/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:44:25,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:44:25,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:44:26,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:44:26,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:44:26,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:44:26,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:44:26,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:44:26,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:44:26,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:44:26,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:44:26,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:44:26,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:44:26,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:44:26,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:44:26,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:44:26,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:44:26,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:44:26,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:44:26,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:44:26,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:44:26,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:44:26,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:44:26,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:44:26,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:44:26,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:44:26,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:44:26,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:44:26,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:44:26,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:44:26,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:44:26,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:44:26,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:44:26,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:44:26,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:44:26,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:44:26,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:44:26,162 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:44:26,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:44:26,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:44:26,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:44:26,169 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:44:26,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:44:26,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:44:26,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:44:26,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:44:26,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:44:26,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:44:26,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:44:26,172 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:44:26,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:44:26,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:44:26,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:44:26,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:44:26,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:44:26,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:44:26,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:44:26,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:44:26,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:44:26,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:44:26,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:44:26,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:44:26,175 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:44:26,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:44:26,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:44:26,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:44:26,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:44:26,693 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:44:26,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label01.c [2020-12-22 09:44:26,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ca85f988/84b2cf9a9ef34fdf8ca9b704ae222f15/FLAGbbc93edf9 [2020-12-22 09:44:27,944 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:44:27,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label01.c [2020-12-22 09:44:27,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ca85f988/84b2cf9a9ef34fdf8ca9b704ae222f15/FLAGbbc93edf9 [2020-12-22 09:44:28,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ca85f988/84b2cf9a9ef34fdf8ca9b704ae222f15 [2020-12-22 09:44:28,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:44:28,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:44:28,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:44:28,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:44:28,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:44:28,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:28,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@403de427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28, skipping insertion in model container [2020-12-22 09:44:28,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:28,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:44:28,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:44:28,933 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label01.c[8688,8701] [2020-12-22 09:44:28,994 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label01.c[14000,14013] [2020-12-22 09:44:30,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:44:30,226 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:44:30,337 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label01.c[8688,8701] [2020-12-22 09:44:30,365 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label01.c[14000,14013] [2020-12-22 09:44:31,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:44:31,101 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:44:31,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31 WrapperNode [2020-12-22 09:44:31,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:44:31,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:44:31,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:44:31,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:44:31,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (1/1) ... [2020-12-22 09:44:31,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (1/1) ... [2020-12-22 09:44:31,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:44:31,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:44:31,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:44:31,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:44:31,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (1/1) ... [2020-12-22 09:44:31,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (1/1) ... [2020-12-22 09:44:31,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (1/1) ... [2020-12-22 09:44:31,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (1/1) ... [2020-12-22 09:44:32,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (1/1) ... [2020-12-22 09:44:32,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (1/1) ... [2020-12-22 09:44:32,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (1/1) ... [2020-12-22 09:44:32,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:44:32,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:44:32,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:44:32,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:44:32,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (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 09:44:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:44:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:44:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:44:32,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:44:38,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:44:38,557 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:44:38,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:44:38 BoogieIcfgContainer [2020-12-22 09:44:38,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:44:38,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:44:38,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:44:38,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:44:38,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:44:28" (1/3) ... [2020-12-22 09:44:38,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab43751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:44:38, skipping insertion in model container [2020-12-22 09:44:38,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:31" (2/3) ... [2020-12-22 09:44:38,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab43751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:44:38, skipping insertion in model container [2020-12-22 09:44:38,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:44:38" (3/3) ... [2020-12-22 09:44:38,577 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label01.c [2020-12-22 09:44:38,586 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:44:38,594 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:44:38,617 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:44:38,672 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:44:38,673 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:44:38,673 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:44:38,673 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:44:38,673 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:44:38,674 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:44:38,674 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:44:38,674 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:44:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:44:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:44:38,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:38,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:38,739 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:38,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:44:38,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:38,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638368504] [2020-12-22 09:44:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:39,055 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 09:44:39,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638368504] [2020-12-22 09:44:39,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:39,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:44:39,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148244720] [2020-12-22 09:44:39,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:44:39,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:44:39,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:44:39,097 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 2 states. [2020-12-22 09:44:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:39,197 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2020-12-22 09:44:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:44:39,199 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:44:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:39,246 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:44:39,246 INFO L226 Difference]: Without dead ends: 827 [2020-12-22 09:44:39,260 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 09:44:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-12-22 09:44:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2020-12-22 09:44:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:44:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2020-12-22 09:44:39,419 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2020-12-22 09:44:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:39,421 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2020-12-22 09:44:39,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:44:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2020-12-22 09:44:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:44:39,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:39,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:39,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:44:39,427 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:44:39,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:39,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569187018] [2020-12-22 09:44:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:39,579 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 09:44:39,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569187018] [2020-12-22 09:44:39,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:39,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:39,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205007053] [2020-12-22 09:44:39,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:44:39,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:39,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:44:39,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:44:39,585 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand 5 states. [2020-12-22 09:44:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:39,784 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2020-12-22 09:44:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:39,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:44:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:39,790 INFO L225 Difference]: With dead ends: 919 [2020-12-22 09:44:39,791 INFO L226 Difference]: Without dead ends: 871 [2020-12-22 09:44:39,792 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 09:44:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-12-22 09:44:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2020-12-22 09:44:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:44:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2020-12-22 09:44:39,818 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2020-12-22 09:44:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:39,819 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2020-12-22 09:44:39,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:44:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2020-12-22 09:44:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:44:39,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:39,822 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] [2020-12-22 09:44:39,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:44:39,822 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1620709547, now seen corresponding path program 1 times [2020-12-22 09:44:39,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:39,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766964959] [2020-12-22 09:44:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:39,941 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 09:44:39,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766964959] [2020-12-22 09:44:39,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:39,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:44:39,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105443652] [2020-12-22 09:44:39,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:39,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:39,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:39,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:39,944 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand 3 states. [2020-12-22 09:44:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:46,597 INFO L93 Difference]: Finished difference Result 2331 states and 4410 transitions. [2020-12-22 09:44:46,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:46,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 09:44:46,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:46,611 INFO L225 Difference]: With dead ends: 2331 [2020-12-22 09:44:46,611 INFO L226 Difference]: Without dead ends: 1578 [2020-12-22 09:44:46,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2020-12-22 09:44:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2020-12-22 09:44:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:44:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2912 transitions. [2020-12-22 09:44:46,684 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2912 transitions. Word has length 48 [2020-12-22 09:44:46,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:46,685 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2912 transitions. [2020-12-22 09:44:46,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2912 transitions. [2020-12-22 09:44:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:46,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:46,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:46,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:44:46,694 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:46,694 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:44:46,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:46,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753318254] [2020-12-22 09:44:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:46,853 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 09:44:46,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753318254] [2020-12-22 09:44:46,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:46,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:46,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883573961] [2020-12-22 09:44:46,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:46,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:46,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:46,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:46,861 INFO L87 Difference]: Start difference. First operand 1578 states and 2912 transitions. Second operand 3 states. [2020-12-22 09:44:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:46,920 INFO L93 Difference]: Finished difference Result 1660 states and 3040 transitions. [2020-12-22 09:44:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:46,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:46,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:46,933 INFO L225 Difference]: With dead ends: 1660 [2020-12-22 09:44:46,933 INFO L226 Difference]: Without dead ends: 1616 [2020-12-22 09:44:46,935 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 09:44:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-12-22 09:44:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2020-12-22 09:44:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1614 states. [2020-12-22 09:44:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2969 transitions. [2020-12-22 09:44:47,004 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2969 transitions. Word has length 52 [2020-12-22 09:44:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:47,004 INFO L481 AbstractCegarLoop]: Abstraction has 1614 states and 2969 transitions. [2020-12-22 09:44:47,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2969 transitions. [2020-12-22 09:44:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:47,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:47,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:47,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:44:47,011 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:47,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:44:47,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:47,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819805025] [2020-12-22 09:44:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:47,099 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 09:44:47,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819805025] [2020-12-22 09:44:47,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:47,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:47,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178803070] [2020-12-22 09:44:47,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:47,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:47,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:47,102 INFO L87 Difference]: Start difference. First operand 1614 states and 2969 transitions. Second operand 3 states. [2020-12-22 09:44:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:47,152 INFO L93 Difference]: Finished difference Result 1762 states and 3201 transitions. [2020-12-22 09:44:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:47,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:47,165 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 09:44:47,166 INFO L226 Difference]: Without dead ends: 1682 [2020-12-22 09:44:47,168 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 09:44:47,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2020-12-22 09:44:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2020-12-22 09:44:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1680 states. [2020-12-22 09:44:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 3072 transitions. [2020-12-22 09:44:47,227 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 3072 transitions. Word has length 52 [2020-12-22 09:44:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:47,228 INFO L481 AbstractCegarLoop]: Abstraction has 1680 states and 3072 transitions. [2020-12-22 09:44:47,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 3072 transitions. [2020-12-22 09:44:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:47,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:47,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:47,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:44:47,230 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:47,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:47,231 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:44:47,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:47,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309384773] [2020-12-22 09:44:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:47,340 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 09:44:47,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309384773] [2020-12-22 09:44:47,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:47,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:47,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842520839] [2020-12-22 09:44:47,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:47,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:47,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:47,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:47,344 INFO L87 Difference]: Start difference. First operand 1680 states and 3072 transitions. Second operand 3 states. [2020-12-22 09:44:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:47,416 INFO L93 Difference]: Finished difference Result 1948 states and 3490 transitions. [2020-12-22 09:44:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:47,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:47,432 INFO L225 Difference]: With dead ends: 1948 [2020-12-22 09:44:47,432 INFO L226 Difference]: Without dead ends: 1802 [2020-12-22 09:44:47,434 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 09:44:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-12-22 09:44:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2020-12-22 09:44:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-12-22 09:44:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3256 transitions. [2020-12-22 09:44:47,510 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3256 transitions. Word has length 52 [2020-12-22 09:44:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:47,510 INFO L481 AbstractCegarLoop]: Abstraction has 1800 states and 3256 transitions. [2020-12-22 09:44:47,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3256 transitions. [2020-12-22 09:44:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:47,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:47,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:47,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:44:47,514 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:47,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:47,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:44:47,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:47,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280582939] [2020-12-22 09:44:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:47,660 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 09:44:47,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280582939] [2020-12-22 09:44:47,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:47,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:47,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987747552] [2020-12-22 09:44:47,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:47,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:47,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:47,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:47,663 INFO L87 Difference]: Start difference. First operand 1800 states and 3256 transitions. Second operand 3 states. [2020-12-22 09:44:47,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:47,733 INFO L93 Difference]: Finished difference Result 2284 states and 4002 transitions. [2020-12-22 09:44:47,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:47,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:47,749 INFO L225 Difference]: With dead ends: 2284 [2020-12-22 09:44:47,749 INFO L226 Difference]: Without dead ends: 2018 [2020-12-22 09:44:47,751 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 09:44:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2020-12-22 09:44:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2020-12-22 09:44:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2016 states. [2020-12-22 09:44:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3580 transitions. [2020-12-22 09:44:47,825 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3580 transitions. Word has length 52 [2020-12-22 09:44:47,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:47,825 INFO L481 AbstractCegarLoop]: Abstraction has 2016 states and 3580 transitions. [2020-12-22 09:44:47,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:47,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3580 transitions. [2020-12-22 09:44:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:47,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:47,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:47,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:44:47,827 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:47,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:44:47,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:47,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149542243] [2020-12-22 09:44:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:47,926 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 09:44:47,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149542243] [2020-12-22 09:44:47,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:47,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:47,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249230656] [2020-12-22 09:44:47,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:47,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:47,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:47,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:47,931 INFO L87 Difference]: Start difference. First operand 2016 states and 3580 transitions. Second operand 6 states. [2020-12-22 09:44:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:48,317 INFO L93 Difference]: Finished difference Result 5872 states and 9476 transitions. [2020-12-22 09:44:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:44:48,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:44:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:48,365 INFO L225 Difference]: With dead ends: 5872 [2020-12-22 09:44:48,365 INFO L226 Difference]: Without dead ends: 5390 [2020-12-22 09:44:48,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:44:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2020-12-22 09:44:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2020-12-22 09:44:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2496 states. [2020-12-22 09:44:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 4284 transitions. [2020-12-22 09:44:48,558 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 4284 transitions. Word has length 52 [2020-12-22 09:44:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:48,562 INFO L481 AbstractCegarLoop]: Abstraction has 2496 states and 4284 transitions. [2020-12-22 09:44:48,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 4284 transitions. [2020-12-22 09:44:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:44:48,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:48,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:48,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:44:48,564 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:48,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:44:48,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:48,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721946777] [2020-12-22 09:44:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:48,688 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 09:44:48,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721946777] [2020-12-22 09:44:48,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:48,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:48,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961724478] [2020-12-22 09:44:48,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:48,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:48,695 INFO L87 Difference]: Start difference. First operand 2496 states and 4284 transitions. Second operand 3 states. [2020-12-22 09:44:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:48,819 INFO L93 Difference]: Finished difference Result 3902 states and 6384 transitions. [2020-12-22 09:44:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:48,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:44:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:48,840 INFO L225 Difference]: With dead ends: 3902 [2020-12-22 09:44:48,840 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:44:48,844 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 09:44:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:44:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:44:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:44:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4918 transitions. [2020-12-22 09:44:49,029 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4918 transitions. Word has length 54 [2020-12-22 09:44:49,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:49,030 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4918 transitions. [2020-12-22 09:44:49,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:49,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4918 transitions. [2020-12-22 09:44:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:44:49,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:49,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:49,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:44:49,032 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:49,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:44:49,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:49,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720116511] [2020-12-22 09:44:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:49,273 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 09:44:49,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720116511] [2020-12-22 09:44:49,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:49,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:49,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427583213] [2020-12-22 09:44:49,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:49,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:49,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:49,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:49,280 INFO L87 Difference]: Start difference. First operand 2938 states and 4918 transitions. Second operand 6 states. [2020-12-22 09:44:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:49,588 INFO L93 Difference]: Finished difference Result 4342 states and 6992 transitions. [2020-12-22 09:44:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:49,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:44:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:49,609 INFO L225 Difference]: With dead ends: 4342 [2020-12-22 09:44:49,609 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:44:49,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:44:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:44:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:44:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:44:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4894 transitions. [2020-12-22 09:44:49,883 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4894 transitions. Word has length 54 [2020-12-22 09:44:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:49,883 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4894 transitions. [2020-12-22 09:44:49,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:49,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4894 transitions. [2020-12-22 09:44:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:44:49,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:49,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:49,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:44:49,885 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:49,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:44:49,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:49,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33389706] [2020-12-22 09:44:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:49,994 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 09:44:49,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33389706] [2020-12-22 09:44:49,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:49,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:49,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885230112] [2020-12-22 09:44:49,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:49,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:49,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:49,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:49,999 INFO L87 Difference]: Start difference. First operand 2938 states and 4894 transitions. Second operand 6 states. [2020-12-22 09:44:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:50,250 INFO L93 Difference]: Finished difference Result 4340 states and 6943 transitions. [2020-12-22 09:44:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:50,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:44:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:50,289 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:44:50,289 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:44:50,298 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 09:44:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:44:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:44:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:44:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4870 transitions. [2020-12-22 09:44:50,464 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4870 transitions. Word has length 55 [2020-12-22 09:44:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:50,464 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4870 transitions. [2020-12-22 09:44:50,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4870 transitions. [2020-12-22 09:44:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:44:50,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:50,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:50,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:44:50,466 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:50,467 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:44:50,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:50,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430047083] [2020-12-22 09:44:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:50,559 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 09:44:50,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430047083] [2020-12-22 09:44:50,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:50,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:50,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884872649] [2020-12-22 09:44:50,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:50,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:50,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:50,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:50,562 INFO L87 Difference]: Start difference. First operand 2938 states and 4870 transitions. Second operand 6 states. [2020-12-22 09:44:50,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:50,850 INFO L93 Difference]: Finished difference Result 4340 states and 6895 transitions. [2020-12-22 09:44:50,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:50,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:44:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:50,862 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:44:50,862 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:44:50,866 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 09:44:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:44:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:44:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:44:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4846 transitions. [2020-12-22 09:44:51,043 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4846 transitions. Word has length 55 [2020-12-22 09:44:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:51,043 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4846 transitions. [2020-12-22 09:44:51,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4846 transitions. [2020-12-22 09:44:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:44:51,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:51,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:44:51,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:44:51,045 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:44:51,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:51,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355141258] [2020-12-22 09:44:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:51,131 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 09:44:51,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355141258] [2020-12-22 09:44:51,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:51,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:51,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810460214] [2020-12-22 09:44:51,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:44:51,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:51,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:44:51,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:44:51,134 INFO L87 Difference]: Start difference. First operand 2938 states and 4846 transitions. Second operand 5 states. [2020-12-22 09:44:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:51,466 INFO L93 Difference]: Finished difference Result 4169 states and 6544 transitions. [2020-12-22 09:44:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:44:51,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:44:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:51,480 INFO L225 Difference]: With dead ends: 4169 [2020-12-22 09:44:51,480 INFO L226 Difference]: Without dead ends: 4167 [2020-12-22 09:44:51,484 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 09:44:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2020-12-22 09:44:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2020-12-22 09:44:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:44:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4934 transitions. [2020-12-22 09:44:51,704 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4934 transitions. Word has length 55 [2020-12-22 09:44:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:51,704 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4934 transitions. [2020-12-22 09:44:51,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:44:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4934 transitions. [2020-12-22 09:44:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:44:51,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:51,708 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:51,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:44:51,709 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:51,710 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:44:51,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:51,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919025751] [2020-12-22 09:44:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:44:51,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919025751] [2020-12-22 09:44:51,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:51,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:51,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128033764] [2020-12-22 09:44:51,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:51,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:51,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:51,824 INFO L87 Difference]: Start difference. First operand 3034 states and 4934 transitions. Second operand 6 states. [2020-12-22 09:44:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:52,741 INFO L93 Difference]: Finished difference Result 9340 states and 13703 transitions. [2020-12-22 09:44:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:52,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:44:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:52,764 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:44:52,765 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:44:52,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:44:53,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:44:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:44:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6998 transitions. [2020-12-22 09:44:53,225 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6998 transitions. Word has length 79 [2020-12-22 09:44:53,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:53,225 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 6998 transitions. [2020-12-22 09:44:53,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6998 transitions. [2020-12-22 09:44:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:44:53,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:53,228 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:53,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:44:53,229 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:53,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:44:53,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:53,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443712320] [2020-12-22 09:44:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:44:53,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443712320] [2020-12-22 09:44:53,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:53,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:53,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025855269] [2020-12-22 09:44:53,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:53,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:53,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:53,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:53,367 INFO L87 Difference]: Start difference. First operand 4530 states and 6998 transitions. Second operand 6 states. [2020-12-22 09:44:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:54,175 INFO L93 Difference]: Finished difference Result 10836 states and 15767 transitions. [2020-12-22 09:44:54,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:54,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:44:54,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:54,205 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:44:54,205 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:44:54,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:44:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:44:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:44:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 10074 transitions. [2020-12-22 09:44:54,969 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 10074 transitions. Word has length 79 [2020-12-22 09:44:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:54,970 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 10074 transitions. [2020-12-22 09:44:54,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 10074 transitions. [2020-12-22 09:44:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:44:54,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:54,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:54,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:44:54,974 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:54,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:44:54,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:54,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684289243] [2020-12-22 09:44:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:44:55,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684289243] [2020-12-22 09:44:55,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:55,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:55,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542975066] [2020-12-22 09:44:55,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:55,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:55,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:55,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:55,092 INFO L87 Difference]: Start difference. First operand 6778 states and 10074 transitions. Second operand 6 states. [2020-12-22 09:44:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:56,004 INFO L93 Difference]: Finished difference Result 12332 states and 17831 transitions. [2020-12-22 09:44:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:56,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:44:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:56,034 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:44:56,035 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:44:56,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:44:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:44:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:44:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12138 transitions. [2020-12-22 09:44:56,877 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12138 transitions. Word has length 79 [2020-12-22 09:44:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:56,878 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12138 transitions. [2020-12-22 09:44:56,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12138 transitions. [2020-12-22 09:44:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:44:56,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:56,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:56,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:44:56,882 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:44:56,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:56,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614590241] [2020-12-22 09:44:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:44:56,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614590241] [2020-12-22 09:44:56,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:56,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:56,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146588556] [2020-12-22 09:44:56,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:56,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:56,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:56,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:56,997 INFO L87 Difference]: Start difference. First operand 8274 states and 12138 transitions. Second operand 6 states. [2020-12-22 09:44:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:57,809 INFO L93 Difference]: Finished difference Result 12948 states and 18695 transitions. [2020-12-22 09:44:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:57,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:44:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:57,837 INFO L225 Difference]: With dead ends: 12948 [2020-12-22 09:44:57,837 INFO L226 Difference]: Without dead ends: 11890 [2020-12-22 09:44:57,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2020-12-22 09:44:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2020-12-22 09:44:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9330 states. [2020-12-22 09:44:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13610 transitions. [2020-12-22 09:44:58,608 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13610 transitions. Word has length 79 [2020-12-22 09:44:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:58,608 INFO L481 AbstractCegarLoop]: Abstraction has 9330 states and 13610 transitions. [2020-12-22 09:44:58,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13610 transitions. [2020-12-22 09:44:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:44:58,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:58,614 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] [2020-12-22 09:44:58,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:44:58,615 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:58,615 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:44:58,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:58,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787220462] [2020-12-22 09:44:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:58,851 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 09:44:58,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787220462] [2020-12-22 09:44:58,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599420573] [2020-12-22 09:44:58,852 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 09:44:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:58,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:44:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:59,260 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:44:59,578 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 09:44:59,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:59,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:44:59,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799328713] [2020-12-22 09:44:59,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:44:59,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:59,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:44:59,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:44:59,581 INFO L87 Difference]: Start difference. First operand 9330 states and 13610 transitions. Second operand 18 states. [2020-12-22 09:45:01,794 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:02,934 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:03,545 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:04,942 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:45:05,235 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:06,574 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:06,723 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:09,102 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:09,708 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:09,881 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:10,361 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:10,776 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:45:11,033 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:11,209 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:45:11,953 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:45:13,421 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:14,061 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:14,191 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:14,544 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:18,631 INFO L93 Difference]: Finished difference Result 85950 states and 117705 transitions. [2020-12-22 09:45:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:45:18,632 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:45:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:18,825 INFO L225 Difference]: With dead ends: 85950 [2020-12-22 09:45:18,825 INFO L226 Difference]: Without dead ends: 78156 [2020-12-22 09:45:18,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:45:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78156 states. [2020-12-22 09:45:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78156 to 35946. [2020-12-22 09:45:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35946 states. [2020-12-22 09:45:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35946 states to 35946 states and 50128 transitions. [2020-12-22 09:45:22,703 INFO L78 Accepts]: Start accepts. Automaton has 35946 states and 50128 transitions. Word has length 80 [2020-12-22 09:45:22,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:22,704 INFO L481 AbstractCegarLoop]: Abstraction has 35946 states and 50128 transitions. [2020-12-22 09:45:22,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:45:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 35946 states and 50128 transitions. [2020-12-22 09:45:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:45:22,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:22,713 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:22,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:45:22,929 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:45:22,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:22,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922736452] [2020-12-22 09:45:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:23,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922736452] [2020-12-22 09:45:23,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:23,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:23,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739196906] [2020-12-22 09:45:23,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:23,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:23,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:23,007 INFO L87 Difference]: Start difference. First operand 35946 states and 50128 transitions. Second operand 3 states. [2020-12-22 09:45:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:25,783 INFO L93 Difference]: Finished difference Result 70358 states and 97412 transitions. [2020-12-22 09:45:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:25,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:45:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:25,855 INFO L225 Difference]: With dead ends: 70358 [2020-12-22 09:45:25,856 INFO L226 Difference]: Without dead ends: 35948 [2020-12-22 09:45:25,905 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 09:45:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35948 states. [2020-12-22 09:45:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35948 to 34986. [2020-12-22 09:45:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34986 states. [2020-12-22 09:45:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34986 states to 34986 states and 48088 transitions. [2020-12-22 09:45:29,449 INFO L78 Accepts]: Start accepts. Automaton has 34986 states and 48088 transitions. Word has length 81 [2020-12-22 09:45:29,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:29,449 INFO L481 AbstractCegarLoop]: Abstraction has 34986 states and 48088 transitions. [2020-12-22 09:45:29,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 34986 states and 48088 transitions. [2020-12-22 09:45:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:45:29,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:29,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:29,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:45:29,454 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:29,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:29,455 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:45:29,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:29,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32624899] [2020-12-22 09:45:29,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:29,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32624899] [2020-12-22 09:45:29,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664317613] [2020-12-22 09:45:29,678 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 09:45:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:29,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:45:29,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:30,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:30,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:30,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-12-22 09:45:30,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868345838] [2020-12-22 09:45:30,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 09:45:30,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 09:45:30,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:45:30,408 INFO L87 Difference]: Start difference. First operand 34986 states and 48088 transitions. Second operand 19 states. [2020-12-22 09:45:30,574 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:45:30,862 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:45:31,008 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:45:31,166 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:31,705 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:32,879 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:33,131 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:33,361 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:33,614 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:34,237 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:37,979 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:38,290 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:45:38,431 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:38,941 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:39,585 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:39,850 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:45:40,223 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:40,607 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:41,164 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:45:41,570 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:41,771 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:42,084 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-22 09:45:42,311 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:45:43,946 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:44,482 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:45:44,852 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:50,357 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:45:50,800 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:45:51,547 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:51,832 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:45:52,661 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:52,964 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:01,620 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:02,435 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:06,283 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:06,745 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:11,635 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:16,635 INFO L93 Difference]: Finished difference Result 372069 states and 495358 transitions. [2020-12-22 09:46:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:46:16,636 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-22 09:46:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:17,345 INFO L225 Difference]: With dead ends: 372069 [2020-12-22 09:46:17,346 INFO L226 Difference]: Without dead ends: 338619 [2020-12-22 09:46:17,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6674 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=2822, Invalid=15538, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 09:46:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338619 states. [2020-12-22 09:46:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338619 to 166484. [2020-12-22 09:46:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166484 states. [2020-12-22 09:46:35,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166484 states to 166484 states and 224208 transitions. [2020-12-22 09:46:35,179 INFO L78 Accepts]: Start accepts. Automaton has 166484 states and 224208 transitions. Word has length 81 [2020-12-22 09:46:35,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:35,179 INFO L481 AbstractCegarLoop]: Abstraction has 166484 states and 224208 transitions. [2020-12-22 09:46:35,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 09:46:35,179 INFO L276 IsEmpty]: Start isEmpty. Operand 166484 states and 224208 transitions. [2020-12-22 09:46:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:35,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:35,187 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:35,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:35,401 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:46:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:35,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645843275] [2020-12-22 09:46:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:35,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645843275] [2020-12-22 09:46:35,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:35,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:35,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969127474] [2020-12-22 09:46:35,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:35,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:35,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:35,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:35,479 INFO L87 Difference]: Start difference. First operand 166484 states and 224208 transitions. Second operand 3 states. [2020-12-22 09:46:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:44,755 INFO L93 Difference]: Finished difference Result 258048 states and 346724 transitions. [2020-12-22 09:46:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:44,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:44,906 INFO L225 Difference]: With dead ends: 258048 [2020-12-22 09:46:44,907 INFO L226 Difference]: Without dead ends: 93100 [2020-12-22 09:46:44,987 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 09:46:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93100 states. [2020-12-22 09:46:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93100 to 93098. [2020-12-22 09:46:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93098 states. [2020-12-22 09:46:53,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93098 states to 93098 states and 123664 transitions. [2020-12-22 09:46:53,684 INFO L78 Accepts]: Start accepts. Automaton has 93098 states and 123664 transitions. Word has length 81 [2020-12-22 09:46:53,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:53,684 INFO L481 AbstractCegarLoop]: Abstraction has 93098 states and 123664 transitions. [2020-12-22 09:46:53,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 93098 states and 123664 transitions. [2020-12-22 09:46:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:53,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:53,690 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:53,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:46:53,690 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:46:53,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:53,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024367362] [2020-12-22 09:46:53,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:53,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024367362] [2020-12-22 09:46:53,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:53,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:53,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284187909] [2020-12-22 09:46:53,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:53,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:53,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:53,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:53,745 INFO L87 Difference]: Start difference. First operand 93098 states and 123664 transitions. Second operand 3 states. [2020-12-22 09:46:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:58,670 INFO L93 Difference]: Finished difference Result 135079 states and 179532 transitions. [2020-12-22 09:46:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:58,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:58,731 INFO L225 Difference]: With dead ends: 135079 [2020-12-22 09:46:58,731 INFO L226 Difference]: Without dead ends: 43517 [2020-12-22 09:46:58,779 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 09:46:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43517 states. [2020-12-22 09:47:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43517 to 43491. [2020-12-22 09:47:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43491 states. [2020-12-22 09:47:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43491 states to 43491 states and 57892 transitions. [2020-12-22 09:47:02,724 INFO L78 Accepts]: Start accepts. Automaton has 43491 states and 57892 transitions. Word has length 81 [2020-12-22 09:47:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:02,725 INFO L481 AbstractCegarLoop]: Abstraction has 43491 states and 57892 transitions. [2020-12-22 09:47:02,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:02,725 INFO L276 IsEmpty]: Start isEmpty. Operand 43491 states and 57892 transitions. [2020-12-22 09:47:02,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:02,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:02,729 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:02,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:47:02,729 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:02,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:02,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:47:02,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:02,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317383608] [2020-12-22 09:47:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:02,803 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 09:47:02,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317383608] [2020-12-22 09:47:02,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:02,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:02,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207421543] [2020-12-22 09:47:02,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:02,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:02,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:02,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:02,805 INFO L87 Difference]: Start difference. First operand 43491 states and 57892 transitions. Second operand 6 states. [2020-12-22 09:47:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:05,725 INFO L93 Difference]: Finished difference Result 66813 states and 88462 transitions. [2020-12-22 09:47:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:05,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:05,760 INFO L225 Difference]: With dead ends: 66813 [2020-12-22 09:47:05,760 INFO L226 Difference]: Without dead ends: 24895 [2020-12-22 09:47:05,779 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 09:47:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24895 states. [2020-12-22 09:47:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24895 to 24895. [2020-12-22 09:47:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24895 states. [2020-12-22 09:47:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24895 states to 24895 states and 33057 transitions. [2020-12-22 09:47:08,248 INFO L78 Accepts]: Start accepts. Automaton has 24895 states and 33057 transitions. Word has length 81 [2020-12-22 09:47:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:08,248 INFO L481 AbstractCegarLoop]: Abstraction has 24895 states and 33057 transitions. [2020-12-22 09:47:08,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 24895 states and 33057 transitions. [2020-12-22 09:47:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:08,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:08,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:08,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:47:08,251 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:47:08,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:08,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545242708] [2020-12-22 09:47:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:08,326 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 09:47:08,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545242708] [2020-12-22 09:47:08,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:08,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:08,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060863653] [2020-12-22 09:47:08,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:08,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:08,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:08,331 INFO L87 Difference]: Start difference. First operand 24895 states and 33057 transitions. Second operand 6 states. [2020-12-22 09:47:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:10,614 INFO L93 Difference]: Finished difference Result 43465 states and 57192 transitions. [2020-12-22 09:47:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:10,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:10,641 INFO L225 Difference]: With dead ends: 43465 [2020-12-22 09:47:10,641 INFO L226 Difference]: Without dead ends: 20125 [2020-12-22 09:47:10,650 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 09:47:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20125 states. [2020-12-22 09:47:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20125 to 20125. [2020-12-22 09:47:12,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20125 states. [2020-12-22 09:47:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20125 states to 20125 states and 26735 transitions. [2020-12-22 09:47:12,516 INFO L78 Accepts]: Start accepts. Automaton has 20125 states and 26735 transitions. Word has length 81 [2020-12-22 09:47:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:12,516 INFO L481 AbstractCegarLoop]: Abstraction has 20125 states and 26735 transitions. [2020-12-22 09:47:12,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 20125 states and 26735 transitions. [2020-12-22 09:47:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:47:12,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:12,519 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:12,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:47:12,520 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:12,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:47:12,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:12,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028693538] [2020-12-22 09:47:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:12,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028693538] [2020-12-22 09:47:12,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:12,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:12,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998007936] [2020-12-22 09:47:12,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:12,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:12,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:12,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:12,593 INFO L87 Difference]: Start difference. First operand 20125 states and 26735 transitions. Second operand 3 states. [2020-12-22 09:47:13,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:13,596 INFO L93 Difference]: Finished difference Result 29501 states and 38705 transitions. [2020-12-22 09:47:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:13,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:47:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:13,608 INFO L225 Difference]: With dead ends: 29501 [2020-12-22 09:47:13,608 INFO L226 Difference]: Without dead ends: 10931 [2020-12-22 09:47:13,618 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 09:47:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10931 states. [2020-12-22 09:47:14,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10931 to 10929. [2020-12-22 09:47:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10929 states. [2020-12-22 09:47:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10929 states to 10929 states and 14657 transitions. [2020-12-22 09:47:14,590 INFO L78 Accepts]: Start accepts. Automaton has 10929 states and 14657 transitions. Word has length 82 [2020-12-22 09:47:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:14,590 INFO L481 AbstractCegarLoop]: Abstraction has 10929 states and 14657 transitions. [2020-12-22 09:47:14,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 10929 states and 14657 transitions. [2020-12-22 09:47:14,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:47:14,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:14,592 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:14,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:47:14,592 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:14,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:47:14,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:14,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800925163] [2020-12-22 09:47:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:15,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800925163] [2020-12-22 09:47:15,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276287036] [2020-12-22 09:47:15,204 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 09:47:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:15,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 09:47:15,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:17,685 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:47:17,915 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:47:18,202 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:47:18,222 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:47:18,613 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 09:47:18,912 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:47:18,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:47:18,956 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:18,973 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:18,982 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:18,983 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:47:18,984 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:18,995 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:47:18,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:20,075 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-12-22 09:47:20,516 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:47:20,945 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-12-22 09:47:20,966 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:21,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:47:24,315 WARN L197 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 4197 DAG size of output: 3666 [2020-12-22 09:47:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:24,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:24,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 39 [2020-12-22 09:47:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94928501] [2020-12-22 09:47:24,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:47:24,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:24,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:47:24,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:47:24,893 INFO L87 Difference]: Start difference. First operand 10929 states and 14657 transitions. Second operand 39 states. [2020-12-22 09:47:26,043 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-12-22 09:47:26,476 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-12-22 09:47:26,680 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-12-22 09:47:26,942 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-12-22 09:47:27,286 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-12-22 09:47:27,780 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-12-22 09:47:28,168 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-12-22 09:47:28,559 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-12-22 09:47:28,979 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-12-22 09:47:29,438 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-12-22 09:47:29,951 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 09:47:30,434 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-12-22 09:47:30,963 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 72 [2020-12-22 09:47:31,520 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 09:47:32,216 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-12-22 09:47:33,012 WARN L197 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-12-22 09:47:34,348 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-12-22 09:47:35,081 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-12-22 09:47:36,565 WARN L197 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 139 DAG size of output: 108 [2020-12-22 09:47:37,529 WARN L197 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-22 09:47:38,210 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-22 09:47:38,722 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-12-22 09:47:38,940 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:47:39,477 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-22 09:47:39,915 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 09:47:40,312 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:47:40,630 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:47:42,165 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 09:47:42,424 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:47:42,901 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:47:44,174 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-22 09:47:44,851 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-12-22 09:47:45,367 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-22 09:47:45,811 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:47:46,932 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-22 09:47:47,300 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 09:47:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:49,892 INFO L93 Difference]: Finished difference Result 24470 states and 31286 transitions. [2020-12-22 09:47:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:47:49,894 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-12-22 09:47:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:49,916 INFO L225 Difference]: With dead ends: 24470 [2020-12-22 09:47:49,916 INFO L226 Difference]: Without dead ends: 21060 [2020-12-22 09:47:49,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=1679, Invalid=6511, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 09:47:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21060 states. [2020-12-22 09:47:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21060 to 10381. [2020-12-22 09:47:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10381 states. [2020-12-22 09:47:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10381 states to 10381 states and 13929 transitions. [2020-12-22 09:47:51,114 INFO L78 Accepts]: Start accepts. Automaton has 10381 states and 13929 transitions. Word has length 83 [2020-12-22 09:47:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:51,115 INFO L481 AbstractCegarLoop]: Abstraction has 10381 states and 13929 transitions. [2020-12-22 09:47:51,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:47:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 10381 states and 13929 transitions. [2020-12-22 09:47:51,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:47:51,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:51,116 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:51,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:47:51,317 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:47:51,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:51,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367189291] [2020-12-22 09:47:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:51,962 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:47:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:52,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367189291] [2020-12-22 09:47:52,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009786591] [2020-12-22 09:47:52,342 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 09:47:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:52,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 09:47:52,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:53,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:53,948 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-12-22 09:47:54,372 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:47:54,623 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:47:55,019 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 09:47:55,039 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:55,481 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:47:55,818 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:47:55,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:55,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:55,848 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:56,332 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:47:56,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:56,629 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:56,630 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:56,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:57,447 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-12-22 09:47:57,806 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 09:47:58,251 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:47:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:58,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:58,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2020-12-22 09:47:58,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95248827] [2020-12-22 09:47:58,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 09:47:58,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:58,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 09:47:58,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:47:58,350 INFO L87 Difference]: Start difference. First operand 10381 states and 13929 transitions. Second operand 37 states. [2020-12-22 09:47:59,794 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-12-22 09:48:00,064 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-12-22 09:48:00,378 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-12-22 09:48:00,673 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-12-22 09:48:01,031 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-12-22 09:48:01,477 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-12-22 09:48:02,012 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-12-22 09:48:02,566 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-12-22 09:48:03,209 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-12-22 09:48:03,788 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:48:04,378 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:48:05,024 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-12-22 09:48:05,949 WARN L197 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-12-22 09:48:06,674 WARN L197 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-12-22 09:48:07,214 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:48:07,791 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-12-22 09:48:08,123 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 09:48:08,951 WARN L197 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-12-22 09:48:09,288 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-12-22 09:48:10,105 WARN L197 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-12-22 09:48:10,790 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:48:11,224 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 09:48:11,652 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:48:12,046 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:48:12,468 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 61