/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.5.1.ufo.UNBOUNDED.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:52:37,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:52:37,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:52:37,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:52:37,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:52:37,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:52:37,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:52:37,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:52:37,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:52:37,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:52:37,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:52:37,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:52:37,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:52:37,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:52:37,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:52:37,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:52:37,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:52:37,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:52:37,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:52:37,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:52:37,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:52:37,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:52:37,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:52:37,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:52:37,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:52:37,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:52:37,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:52:37,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:52:37,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:52:37,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:52:37,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:52:37,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:52:37,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:52:37,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:52:37,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:52:37,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:52:37,318 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:52:37,365 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:52:37,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:52:37,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:52:37,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:52:37,368 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:52:37,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:52:37,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:52:37,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:52:37,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:52:37,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:52:37,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:52:37,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:52:37,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:52:37,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:52:37,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:52:37,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:52:37,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:52:37,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:52:37,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:52:37,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:52:37,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:52:37,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:52:37,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:52:37,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:52:37,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:52:37,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:52:37,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:52:37,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:52:37,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:52:37,762 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:52:37,763 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:52:37,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:52:37,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50fac18cf/1fb8165868384a7e80c405c9c80cddcf/FLAG75fdcfbab [2020-12-22 09:52:39,008 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:52:39,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:52:39,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50fac18cf/1fb8165868384a7e80c405c9c80cddcf/FLAG75fdcfbab [2020-12-22 09:52:39,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50fac18cf/1fb8165868384a7e80c405c9c80cddcf [2020-12-22 09:52:39,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:52:39,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:52:39,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:39,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:52:39,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:52:39,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:39" (1/1) ... [2020-12-22 09:52:39,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769d2c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:39, skipping insertion in model container [2020-12-22 09:52:39,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:39" (1/1) ... [2020-12-22 09:52:39,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:52:39,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:52:39,970 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.5.1.ufo.UNBOUNDED.pals+Problem12_label04.c[11795,11808] [2020-12-22 09:52:40,060 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.5.1.ufo.UNBOUNDED.pals+Problem12_label04.c[18613,18626] [2020-12-22 09:52:41,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:52:41,061 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:52:41,133 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.5.1.ufo.UNBOUNDED.pals+Problem12_label04.c[11795,11808] [2020-12-22 09:52:41,204 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.5.1.ufo.UNBOUNDED.pals+Problem12_label04.c[18613,18626] [2020-12-22 09:52:41,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:52:41,916 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:52:41,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41 WrapperNode [2020-12-22 09:52:41,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:41,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:52:41,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:52:41,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:52:41,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (1/1) ... [2020-12-22 09:52:42,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (1/1) ... [2020-12-22 09:52:42,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:52:42,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:52:42,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:52:42,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:52:42,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (1/1) ... [2020-12-22 09:52:42,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (1/1) ... [2020-12-22 09:52:42,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (1/1) ... [2020-12-22 09:52:42,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (1/1) ... [2020-12-22 09:52:42,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (1/1) ... [2020-12-22 09:52:42,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (1/1) ... [2020-12-22 09:52:42,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (1/1) ... [2020-12-22 09:52:43,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:52:43,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:52:43,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:52:43,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:52:43,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (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 09:52:43,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:52:43,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:52:43,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:52:43,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:52:49,426 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:52:49,427 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:52:49,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:49 BoogieIcfgContainer [2020-12-22 09:52:49,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:52:49,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:52:49,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:52:49,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:52:49,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:52:39" (1/3) ... [2020-12-22 09:52:49,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e6412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:49, skipping insertion in model container [2020-12-22 09:52:49,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:41" (2/3) ... [2020-12-22 09:52:49,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e6412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:49, skipping insertion in model container [2020-12-22 09:52:49,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:49" (3/3) ... [2020-12-22 09:52:49,442 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:52:49,449 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:52:49,464 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:52:49,485 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:52:49,523 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:52:49,523 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:52:49,523 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:52:49,523 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:52:49,524 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:52:49,524 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:52:49,524 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:52:49,524 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:52:49,561 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:52:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:49,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:49,573 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] [2020-12-22 09:52:49,574 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:49,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2020-12-22 09:52:49,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:49,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933935796] [2020-12-22 09:52:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:49,872 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 09:52:49,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933935796] [2020-12-22 09:52:49,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:49,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:52:49,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711290687] [2020-12-22 09:52:49,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:52:49,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:49,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:52:49,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:52:49,906 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 2 states. [2020-12-22 09:52:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:50,006 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2020-12-22 09:52:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:52:50,008 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:52:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:50,037 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:52:50,038 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:52:50,053 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 09:52:50,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:52:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:52:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:52:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2020-12-22 09:52:50,205 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2020-12-22 09:52:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:50,206 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2020-12-22 09:52:50,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:52:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2020-12-22 09:52:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:50,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:50,210 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] [2020-12-22 09:52:50,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:52:50,214 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:50,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:52:50,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:50,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947417993] [2020-12-22 09:52:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:50,420 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 09:52:50,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947417993] [2020-12-22 09:52:50,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:50,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:50,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826102329] [2020-12-22 09:52:50,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:52:50,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:52:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:50,425 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand 5 states. [2020-12-22 09:52:50,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:50,594 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2020-12-22 09:52:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:52:50,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:52:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:50,602 INFO L225 Difference]: With dead ends: 901 [2020-12-22 09:52:50,603 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:52:50,605 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 09:52:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:52:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:52:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:52:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2020-12-22 09:52:50,638 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2020-12-22 09:52:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:50,638 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2020-12-22 09:52:50,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:52:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2020-12-22 09:52:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:52:50,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:50,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:50,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:52:50,642 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:50,643 INFO L82 PathProgramCache]: Analyzing trace with hash -918859349, now seen corresponding path program 1 times [2020-12-22 09:52:50,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:50,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312017567] [2020-12-22 09:52:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:50,929 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 09:52:50,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312017567] [2020-12-22 09:52:50,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:50,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:50,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084969775] [2020-12-22 09:52:50,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:52:50,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:50,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:52:50,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:52:50,950 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand 4 states. [2020-12-22 09:53:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:02,101 INFO L93 Difference]: Finished difference Result 3099 states and 5869 transitions. [2020-12-22 09:53:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:53:02,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 09:53:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:02,116 INFO L225 Difference]: With dead ends: 3099 [2020-12-22 09:53:02,116 INFO L226 Difference]: Without dead ends: 2346 [2020-12-22 09:53:02,118 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 09:53:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2020-12-22 09:53:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2346. [2020-12-22 09:53:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2346 states. [2020-12-22 09:53:02,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3536 transitions. [2020-12-22 09:53:02,179 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3536 transitions. Word has length 61 [2020-12-22 09:53:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:02,180 INFO L481 AbstractCegarLoop]: Abstraction has 2346 states and 3536 transitions. [2020-12-22 09:53:02,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:53:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3536 transitions. [2020-12-22 09:53:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:02,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:02,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:02,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:53:02,183 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:53:02,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:02,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694711094] [2020-12-22 09:53:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:02,265 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 09:53:02,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694711094] [2020-12-22 09:53:02,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:02,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:02,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406425797] [2020-12-22 09:53:02,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:02,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:02,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:02,268 INFO L87 Difference]: Start difference. First operand 2346 states and 3536 transitions. Second operand 3 states. [2020-12-22 09:53:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:02,314 INFO L93 Difference]: Finished difference Result 2446 states and 3694 transitions. [2020-12-22 09:53:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:02,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:02,327 INFO L225 Difference]: With dead ends: 2446 [2020-12-22 09:53:02,327 INFO L226 Difference]: Without dead ends: 2393 [2020-12-22 09:53:02,329 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 09:53:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2020-12-22 09:53:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2391. [2020-12-22 09:53:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2391 states. [2020-12-22 09:53:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3608 transitions. [2020-12-22 09:53:02,390 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3608 transitions. Word has length 64 [2020-12-22 09:53:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:02,391 INFO L481 AbstractCegarLoop]: Abstraction has 2391 states and 3608 transitions. [2020-12-22 09:53:02,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3608 transitions. [2020-12-22 09:53:02,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:02,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:02,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:02,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:53:02,393 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:02,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:02,394 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:53:02,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:02,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625068152] [2020-12-22 09:53:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:02,587 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 09:53:02,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625068152] [2020-12-22 09:53:02,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:02,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:02,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262297893] [2020-12-22 09:53:02,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:02,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:02,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:02,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:02,590 INFO L87 Difference]: Start difference. First operand 2391 states and 3608 transitions. Second operand 7 states. [2020-12-22 09:53:02,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:02,883 INFO L93 Difference]: Finished difference Result 3371 states and 5168 transitions. [2020-12-22 09:53:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:53:02,883 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:53:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:02,902 INFO L225 Difference]: With dead ends: 3371 [2020-12-22 09:53:02,902 INFO L226 Difference]: Without dead ends: 3273 [2020-12-22 09:53:02,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:53:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2020-12-22 09:53:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2487. [2020-12-22 09:53:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2487 states. [2020-12-22 09:53:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3759 transitions. [2020-12-22 09:53:02,990 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3759 transitions. Word has length 64 [2020-12-22 09:53:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:02,992 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 3759 transitions. [2020-12-22 09:53:02,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3759 transitions. [2020-12-22 09:53:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:02,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:02,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:02,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:53:02,994 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:02,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:53:02,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:02,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666557142] [2020-12-22 09:53:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:03,111 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 09:53:03,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666557142] [2020-12-22 09:53:03,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:03,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:03,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257200110] [2020-12-22 09:53:03,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:03,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:03,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:03,114 INFO L87 Difference]: Start difference. First operand 2487 states and 3759 transitions. Second operand 3 states. [2020-12-22 09:53:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:03,178 INFO L93 Difference]: Finished difference Result 2853 states and 4335 transitions. [2020-12-22 09:53:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:03,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:03,191 INFO L225 Difference]: With dead ends: 2853 [2020-12-22 09:53:03,192 INFO L226 Difference]: Without dead ends: 2659 [2020-12-22 09:53:03,193 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 09:53:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2020-12-22 09:53:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2653. [2020-12-22 09:53:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2653 states. [2020-12-22 09:53:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4013 transitions. [2020-12-22 09:53:03,267 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4013 transitions. Word has length 66 [2020-12-22 09:53:03,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:03,267 INFO L481 AbstractCegarLoop]: Abstraction has 2653 states and 4013 transitions. [2020-12-22 09:53:03,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4013 transitions. [2020-12-22 09:53:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:03,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:03,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:03,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:53:03,271 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:03,274 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:53:03,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:03,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17046727] [2020-12-22 09:53:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:03,531 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 09:53:03,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17046727] [2020-12-22 09:53:03,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:03,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:03,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77922351] [2020-12-22 09:53:03,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:03,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:03,534 INFO L87 Difference]: Start difference. First operand 2653 states and 4013 transitions. Second operand 7 states. [2020-12-22 09:53:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:03,810 INFO L93 Difference]: Finished difference Result 3015 states and 4575 transitions. [2020-12-22 09:53:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:03,811 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:53:03,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:03,824 INFO L225 Difference]: With dead ends: 3015 [2020-12-22 09:53:03,824 INFO L226 Difference]: Without dead ends: 2655 [2020-12-22 09:53:03,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:53:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2020-12-22 09:53:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2653. [2020-12-22 09:53:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2653 states. [2020-12-22 09:53:03,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4009 transitions. [2020-12-22 09:53:03,971 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4009 transitions. Word has length 66 [2020-12-22 09:53:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:03,973 INFO L481 AbstractCegarLoop]: Abstraction has 2653 states and 4009 transitions. [2020-12-22 09:53:03,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4009 transitions. [2020-12-22 09:53:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:03,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:03,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:03,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:53:03,975 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:53:03,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:03,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329143399] [2020-12-22 09:53:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:04,045 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 09:53:04,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329143399] [2020-12-22 09:53:04,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:04,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:04,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486124179] [2020-12-22 09:53:04,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:04,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:04,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:04,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:04,048 INFO L87 Difference]: Start difference. First operand 2653 states and 4009 transitions. Second operand 3 states. [2020-12-22 09:53:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:04,135 INFO L93 Difference]: Finished difference Result 3325 states and 5043 transitions. [2020-12-22 09:53:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:04,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:04,151 INFO L225 Difference]: With dead ends: 3325 [2020-12-22 09:53:04,152 INFO L226 Difference]: Without dead ends: 2965 [2020-12-22 09:53:04,154 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 09:53:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-12-22 09:53:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2020-12-22 09:53:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-12-22 09:53:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4477 transitions. [2020-12-22 09:53:04,287 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4477 transitions. Word has length 66 [2020-12-22 09:53:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:04,288 INFO L481 AbstractCegarLoop]: Abstraction has 2963 states and 4477 transitions. [2020-12-22 09:53:04,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4477 transitions. [2020-12-22 09:53:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:04,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:04,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:04,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:53:04,290 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:04,291 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:53:04,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:04,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295298705] [2020-12-22 09:53:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:04,376 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 09:53:04,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295298705] [2020-12-22 09:53:04,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:04,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:04,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106707613] [2020-12-22 09:53:04,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:04,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:04,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:04,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:04,381 INFO L87 Difference]: Start difference. First operand 2963 states and 4477 transitions. Second operand 3 states. [2020-12-22 09:53:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:04,510 INFO L93 Difference]: Finished difference Result 4207 states and 6367 transitions. [2020-12-22 09:53:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:04,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:04,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:04,532 INFO L225 Difference]: With dead ends: 4207 [2020-12-22 09:53:04,533 INFO L226 Difference]: Without dead ends: 3537 [2020-12-22 09:53:04,535 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 09:53:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2020-12-22 09:53:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3535. [2020-12-22 09:53:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3535 states. [2020-12-22 09:53:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 5325 transitions. [2020-12-22 09:53:04,702 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 5325 transitions. Word has length 66 [2020-12-22 09:53:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:04,703 INFO L481 AbstractCegarLoop]: Abstraction has 3535 states and 5325 transitions. [2020-12-22 09:53:04,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 5325 transitions. [2020-12-22 09:53:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:04,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:04,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:04,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:53:04,705 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:53:04,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:04,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067120764] [2020-12-22 09:53:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:04,772 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 09:53:04,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067120764] [2020-12-22 09:53:04,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:04,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:04,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184064469] [2020-12-22 09:53:04,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:04,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:04,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:04,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:04,779 INFO L87 Difference]: Start difference. First operand 3535 states and 5325 transitions. Second operand 3 states. [2020-12-22 09:53:05,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:05,003 INFO L93 Difference]: Finished difference Result 5827 states and 8751 transitions. [2020-12-22 09:53:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:05,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:05,042 INFO L225 Difference]: With dead ends: 5827 [2020-12-22 09:53:05,043 INFO L226 Difference]: Without dead ends: 4585 [2020-12-22 09:53:05,051 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 09:53:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4585 states. [2020-12-22 09:53:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4585 to 4583. [2020-12-22 09:53:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4583 states. [2020-12-22 09:53:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 6845 transitions. [2020-12-22 09:53:05,313 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 6845 transitions. Word has length 66 [2020-12-22 09:53:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:05,314 INFO L481 AbstractCegarLoop]: Abstraction has 4583 states and 6845 transitions. [2020-12-22 09:53:05,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 6845 transitions. [2020-12-22 09:53:05,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:53:05,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:05,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:05,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:53:05,316 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:05,316 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:53:05,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:05,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982527248] [2020-12-22 09:53:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:05,426 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 09:53:05,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982527248] [2020-12-22 09:53:05,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:05,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:05,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024357676] [2020-12-22 09:53:05,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:53:05,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:05,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:53:05,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:53:05,431 INFO L87 Difference]: Start difference. First operand 4583 states and 6845 transitions. Second operand 5 states. [2020-12-22 09:53:05,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:05,892 INFO L93 Difference]: Finished difference Result 6309 states and 9347 transitions. [2020-12-22 09:53:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:05,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:53:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:05,911 INFO L225 Difference]: With dead ends: 6309 [2020-12-22 09:53:05,911 INFO L226 Difference]: Without dead ends: 6307 [2020-12-22 09:53:05,915 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 09:53:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2020-12-22 09:53:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 4679. [2020-12-22 09:53:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4679 states. [2020-12-22 09:53:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 6925 transitions. [2020-12-22 09:53:06,187 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 6925 transitions. Word has length 67 [2020-12-22 09:53:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:06,187 INFO L481 AbstractCegarLoop]: Abstraction has 4679 states and 6925 transitions. [2020-12-22 09:53:06,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:53:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 6925 transitions. [2020-12-22 09:53:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:53:06,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:06,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:06,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:53:06,189 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:06,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:53:06,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:06,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400179045] [2020-12-22 09:53:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:06,238 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 09:53:06,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400179045] [2020-12-22 09:53:06,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:06,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:06,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126985426] [2020-12-22 09:53:06,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:06,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:06,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:06,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:06,240 INFO L87 Difference]: Start difference. First operand 4679 states and 6925 transitions. Second operand 3 states. [2020-12-22 09:53:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:06,530 INFO L93 Difference]: Finished difference Result 7118 states and 10515 transitions. [2020-12-22 09:53:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:06,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:53:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:06,544 INFO L225 Difference]: With dead ends: 7118 [2020-12-22 09:53:06,545 INFO L226 Difference]: Without dead ends: 5771 [2020-12-22 09:53:06,550 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 09:53:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2020-12-22 09:53:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5769. [2020-12-22 09:53:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:53:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8479 transitions. [2020-12-22 09:53:06,948 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8479 transitions. Word has length 68 [2020-12-22 09:53:06,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:06,948 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8479 transitions. [2020-12-22 09:53:06,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:06,948 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8479 transitions. [2020-12-22 09:53:06,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:06,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:06,953 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:06,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:53:06,953 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:06,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:53:06,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:06,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58267695] [2020-12-22 09:53:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:53:07,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58267695] [2020-12-22 09:53:07,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:07,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:07,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126090134] [2020-12-22 09:53:07,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:07,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:07,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:07,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:07,103 INFO L87 Difference]: Start difference. First operand 5769 states and 8479 transitions. Second operand 7 states. [2020-12-22 09:53:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:08,543 INFO L93 Difference]: Finished difference Result 23845 states and 34581 transitions. [2020-12-22 09:53:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:08,543 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:08,590 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:53:08,591 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:53:08,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:08,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:53:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:53:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:53:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13455 transitions. [2020-12-22 09:53:09,422 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13455 transitions. Word has length 94 [2020-12-22 09:53:09,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:09,423 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13455 transitions. [2020-12-22 09:53:09,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:09,423 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13455 transitions. [2020-12-22 09:53:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:09,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:09,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:09,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:53:09,427 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:09,428 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:53:09,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:09,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171100307] [2020-12-22 09:53:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:53:09,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171100307] [2020-12-22 09:53:09,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:09,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:09,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590804499] [2020-12-22 09:53:09,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:09,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:09,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:09,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:09,553 INFO L87 Difference]: Start difference. First operand 9241 states and 13455 transitions. Second operand 7 states. [2020-12-22 09:53:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:11,252 INFO L93 Difference]: Finished difference Result 27317 states and 39557 transitions. [2020-12-22 09:53:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:11,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:11,306 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:53:11,306 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:53:11,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:53:12,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:53:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:53:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20879 transitions. [2020-12-22 09:53:12,526 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20879 transitions. Word has length 94 [2020-12-22 09:53:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:12,526 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 20879 transitions. [2020-12-22 09:53:12,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20879 transitions. [2020-12-22 09:53:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:12,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:12,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:12,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:53:12,531 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:12,532 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:53:12,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:12,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106030848] [2020-12-22 09:53:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:53:12,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106030848] [2020-12-22 09:53:12,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:12,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:12,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079168180] [2020-12-22 09:53:12,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:12,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:12,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:12,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:12,695 INFO L87 Difference]: Start difference. First operand 14457 states and 20879 transitions. Second operand 7 states. [2020-12-22 09:53:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:14,143 INFO L93 Difference]: Finished difference Result 30789 states and 44533 transitions. [2020-12-22 09:53:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:14,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:14,210 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:53:14,210 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:53:14,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:53:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:53:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:53:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25855 transitions. [2020-12-22 09:53:15,332 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25855 transitions. Word has length 94 [2020-12-22 09:53:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:15,333 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25855 transitions. [2020-12-22 09:53:15,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:15,333 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25855 transitions. [2020-12-22 09:53:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:15,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:15,346 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:15,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:53:15,346 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:15,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:53:15,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:15,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028923999] [2020-12-22 09:53:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:53:15,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028923999] [2020-12-22 09:53:15,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:15,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:15,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341015310] [2020-12-22 09:53:15,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:15,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:15,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:15,632 INFO L87 Difference]: Start difference. First operand 17929 states and 25855 transitions. Second operand 7 states. [2020-12-22 09:53:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:17,199 INFO L93 Difference]: Finished difference Result 34261 states and 49509 transitions. [2020-12-22 09:53:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:17,199 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:17,276 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:53:17,277 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:53:17,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:53:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:53:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:53:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30831 transitions. [2020-12-22 09:53:18,660 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30831 transitions. Word has length 94 [2020-12-22 09:53:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:18,661 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30831 transitions. [2020-12-22 09:53:18,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30831 transitions. [2020-12-22 09:53:18,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:53:18,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:18,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:18,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:53:18,669 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:18,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:53:18,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:18,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24209330] [2020-12-22 09:53:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:18,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24209330] [2020-12-22 09:53:18,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:18,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:18,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834536351] [2020-12-22 09:53:18,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:18,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:18,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:18,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:18,749 INFO L87 Difference]: Start difference. First operand 21401 states and 30831 transitions. Second operand 3 states. [2020-12-22 09:53:19,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:19,560 INFO L93 Difference]: Finished difference Result 34810 states and 50228 transitions. [2020-12-22 09:53:19,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:19,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:53:19,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:19,593 INFO L225 Difference]: With dead ends: 34810 [2020-12-22 09:53:19,593 INFO L226 Difference]: Without dead ends: 15704 [2020-12-22 09:53:19,619 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 09:53:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2020-12-22 09:53:20,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 15702. [2020-12-22 09:53:20,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15702 states. [2020-12-22 09:53:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 22673 transitions. [2020-12-22 09:53:20,546 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 22673 transitions. Word has length 96 [2020-12-22 09:53:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:20,546 INFO L481 AbstractCegarLoop]: Abstraction has 15702 states and 22673 transitions. [2020-12-22 09:53:20,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 22673 transitions. [2020-12-22 09:53:20,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:53:20,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:20,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:20,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:53:20,551 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:20,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:53:20,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:20,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071774273] [2020-12-22 09:53:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:53:20,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071774273] [2020-12-22 09:53:20,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:20,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:20,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270280087] [2020-12-22 09:53:20,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:20,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:20,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:20,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:20,684 INFO L87 Difference]: Start difference. First operand 15702 states and 22673 transitions. Second operand 7 states. [2020-12-22 09:53:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:22,308 INFO L93 Difference]: Finished difference Result 27874 states and 40279 transitions. [2020-12-22 09:53:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:22,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:53:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:22,350 INFO L225 Difference]: With dead ends: 27874 [2020-12-22 09:53:22,351 INFO L226 Difference]: Without dead ends: 25440 [2020-12-22 09:53:22,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25440 states. [2020-12-22 09:53:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25440 to 18134. [2020-12-22 09:53:23,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18134 states. [2020-12-22 09:53:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18134 states to 18134 states and 26161 transitions. [2020-12-22 09:53:23,540 INFO L78 Accepts]: Start accepts. Automaton has 18134 states and 26161 transitions. Word has length 96 [2020-12-22 09:53:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:23,541 INFO L481 AbstractCegarLoop]: Abstraction has 18134 states and 26161 transitions. [2020-12-22 09:53:23,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 18134 states and 26161 transitions. [2020-12-22 09:53:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:23,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:23,547 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:23,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:53:23,547 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:53:23,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:23,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738902500] [2020-12-22 09:53:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:23,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738902500] [2020-12-22 09:53:23,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:23,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:23,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678818454] [2020-12-22 09:53:23,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:23,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:23,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:23,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:23,616 INFO L87 Difference]: Start difference. First operand 18134 states and 26161 transitions. Second operand 3 states. [2020-12-22 09:53:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:24,163 INFO L93 Difference]: Finished difference Result 26042 states and 37499 transitions. [2020-12-22 09:53:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:24,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:53:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:24,177 INFO L225 Difference]: With dead ends: 26042 [2020-12-22 09:53:24,177 INFO L226 Difference]: Without dead ends: 10232 [2020-12-22 09:53:24,196 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 09:53:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2020-12-22 09:53:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 10230. [2020-12-22 09:53:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10230 states. [2020-12-22 09:53:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10230 states to 10230 states and 14721 transitions. [2020-12-22 09:53:24,962 INFO L78 Accepts]: Start accepts. Automaton has 10230 states and 14721 transitions. Word has length 97 [2020-12-22 09:53:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:24,963 INFO L481 AbstractCegarLoop]: Abstraction has 10230 states and 14721 transitions. [2020-12-22 09:53:24,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 10230 states and 14721 transitions. [2020-12-22 09:53:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:24,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:24,967 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:53:24,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:53:24,967 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:24,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:24,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:53:24,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:24,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231205910] [2020-12-22 09:53:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:25,040 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 09:53:25,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231205910] [2020-12-22 09:53:25,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:25,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:25,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821648881] [2020-12-22 09:53:25,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:25,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:25,043 INFO L87 Difference]: Start difference. First operand 10230 states and 14721 transitions. Second operand 3 states. [2020-12-22 09:53:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:25,355 INFO L93 Difference]: Finished difference Result 14186 states and 20339 transitions. [2020-12-22 09:53:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:25,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:53:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:25,364 INFO L225 Difference]: With dead ends: 14186 [2020-12-22 09:53:25,364 INFO L226 Difference]: Without dead ends: 6280 [2020-12-22 09:53:25,372 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 09:53:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2020-12-22 09:53:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6278. [2020-12-22 09:53:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:53:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9053 transitions. [2020-12-22 09:53:25,629 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9053 transitions. Word has length 97 [2020-12-22 09:53:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:25,629 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 9053 transitions. [2020-12-22 09:53:25,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9053 transitions. [2020-12-22 09:53:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:25,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:25,631 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:25,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:53:25,632 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:53:25,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:25,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970902929] [2020-12-22 09:53:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:25,706 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 09:53:25,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970902929] [2020-12-22 09:53:25,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:25,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:25,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447388647] [2020-12-22 09:53:25,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:25,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:25,708 INFO L87 Difference]: Start difference. First operand 6278 states and 9053 transitions. Second operand 3 states. [2020-12-22 09:53:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:25,931 INFO L93 Difference]: Finished difference Result 8258 states and 11837 transitions. [2020-12-22 09:53:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:25,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:53:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:25,938 INFO L225 Difference]: With dead ends: 8258 [2020-12-22 09:53:25,939 INFO L226 Difference]: Without dead ends: 4304 [2020-12-22 09:53:25,943 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 09:53:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2020-12-22 09:53:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4302. [2020-12-22 09:53:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2020-12-22 09:53:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6245 transitions. [2020-12-22 09:53:26,258 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6245 transitions. Word has length 97 [2020-12-22 09:53:26,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:26,259 INFO L481 AbstractCegarLoop]: Abstraction has 4302 states and 6245 transitions. [2020-12-22 09:53:26,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6245 transitions. [2020-12-22 09:53:26,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:26,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:26,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:26,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:53:26,262 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:26,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:53:26,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:26,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166183935] [2020-12-22 09:53:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:26,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166183935] [2020-12-22 09:53:26,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188691488] [2020-12-22 09:53:26,707 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 09:53:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:26,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:53:26,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:53:27,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:27,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:53:27,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930405441] [2020-12-22 09:53:27,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:53:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:53:27,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:53:27,362 INFO L87 Difference]: Start difference. First operand 4302 states and 6245 transitions. Second operand 16 states. [2020-12-22 09:53:29,621 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 09:53:31,137 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:53:31,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:31,772 INFO L93 Difference]: Finished difference Result 15373 states and 21264 transitions. [2020-12-22 09:53:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:53:31,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:53:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:31,823 INFO L225 Difference]: With dead ends: 15373 [2020-12-22 09:53:31,823 INFO L226 Difference]: Without dead ends: 13395 [2020-12-22 09:53:31,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:53:31,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13395 states. [2020-12-22 09:53:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13395 to 10024. [2020-12-22 09:53:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10024 states. [2020-12-22 09:53:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 13807 transitions. [2020-12-22 09:53:32,977 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 13807 transitions. Word has length 97 [2020-12-22 09:53:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:32,977 INFO L481 AbstractCegarLoop]: Abstraction has 10024 states and 13807 transitions. [2020-12-22 09:53:32,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:53:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 13807 transitions. [2020-12-22 09:53:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:53:32,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:32,980 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:33,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:53:33,192 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:33,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:53:33,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:33,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295401094] [2020-12-22 09:53:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:33,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295401094] [2020-12-22 09:53:33,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453490927] [2020-12-22 09:53:33,619 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 09:53:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:33,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:33,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:34,065 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:34,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:34,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:53:34,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262700669] [2020-12-22 09:53:34,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:53:34,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:34,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:53:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:53:34,509 INFO L87 Difference]: Start difference. First operand 10024 states and 13807 transitions. Second operand 22 states. [2020-12-22 09:53:34,646 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-12-22 09:53:36,979 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:53:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:39,787 INFO L93 Difference]: Finished difference Result 40825 states and 54873 transitions. [2020-12-22 09:53:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:53:39,788 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:53:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:39,838 INFO L225 Difference]: With dead ends: 40825 [2020-12-22 09:53:39,838 INFO L226 Difference]: Without dead ends: 34322 [2020-12-22 09:53:39,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:53:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34322 states. [2020-12-22 09:53:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34322 to 22527. [2020-12-22 09:53:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22527 states. [2020-12-22 09:53:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22527 states to 22527 states and 30346 transitions. [2020-12-22 09:53:42,196 INFO L78 Accepts]: Start accepts. Automaton has 22527 states and 30346 transitions. Word has length 98 [2020-12-22 09:53:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:42,196 INFO L481 AbstractCegarLoop]: Abstraction has 22527 states and 30346 transitions. [2020-12-22 09:53:42,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:53:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 22527 states and 30346 transitions. [2020-12-22 09:53:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:53:42,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:42,199 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:42,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:53:42,410 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:53:42,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:42,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266822615] [2020-12-22 09:53:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:42,733 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 09:53:42,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266822615] [2020-12-22 09:53:42,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544885605] [2020-12-22 09:53:42,734 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 09:53:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:42,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:42,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:43,053 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:43,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:43,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:53:43,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525707912] [2020-12-22 09:53:43,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:53:43,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:43,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:53:43,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:53:43,397 INFO L87 Difference]: Start difference. First operand 22527 states and 30346 transitions. Second operand 17 states. [2020-12-22 09:53:46,307 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:47,471 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:51,891 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:08,499 INFO L93 Difference]: Finished difference Result 194506 states and 257832 transitions. [2020-12-22 09:54:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:54:08,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:54:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:08,977 INFO L225 Difference]: With dead ends: 194506 [2020-12-22 09:54:08,977 INFO L226 Difference]: Without dead ends: 174949 [2020-12-22 09:54:09,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:54:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174949 states. [2020-12-22 09:54:22,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174949 to 112800. [2020-12-22 09:54:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112800 states. [2020-12-22 09:54:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112800 states to 112800 states and 147729 transitions. [2020-12-22 09:54:22,324 INFO L78 Accepts]: Start accepts. Automaton has 112800 states and 147729 transitions. Word has length 98 [2020-12-22 09:54:22,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:22,324 INFO L481 AbstractCegarLoop]: Abstraction has 112800 states and 147729 transitions. [2020-12-22 09:54:22,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:54:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 112800 states and 147729 transitions. [2020-12-22 09:54:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:54:22,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:22,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:22,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:54:22,529 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:22,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:54:22,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:22,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253233] [2020-12-22 09:54:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:54:22,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253233] [2020-12-22 09:54:22,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:22,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:22,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423534202] [2020-12-22 09:54:22,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:22,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:22,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:22,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:22,649 INFO L87 Difference]: Start difference. First operand 112800 states and 147729 transitions. Second operand 6 states. [2020-12-22 09:54:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:29,645 INFO L93 Difference]: Finished difference Result 169219 states and 222288 transitions. [2020-12-22 09:54:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:29,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:54:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:29,726 INFO L225 Difference]: With dead ends: 169219 [2020-12-22 09:54:29,726 INFO L226 Difference]: Without dead ends: 58915 [2020-12-22 09:54:29,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:54:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58915 states. [2020-12-22 09:54:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58915 to 58915. [2020-12-22 09:54:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58915 states. [2020-12-22 09:54:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58915 states to 58915 states and 77394 transitions. [2020-12-22 09:54:36,308 INFO L78 Accepts]: Start accepts. Automaton has 58915 states and 77394 transitions. Word has length 98 [2020-12-22 09:54:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:36,309 INFO L481 AbstractCegarLoop]: Abstraction has 58915 states and 77394 transitions. [2020-12-22 09:54:36,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:54:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 58915 states and 77394 transitions. [2020-12-22 09:54:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:54:36,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:36,311 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:36,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:54:36,312 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:36,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:36,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:54:36,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:36,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761631975] [2020-12-22 09:54:36,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:54:36,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761631975] [2020-12-22 09:54:36,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:36,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:36,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296867503] [2020-12-22 09:54:36,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:36,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:36,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:36,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:36,401 INFO L87 Difference]: Start difference. First operand 58915 states and 77394 transitions. Second operand 6 states. [2020-12-22 09:54:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:41,544 INFO L93 Difference]: Finished difference Result 100581 states and 131837 transitions. [2020-12-22 09:54:41,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:41,545 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:54:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:41,589 INFO L225 Difference]: With dead ends: 100581 [2020-12-22 09:54:41,589 INFO L226 Difference]: Without dead ends: 44246 [2020-12-22 09:54:41,610 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 09:54:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44246 states. [2020-12-22 09:54:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44246 to 44246. [2020-12-22 09:54:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44246 states. [2020-12-22 09:54:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44246 states to 44246 states and 57439 transitions. [2020-12-22 09:54:46,473 INFO L78 Accepts]: Start accepts. Automaton has 44246 states and 57439 transitions. Word has length 98 [2020-12-22 09:54:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:46,474 INFO L481 AbstractCegarLoop]: Abstraction has 44246 states and 57439 transitions. [2020-12-22 09:54:46,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:54:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 44246 states and 57439 transitions. [2020-12-22 09:54:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:54:46,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:46,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:46,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:54:46,581 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 09:54:46,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:46,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288246115] [2020-12-22 09:54:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:54:46,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288246115] [2020-12-22 09:54:46,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:46,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:46,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315378144] [2020-12-22 09:54:46,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:46,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:46,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:46,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:46,660 INFO L87 Difference]: Start difference. First operand 44246 states and 57439 transitions. Second operand 6 states. [2020-12-22 09:54:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:54,679 INFO L93 Difference]: Finished difference Result 114022 states and 148138 transitions. [2020-12-22 09:54:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:54,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:54:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:54,763 INFO L225 Difference]: With dead ends: 114022 [2020-12-22 09:54:54,764 INFO L226 Difference]: Without dead ends: 72148 [2020-12-22 09:54:54,786 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 09:54:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72148 states. [2020-12-22 09:55:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72148 to 65074. [2020-12-22 09:55:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65074 states. [2020-12-22 09:55:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65074 states to 65074 states and 84260 transitions. [2020-12-22 09:55:02,206 INFO L78 Accepts]: Start accepts. Automaton has 65074 states and 84260 transitions. Word has length 98 [2020-12-22 09:55:02,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:02,207 INFO L481 AbstractCegarLoop]: Abstraction has 65074 states and 84260 transitions. [2020-12-22 09:55:02,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:02,207 INFO L276 IsEmpty]: Start isEmpty. Operand 65074 states and 84260 transitions. [2020-12-22 09:55:02,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:55:02,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:02,210 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:02,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:55:02,210 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:02,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:02,210 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 09:55:02,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:02,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624947423] [2020-12-22 09:55:02,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:55:02,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624947423] [2020-12-22 09:55:02,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:02,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:02,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696055759] [2020-12-22 09:55:02,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:55:02,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:02,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:55:02,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:55:02,295 INFO L87 Difference]: Start difference. First operand 65074 states and 84260 transitions. Second operand 6 states. [2020-12-22 09:55:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:08,464 INFO L93 Difference]: Finished difference Result 113520 states and 146729 transitions. [2020-12-22 09:55:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:55:08,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 09:55:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:08,531 INFO L225 Difference]: With dead ends: 113520 [2020-12-22 09:55:08,531 INFO L226 Difference]: Without dead ends: 50828 [2020-12-22 09:55:08,556 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 09:55:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50828 states. [2020-12-22 09:55:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50828 to 50828. [2020-12-22 09:55:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50828 states. [2020-12-22 09:55:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50828 states to 50828 states and 65315 transitions. [2020-12-22 09:55:14,600 INFO L78 Accepts]: Start accepts. Automaton has 50828 states and 65315 transitions. Word has length 99 [2020-12-22 09:55:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:14,600 INFO L481 AbstractCegarLoop]: Abstraction has 50828 states and 65315 transitions. [2020-12-22 09:55:14,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 50828 states and 65315 transitions. [2020-12-22 09:55:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 09:55:14,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:14,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:14,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 09:55:14,605 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 09:55:14,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:14,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198674631] [2020-12-22 09:55:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:14,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198674631] [2020-12-22 09:55:14,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749527276] [2020-12-22 09:55:14,925 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 09:55:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:15,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:55:15,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:55:15,493 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:55:15,863 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 09:55:16,488 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 09:55:16,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:55:16,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 09:55:16,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814315182] [2020-12-22 09:55:16,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 09:55:16,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:16,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 09:55:16,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 09:55:16,490 INFO L87 Difference]: Start difference. First operand 50828 states and 65315 transitions. Second operand 20 states. [2020-12-22 09:55:17,506 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 09:55:17,967 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 09:55:18,604 WARN L197 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 09:55:19,340 WARN L197 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 09:55:20,113 WARN L197 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:55:20,733 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:55:21,517 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:55:22,023 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 09:55:22,694 WARN L197 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:55:23,244 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 09:55:23,968 WARN L197 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:55:24,626 WARN L197 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:55:25,506 WARN L197 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:55:26,250 WARN L197 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:55:26,980 WARN L197 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:55:28,025 WARN L197 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:55:31,744 WARN L197 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:55:32,705 WARN L197 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 09:55:33,544 WARN L197 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:55:34,042 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:55:35,194 WARN L197 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:55:35,688 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:55:36,105 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:55:36,596 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:37,182 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:55:37,571 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:38,652 WARN L197 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 09:55:39,428 WARN L197 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:55:39,990 WARN L197 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 09:55:40,398 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:55:41,609 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:42,052 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:55:42,971 WARN L197 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:55:43,435 WARN L197 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:55:43,830 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:47,654 WARN L197 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 09:55:49,512 WARN L197 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 09:55:50,646 WARN L197 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:55:51,228 WARN L197 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:55:51,772 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:55:52,816 WARN L197 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 09:55:53,514 WARN L197 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:55:54,239 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:55:54,614 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 09:55:55,307 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:55:55,641 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:56:08,010 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-22 09:56:08,650 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:56:08,948 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:56:09,264 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:56:10,062 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:56:10,380 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:56:12,806 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:56:13,579 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:56:20,955 WARN L197 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-22 09:56:21,901 WARN L197 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 101