/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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:49:02,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:49:02,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:49:02,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:49:02,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:49:02,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:49:02,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:49:02,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:49:02,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:49:02,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:49:02,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:49:02,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:49:02,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:49:02,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:49:02,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:49:02,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:49:03,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:49:03,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:49:03,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:49:03,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:49:03,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:49:03,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:49:03,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:49:03,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:49:03,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:49:03,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:49:03,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:49:03,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:49:03,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:49:03,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:49:03,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:49:03,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:49:03,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:49:03,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:49:03,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:49:03,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:49:03,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:49:03,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:49:03,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:49:03,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:49:03,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:49:03,116 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:49:03,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:49:03,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:49:03,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:49:03,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:49:03,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:49:03,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:49:03,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:49:03,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:49:03,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:49:03,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:49:03,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:49:03,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:49:03,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:49:03,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:49:03,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:49:03,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:49:03,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:49:03,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:49:03,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:49:03,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:49:03,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:49:03,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:49:03,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:49:03,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:49:03,544 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:49:03,544 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:49:03,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:49:03,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9195c7b5/3bd90e5f4ed641dea48a558adc182875/FLAG2aa1d88d7 [2020-12-22 09:49:04,677 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:49:04,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:49:04,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9195c7b5/3bd90e5f4ed641dea48a558adc182875/FLAG2aa1d88d7 [2020-12-22 09:49:05,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9195c7b5/3bd90e5f4ed641dea48a558adc182875 [2020-12-22 09:49:05,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:49:05,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:49:05,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:49:05,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:49:05,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:49:05,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:49:05" (1/1) ... [2020-12-22 09:49:05,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7df994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:05, skipping insertion in model container [2020-12-22 09:49:05,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:49:05" (1/1) ... [2020-12-22 09:49:05,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:49:05,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:49:05,658 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[8858,8871] [2020-12-22 09:49:05,717 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[14170,14183] [2020-12-22 09:49:06,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:49:06,692 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:49:06,758 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[8858,8871] [2020-12-22 09:49:06,817 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[14170,14183] [2020-12-22 09:49:07,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:49:07,454 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:49:07,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07 WrapperNode [2020-12-22 09:49:07,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:49:07,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:49:07,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:49:07,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:49:07,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (1/1) ... [2020-12-22 09:49:07,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (1/1) ... [2020-12-22 09:49:07,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:49:07,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:49:07,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:49:07,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:49:08,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (1/1) ... [2020-12-22 09:49:08,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (1/1) ... [2020-12-22 09:49:08,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (1/1) ... [2020-12-22 09:49:08,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (1/1) ... [2020-12-22 09:49:08,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (1/1) ... [2020-12-22 09:49:08,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (1/1) ... [2020-12-22 09:49:08,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (1/1) ... [2020-12-22 09:49:08,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:49:08,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:49:08,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:49:08,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:49:08,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (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 09:49:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:49:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:49:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:49:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:49:15,183 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:49:15,183 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:49:15,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:49:15 BoogieIcfgContainer [2020-12-22 09:49:15,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:49:15,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:49:15,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:49:15,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:49:15,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:49:05" (1/3) ... [2020-12-22 09:49:15,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de97c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:49:15, skipping insertion in model container [2020-12-22 09:49:15,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:07" (2/3) ... [2020-12-22 09:49:15,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de97c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:49:15, skipping insertion in model container [2020-12-22 09:49:15,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:49:15" (3/3) ... [2020-12-22 09:49:15,199 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:49:15,206 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:49:15,213 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:49:15,234 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:49:15,269 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:49:15,269 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:49:15,269 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:49:15,270 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:49:15,270 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:49:15,270 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:49:15,270 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:49:15,270 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:49:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states. [2020-12-22 09:49:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:49:15,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:15,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:15,317 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:15,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:49:15,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:15,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105698695] [2020-12-22 09:49:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:15,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105698695] [2020-12-22 09:49:15,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:15,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:49:15,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358778138] [2020-12-22 09:49:15,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:49:15,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:15,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:49:15,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:49:15,724 INFO L87 Difference]: Start difference. First operand 892 states. Second operand 2 states. [2020-12-22 09:49:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:15,831 INFO L93 Difference]: Finished difference Result 1753 states and 3328 transitions. [2020-12-22 09:49:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:49:15,832 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:49:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:15,859 INFO L225 Difference]: With dead ends: 1753 [2020-12-22 09:49:15,859 INFO L226 Difference]: Without dead ends: 826 [2020-12-22 09:49:15,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:49:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-12-22 09:49:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2020-12-22 09:49:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2020-12-22 09:49:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1559 transitions. [2020-12-22 09:49:15,982 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1559 transitions. Word has length 30 [2020-12-22 09:49:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:15,982 INFO L481 AbstractCegarLoop]: Abstraction has 826 states and 1559 transitions. [2020-12-22 09:49:15,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:49:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1559 transitions. [2020-12-22 09:49:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:49:15,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:15,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:15,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:49:15,987 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:15,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:49:15,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:15,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851922632] [2020-12-22 09:49:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:16,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851922632] [2020-12-22 09:49:16,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:16,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:16,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014776542] [2020-12-22 09:49:16,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:49:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:49:16,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:49:16,168 INFO L87 Difference]: Start difference. First operand 826 states and 1559 transitions. Second operand 5 states. [2020-12-22 09:49:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:16,427 INFO L93 Difference]: Finished difference Result 873 states and 1631 transitions. [2020-12-22 09:49:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:49:16,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:49:16,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:16,435 INFO L225 Difference]: With dead ends: 873 [2020-12-22 09:49:16,435 INFO L226 Difference]: Without dead ends: 826 [2020-12-22 09:49:16,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:49:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-12-22 09:49:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2020-12-22 09:49:16,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2020-12-22 09:49:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1536 transitions. [2020-12-22 09:49:16,473 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1536 transitions. Word has length 30 [2020-12-22 09:49:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:16,474 INFO L481 AbstractCegarLoop]: Abstraction has 826 states and 1536 transitions. [2020-12-22 09:49:16,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:49:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1536 transitions. [2020-12-22 09:49:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:49:16,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:16,476 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 09:49:16,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:49:16,477 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:16,478 INFO L82 PathProgramCache]: Analyzing trace with hash -111586187, now seen corresponding path program 1 times [2020-12-22 09:49:16,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:16,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182875063] [2020-12-22 09:49:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:16,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182875063] [2020-12-22 09:49:16,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:16,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:49:16,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662998964] [2020-12-22 09:49:16,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:16,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:16,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:16,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:16,656 INFO L87 Difference]: Start difference. First operand 826 states and 1536 transitions. Second operand 3 states. [2020-12-22 09:49:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:23,023 INFO L93 Difference]: Finished difference Result 2330 states and 4409 transitions. [2020-12-22 09:49:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:23,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 09:49:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:23,035 INFO L225 Difference]: With dead ends: 2330 [2020-12-22 09:49:23,036 INFO L226 Difference]: Without dead ends: 1577 [2020-12-22 09:49:23,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2020-12-22 09:49:23,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1577. [2020-12-22 09:49:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1577 states. [2020-12-22 09:49:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2911 transitions. [2020-12-22 09:49:23,085 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2911 transitions. Word has length 48 [2020-12-22 09:49:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:23,086 INFO L481 AbstractCegarLoop]: Abstraction has 1577 states and 2911 transitions. [2020-12-22 09:49:23,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2911 transitions. [2020-12-22 09:49:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:49:23,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:23,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:23,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:49:23,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:49:23,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:23,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776461319] [2020-12-22 09:49:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:23,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776461319] [2020-12-22 09:49:23,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:23,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:23,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77312999] [2020-12-22 09:49:23,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:23,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:23,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:23,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:23,206 INFO L87 Difference]: Start difference. First operand 1577 states and 2911 transitions. Second operand 3 states. [2020-12-22 09:49:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:23,251 INFO L93 Difference]: Finished difference Result 1657 states and 3037 transitions. [2020-12-22 09:49:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:23,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:49:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:23,265 INFO L225 Difference]: With dead ends: 1657 [2020-12-22 09:49:23,265 INFO L226 Difference]: Without dead ends: 1614 [2020-12-22 09:49:23,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:23,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2020-12-22 09:49:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1612. [2020-12-22 09:49:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2020-12-22 09:49:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2967 transitions. [2020-12-22 09:49:23,316 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2967 transitions. Word has length 52 [2020-12-22 09:49:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:23,317 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 2967 transitions. [2020-12-22 09:49:23,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2967 transitions. [2020-12-22 09:49:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:49:23,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:23,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:23,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:49:23,324 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:23,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:23,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:49:23,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:23,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955549842] [2020-12-22 09:49:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:23,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955549842] [2020-12-22 09:49:23,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:23,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:23,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039628606] [2020-12-22 09:49:23,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:23,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:23,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:23,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:23,420 INFO L87 Difference]: Start difference. First operand 1612 states and 2967 transitions. Second operand 3 states. [2020-12-22 09:49:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:23,457 INFO L93 Difference]: Finished difference Result 1756 states and 3195 transitions. [2020-12-22 09:49:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:23,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:49:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:23,468 INFO L225 Difference]: With dead ends: 1756 [2020-12-22 09:49:23,468 INFO L226 Difference]: Without dead ends: 1678 [2020-12-22 09:49:23,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2020-12-22 09:49:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1676. [2020-12-22 09:49:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2020-12-22 09:49:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 3068 transitions. [2020-12-22 09:49:23,522 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 3068 transitions. Word has length 52 [2020-12-22 09:49:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:23,522 INFO L481 AbstractCegarLoop]: Abstraction has 1676 states and 3068 transitions. [2020-12-22 09:49:23,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 3068 transitions. [2020-12-22 09:49:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:49:23,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:23,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:23,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:49:23,524 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:23,525 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:49:23,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:23,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848271228] [2020-12-22 09:49:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:23,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848271228] [2020-12-22 09:49:23,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:23,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:23,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769156741] [2020-12-22 09:49:23,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:23,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:23,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:23,589 INFO L87 Difference]: Start difference. First operand 1676 states and 3068 transitions. Second operand 3 states. [2020-12-22 09:49:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:23,639 INFO L93 Difference]: Finished difference Result 1936 states and 3478 transitions. [2020-12-22 09:49:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:23,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:49:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:23,654 INFO L225 Difference]: With dead ends: 1936 [2020-12-22 09:49:23,654 INFO L226 Difference]: Without dead ends: 1794 [2020-12-22 09:49:23,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:23,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2020-12-22 09:49:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1792. [2020-12-22 09:49:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1792 states. [2020-12-22 09:49:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 3248 transitions. [2020-12-22 09:49:23,723 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 3248 transitions. Word has length 52 [2020-12-22 09:49:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:23,723 INFO L481 AbstractCegarLoop]: Abstraction has 1792 states and 3248 transitions. [2020-12-22 09:49:23,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 3248 transitions. [2020-12-22 09:49:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:49:23,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:23,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:23,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:49:23,726 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:23,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:23,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:49:23,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:23,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670277541] [2020-12-22 09:49:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:23,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670277541] [2020-12-22 09:49:23,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:23,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:23,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050909237] [2020-12-22 09:49:23,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:23,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:23,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:23,784 INFO L87 Difference]: Start difference. First operand 1792 states and 3248 transitions. Second operand 3 states. [2020-12-22 09:49:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:23,834 INFO L93 Difference]: Finished difference Result 2260 states and 3978 transitions. [2020-12-22 09:49:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:23,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:49:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:23,850 INFO L225 Difference]: With dead ends: 2260 [2020-12-22 09:49:23,850 INFO L226 Difference]: Without dead ends: 2002 [2020-12-22 09:49:23,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2020-12-22 09:49:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 2000. [2020-12-22 09:49:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2000 states. [2020-12-22 09:49:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 3564 transitions. [2020-12-22 09:49:23,917 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 3564 transitions. Word has length 52 [2020-12-22 09:49:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:23,918 INFO L481 AbstractCegarLoop]: Abstraction has 2000 states and 3564 transitions. [2020-12-22 09:49:23,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 3564 transitions. [2020-12-22 09:49:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:49:23,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:23,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:23,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:49:23,920 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:23,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:49:23,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:23,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427240434] [2020-12-22 09:49:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:24,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427240434] [2020-12-22 09:49:24,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:24,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:24,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018561247] [2020-12-22 09:49:24,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:24,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:24,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:24,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:24,008 INFO L87 Difference]: Start difference. First operand 2000 states and 3564 transitions. Second operand 6 states. [2020-12-22 09:49:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:24,386 INFO L93 Difference]: Finished difference Result 5728 states and 9332 transitions. [2020-12-22 09:49:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:49:24,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:49:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:24,423 INFO L225 Difference]: With dead ends: 5728 [2020-12-22 09:49:24,424 INFO L226 Difference]: Without dead ends: 5262 [2020-12-22 09:49:24,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:49:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2020-12-22 09:49:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 2464. [2020-12-22 09:49:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2464 states. [2020-12-22 09:49:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 4252 transitions. [2020-12-22 09:49:24,593 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 4252 transitions. Word has length 52 [2020-12-22 09:49:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:24,596 INFO L481 AbstractCegarLoop]: Abstraction has 2464 states and 4252 transitions. [2020-12-22 09:49:24,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 4252 transitions. [2020-12-22 09:49:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:24,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:24,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:24,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:49:24,597 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:24,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:24,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:49:24,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:24,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524394053] [2020-12-22 09:49:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:24,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524394053] [2020-12-22 09:49:24,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:24,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:24,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95728440] [2020-12-22 09:49:24,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:24,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:24,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:24,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:24,721 INFO L87 Difference]: Start difference. First operand 2464 states and 4252 transitions. Second operand 3 states. [2020-12-22 09:49:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:24,835 INFO L93 Difference]: Finished difference Result 3822 states and 6304 transitions. [2020-12-22 09:49:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:24,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:49:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:24,853 INFO L225 Difference]: With dead ends: 3822 [2020-12-22 09:49:24,853 INFO L226 Difference]: Without dead ends: 2892 [2020-12-22 09:49:24,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2020-12-22 09:49:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2890. [2020-12-22 09:49:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2890 states. [2020-12-22 09:49:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4870 transitions. [2020-12-22 09:49:24,997 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4870 transitions. Word has length 54 [2020-12-22 09:49:24,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:24,997 INFO L481 AbstractCegarLoop]: Abstraction has 2890 states and 4870 transitions. [2020-12-22 09:49:24,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:24,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4870 transitions. [2020-12-22 09:49:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:24,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:24,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:24,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:49:24,999 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:49:24,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:25,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127041697] [2020-12-22 09:49:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:25,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127041697] [2020-12-22 09:49:25,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:25,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:25,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964925281] [2020-12-22 09:49:25,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:25,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:25,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:25,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:25,202 INFO L87 Difference]: Start difference. First operand 2890 states and 4870 transitions. Second operand 6 states. [2020-12-22 09:49:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:25,441 INFO L93 Difference]: Finished difference Result 4246 states and 6896 transitions. [2020-12-22 09:49:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:25,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:49:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:25,464 INFO L225 Difference]: With dead ends: 4246 [2020-12-22 09:49:25,464 INFO L226 Difference]: Without dead ends: 2892 [2020-12-22 09:49:25,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:49:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2020-12-22 09:49:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2890. [2020-12-22 09:49:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2890 states. [2020-12-22 09:49:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4846 transitions. [2020-12-22 09:49:25,611 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4846 transitions. Word has length 54 [2020-12-22 09:49:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:25,611 INFO L481 AbstractCegarLoop]: Abstraction has 2890 states and 4846 transitions. [2020-12-22 09:49:25,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4846 transitions. [2020-12-22 09:49:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:49:25,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:25,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:25,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:49:25,613 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:25,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:49:25,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:25,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945155735] [2020-12-22 09:49:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:25,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945155735] [2020-12-22 09:49:25,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:25,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:25,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122116874] [2020-12-22 09:49:25,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:25,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:25,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:25,718 INFO L87 Difference]: Start difference. First operand 2890 states and 4846 transitions. Second operand 6 states. [2020-12-22 09:49:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:25,955 INFO L93 Difference]: Finished difference Result 4244 states and 6847 transitions. [2020-12-22 09:49:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:25,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:49:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:25,987 INFO L225 Difference]: With dead ends: 4244 [2020-12-22 09:49:25,987 INFO L226 Difference]: Without dead ends: 2890 [2020-12-22 09:49:25,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:26,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2020-12-22 09:49:26,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2890. [2020-12-22 09:49:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2890 states. [2020-12-22 09:49:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4822 transitions. [2020-12-22 09:49:26,148 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4822 transitions. Word has length 55 [2020-12-22 09:49:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:26,148 INFO L481 AbstractCegarLoop]: Abstraction has 2890 states and 4822 transitions. [2020-12-22 09:49:26,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4822 transitions. [2020-12-22 09:49:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:49:26,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:26,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:26,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:49:26,150 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:26,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:26,150 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:49:26,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:26,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62028603] [2020-12-22 09:49:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:26,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62028603] [2020-12-22 09:49:26,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:26,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:26,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768930695] [2020-12-22 09:49:26,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:26,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:26,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:26,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:26,235 INFO L87 Difference]: Start difference. First operand 2890 states and 4822 transitions. Second operand 6 states. [2020-12-22 09:49:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:26,483 INFO L93 Difference]: Finished difference Result 4244 states and 6799 transitions. [2020-12-22 09:49:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:26,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:49:26,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:26,492 INFO L225 Difference]: With dead ends: 4244 [2020-12-22 09:49:26,493 INFO L226 Difference]: Without dead ends: 2890 [2020-12-22 09:49:26,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2020-12-22 09:49:26,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2890. [2020-12-22 09:49:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2890 states. [2020-12-22 09:49:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4798 transitions. [2020-12-22 09:49:26,714 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4798 transitions. Word has length 55 [2020-12-22 09:49:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:26,718 INFO L481 AbstractCegarLoop]: Abstraction has 2890 states and 4798 transitions. [2020-12-22 09:49:26,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4798 transitions. [2020-12-22 09:49:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:49:26,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:26,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:26,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:49:26,722 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:49:26,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:26,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469505394] [2020-12-22 09:49:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:26,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469505394] [2020-12-22 09:49:26,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:26,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:26,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339155137] [2020-12-22 09:49:26,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:49:26,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:26,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:49:26,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:49:26,818 INFO L87 Difference]: Start difference. First operand 2890 states and 4798 transitions. Second operand 5 states. [2020-12-22 09:49:27,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:27,105 INFO L93 Difference]: Finished difference Result 4089 states and 6464 transitions. [2020-12-22 09:49:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:49:27,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:49:27,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:27,115 INFO L225 Difference]: With dead ends: 4089 [2020-12-22 09:49:27,115 INFO L226 Difference]: Without dead ends: 4087 [2020-12-22 09:49:27,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:49:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2020-12-22 09:49:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 2986. [2020-12-22 09:49:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2986 states. [2020-12-22 09:49:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 4886 transitions. [2020-12-22 09:49:27,300 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 4886 transitions. Word has length 55 [2020-12-22 09:49:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:27,301 INFO L481 AbstractCegarLoop]: Abstraction has 2986 states and 4886 transitions. [2020-12-22 09:49:27,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:49:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 4886 transitions. [2020-12-22 09:49:27,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:27,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:27,308 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] [2020-12-22 09:49:27,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:49:27,308 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:27,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1830558034, now seen corresponding path program 1 times [2020-12-22 09:49:27,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:27,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326206184] [2020-12-22 09:49:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:27,407 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 09:49:27,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326206184] [2020-12-22 09:49:27,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:27,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:27,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406355830] [2020-12-22 09:49:27,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:27,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:27,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:27,410 INFO L87 Difference]: Start difference. First operand 2986 states and 4886 transitions. Second operand 6 states. [2020-12-22 09:49:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:27,961 INFO L93 Difference]: Finished difference Result 9092 states and 13455 transitions. [2020-12-22 09:49:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:27,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:27,978 INFO L225 Difference]: With dead ends: 9092 [2020-12-22 09:49:27,978 INFO L226 Difference]: Without dead ends: 7642 [2020-12-22 09:49:27,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2020-12-22 09:49:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 4434. [2020-12-22 09:49:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4434 states. [2020-12-22 09:49:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 6902 transitions. [2020-12-22 09:49:28,361 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 6902 transitions. Word has length 78 [2020-12-22 09:49:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:28,361 INFO L481 AbstractCegarLoop]: Abstraction has 4434 states and 6902 transitions. [2020-12-22 09:49:28,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:28,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 6902 transitions. [2020-12-22 09:49:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:28,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:28,365 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] [2020-12-22 09:49:28,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:49:28,366 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:28,366 INFO L82 PathProgramCache]: Analyzing trace with hash 61775218, now seen corresponding path program 1 times [2020-12-22 09:49:28,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:28,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195655173] [2020-12-22 09:49:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:28,480 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 09:49:28,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195655173] [2020-12-22 09:49:28,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:28,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:28,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682494296] [2020-12-22 09:49:28,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:28,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:28,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:28,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:28,483 INFO L87 Difference]: Start difference. First operand 4434 states and 6902 transitions. Second operand 6 states. [2020-12-22 09:49:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:29,289 INFO L93 Difference]: Finished difference Result 10540 states and 15471 transitions. [2020-12-22 09:49:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:29,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:29,310 INFO L225 Difference]: With dead ends: 10540 [2020-12-22 09:49:29,310 INFO L226 Difference]: Without dead ends: 9090 [2020-12-22 09:49:29,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9090 states. [2020-12-22 09:49:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9090 to 6610. [2020-12-22 09:49:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6610 states. [2020-12-22 09:49:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6610 states to 6610 states and 9906 transitions. [2020-12-22 09:49:29,773 INFO L78 Accepts]: Start accepts. Automaton has 6610 states and 9906 transitions. Word has length 78 [2020-12-22 09:49:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:29,774 INFO L481 AbstractCegarLoop]: Abstraction has 6610 states and 9906 transitions. [2020-12-22 09:49:29,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6610 states and 9906 transitions. [2020-12-22 09:49:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:29,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:29,777 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] [2020-12-22 09:49:29,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:49:29,777 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1193415058, now seen corresponding path program 1 times [2020-12-22 09:49:29,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:29,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131048636] [2020-12-22 09:49:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:29,875 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 09:49:29,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131048636] [2020-12-22 09:49:29,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:29,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:29,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327207892] [2020-12-22 09:49:29,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:29,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:29,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:29,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:29,880 INFO L87 Difference]: Start difference. First operand 6610 states and 9906 transitions. Second operand 6 states. [2020-12-22 09:49:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:30,707 INFO L93 Difference]: Finished difference Result 11988 states and 17487 transitions. [2020-12-22 09:49:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:30,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:30,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:30,730 INFO L225 Difference]: With dead ends: 11988 [2020-12-22 09:49:30,730 INFO L226 Difference]: Without dead ends: 10538 [2020-12-22 09:49:30,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10538 states. [2020-12-22 09:49:31,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10538 to 8058. [2020-12-22 09:49:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8058 states. [2020-12-22 09:49:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8058 states to 8058 states and 11922 transitions. [2020-12-22 09:49:31,255 INFO L78 Accepts]: Start accepts. Automaton has 8058 states and 11922 transitions. Word has length 78 [2020-12-22 09:49:31,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:31,256 INFO L481 AbstractCegarLoop]: Abstraction has 8058 states and 11922 transitions. [2020-12-22 09:49:31,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8058 states and 11922 transitions. [2020-12-22 09:49:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:31,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:31,259 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] [2020-12-22 09:49:31,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:49:31,260 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:31,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:31,260 INFO L82 PathProgramCache]: Analyzing trace with hash -42043982, now seen corresponding path program 1 times [2020-12-22 09:49:31,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:31,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149690553] [2020-12-22 09:49:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:31,343 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 09:49:31,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149690553] [2020-12-22 09:49:31,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:31,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:31,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492435355] [2020-12-22 09:49:31,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:31,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:31,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:31,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:31,345 INFO L87 Difference]: Start difference. First operand 8058 states and 11922 transitions. Second operand 6 states. [2020-12-22 09:49:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:32,138 INFO L93 Difference]: Finished difference Result 12588 states and 18335 transitions. [2020-12-22 09:49:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:32,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:32,162 INFO L225 Difference]: With dead ends: 12588 [2020-12-22 09:49:32,163 INFO L226 Difference]: Without dead ends: 11562 [2020-12-22 09:49:32,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11562 states. [2020-12-22 09:49:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11562 to 9082. [2020-12-22 09:49:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9082 states. [2020-12-22 09:49:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9082 states to 9082 states and 13362 transitions. [2020-12-22 09:49:32,722 INFO L78 Accepts]: Start accepts. Automaton has 9082 states and 13362 transitions. Word has length 78 [2020-12-22 09:49:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:32,723 INFO L481 AbstractCegarLoop]: Abstraction has 9082 states and 13362 transitions. [2020-12-22 09:49:32,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:32,723 INFO L276 IsEmpty]: Start isEmpty. Operand 9082 states and 13362 transitions. [2020-12-22 09:49:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:49:32,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:32,727 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] [2020-12-22 09:49:32,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:49:32,727 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:32,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1839803446, now seen corresponding path program 1 times [2020-12-22 09:49:32,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:32,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37138130] [2020-12-22 09:49:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:32,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37138130] [2020-12-22 09:49:32,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599420573] [2020-12-22 09:49:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:33,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:49:33,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:49:33,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:33,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:49:33,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418680980] [2020-12-22 09:49:33,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:49:33,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:49:33,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:49:33,515 INFO L87 Difference]: Start difference. First operand 9082 states and 13362 transitions. Second operand 12 states. [2020-12-22 09:49:34,504 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-22 09:49:38,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:38,837 INFO L93 Difference]: Finished difference Result 38588 states and 54165 transitions. [2020-12-22 09:49:38,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:49:38,838 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-12-22 09:49:38,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:38,899 INFO L225 Difference]: With dead ends: 38588 [2020-12-22 09:49:38,899 INFO L226 Difference]: Without dead ends: 32954 [2020-12-22 09:49:38,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=438, Invalid=1818, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:49:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32954 states. [2020-12-22 09:49:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32954 to 25906. [2020-12-22 09:49:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25906 states. [2020-12-22 09:49:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25906 states to 25906 states and 36398 transitions. [2020-12-22 09:49:41,122 INFO L78 Accepts]: Start accepts. Automaton has 25906 states and 36398 transitions. Word has length 79 [2020-12-22 09:49:41,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:41,122 INFO L481 AbstractCegarLoop]: Abstraction has 25906 states and 36398 transitions. [2020-12-22 09:49:41,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:49:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 25906 states and 36398 transitions. [2020-12-22 09:49:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:49:41,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:41,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:41,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:49:41,340 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1196201514, now seen corresponding path program 1 times [2020-12-22 09:49:41,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:41,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469420381] [2020-12-22 09:49:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:41,585 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 09:49:41,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469420381] [2020-12-22 09:49:41,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351677034] [2020-12-22 09:49:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:41,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:49:41,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:41,880 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:42,174 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 09:49:42,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:42,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:42,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755460853] [2020-12-22 09:49:42,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:42,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:42,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:42,177 INFO L87 Difference]: Start difference. First operand 25906 states and 36398 transitions. Second operand 17 states. [2020-12-22 09:49:45,643 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:49:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:54,801 INFO L93 Difference]: Finished difference Result 153596 states and 209677 transitions. [2020-12-22 09:49:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:49:54,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-12-22 09:49:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:55,191 INFO L225 Difference]: With dead ends: 153596 [2020-12-22 09:49:55,191 INFO L226 Difference]: Without dead ends: 129226 [2020-12-22 09:49:55,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:49:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129226 states. [2020-12-22 09:50:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129226 to 55674. [2020-12-22 09:50:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55674 states. [2020-12-22 09:50:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55674 states to 55674 states and 76906 transitions. [2020-12-22 09:50:01,379 INFO L78 Accepts]: Start accepts. Automaton has 55674 states and 76906 transitions. Word has length 80 [2020-12-22 09:50:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:01,379 INFO L481 AbstractCegarLoop]: Abstraction has 55674 states and 76906 transitions. [2020-12-22 09:50:01,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:50:01,379 INFO L276 IsEmpty]: Start isEmpty. Operand 55674 states and 76906 transitions. [2020-12-22 09:50:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:50:01,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:01,385 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] [2020-12-22 09:50:01,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:01,599 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:01,601 INFO L82 PathProgramCache]: Analyzing trace with hash 305868284, now seen corresponding path program 1 times [2020-12-22 09:50:01,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:01,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294320865] [2020-12-22 09:50:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:01,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294320865] [2020-12-22 09:50:01,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456182855] [2020-12-22 09:50:01,854 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 09:50:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:01,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:50:01,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:02,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:50:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:02,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:02,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:50:02,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673920104] [2020-12-22 09:50:02,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:50:02,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:02,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:50:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:50:02,518 INFO L87 Difference]: Start difference. First operand 55674 states and 76906 transitions. Second operand 17 states. [2020-12-22 09:50:04,753 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:50:06,982 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:50:08,027 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-12-22 09:50:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:33,078 INFO L93 Difference]: Finished difference Result 347980 states and 472370 transitions. [2020-12-22 09:50:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:50:33,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-12-22 09:50:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:33,814 INFO L225 Difference]: With dead ends: 347980 [2020-12-22 09:50:33,814 INFO L226 Difference]: Without dead ends: 293842 [2020-12-22 09:50:33,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:50:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293842 states. [2020-12-22 09:50:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293842 to 133830. [2020-12-22 09:50:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133830 states. [2020-12-22 09:50:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133830 states to 133830 states and 183055 transitions. [2020-12-22 09:50:48,822 INFO L78 Accepts]: Start accepts. Automaton has 133830 states and 183055 transitions. Word has length 80 [2020-12-22 09:50:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:48,822 INFO L481 AbstractCegarLoop]: Abstraction has 133830 states and 183055 transitions. [2020-12-22 09:50:48,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:50:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 133830 states and 183055 transitions. [2020-12-22 09:50:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:50:48,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:48,842 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] [2020-12-22 09:50:49,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:49,043 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash 643661426, now seen corresponding path program 1 times [2020-12-22 09:50:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:49,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888840801] [2020-12-22 09:50:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:49,142 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 09:50:49,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888840801] [2020-12-22 09:50:49,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:49,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:49,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456948763] [2020-12-22 09:50:49,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:49,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:49,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:49,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:49,144 INFO L87 Difference]: Start difference. First operand 133830 states and 183055 transitions. Second operand 3 states. [2020-12-22 09:51:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:03,272 INFO L93 Difference]: Finished difference Result 266126 states and 363266 transitions. [2020-12-22 09:51:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:03,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:51:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:03,656 INFO L225 Difference]: With dead ends: 266126 [2020-12-22 09:51:03,657 INFO L226 Difference]: Without dead ends: 133832 [2020-12-22 09:51:03,754 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 09:51:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133832 states. [2020-12-22 09:51:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133832 to 130878. [2020-12-22 09:51:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130878 states. [2020-12-22 09:51:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130878 states to 130878 states and 176171 transitions. [2020-12-22 09:51:16,881 INFO L78 Accepts]: Start accepts. Automaton has 130878 states and 176171 transitions. Word has length 80 [2020-12-22 09:51:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:16,882 INFO L481 AbstractCegarLoop]: Abstraction has 130878 states and 176171 transitions. [2020-12-22 09:51:16,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 130878 states and 176171 transitions. [2020-12-22 09:51:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:51:16,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:16,887 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] [2020-12-22 09:51:16,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:51:16,887 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:16,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:16,888 INFO L82 PathProgramCache]: Analyzing trace with hash 369973714, now seen corresponding path program 1 times [2020-12-22 09:51:16,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:16,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079262489] [2020-12-22 09:51:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:17,170 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 09:51:17,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079262489] [2020-12-22 09:51:17,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:17,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:17,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099918120] [2020-12-22 09:51:17,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:17,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:17,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:17,175 INFO L87 Difference]: Start difference. First operand 130878 states and 176171 transitions. Second operand 3 states. [2020-12-22 09:51:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:24,518 INFO L93 Difference]: Finished difference Result 203378 states and 272726 transitions. [2020-12-22 09:51:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:24,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:51:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:24,628 INFO L225 Difference]: With dead ends: 203378 [2020-12-22 09:51:24,628 INFO L226 Difference]: Without dead ends: 74036 [2020-12-22 09:51:24,694 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 09:51:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74036 states. [2020-12-22 09:51:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74036 to 71802. [2020-12-22 09:51:31,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71802 states. [2020-12-22 09:51:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71802 states to 71802 states and 94455 transitions. [2020-12-22 09:51:31,906 INFO L78 Accepts]: Start accepts. Automaton has 71802 states and 94455 transitions. Word has length 80 [2020-12-22 09:51:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:31,906 INFO L481 AbstractCegarLoop]: Abstraction has 71802 states and 94455 transitions. [2020-12-22 09:51:31,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 71802 states and 94455 transitions. [2020-12-22 09:51:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:51:31,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:31,911 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] [2020-12-22 09:51:31,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:51:31,911 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:31,912 INFO L82 PathProgramCache]: Analyzing trace with hash 293809458, now seen corresponding path program 1 times [2020-12-22 09:51:31,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:31,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558093790] [2020-12-22 09:51:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:31,963 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 09:51:31,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558093790] [2020-12-22 09:51:31,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:31,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:31,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325407762] [2020-12-22 09:51:31,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:31,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:31,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:31,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:31,966 INFO L87 Difference]: Start difference. First operand 71802 states and 94455 transitions. Second operand 3 states. [2020-12-22 09:51:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:34,919 INFO L93 Difference]: Finished difference Result 98494 states and 129138 transitions. [2020-12-22 09:51:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:34,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:51:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:34,955 INFO L225 Difference]: With dead ends: 98494 [2020-12-22 09:51:34,956 INFO L226 Difference]: Without dead ends: 28228 [2020-12-22 09:51:34,986 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 09:51:35,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28228 states. [2020-12-22 09:51:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28228 to 26686. [2020-12-22 09:51:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26686 states. [2020-12-22 09:51:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26686 states to 26686 states and 35143 transitions. [2020-12-22 09:51:37,504 INFO L78 Accepts]: Start accepts. Automaton has 26686 states and 35143 transitions. Word has length 80 [2020-12-22 09:51:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:37,504 INFO L481 AbstractCegarLoop]: Abstraction has 26686 states and 35143 transitions. [2020-12-22 09:51:37,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:51:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 26686 states and 35143 transitions. [2020-12-22 09:51:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:51:37,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:37,506 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] [2020-12-22 09:51:37,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:51:37,506 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:37,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:37,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1743519558, now seen corresponding path program 1 times [2020-12-22 09:51:37,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:37,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797044170] [2020-12-22 09:51:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:51:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797044170] [2020-12-22 09:51:37,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:37,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:51:37,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283721473] [2020-12-22 09:51:37,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:51:37,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:37,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:51:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:51:37,575 INFO L87 Difference]: Start difference. First operand 26686 states and 35143 transitions. Second operand 6 states. [2020-12-22 09:51:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:39,643 INFO L93 Difference]: Finished difference Result 45506 states and 59404 transitions. [2020-12-22 09:51:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:51:39,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:51:39,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:39,666 INFO L225 Difference]: With dead ends: 45506 [2020-12-22 09:51:39,667 INFO L226 Difference]: Without dead ends: 20475 [2020-12-22 09:51:39,677 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 09:51:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20475 states. [2020-12-22 09:51:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20475 to 20475. [2020-12-22 09:51:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20475 states. [2020-12-22 09:51:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20475 states to 20475 states and 26835 transitions. [2020-12-22 09:51:41,829 INFO L78 Accepts]: Start accepts. Automaton has 20475 states and 26835 transitions. Word has length 80 [2020-12-22 09:51:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:41,829 INFO L481 AbstractCegarLoop]: Abstraction has 20475 states and 26835 transitions. [2020-12-22 09:51:41,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:51:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 20475 states and 26835 transitions. [2020-12-22 09:51:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:51:41,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:41,831 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] [2020-12-22 09:51:41,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:51:41,831 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:41,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1113390490, now seen corresponding path program 1 times [2020-12-22 09:51:41,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:41,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381851876] [2020-12-22 09:51:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:51:41,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381851876] [2020-12-22 09:51:41,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:41,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:51:41,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733629971] [2020-12-22 09:51:41,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:51:41,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:51:41,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:51:41,908 INFO L87 Difference]: Start difference. First operand 20475 states and 26835 transitions. Second operand 6 states. [2020-12-22 09:51:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:43,810 INFO L93 Difference]: Finished difference Result 35211 states and 45652 transitions. [2020-12-22 09:51:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:51:43,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:51:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:43,830 INFO L225 Difference]: With dead ends: 35211 [2020-12-22 09:51:43,830 INFO L226 Difference]: Without dead ends: 16311 [2020-12-22 09:51:43,839 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 09:51:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16311 states. [2020-12-22 09:51:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16311 to 16311. [2020-12-22 09:51:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16311 states. [2020-12-22 09:51:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16311 states to 16311 states and 21439 transitions. [2020-12-22 09:51:45,455 INFO L78 Accepts]: Start accepts. Automaton has 16311 states and 21439 transitions. Word has length 80 [2020-12-22 09:51:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:45,456 INFO L481 AbstractCegarLoop]: Abstraction has 16311 states and 21439 transitions. [2020-12-22 09:51:45,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:51:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 16311 states and 21439 transitions. [2020-12-22 09:51:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:51:45,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:45,457 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 09:51:45,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:51:45,458 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:45,458 INFO L82 PathProgramCache]: Analyzing trace with hash -68740960, now seen corresponding path program 1 times [2020-12-22 09:51:45,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:45,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509529985] [2020-12-22 09:51:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:45,726 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 09:51:45,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509529985] [2020-12-22 09:51:45,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208570369] [2020-12-22 09:51:45,727 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 09:51:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:45,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:51:45,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:46,209 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:51:46,665 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 09:51:46,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:46,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:51:46,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465485353] [2020-12-22 09:51:46,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:51:46,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:46,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:51:46,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:51:46,667 INFO L87 Difference]: Start difference. First operand 16311 states and 21439 transitions. Second operand 17 states. [2020-12-22 09:51:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:52,880 INFO L93 Difference]: Finished difference Result 55011 states and 70490 transitions. [2020-12-22 09:51:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 09:51:52,881 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-12-22 09:51:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:52,924 INFO L225 Difference]: With dead ends: 55011 [2020-12-22 09:51:52,924 INFO L226 Difference]: Without dead ends: 42338 [2020-12-22 09:51:52,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 09:51:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42338 states. [2020-12-22 09:51:56,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42338 to 30310. [2020-12-22 09:51:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30310 states. [2020-12-22 09:51:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30310 states to 30310 states and 39069 transitions. [2020-12-22 09:51:56,520 INFO L78 Accepts]: Start accepts. Automaton has 30310 states and 39069 transitions. Word has length 81 [2020-12-22 09:51:56,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:56,521 INFO L481 AbstractCegarLoop]: Abstraction has 30310 states and 39069 transitions. [2020-12-22 09:51:56,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:51:56,521 INFO L276 IsEmpty]: Start isEmpty. Operand 30310 states and 39069 transitions. [2020-12-22 09:51:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:51:56,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:56,523 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 09:51:56,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:56,724 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1149244438, now seen corresponding path program 1 times [2020-12-22 09:51:56,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:56,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202254656] [2020-12-22 09:51:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:56,799 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 09:51:56,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202254656] [2020-12-22 09:51:56,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:56,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:56,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161914149] [2020-12-22 09:51:56,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:56,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:56,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:56,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:56,802 INFO L87 Difference]: Start difference. First operand 30310 states and 39069 transitions. Second operand 3 states. [2020-12-22 09:51:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:59,216 INFO L93 Difference]: Finished difference Result 42898 states and 55107 transitions. [2020-12-22 09:51:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:51:59,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:51:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:59,237 INFO L225 Difference]: With dead ends: 42898 [2020-12-22 09:51:59,238 INFO L226 Difference]: Without dead ends: 16862 [2020-12-22 09:51:59,249 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 09:51:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16862 states. [2020-12-22 09:52:01,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16862 to 16860. [2020-12-22 09:52:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16860 states. [2020-12-22 09:52:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16860 states to 16860 states and 21561 transitions. [2020-12-22 09:52:01,125 INFO L78 Accepts]: Start accepts. Automaton has 16860 states and 21561 transitions. Word has length 81 [2020-12-22 09:52:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:01,125 INFO L481 AbstractCegarLoop]: Abstraction has 16860 states and 21561 transitions. [2020-12-22 09:52:01,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 16860 states and 21561 transitions. [2020-12-22 09:52:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:52:01,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:01,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:01,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:52:01,128 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:01,128 INFO L82 PathProgramCache]: Analyzing trace with hash -549108429, now seen corresponding path program 1 times [2020-12-22 09:52:01,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:01,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334633318] [2020-12-22 09:52:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:02,984 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 09:52:02,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334633318] [2020-12-22 09:52:02,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350620360] [2020-12-22 09:52:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:52:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:03,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:52:03,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:52:03,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:52:04,095 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:52:04,947 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 09:52:05,014 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 09:52:05,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:05,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 39 [2020-12-22 09:52:05,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391826752] [2020-12-22 09:52:05,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:52:05,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:05,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:52:05,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:52:05,016 INFO L87 Difference]: Start difference. First operand 16860 states and 21561 transitions. Second operand 39 states. [2020-12-22 09:52:05,628 WARN L197 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-12-22 09:52:06,862 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-12-22 09:52:07,224 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-12-22 09:52:07,487 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-12-22 09:52:07,735 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-12-22 09:52:08,076 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-12-22 09:52:08,396 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-12-22 09:52:08,832 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:52:09,427 WARN L197 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-12-22 09:52:10,236 WARN L197 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2020-12-22 09:52:10,991 WARN L197 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-12-22 09:52:11,470 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-12-22 09:52:11,952 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-12-22 09:52:12,359 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:52:12,881 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:52:13,316 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:52:13,833 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:52:14,208 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:52:14,560 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:52:15,138 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:52:15,425 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:52:15,832 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:52:16,212 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:52:16,558 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:52:16,985 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:52:17,321 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-12-22 09:52:17,681 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 09:52:18,277 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:52:18,571 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-12-22 09:52:19,169 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:52:19,662 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 09:52:20,012 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:52:20,368 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2020-12-22 09:52:20,810 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-22 09:52:21,292 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-12-22 09:52:21,583 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 09:52:22,306 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-12-22 09:52:22,712 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:52:23,007 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:52:23,324 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:52:24,091 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:52:24,429 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:52:24,783 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 09:52:25,226 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:52:25,792 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:52:26,224 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:52:26,819 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 09:52:27,625 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:52:28,749 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-12-22 09:52:29,195 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-12-22 09:52:30,116 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-12-22 09:52:30,696 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-12-22 09:52:31,119 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 09:52:31,490 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-12-22 09:52:32,010 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 09:52:32,363 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-22 09:52:32,835 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-12-22 09:52:33,404 WARN L197 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-12-22 09:52:33,792 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:52:34,694 WARN L197 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 86 [2020-12-22 09:52:35,368 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-12-22 09:52:35,954 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-12-22 09:52:36,283 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:52:36,795 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:52:37,415 WARN L197 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 09:52:38,462 WARN L197 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 108 [2020-12-22 09:52:38,882 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:52:39,520 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:52:40,960 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-22 09:52:42,679 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-22 09:52:43,385 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-12-22 09:52:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:44,220 INFO L93 Difference]: Finished difference Result 27903 states and 35202 transitions. [2020-12-22 09:52:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-22 09:52:44,222 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-12-22 09:52:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:44,244 INFO L225 Difference]: With dead ends: 27903 [2020-12-22 09:52:44,245 INFO L226 Difference]: Without dead ends: 22150 [2020-12-22 09:52:44,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=2361, Invalid=12645, Unknown=0, NotChecked=0, Total=15006 [2020-12-22 09:52:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22150 states. [2020-12-22 09:52:46,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22150 to 15254. [2020-12-22 09:52:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15254 states. [2020-12-22 09:52:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15254 states to 15254 states and 19646 transitions. [2020-12-22 09:52:46,213 INFO L78 Accepts]: Start accepts. Automaton has 15254 states and 19646 transitions. Word has length 82 [2020-12-22 09:52:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:46,213 INFO L481 AbstractCegarLoop]: Abstraction has 15254 states and 19646 transitions. [2020-12-22 09:52:46,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:52:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 15254 states and 19646 transitions. [2020-12-22 09:52:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:52:46,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:46,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:46,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:52:46,416 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2052898573, now seen corresponding path program 1 times [2020-12-22 09:52:46,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:46,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428246247] [2020-12-22 09:52:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:47,824 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 09:52:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428246247] [2020-12-22 09:52:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971589332] [2020-12-22 09:52:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:52:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:47,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 09:52:47,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:52:49,188 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:52:49,606 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-12-22 09:52:50,115 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:52:50,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:52:50,802 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-12-22 09:52:51,202 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-22 09:52:51,841 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-22 09:52:51,892 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-12-22 09:52:51,943 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 3 disjuncts [2020-12-22 09:52:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:52,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:52,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2020-12-22 09:52:52,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513710170] [2020-12-22 09:52:52,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:52:52,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:52,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:52:52,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:52:52,164 INFO L87 Difference]: Start difference. First operand 15254 states and 19646 transitions. Second operand 39 states. [2020-12-22 09:52:53,115 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24