.UNBOUNDED.pals+Problem12_label08.c[8784,8797] [2020-12-22 09:48:53,146 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.4.ufo.UNBOUNDED.pals+Problem12_label08.c[12048,12061] [2020-12-22 09:48:54,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:54,291 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:48:54,417 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.4.ufo.UNBOUNDED.pals+Problem12_label08.c[8784,8797] [2020-12-22 09:48:54,440 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.4.ufo.UNBOUNDED.pals+Problem12_label08.c[12048,12061] [2020-12-22 09:48:55,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:55,087 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:48:55,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55 WrapperNode [2020-12-22 09:48:55,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:55,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:55,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:48:55,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:48:55,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (1/1) ... [2020-12-22 09:48:55,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (1/1) ... [2020-12-22 09:48:55,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:55,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:48:55,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:48:55,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:48:55,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (1/1) ... [2020-12-22 09:48:55,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (1/1) ... [2020-12-22 09:48:55,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (1/1) ... [2020-12-22 09:48:55,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (1/1) ... [2020-12-22 09:48:56,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (1/1) ... [2020-12-22 09:48:56,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (1/1) ... [2020-12-22 09:48:56,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (1/1) ... [2020-12-22 09:48:56,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:48:56,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:48:56,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:48:56,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:48:56,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (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 09:48:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:48:56,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:48:56,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:48:56,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:49:02,925 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:49:02,926 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:49:02,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:49:02 BoogieIcfgContainer [2020-12-22 09:49:02,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:49:02,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:49:02,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:49:02,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:49:02,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:48:52" (1/3) ... [2020-12-22 09:49:02,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50603cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:49:02, skipping insertion in model container [2020-12-22 09:49:02,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:55" (2/3) ... [2020-12-22 09:49:02,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50603cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:49:02, skipping insertion in model container [2020-12-22 09:49:02,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:49:02" (3/3) ... [2020-12-22 09:49:02,938 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c [2020-12-22 09:49:02,944 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:49:02,959 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:49:02,979 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:49:03,031 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:49:03,033 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:49:03,033 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:49:03,033 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:49:03,033 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:49:03,034 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:49:03,034 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:49:03,034 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:49:03,074 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:49:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:49:03,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:03,093 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] [2020-12-22 09:49:03,093 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:03,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2020-12-22 09:49:03,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:03,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851602791] [2020-12-22 09:49:03,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:03,450 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 09:49:03,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851602791] [2020-12-22 09:49:03,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:03,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:49:03,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463352948] [2020-12-22 09:49:03,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:49:03,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:49:03,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:49:03,478 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 2 states. [2020-12-22 09:49:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:03,583 INFO L93 Difference]: Finished difference Result 1757 states and 3334 transitions. [2020-12-22 09:49:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:49:03,584 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:49:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:03,612 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:49:03,612 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:49:03,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:49:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:49:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:49:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:49:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1562 transitions. [2020-12-22 09:49:03,723 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1562 transitions. Word has length 30 [2020-12-22 09:49:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:03,724 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1562 transitions. [2020-12-22 09:49:03,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:49:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1562 transitions. [2020-12-22 09:49:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:49:03,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:03,726 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] [2020-12-22 09:49:03,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:49:03,727 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:03,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:49:03,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:03,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638509231] [2020-12-22 09:49:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:03,898 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 09:49:03,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638509231] [2020-12-22 09:49:03,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:03,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:03,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054534513] [2020-12-22 09:49:03,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:49:03,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:03,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:49:03,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:49:03,903 INFO L87 Difference]: Start difference. First operand 828 states and 1562 transitions. Second operand 5 states. [2020-12-22 09:49:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:04,123 INFO L93 Difference]: Finished difference Result 877 states and 1637 transitions. [2020-12-22 09:49:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:49:04,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:49:04,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:04,132 INFO L225 Difference]: With dead ends: 877 [2020-12-22 09:49:04,132 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:49:04,134 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 09:49:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:49:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:49:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:49:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1539 transitions. [2020-12-22 09:49:04,167 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1539 transitions. Word has length 30 [2020-12-22 09:49:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:04,167 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1539 transitions. [2020-12-22 09:49:04,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:49:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1539 transitions. [2020-12-22 09:49:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:49:04,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:04,174 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] [2020-12-22 09:49:04,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:49:04,175 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2145432749, now seen corresponding path program 1 times [2020-12-22 09:49:04,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:04,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36511199] [2020-12-22 09:49:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:04,277 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 09:49:04,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36511199] [2020-12-22 09:49:04,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:04,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:49:04,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318386872] [2020-12-22 09:49:04,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:04,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:04,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:04,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:04,280 INFO L87 Difference]: Start difference. First operand 828 states and 1539 transitions. Second operand 3 states. [2020-12-22 09:49:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:10,792 INFO L93 Difference]: Finished difference Result 2332 states and 4412 transitions. [2020-12-22 09:49:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:10,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-22 09:49:10,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:10,803 INFO L225 Difference]: With dead ends: 2332 [2020-12-22 09:49:10,804 INFO L226 Difference]: Without dead ends: 1579 [2020-12-22 09:49:10,806 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 09:49:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-12-22 09:49:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2020-12-22 09:49:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-12-22 09:49:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2518 transitions. [2020-12-22 09:49:10,858 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2518 transitions. Word has length 30 [2020-12-22 09:49:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:10,859 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2518 transitions. [2020-12-22 09:49:10,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2518 transitions. [2020-12-22 09:49:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:49:10,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:10,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:10,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:49:10,862 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:10,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:10,863 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:49:10,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:10,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331761339] [2020-12-22 09:49:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:11,008 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 09:49:11,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331761339] [2020-12-22 09:49:11,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:11,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:11,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482231659] [2020-12-22 09:49:11,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:11,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:11,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:11,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:11,013 INFO L87 Difference]: Start difference. First operand 1579 states and 2518 transitions. Second operand 6 states. [2020-12-22 09:49:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:11,275 INFO L93 Difference]: Finished difference Result 1939 states and 3086 transitions. [2020-12-22 09:49:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:49:11,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:49:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:11,289 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 09:49:11,289 INFO L226 Difference]: Without dead ends: 1894 [2020-12-22 09:49:11,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:49:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2020-12-22 09:49:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1622. [2020-12-22 09:49:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1622 states. [2020-12-22 09:49:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2586 transitions. [2020-12-22 09:49:11,339 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2586 transitions. Word has length 52 [2020-12-22 09:49:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:11,339 INFO L481 AbstractCegarLoop]: Abstraction has 1622 states and 2586 transitions. [2020-12-22 09:49:11,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2586 transitions. [2020-12-22 09:49:11,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:11,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:11,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:11,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:49:11,344 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:49:11,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:11,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899175890] [2020-12-22 09:49:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:11,446 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 09:49:11,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899175890] [2020-12-22 09:49:11,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:11,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:11,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541717876] [2020-12-22 09:49:11,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:11,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:11,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:11,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:11,455 INFO L87 Difference]: Start difference. First operand 1622 states and 2586 transitions. Second operand 3 states. [2020-12-22 09:49:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:11,523 INFO L93 Difference]: Finished difference Result 1787 states and 2845 transitions. [2020-12-22 09:49:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:11,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:49:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:11,537 INFO L225 Difference]: With dead ends: 1787 [2020-12-22 09:49:11,537 INFO L226 Difference]: Without dead ends: 1699 [2020-12-22 09:49:11,539 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 09:49:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2020-12-22 09:49:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1695. [2020-12-22 09:49:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-12-22 09:49:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2698 transitions. [2020-12-22 09:49:11,591 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2698 transitions. Word has length 54 [2020-12-22 09:49:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:11,592 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 2698 transitions. [2020-12-22 09:49:11,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2698 transitions. [2020-12-22 09:49:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:11,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:11,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:11,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:49:11,594 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:49:11,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:11,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166043854] [2020-12-22 09:49:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:11,824 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 09:49:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166043854] [2020-12-22 09:49:11,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:11,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:11,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941542210] [2020-12-22 09:49:11,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:11,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:11,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:11,829 INFO L87 Difference]: Start difference. First operand 1695 states and 2698 transitions. Second operand 6 states. [2020-12-22 09:49:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:12,031 INFO L93 Difference]: Finished difference Result 1858 states and 2950 transitions. [2020-12-22 09:49:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:12,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:49:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:12,042 INFO L225 Difference]: With dead ends: 1858 [2020-12-22 09:49:12,042 INFO L226 Difference]: Without dead ends: 1697 [2020-12-22 09:49:12,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:49:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2020-12-22 09:49:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1695. [2020-12-22 09:49:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-12-22 09:49:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2696 transitions. [2020-12-22 09:49:12,091 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2696 transitions. Word has length 54 [2020-12-22 09:49:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:12,093 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 2696 transitions. [2020-12-22 09:49:12,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2696 transitions. [2020-12-22 09:49:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:12,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:12,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:12,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:49:12,098 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:12,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:49:12,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:12,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042842752] [2020-12-22 09:49:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:12,202 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 09:49:12,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042842752] [2020-12-22 09:49:12,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:12,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:12,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739973537] [2020-12-22 09:49:12,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:12,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:12,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:12,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:12,205 INFO L87 Difference]: Start difference. First operand 1695 states and 2696 transitions. Second operand 3 states. [2020-12-22 09:49:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:12,260 INFO L93 Difference]: Finished difference Result 1993 states and 3154 transitions. [2020-12-22 09:49:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:12,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:49:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:12,272 INFO L225 Difference]: With dead ends: 1993 [2020-12-22 09:49:12,272 INFO L226 Difference]: Without dead ends: 1832 [2020-12-22 09:49:12,274 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 09:49:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2020-12-22 09:49:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1830. [2020-12-22 09:49:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1830 states. [2020-12-22 09:49:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2900 transitions. [2020-12-22 09:49:12,329 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2900 transitions. Word has length 54 [2020-12-22 09:49:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:12,330 INFO L481 AbstractCegarLoop]: Abstraction has 1830 states and 2900 transitions. [2020-12-22 09:49:12,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2900 transitions. [2020-12-22 09:49:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:12,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:12,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:12,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:49:12,331 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:12,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:12,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:49:12,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:12,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941932527] [2020-12-22 09:49:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:12,379 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 09:49:12,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941932527] [2020-12-22 09:49:12,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:12,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:12,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353323415] [2020-12-22 09:49:12,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:12,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:12,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:12,382 INFO L87 Difference]: Start difference. First operand 1830 states and 2900 transitions. Second operand 3 states. [2020-12-22 09:49:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:12,442 INFO L93 Difference]: Finished difference Result 2374 states and 3726 transitions. [2020-12-22 09:49:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:12,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:49:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:12,455 INFO L225 Difference]: With dead ends: 2374 [2020-12-22 09:49:12,455 INFO L226 Difference]: Without dead ends: 2078 [2020-12-22 09:49:12,457 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 09:49:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2020-12-22 09:49:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 2076. [2020-12-22 09:49:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2020-12-22 09:49:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3264 transitions. [2020-12-22 09:49:12,525 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3264 transitions. Word has length 54 [2020-12-22 09:49:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:12,525 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 3264 transitions. [2020-12-22 09:49:12,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3264 transitions. [2020-12-22 09:49:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:12,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:12,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:12,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:49:12,527 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:12,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:49:12,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:12,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811397030] [2020-12-22 09:49:12,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:12,573 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 09:49:12,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811397030] [2020-12-22 09:49:12,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:12,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:12,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467905295] [2020-12-22 09:49:12,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:12,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:12,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:12,577 INFO L87 Difference]: Start difference. First operand 2076 states and 3264 transitions. Second operand 3 states. [2020-12-22 09:49:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:12,657 INFO L93 Difference]: Finished difference Result 3064 states and 4738 transitions. [2020-12-22 09:49:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:12,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:49:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:12,671 INFO L225 Difference]: With dead ends: 3064 [2020-12-22 09:49:12,671 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:49:12,674 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 09:49:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:49:12,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2520. [2020-12-22 09:49:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2020-12-22 09:49:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3904 transitions. [2020-12-22 09:49:12,774 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3904 transitions. Word has length 54 [2020-12-22 09:49:12,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:12,775 INFO L481 AbstractCegarLoop]: Abstraction has 2520 states and 3904 transitions. [2020-12-22 09:49:12,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3904 transitions. [2020-12-22 09:49:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:49:12,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:12,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:12,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:49:12,776 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:12,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:49:12,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:12,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233352041] [2020-12-22 09:49:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:12,881 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 09:49:12,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233352041] [2020-12-22 09:49:12,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:12,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:12,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583269798] [2020-12-22 09:49:12,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:49:12,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:12,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:49:12,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:49:12,887 INFO L87 Difference]: Start difference. First operand 2520 states and 3904 transitions. Second operand 5 states. [2020-12-22 09:49:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:13,085 INFO L93 Difference]: Finished difference Result 3274 states and 4989 transitions. [2020-12-22 09:49:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:49:13,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:49:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:13,106 INFO L225 Difference]: With dead ends: 3274 [2020-12-22 09:49:13,107 INFO L226 Difference]: Without dead ends: 3272 [2020-12-22 09:49:13,109 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 09:49:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2020-12-22 09:49:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2568. [2020-12-22 09:49:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-12-22 09:49:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3944 transitions. [2020-12-22 09:49:13,239 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3944 transitions. Word has length 55 [2020-12-22 09:49:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:13,240 INFO L481 AbstractCegarLoop]: Abstraction has 2568 states and 3944 transitions. [2020-12-22 09:49:13,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:49:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3944 transitions. [2020-12-22 09:49:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:49:13,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:13,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:13,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:49:13,241 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:49:13,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:13,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079916651] [2020-12-22 09:49:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:13,303 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 09:49:13,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079916651] [2020-12-22 09:49:13,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:13,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:13,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163464563] [2020-12-22 09:49:13,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:13,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:13,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:13,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:13,309 INFO L87 Difference]: Start difference. First operand 2568 states and 3944 transitions. Second operand 3 states. [2020-12-22 09:49:13,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:13,429 INFO L93 Difference]: Finished difference Result 3631 states and 5502 transitions. [2020-12-22 09:49:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:13,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:49:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:13,446 INFO L225 Difference]: With dead ends: 3631 [2020-12-22 09:49:13,447 INFO L226 Difference]: Without dead ends: 3036 [2020-12-22 09:49:13,449 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 09:49:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2020-12-22 09:49:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 3034. [2020-12-22 09:49:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:49:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4602 transitions. [2020-12-22 09:49:13,598 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4602 transitions. Word has length 56 [2020-12-22 09:49:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:13,598 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4602 transitions. [2020-12-22 09:49:13,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4602 transitions. [2020-12-22 09:49:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:13,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:13,603 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:13,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:49:13,604 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:13,604 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:49:13,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:13,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395917848] [2020-12-22 09:49:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:49:13,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395917848] [2020-12-22 09:49:13,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:13,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:13,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367791306] [2020-12-22 09:49:13,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:13,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:13,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:13,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:13,719 INFO L87 Difference]: Start difference. First operand 3034 states and 4602 transitions. Second operand 6 states. [2020-12-22 09:49:14,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:14,400 INFO L93 Difference]: Finished difference Result 9340 states and 13643 transitions. [2020-12-22 09:49:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:14,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:14,454 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:49:14,454 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:49:14,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:49:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:49:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:49:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:49:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6730 transitions. [2020-12-22 09:49:14,770 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6730 transitions. Word has length 78 [2020-12-22 09:49:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:14,770 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 6730 transitions. [2020-12-22 09:49:14,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6730 transitions. [2020-12-22 09:49:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:14,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:14,777 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:14,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:49:14,777 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:14,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:49:14,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:14,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527692021] [2020-12-22 09:49:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:49:14,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527692021] [2020-12-22 09:49:14,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:14,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:14,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655125624] [2020-12-22 09:49:14,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:14,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:14,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:14,903 INFO L87 Difference]: Start difference. First operand 4530 states and 6730 transitions. Second operand 6 states. [2020-12-22 09:49:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:15,469 INFO L93 Difference]: Finished difference Result 10836 states and 15771 transitions. [2020-12-22 09:49:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:15,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:15,495 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:49:15,495 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:49:15,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:49:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:49:15,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:49:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:49:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9902 transitions. [2020-12-22 09:49:15,941 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9902 transitions. Word has length 78 [2020-12-22 09:49:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:15,942 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 9902 transitions. [2020-12-22 09:49:15,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9902 transitions. [2020-12-22 09:49:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:15,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:15,945 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:15,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:49:15,945 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:49:15,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:15,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142704551] [2020-12-22 09:49:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:49:16,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142704551] [2020-12-22 09:49:16,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:16,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:16,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240768070] [2020-12-22 09:49:16,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:16,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:16,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:16,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:16,051 INFO L87 Difference]: Start difference. First operand 6778 states and 9902 transitions. Second operand 6 states. [2020-12-22 09:49:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:16,874 INFO L93 Difference]: Finished difference Result 12332 states and 17899 transitions. [2020-12-22 09:49:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:16,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:16,903 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:49:16,904 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:49:16,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:49:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:49:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:49:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:49:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12030 transitions. [2020-12-22 09:49:17,568 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12030 transitions. Word has length 78 [2020-12-22 09:49:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:17,569 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12030 transitions. [2020-12-22 09:49:17,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12030 transitions. [2020-12-22 09:49:17,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:49:17,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:17,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:17,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:49:17,573 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:17,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:49:17,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:17,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609776072] [2020-12-22 09:49:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:17,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609776072] [2020-12-22 09:49:17,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:17,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:17,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047627369] [2020-12-22 09:49:17,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:17,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:17,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:17,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:17,677 INFO L87 Difference]: Start difference. First operand 8274 states and 12030 transitions. Second operand 3 states. [2020-12-22 09:49:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:17,996 INFO L93 Difference]: Finished difference Result 13055 states and 18902 transitions. [2020-12-22 09:49:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:17,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:49:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:18,013 INFO L225 Difference]: With dead ends: 13055 [2020-12-22 09:49:18,013 INFO L226 Difference]: Without dead ends: 6317 [2020-12-22 09:49:18,024 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 09:49:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2020-12-22 09:49:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6315. [2020-12-22 09:49:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6315 states. [2020-12-22 09:49:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 9247 transitions. [2020-12-22 09:49:18,350 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 9247 transitions. Word has length 80 [2020-12-22 09:49:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:18,350 INFO L481 AbstractCegarLoop]: Abstraction has 6315 states and 9247 transitions. [2020-12-22 09:49:18,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 9247 transitions. [2020-12-22 09:49:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:49:18,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:18,353 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:18,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:49:18,355 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:18,356 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:49:18,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:18,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888013054] [2020-12-22 09:49:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:49:18,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888013054] [2020-12-22 09:49:18,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:18,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:18,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313565636] [2020-12-22 09:49:18,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:18,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:18,564 INFO L87 Difference]: Start difference. First operand 6315 states and 9247 transitions. Second operand 6 states. [2020-12-22 09:49:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:19,018 INFO L93 Difference]: Finished difference Result 10549 states and 15332 transitions. [2020-12-22 09:49:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:19,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:49:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:19,043 INFO L225 Difference]: With dead ends: 10549 [2020-12-22 09:49:19,043 INFO L226 Difference]: Without dead ends: 9491 [2020-12-22 09:49:19,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:49:19,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2020-12-22 09:49:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7371. [2020-12-22 09:49:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7371 states. [2020-12-22 09:49:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7371 states to 7371 states and 10751 transitions. [2020-12-22 09:49:19,529 INFO L78 Accepts]: Start accepts. Automaton has 7371 states and 10751 transitions. Word has length 80 [2020-12-22 09:49:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:19,529 INFO L481 AbstractCegarLoop]: Abstraction has 7371 states and 10751 transitions. [2020-12-22 09:49:19,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 7371 states and 10751 transitions. [2020-12-22 09:49:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:19,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:19,533 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:19,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:49:19,533 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:19,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:49:19,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:19,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499335146] [2020-12-22 09:49:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:19,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499335146] [2020-12-22 09:49:19,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:19,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:19,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286266256] [2020-12-22 09:49:19,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:19,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:19,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:19,629 INFO L87 Difference]: Start difference. First operand 7371 states and 10751 transitions. Second operand 3 states. [2020-12-22 09:49:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:19,917 INFO L93 Difference]: Finished difference Result 10279 states and 14889 transitions. [2020-12-22 09:49:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:19,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:49:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:19,933 INFO L225 Difference]: With dead ends: 10279 [2020-12-22 09:49:19,933 INFO L226 Difference]: Without dead ends: 4469 [2020-12-22 09:49:19,944 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 09:49:19,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2020-12-22 09:49:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4467. [2020-12-22 09:49:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4467 states. [2020-12-22 09:49:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6571 transitions. [2020-12-22 09:49:20,289 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6571 transitions. Word has length 81 [2020-12-22 09:49:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:20,289 INFO L481 AbstractCegarLoop]: Abstraction has 4467 states and 6571 transitions. [2020-12-22 09:49:20,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6571 transitions. [2020-12-22 09:49:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:20,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:20,293 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:20,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:49:20,294 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:20,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:49:20,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:20,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432044122] [2020-12-22 09:49:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:20,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432044122] [2020-12-22 09:49:20,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:20,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:20,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532937484] [2020-12-22 09:49:20,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:20,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:20,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:20,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:20,397 INFO L87 Difference]: Start difference. First operand 4467 states and 6571 transitions. Second operand 3 states. [2020-12-22 09:49:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:20,535 INFO L93 Difference]: Finished difference Result 5923 states and 8619 transitions. [2020-12-22 09:49:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:20,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:49:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:20,543 INFO L225 Difference]: With dead ends: 5923 [2020-12-22 09:49:20,543 INFO L226 Difference]: Without dead ends: 3017 [2020-12-22 09:49:20,550 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 09:49:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2020-12-22 09:49:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 3015. [2020-12-22 09:49:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3015 states. [2020-12-22 09:49:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4503 transitions. [2020-12-22 09:49:20,710 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4503 transitions. Word has length 81 [2020-12-22 09:49:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:20,710 INFO L481 AbstractCegarLoop]: Abstraction has 3015 states and 4503 transitions. [2020-12-22 09:49:20,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4503 transitions. [2020-12-22 09:49:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:20,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:20,712 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] [2020-12-22 09:49:20,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:49:20,713 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:20,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:49:20,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:20,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430512644] [2020-12-22 09:49:20,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:20,781 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 09:49:20,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430512644] [2020-12-22 09:49:20,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:20,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:20,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398856259] [2020-12-22 09:49:20,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:20,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:20,785 INFO L87 Difference]: Start difference. First operand 3015 states and 4503 transitions. Second operand 3 states. [2020-12-22 09:49:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:20,873 INFO L93 Difference]: Finished difference Result 3745 states and 5517 transitions. [2020-12-22 09:49:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:20,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:49:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:20,880 INFO L225 Difference]: With dead ends: 3745 [2020-12-22 09:49:20,881 INFO L226 Difference]: Without dead ends: 2291 [2020-12-22 09:49:20,883 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 09:49:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2020-12-22 09:49:21,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2289. [2020-12-22 09:49:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 09:49:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3480 transitions. [2020-12-22 09:49:21,049 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3480 transitions. Word has length 81 [2020-12-22 09:49:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:21,049 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 3480 transitions. [2020-12-22 09:49:21,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3480 transitions. [2020-12-22 09:49:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:21,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:21,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:21,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:49:21,052 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:21,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:21,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:49:21,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:21,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5512925] [2020-12-22 09:49:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:21,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5512925] [2020-12-22 09:49:21,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838195199] [2020-12-22 09:49:21,317 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 09:49:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:21,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:49:21,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:49:21,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:21,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:49:21,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428130221] [2020-12-22 09:49:21,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:49:21,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:21,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:49:21,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:49:21,793 INFO L87 Difference]: Start difference. First operand 2289 states and 3480 transitions. Second operand 12 states. [2020-12-22 09:49:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:23,599 INFO L93 Difference]: Finished difference Result 5722 states and 8129 transitions. [2020-12-22 09:49:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:49:23,600 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:49:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:23,614 INFO L225 Difference]: With dead ends: 5722 [2020-12-22 09:49:23,614 INFO L226 Difference]: Without dead ends: 4994 [2020-12-22 09:49:23,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:49:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2020-12-22 09:49:23,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4081. [2020-12-22 09:49:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4081 states. [2020-12-22 09:49:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 5769 transitions. [2020-12-22 09:49:23,965 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 5769 transitions. Word has length 81 [2020-12-22 09:49:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:23,966 INFO L481 AbstractCegarLoop]: Abstraction has 4081 states and 5769 transitions. [2020-12-22 09:49:23,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:49:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 5769 transitions. [2020-12-22 09:49:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:23,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:23,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:24,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:24,184 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:24,184 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:49:24,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:24,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656433035] [2020-12-22 09:49:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:24,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656433035] [2020-12-22 09:49:24,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176116917] [2020-12-22 09:49:24,541 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 09:49:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:24,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:49:24,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:25,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:25,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:25,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:25,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377691748] [2020-12-22 09:49:25,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:25,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:25,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:25,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:25,504 INFO L87 Difference]: Start difference. First operand 4081 states and 5769 transitions. Second operand 17 states. [2020-12-22 09:49:25,636 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:49:26,740 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 09:49:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:28,775 INFO L93 Difference]: Finished difference Result 14199 states and 18925 transitions. [2020-12-22 09:49:28,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:28,776 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:49:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:28,805 INFO L225 Difference]: With dead ends: 14199 [2020-12-22 09:49:28,805 INFO L226 Difference]: Without dead ends: 11892 [2020-12-22 09:49:28,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:49:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11892 states. [2020-12-22 09:49:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11892 to 8112. [2020-12-22 09:49:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8112 states. [2020-12-22 09:49:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 10951 transitions. [2020-12-22 09:49:29,603 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 10951 transitions. Word has length 82 [2020-12-22 09:49:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:29,603 INFO L481 AbstractCegarLoop]: Abstraction has 8112 states and 10951 transitions. [2020-12-22 09:49:29,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:29,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 10951 transitions. [2020-12-22 09:49:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:29,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:29,605 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:29,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:29,820 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:29,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:49:29,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:29,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63932170] [2020-12-22 09:49:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:30,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63932170] [2020-12-22 09:49:30,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769929684] [2020-12-22 09:49:30,042 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 09:49:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:49:30,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:30,329 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:30,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:30,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:30,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853338235] [2020-12-22 09:49:30,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:30,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:30,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:30,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:30,601 INFO L87 Difference]: Start difference. First operand 8112 states and 10951 transitions. Second operand 17 states. [2020-12-22 09:49:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:34,366 INFO L93 Difference]: Finished difference Result 32062 states and 42174 transitions. [2020-12-22 09:49:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:34,369 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:49:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:34,434 INFO L225 Difference]: With dead ends: 32062 [2020-12-22 09:49:34,434 INFO L226 Difference]: Without dead ends: 26546 [2020-12-22 09:49:34,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:49:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26546 states. [2020-12-22 09:49:36,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26546 to 18920. [2020-12-22 09:49:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18920 states. [2020-12-22 09:49:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18920 states to 18920 states and 24685 transitions. [2020-12-22 09:49:36,501 INFO L78 Accepts]: Start accepts. Automaton has 18920 states and 24685 transitions. Word has length 82 [2020-12-22 09:49:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:36,501 INFO L481 AbstractCegarLoop]: Abstraction has 18920 states and 24685 transitions. [2020-12-22 09:49:36,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 18920 states and 24685 transitions. [2020-12-22 09:49:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:36,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:36,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:36,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:49:36,705 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:49:36,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:36,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451864623] [2020-12-22 09:49:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:49:36,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451864623] [2020-12-22 09:49:36,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:36,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:36,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352918000] [2020-12-22 09:49:36,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:36,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:36,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:36,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:36,810 INFO L87 Difference]: Start difference. First operand 18920 states and 24685 transitions. Second operand 6 states. [2020-12-22 09:49:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:38,182 INFO L93 Difference]: Finished difference Result 33364 states and 43285 transitions. [2020-12-22 09:49:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:38,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:38,213 INFO L225 Difference]: With dead ends: 33364 [2020-12-22 09:49:38,213 INFO L226 Difference]: Without dead ends: 16077 [2020-12-22 09:49:38,233 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 09:49:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16077 states. [2020-12-22 09:49:39,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16077 to 16077. [2020-12-22 09:49:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16077 states. [2020-12-22 09:49:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16077 states to 16077 states and 20801 transitions. [2020-12-22 09:49:39,699 INFO L78 Accepts]: Start accepts. Automaton has 16077 states and 20801 transitions. Word has length 82 [2020-12-22 09:49:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:39,699 INFO L481 AbstractCegarLoop]: Abstraction has 16077 states and 20801 transitions. [2020-12-22 09:49:39,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 16077 states and 20801 transitions. [2020-12-22 09:49:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:39,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:39,702 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:39,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:49:39,702 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:39,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:39,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:49:39,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:39,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238123056] [2020-12-22 09:49:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:49:39,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238123056] [2020-12-22 09:49:39,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:39,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:39,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495564579] [2020-12-22 09:49:39,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:39,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:39,796 INFO L87 Difference]: Start difference. First operand 16077 states and 20801 transitions. Second operand 6 states. [2020-12-22 09:49:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:41,214 INFO L93 Difference]: Finished difference Result 26822 states and 34466 transitions. [2020-12-22 09:49:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:41,215 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:41,239 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 09:49:41,240 INFO L226 Difference]: Without dead ends: 12404 [2020-12-22 09:49:41,257 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 09:49:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2020-12-22 09:49:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 12404. [2020-12-22 09:49:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12404 states. [2020-12-22 09:49:42,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12404 states to 12404 states and 16023 transitions. [2020-12-22 09:49:42,466 INFO L78 Accepts]: Start accepts. Automaton has 12404 states and 16023 transitions. Word has length 82 [2020-12-22 09:49:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:42,466 INFO L481 AbstractCegarLoop]: Abstraction has 12404 states and 16023 transitions. [2020-12-22 09:49:42,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 12404 states and 16023 transitions. [2020-12-22 09:49:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:42,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:42,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:42,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:49:42,469 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:42,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:49:42,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:42,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282496319] [2020-12-22 09:49:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:49:42,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282496319] [2020-12-22 09:49:42,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:42,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:42,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341509817] [2020-12-22 09:49:42,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:42,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:42,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:42,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:42,545 INFO L87 Difference]: Start difference. First operand 12404 states and 16023 transitions. Second operand 6 states. [2020-12-22 09:49:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:43,520 INFO L93 Difference]: Finished difference Result 20759 states and 26584 transitions. [2020-12-22 09:49:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:43,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:43,536 INFO L225 Difference]: With dead ends: 20759 [2020-12-22 09:49:43,537 INFO L226 Difference]: Without dead ends: 9932 [2020-12-22 09:49:43,547 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 09:49:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9932 states. [2020-12-22 09:49:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9932 to 9932. [2020-12-22 09:49:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9932 states. [2020-12-22 09:49:44,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9932 states to 9932 states and 12904 transitions. [2020-12-22 09:49:44,649 INFO L78 Accepts]: Start accepts. Automaton has 9932 states and 12904 transitions. Word has length 82 [2020-12-22 09:49:44,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:44,650 INFO L481 AbstractCegarLoop]: Abstraction has 9932 states and 12904 transitions. [2020-12-22 09:49:44,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:44,650 INFO L276 IsEmpty]: Start isEmpty. Operand 9932 states and 12904 transitions. [2020-12-22 09:49:44,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:44,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:44,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:44,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:49:44,651 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:44,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:49:44,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:44,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622044072] [2020-12-22 09:49:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:44,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622044072] [2020-12-22 09:49:44,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503395313] [2020-12-22 09:49:44,908 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 09:49:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:45,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:49:45,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:45,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:45,683 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2020-12-22 09:49:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:46,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:46,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:46,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470317091] [2020-12-22 09:49:46,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:46,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:46,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:46,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:46,032 INFO L87 Difference]: Start difference. First operand 9932 states and 12904 transitions. Second operand 17 states. [2020-12-22 09:49:46,182 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 09:49:46,391 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:49:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:51,742 INFO L93 Difference]: Finished difference Result 42734 states and 53344 transitions. [2020-12-22 09:49:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:51,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:49:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:51,781 INFO L225 Difference]: With dead ends: 42734 [2020-12-22 09:49:51,781 INFO L226 Difference]: Without dead ends: 35713 [2020-12-22 09:49:51,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:49:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35713 states. [2020-12-22 09:49:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35713 to 22851. [2020-12-22 09:49:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22851 states. [2020-12-22 09:49:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22851 states to 22851 states and 28953 transitions. [2020-12-22 09:49:54,180 INFO L78 Accepts]: Start accepts. Automaton has 22851 states and 28953 transitions. Word has length 83 [2020-12-22 09:49:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:54,180 INFO L481 AbstractCegarLoop]: Abstraction has 22851 states and 28953 transitions. [2020-12-22 09:49:54,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:54,180 INFO L276 IsEmpty]: Start isEmpty. Operand 22851 states and 28953 transitions. [2020-12-22 09:49:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:54,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:54,184 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:54,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:54,400 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:49:54,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:54,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141671806] [2020-12-22 09:49:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:49:54,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141671806] [2020-12-22 09:49:54,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:54,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:54,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127653125] [2020-12-22 09:49:54,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:54,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:54,493 INFO L87 Difference]: Start difference. First operand 22851 states and 28953 transitions. Second operand 6 states. [2020-12-22 09:49:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:56,654 INFO L93 Difference]: Finished difference Result 38944 states and 48909 transitions. [2020-12-22 09:49:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:56,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:49:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:56,674 INFO L225 Difference]: With dead ends: 38944 [2020-12-22 09:49:56,674 INFO L226 Difference]: Without dead ends: 17826 [2020-12-22 09:49:56,692 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 09:49:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17826 states. [2020-12-22 09:49:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17826 to 17826. [2020-12-22 09:49:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17826 states. [2020-12-22 09:49:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17826 states to 17826 states and 22350 transitions. [2020-12-22 09:49:58,685 INFO L78 Accepts]: Start accepts. Automaton has 17826 states and 22350 transitions. Word has length 83 [2020-12-22 09:49:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:58,685 INFO L481 AbstractCegarLoop]: Abstraction has 17826 states and 22350 transitions. [2020-12-22 09:49:58,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 17826 states and 22350 transitions. [2020-12-22 09:49:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:49:58,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:58,687 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:58,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:49:58,688 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:58,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:58,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:49:58,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:58,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458914003] [2020-12-22 09:49:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:00,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458914003] [2020-12-22 09:50:00,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143164060] [2020-12-22 09:50:00,347 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 09:50:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:00,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:50:00,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:00,949 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:01,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:01,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2020-12-22 09:50:01,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504603992] [2020-12-22 09:50:01,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 09:50:01,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 09:50:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 09:50:01,808 INFO L87 Difference]: Start difference. First operand 17826 states and 22350 transitions. Second operand 40 states. [2020-12-22 09:50:02,213 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 09:50:03,481 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-22 09:50:03,776 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:50:04,012 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 09:50:04,318 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:50:04,688 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 09:50:05,167 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-22 09:50:05,639 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-12-22 09:50:06,161 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-12-22 09:50:06,675 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-12-22 09:50:07,003 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:50:07,359 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:50:07,618 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:50:07,954 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:50:08,218 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:50:08,567 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:50:08,812 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:50:09,274 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:50:09,492 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:50:09,978 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 09:50:10,413 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:50:10,755 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:50:11,518 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:50:11,748 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:50:11,987 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:50:12,325 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:50:12,802 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:50:13,025 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:50:13,211 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:50:13,646 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:50:14,475 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:50:15,008 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:16,120 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:50:17,352 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 09:50:17,698 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:50:17,951 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:50:18,487 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:50:18,763 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:50:19,126 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:50:19,376 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:50:19,619 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:50:19,798 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:50:19,999 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:50:20,209 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:20,555 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 09:50:20,760 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:50:21,167 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-12-22 09:50:21,444 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 09:50:21,807 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:50:22,015 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:50:22,377 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:50:22,704 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:50:22,944 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:50:23,634 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-12-22 09:50:23,842 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:50:24,183 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:24,885 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:50:25,119 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:50:25,395 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:50:28,511 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-22 09:50:28,862 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:50:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:29,973 INFO L93 Difference]: Finished difference Result 30408 states and 38180 transitions. [2020-12-22 09:50:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 09:50:29,974 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-12-22 09:50:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:29,999 INFO L225 Difference]: With dead ends: 30408 [2020-12-22 09:50:29,999 INFO L226 Difference]: Without dead ends: 24257 [2020-12-22 09:50:30,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=2729, Invalid=17011, Unknown=0, NotChecked=0, Total=19740 [2020-12-22 09:50:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24257 states. [2020-12-22 09:50:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24257 to 16024. [2020-12-22 09:50:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16024 states. [2020-12-22 09:50:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16024 states to 16024 states and 20211 transitions. [2020-12-22 09:50:31,848 INFO L78 Accepts]: Start accepts. Automaton has 16024 states and 20211 transitions. Word has length 84 [2020-12-22 09:50:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:31,848 INFO L481 AbstractCegarLoop]: Abstraction has 16024 states and 20211 transitions. [2020-12-22 09:50:31,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 09:50:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 16024 states and 20211 transitions. [2020-12-22 09:50:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:50:31,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:31,851 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:32,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:50:32,065 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:32,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:50:32,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:32,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042863469] [2020-12-22 09:50:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:32,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042863469] [2020-12-22 09:50:32,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297895596] [2020-12-22 09:50:32,735 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 09:50:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:50:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:33,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:33,596 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:50:34,084 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 09:50:34,429 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-22 09:50:34,530 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 09:50:34,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:34,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-12-22 09:50:34,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769539927] [2020-12-22 09:50:34,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:50:34,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:50:34,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:50:34,533 INFO L87 Difference]: Start difference. First operand 16024 states and 20211 transitions. Second operand 23 states. [2020-12-22 09:50:34,734 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:50:35,366 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:50:35,604 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:35,814 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 09:50:36,222 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:50:36,477 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 09:50:36,793 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 09:50:37,343 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:37,889 WARN L197 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:38,517 WARN L197 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:38,962 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:50:39,455 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-12-22 09:50:39,868 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-22 09:50:40,377 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:50:40,601 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:50:40,925 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 09:50:41,207 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:50:41,638 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:50:42,220 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 09:50:42,461 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:50:42,995 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:50:43,764 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-12-22 09:50:43,973 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:50:44,249 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 09:50:44,595 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:50:45,193 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 09:50:45,566 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 09:50:46,208 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:50:46,487 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:50:46,674 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:47,254 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:47,555 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:47,815 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:47,997 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:48,342 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:48,719 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:48,932 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:49,234 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:49,665 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:49,994 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:50,619 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:50:50,877 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:50:51,166 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:50:51,843 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:50:52,228 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:50:52,522 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:50:52,918 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:50:53,385 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 09:50:53,959 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:50:54,528 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:50:54,763 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:50:55,217 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 09:50:55,546 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:50:55,910 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:50:57,708 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 09:50:58,404 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 09:50:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:59,978 INFO L93 Difference]: Finished difference Result 30140 states and 38336 transitions. [2020-12-22 09:50:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:50:59,979 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 09:50:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:00,013 INFO L225 Difference]: With dead ends: 30140 [2020-12-22 09:51:00,014 INFO L226 Difference]: Without dead ends: 21459 [2020-12-22 09:51:00,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=1522, Invalid=10468, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 09:51:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21459 states. [2020-12-22 09:51:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21459 to 11771. [2020-12-22 09:51:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11771 states. [2020-12-22 09:51:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11771 states to 11771 states and 15069 transitions. [2020-12-22 09:51:01,658 INFO L78 Accepts]: Start accepts. Automaton has 11771 states and 15069 transitions. Word has length 84 [2020-12-22 09:51:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:01,658 INFO L481 AbstractCegarLoop]: Abstraction has 11771 states and 15069 transitions. [2020-12-22 09:51:01,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:51:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 11771 states and 15069 transitions. [2020-12-22 09:51:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:51:01,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:01,660 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:01,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:51:01,876 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash -696943534, now seen corresponding path program 1 times [2020-12-22 09:51:01,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:01,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370535478] [2020-12-22 09:51:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:02,417 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-12-22 09:51:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:02,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370535478] [2020-12-22 09:51:02,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247486667] [2020-12-22 09:51:02,749 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 09:51:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:02,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:51:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:03,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:51:03,745 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-12-22 09:51:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:04,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:04,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 09:51:04,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182428641] [2020-12-22 09:51:04,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:51:04,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:04,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:51:04,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:51:04,550 INFO L87 Difference]: Start difference. First operand 11771 states and 15069 transitions. Second operand 24 states. [2020-12-22 09:51:05,281 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-12-22 09:51:05,657 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:51:06,037 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:51:06,334 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 09:51:06,556 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 09:51:06,839 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:51:07,189 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 09:51:07,710 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 09:51:08,336 WARN L197 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 09:51:08,581 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-12-22 09:51:09,020 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 09:51:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:11,278 INFO L93 Difference]: Finished difference Result 18601 states and 23329 transitions. [2020-12-22 09:51:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:51:11,280 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-22 09:51:11,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:11,300 INFO L225 Difference]: With dead ends: 18601 [2020-12-22 09:51:11,300 INFO L226 Difference]: Without dead ends: 13706 [2020-12-22 09:51:11,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 09:51:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-12-22 09:51:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 9679. [2020-12-22 09:51:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9679 states. [2020-12-22 09:51:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 12538 transitions. [2020-12-22 09:51:12,590 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 12538 transitions. Word has length 86 [2020-12-22 09:51:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:12,590 INFO L481 AbstractCegarLoop]: Abstraction has 9679 states and 12538 transitions. [2020-12-22 09:51:12,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:51:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 12538 transitions. [2020-12-22 09:51:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 09:51:12,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:12,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:12,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:12,807 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash 713696573, now seen corresponding path program 1 times [2020-12-22 09:51:12,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:12,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251591256] [2020-12-22 09:51:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:12,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251591256] [2020-12-22 09:51:12,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:12,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:51:12,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156005272] [2020-12-22 09:51:12,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:12,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:12,897 INFO L87 Difference]: Start difference. First operand 9679 states and 12538 transitions. Second operand 3 states. [2020-12-22 09:51:24,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:24,124 INFO L93 Difference]: Finished difference Result 12687 states and 17370 transitions. [2020-12-22 09:51:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:24,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 09:51:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:24,140 INFO L225 Difference]: With dead ends: 12687 [2020-12-22 09:51:24,140 INFO L226 Difference]: Without dead ends: 11183 [2020-12-22 09:51:24,144 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 09:51:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11183 states. [2020-12-22 09:51:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11183 to 11181. [2020-12-22 09:51:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11181 states. [2020-12-22 09:51:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 14509 transitions. [2020-12-22 09:51:25,408 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 14509 transitions. Word has length 105 [2020-12-22 09:51:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:25,408 INFO L481 AbstractCegarLoop]: Abstraction has 11181 states and 14509 transitions. [2020-12-22 09:51:25,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 14509 transitions. [2020-12-22 09:51:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:51:25,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:25,414 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:25,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 09:51:25,415 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash 895169396, now seen corresponding path program 1 times [2020-12-22 09:51:25,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:25,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480504505] [2020-12-22 09:51:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:25,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480504505] [2020-12-22 09:51:25,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:25,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:25,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829032683] [2020-12-22 09:51:25,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:51:25,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:25,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:51:25,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:51:25,564 INFO L87 Difference]: Start difference. First operand 11181 states and 14509 transitions. Second operand 4 states. [2020-12-22 09:51:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:43,192 INFO L93 Difference]: Finished difference Result 17942 states and 24153 transitions. [2020-12-22 09:51:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:51:43,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 09:51:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:43,214 INFO L225 Difference]: With dead ends: 17942 [2020-12-22 09:51:43,214 INFO L226 Difference]: Without dead ends: 14936 [2020-12-22 09:51:43,218 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 09:51:43,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14936 states. [2020-12-22 09:51:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14936 to 14936. [2020-12-22 09:51:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14936 states. [2020-12-22 09:51:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14936 states to 14936 states and 19506 transitions. [2020-12-22 09:51:44,527 INFO L78 Accepts]: Start accepts. Automaton has 14936 states and 19506 transitions. Word has length 134 [2020-12-22 09:51:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:44,528 INFO L481 AbstractCegarLoop]: Abstraction has 14936 states and 19506 transitions. [2020-12-22 09:51:44,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:51:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 14936 states and 19506 transitions. [2020-12-22 09:51:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:51:44,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:44,533 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:44,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 09:51:44,534 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:44,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:51:44,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:44,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085197072] [2020-12-22 09:51:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:44,991 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:51:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:45,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085197072] [2020-12-22 09:51:45,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893705797] [2020-12-22 09:51:45,301 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 09:51:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:45,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:51:45,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:51:45,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:45,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:51:45,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136264396] [2020-12-22 09:51:45,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:51:45,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:45,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:51:45,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:51:45,969 INFO L87 Difference]: Start difference. First operand 14936 states and 19506 transitions. Second operand 15 states. [2020-12-22 09:51:46,120 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:51:46,698 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:51:46,966 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:51:47,139 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:47,493 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:47,835 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:48,206 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:51:48,404 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:48,601 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:48,908 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:49,095 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:51:49,291 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:50,062 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:50,677 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:51:50,889 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:51,106 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:51,488 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:51,708 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 09:51:51,889 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:51:52,608 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:51:53,278 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:51:53,482 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:53,681 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:54,179 INFO L93 Difference]: Finished difference Result 26817 states and 34172 transitions. [2020-12-22 09:51:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:51:54,182 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:51:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:54,207 INFO L225 Difference]: With dead ends: 26817 [2020-12-22 09:51:54,207 INFO L226 Difference]: Without dead ends: 19363 [2020-12-22 09:51:54,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:51:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19363 states. [2020-12-22 09:51:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19363 to 19247. [2020-12-22 09:51:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19247 states. [2020-12-22 09:51:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19247 states to 19247 states and 24227 transitions. [2020-12-22 09:51:56,467 INFO L78 Accepts]: Start accepts. Automaton has 19247 states and 24227 transitions. Word has length 135 [2020-12-22 09:51:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:56,467 INFO L481 AbstractCegarLoop]: Abstraction has 19247 states and 24227 transitions. [2020-12-22 09:51:56,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:51:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19247 states and 24227 transitions. [2020-12-22 09:51:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:51:56,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:56,472 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, 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 09:51:56,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 09:51:56,687 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:56,688 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:51:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:56,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393931269] [2020-12-22 09:51:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:57,137 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-12-22 09:51:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:57,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393931269] [2020-12-22 09:51:57,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361590673] [2020-12-22 09:51:57,301 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 09:51:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:57,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:51:57,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:57,857 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 09:51:58,469 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:51:58,551 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:58,978 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:59,503 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:52:00,336 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:52:01,612 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:52:02,792 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:52:04,215 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:52:05,128 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:52:05,566 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:52:06,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:52:14,281 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-22 09:52:27,987 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-22 09:52:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:28,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:28,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:52:28,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360688438] [2020-12-22 09:52:28,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:52:28,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:52:28,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:52:28,584 INFO L87 Difference]: Start difference. First operand 19247 states and 24227 transitions. Second operand 22 states. [2020-12-22 09:52:29,037 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-12-22 09:52:29,892 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-12-22 09:52:30,556 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-22 09:52:31,270 WARN L197 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2020-12-22 09:52:32,510 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98