/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.7.ufo.UNBOUNDED.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:15:51,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:15:51,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:15:52,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:15:52,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:15:52,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:15:52,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:15:52,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:15:52,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:15:52,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:15:52,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:15:52,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:15:52,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:15:52,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:15:52,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:15:52,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:15:52,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:15:52,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:15:52,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:15:52,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:15:52,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:15:52,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:15:52,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:15:52,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:15:52,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:15:52,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:15:52,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:15:52,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:15:52,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:15:52,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:15:52,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:15:52,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:15:52,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:15:52,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:15:52,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:15:52,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:15:52,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:15:52,142 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:15:52,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:15:52,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:15:52,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:15:52,148 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:15:52,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:15:52,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:15:52,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:15:52,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:15:52,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:15:52,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:15:52,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:15:52,151 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:15:52,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:15:52,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:15:52,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:15:52,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:15:52,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:15:52,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:15:52,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:15:52,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:15:52,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:15:52,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:15:52,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:15:52,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:15:52,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:15:52,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:15:52,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:15:52,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:15:52,642 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:15:52,643 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:15:52,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:15:52,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bcb5cd4/801a49ad2cc1405ba45c85ec4b43d829/FLAG426c5017d [2020-12-22 10:15:53,919 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:15:53,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:15:53,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bcb5cd4/801a49ad2cc1405ba45c85ec4b43d829/FLAG426c5017d [2020-12-22 10:15:54,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bcb5cd4/801a49ad2cc1405ba45c85ec4b43d829 [2020-12-22 10:15:54,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:15:54,293 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:15:54,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:15:54,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:15:54,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:15:54,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:15:54" (1/1) ... [2020-12-22 10:15:54,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44149d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:54, skipping insertion in model container [2020-12-22 10:15:54,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:15:54" (1/1) ... [2020-12-22 10:15:54,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:15:54,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:15:55,102 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.7.ufo.UNBOUNDED.pals+Problem12_label04.c[20572,20585] [2020-12-22 10:15:55,163 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.7.ufo.UNBOUNDED.pals+Problem12_label04.c[27390,27403] [2020-12-22 10:15:56,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:15:56,151 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:15:56,232 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.7.ufo.UNBOUNDED.pals+Problem12_label04.c[20572,20585] [2020-12-22 10:15:56,243 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.7.ufo.UNBOUNDED.pals+Problem12_label04.c[27390,27403] [2020-12-22 10:15:56,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:15:56,896 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:15:56,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56 WrapperNode [2020-12-22 10:15:56,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:15:56,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:15:56,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:15:56,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:15:56,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (1/1) ... [2020-12-22 10:15:57,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (1/1) ... [2020-12-22 10:15:57,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:15:57,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:15:57,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:15:57,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:15:57,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (1/1) ... [2020-12-22 10:15:57,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (1/1) ... [2020-12-22 10:15:57,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (1/1) ... [2020-12-22 10:15:57,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (1/1) ... [2020-12-22 10:15:57,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (1/1) ... [2020-12-22 10:15:57,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (1/1) ... [2020-12-22 10:15:57,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (1/1) ... [2020-12-22 10:15:58,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:15:58,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:15:58,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:15:58,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:15:58,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (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 10:15:58,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:15:58,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:15:58,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:15:58,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:16:03,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:16:03,825 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:16:03,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:16:03 BoogieIcfgContainer [2020-12-22 10:16:03,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:16:03,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:16:03,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:16:03,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:16:03,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:15:54" (1/3) ... [2020-12-22 10:16:03,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71525f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:16:03, skipping insertion in model container [2020-12-22 10:16:03,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:56" (2/3) ... [2020-12-22 10:16:03,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71525f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:16:03, skipping insertion in model container [2020-12-22 10:16:03,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:16:03" (3/3) ... [2020-12-22 10:16:03,839 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:16:03,846 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:16:03,852 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:16:03,874 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:16:03,909 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:16:03,909 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:16:03,909 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:16:03,909 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:16:03,910 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:16:03,910 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:16:03,910 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:16:03,910 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:16:03,946 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states. [2020-12-22 10:16:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:16:03,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:03,959 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] [2020-12-22 10:16:03,959 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:03,966 INFO L82 PathProgramCache]: Analyzing trace with hash -949343158, now seen corresponding path program 1 times [2020-12-22 10:16:03,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:03,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238432044] [2020-12-22 10:16:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:04,339 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 10:16:04,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238432044] [2020-12-22 10:16:04,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:04,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:16:04,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972757466] [2020-12-22 10:16:04,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:16:04,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:04,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:16:04,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:16:04,368 INFO L87 Difference]: Start difference. First operand 945 states. Second operand 2 states. [2020-12-22 10:16:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:04,461 INFO L93 Difference]: Finished difference Result 1832 states and 3466 transitions. [2020-12-22 10:16:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:16:04,463 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:16:04,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:04,492 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:16:04,493 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:16:04,504 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 10:16:04,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:16:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:16:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:16:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1655 transitions. [2020-12-22 10:16:04,632 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1655 transitions. Word has length 42 [2020-12-22 10:16:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:04,633 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1655 transitions. [2020-12-22 10:16:04,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:16:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1655 transitions. [2020-12-22 10:16:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:16:04,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:04,636 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] [2020-12-22 10:16:04,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:16:04,637 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:04,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:04,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2020-12-22 10:16:04,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:04,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941614446] [2020-12-22 10:16:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:04,784 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 10:16:04,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941614446] [2020-12-22 10:16:04,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:04,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:16:04,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879139261] [2020-12-22 10:16:04,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:16:04,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:04,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:16:04,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:16:04,791 INFO L87 Difference]: Start difference. First operand 879 states and 1655 transitions. Second operand 5 states. [2020-12-22 10:16:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:05,017 INFO L93 Difference]: Finished difference Result 952 states and 1769 transitions. [2020-12-22 10:16:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:16:05,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:16:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:05,024 INFO L225 Difference]: With dead ends: 952 [2020-12-22 10:16:05,024 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:16:05,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:16:05,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:16:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:16:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:16:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1605 transitions. [2020-12-22 10:16:05,051 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1605 transitions. Word has length 42 [2020-12-22 10:16:05,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:05,051 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1605 transitions. [2020-12-22 10:16:05,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:16:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1605 transitions. [2020-12-22 10:16:05,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 10:16:05,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:05,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:05,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:16:05,055 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:05,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:05,056 INFO L82 PathProgramCache]: Analyzing trace with hash -313387553, now seen corresponding path program 1 times [2020-12-22 10:16:05,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:05,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657488595] [2020-12-22 10:16:05,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:16:05,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657488595] [2020-12-22 10:16:05,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:05,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:16:05,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328242855] [2020-12-22 10:16:05,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:05,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:05,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:05,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:05,241 INFO L87 Difference]: Start difference. First operand 879 states and 1605 transitions. Second operand 3 states. [2020-12-22 10:16:11,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:11,903 INFO L93 Difference]: Finished difference Result 2383 states and 4478 transitions. [2020-12-22 10:16:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:11,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 10:16:11,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:11,915 INFO L225 Difference]: With dead ends: 2383 [2020-12-22 10:16:11,916 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:16:11,918 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 10:16:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:16:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:16:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:16:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2980 transitions. [2020-12-22 10:16:11,963 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2980 transitions. Word has length 61 [2020-12-22 10:16:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:11,964 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2980 transitions. [2020-12-22 10:16:11,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2980 transitions. [2020-12-22 10:16:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:11,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:11,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:11,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:16:11,969 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:11,970 INFO L82 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2020-12-22 10:16:11,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:11,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059726622] [2020-12-22 10:16:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:12,089 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 10:16:12,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059726622] [2020-12-22 10:16:12,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:12,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:12,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567230903] [2020-12-22 10:16:12,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:12,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:12,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:12,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:12,092 INFO L87 Difference]: Start difference. First operand 1630 states and 2980 transitions. Second operand 3 states. [2020-12-22 10:16:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:12,144 INFO L93 Difference]: Finished difference Result 1762 states and 3190 transitions. [2020-12-22 10:16:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:12,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:12,156 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 10:16:12,156 INFO L226 Difference]: Without dead ends: 1693 [2020-12-22 10:16:12,157 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 10:16:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2020-12-22 10:16:12,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1691. [2020-12-22 10:16:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1691 states. [2020-12-22 10:16:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 3078 transitions. [2020-12-22 10:16:12,210 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 3078 transitions. Word has length 91 [2020-12-22 10:16:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:12,210 INFO L481 AbstractCegarLoop]: Abstraction has 1691 states and 3078 transitions. [2020-12-22 10:16:12,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:12,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 3078 transitions. [2020-12-22 10:16:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:12,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:12,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:12,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:16:12,213 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:12,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2020-12-22 10:16:12,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:12,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970363946] [2020-12-22 10:16:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:12,396 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 10:16:12,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970363946] [2020-12-22 10:16:12,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:12,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:12,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419996993] [2020-12-22 10:16:12,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:12,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:12,399 INFO L87 Difference]: Start difference. First operand 1691 states and 3078 transitions. Second operand 3 states. [2020-12-22 10:16:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:12,449 INFO L93 Difference]: Finished difference Result 1939 states and 3474 transitions. [2020-12-22 10:16:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:12,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:12,461 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 10:16:12,462 INFO L226 Difference]: Without dead ends: 1809 [2020-12-22 10:16:12,463 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 10:16:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-12-22 10:16:12,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1807. [2020-12-22 10:16:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1807 states. [2020-12-22 10:16:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 3263 transitions. [2020-12-22 10:16:12,513 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 3263 transitions. Word has length 91 [2020-12-22 10:16:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:12,514 INFO L481 AbstractCegarLoop]: Abstraction has 1807 states and 3263 transitions. [2020-12-22 10:16:12,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 3263 transitions. [2020-12-22 10:16:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:12,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:12,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:12,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:16:12,516 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:12,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2020-12-22 10:16:12,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:12,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853197339] [2020-12-22 10:16:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:12,634 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 10:16:12,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853197339] [2020-12-22 10:16:12,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:12,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:12,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32220862] [2020-12-22 10:16:12,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:12,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:12,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:12,637 INFO L87 Difference]: Start difference. First operand 1807 states and 3263 transitions. Second operand 3 states. [2020-12-22 10:16:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:12,692 INFO L93 Difference]: Finished difference Result 2275 states and 4009 transitions. [2020-12-22 10:16:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:12,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:12,706 INFO L225 Difference]: With dead ends: 2275 [2020-12-22 10:16:12,706 INFO L226 Difference]: Without dead ends: 2029 [2020-12-22 10:16:12,708 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 10:16:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2020-12-22 10:16:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2027. [2020-12-22 10:16:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-12-22 10:16:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 3611 transitions. [2020-12-22 10:16:12,764 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 3611 transitions. Word has length 91 [2020-12-22 10:16:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:12,765 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 3611 transitions. [2020-12-22 10:16:12,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:12,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 3611 transitions. [2020-12-22 10:16:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:12,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:12,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:12,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:16:12,767 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:12,768 INFO L82 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2020-12-22 10:16:12,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:12,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873350298] [2020-12-22 10:16:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:12,868 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 10:16:12,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873350298] [2020-12-22 10:16:12,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:12,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:12,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322054594] [2020-12-22 10:16:12,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:12,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:12,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:12,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:12,877 INFO L87 Difference]: Start difference. First operand 2027 states and 3611 transitions. Second operand 3 states. [2020-12-22 10:16:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:12,947 INFO L93 Difference]: Finished difference Result 2911 states and 5013 transitions. [2020-12-22 10:16:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:12,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:12,965 INFO L225 Difference]: With dead ends: 2911 [2020-12-22 10:16:12,965 INFO L226 Difference]: Without dead ends: 2445 [2020-12-22 10:16:12,968 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 10:16:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2020-12-22 10:16:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2443. [2020-12-22 10:16:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2020-12-22 10:16:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 4263 transitions. [2020-12-22 10:16:13,064 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 4263 transitions. Word has length 91 [2020-12-22 10:16:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:13,065 INFO L481 AbstractCegarLoop]: Abstraction has 2443 states and 4263 transitions. [2020-12-22 10:16:13,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 4263 transitions. [2020-12-22 10:16:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:13,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:13,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:13,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:16:13,068 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:13,069 INFO L82 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2020-12-22 10:16:13,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:13,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124009090] [2020-12-22 10:16:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:13,269 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 10:16:13,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124009090] [2020-12-22 10:16:13,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:13,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:13,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966520597] [2020-12-22 10:16:13,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:13,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:13,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:13,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:13,273 INFO L87 Difference]: Start difference. First operand 2443 states and 4263 transitions. Second operand 3 states. [2020-12-22 10:16:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:13,362 INFO L93 Difference]: Finished difference Result 4111 states and 6889 transitions. [2020-12-22 10:16:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:13,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:16:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:13,382 INFO L225 Difference]: With dead ends: 4111 [2020-12-22 10:16:13,382 INFO L226 Difference]: Without dead ends: 3229 [2020-12-22 10:16:13,389 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 10:16:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2020-12-22 10:16:13,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3227. [2020-12-22 10:16:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3227 states. [2020-12-22 10:16:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 5479 transitions. [2020-12-22 10:16:13,504 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 5479 transitions. Word has length 91 [2020-12-22 10:16:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:13,504 INFO L481 AbstractCegarLoop]: Abstraction has 3227 states and 5479 transitions. [2020-12-22 10:16:13,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 5479 transitions. [2020-12-22 10:16:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:16:13,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:13,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:13,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:16:13,506 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2020-12-22 10:16:13,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:13,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585025118] [2020-12-22 10:16:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:13,689 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 10:16:13,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585025118] [2020-12-22 10:16:13,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:13,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:13,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114948074] [2020-12-22 10:16:13,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:13,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:13,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:13,693 INFO L87 Difference]: Start difference. First operand 3227 states and 5479 transitions. Second operand 9 states. [2020-12-22 10:16:15,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:15,043 INFO L93 Difference]: Finished difference Result 26551 states and 42005 transitions. [2020-12-22 10:16:15,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:16:15,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:16:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:15,187 INFO L225 Difference]: With dead ends: 26551 [2020-12-22 10:16:15,188 INFO L226 Difference]: Without dead ends: 24885 [2020-12-22 10:16:15,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:16:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24885 states. [2020-12-22 10:16:15,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24885 to 4891. [2020-12-22 10:16:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4891 states. [2020-12-22 10:16:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 8023 transitions. [2020-12-22 10:16:15,717 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 8023 transitions. Word has length 91 [2020-12-22 10:16:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:15,718 INFO L481 AbstractCegarLoop]: Abstraction has 4891 states and 8023 transitions. [2020-12-22 10:16:15,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 8023 transitions. [2020-12-22 10:16:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:16:15,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:15,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:15,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:16:15,720 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2020-12-22 10:16:15,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:15,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647853892] [2020-12-22 10:16:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:15,829 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 10:16:15,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647853892] [2020-12-22 10:16:15,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:15,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:15,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738228962] [2020-12-22 10:16:15,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:15,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:15,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:15,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:15,834 INFO L87 Difference]: Start difference. First operand 4891 states and 8023 transitions. Second operand 3 states. [2020-12-22 10:16:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:16,328 INFO L93 Difference]: Finished difference Result 11199 states and 17721 transitions. [2020-12-22 10:16:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:16,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:16:16,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:16,355 INFO L225 Difference]: With dead ends: 11199 [2020-12-22 10:16:16,356 INFO L226 Difference]: Without dead ends: 7869 [2020-12-22 10:16:16,363 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 10:16:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2020-12-22 10:16:16,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 7803. [2020-12-22 10:16:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:16:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 12343 transitions. [2020-12-22 10:16:16,841 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 12343 transitions. Word has length 93 [2020-12-22 10:16:16,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:16,842 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 12343 transitions. [2020-12-22 10:16:16,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 12343 transitions. [2020-12-22 10:16:16,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:16:16,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:16,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:16,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:16:16,844 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:16,845 INFO L82 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2020-12-22 10:16:16,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:16,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677117467] [2020-12-22 10:16:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:17,221 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 10:16:17,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677117467] [2020-12-22 10:16:17,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:17,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:17,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24142905] [2020-12-22 10:16:17,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:17,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:17,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:17,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:17,224 INFO L87 Difference]: Start difference. First operand 7803 states and 12343 transitions. Second operand 9 states. [2020-12-22 10:16:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:18,116 INFO L93 Difference]: Finished difference Result 14047 states and 21817 transitions. [2020-12-22 10:16:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:18,117 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:16:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:18,135 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 10:16:18,135 INFO L226 Difference]: Without dead ends: 7805 [2020-12-22 10:16:18,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:16:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-12-22 10:16:18,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2020-12-22 10:16:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:16:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 12279 transitions. [2020-12-22 10:16:18,584 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 12279 transitions. Word has length 93 [2020-12-22 10:16:18,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:18,585 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 12279 transitions. [2020-12-22 10:16:18,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:18,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 12279 transitions. [2020-12-22 10:16:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:16:18,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:18,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:18,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:16:18,587 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2020-12-22 10:16:18,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:18,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412579655] [2020-12-22 10:16:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:18,781 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 10:16:18,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412579655] [2020-12-22 10:16:18,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:18,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:18,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680943702] [2020-12-22 10:16:18,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:18,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:18,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:18,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:18,783 INFO L87 Difference]: Start difference. First operand 7803 states and 12279 transitions. Second operand 3 states. [2020-12-22 10:16:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:19,432 INFO L93 Difference]: Finished difference Result 19519 states and 29817 transitions. [2020-12-22 10:16:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:19,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:16:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:19,463 INFO L225 Difference]: With dead ends: 19519 [2020-12-22 10:16:19,463 INFO L226 Difference]: Without dead ends: 13277 [2020-12-22 10:16:19,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2020-12-22 10:16:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13275. [2020-12-22 10:16:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13275 states. [2020-12-22 10:16:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13275 states to 13275 states and 20279 transitions. [2020-12-22 10:16:20,233 INFO L78 Accepts]: Start accepts. Automaton has 13275 states and 20279 transitions. Word has length 93 [2020-12-22 10:16:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:20,233 INFO L481 AbstractCegarLoop]: Abstraction has 13275 states and 20279 transitions. [2020-12-22 10:16:20,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 13275 states and 20279 transitions. [2020-12-22 10:16:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:16:20,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:20,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:20,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:16:20,235 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:20,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2020-12-22 10:16:20,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:20,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578155985] [2020-12-22 10:16:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:20,369 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 10:16:20,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578155985] [2020-12-22 10:16:20,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:20,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:16:20,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411245207] [2020-12-22 10:16:20,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:16:20,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:20,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:16:20,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:16:20,372 INFO L87 Difference]: Start difference. First operand 13275 states and 20279 transitions. Second operand 8 states. [2020-12-22 10:16:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:22,088 INFO L93 Difference]: Finished difference Result 22017 states and 33063 transitions. [2020-12-22 10:16:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:16:22,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:16:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:22,144 INFO L225 Difference]: With dead ends: 22017 [2020-12-22 10:16:22,144 INFO L226 Difference]: Without dead ends: 22015 [2020-12-22 10:16:22,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22015 states. [2020-12-22 10:16:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22015 to 13659. [2020-12-22 10:16:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13659 states. [2020-12-22 10:16:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 20599 transitions. [2020-12-22 10:16:23,423 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 20599 transitions. Word has length 94 [2020-12-22 10:16:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:23,423 INFO L481 AbstractCegarLoop]: Abstraction has 13659 states and 20599 transitions. [2020-12-22 10:16:23,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:16:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 20599 transitions. [2020-12-22 10:16:23,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:16:23,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:23,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:23,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:16:23,427 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:23,427 INFO L82 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2020-12-22 10:16:23,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:23,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451689162] [2020-12-22 10:16:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:23,498 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 10:16:23,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451689162] [2020-12-22 10:16:23,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:23,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:16:23,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509275717] [2020-12-22 10:16:23,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:16:23,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:23,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:16:23,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:16:23,501 INFO L87 Difference]: Start difference. First operand 13659 states and 20599 transitions. Second operand 3 states. [2020-12-22 10:16:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:24,779 INFO L93 Difference]: Finished difference Result 25954 states and 38781 transitions. [2020-12-22 10:16:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:16:24,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:16:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:24,824 INFO L225 Difference]: With dead ends: 25954 [2020-12-22 10:16:24,824 INFO L226 Difference]: Without dead ends: 19295 [2020-12-22 10:16:24,837 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 10:16:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19295 states. [2020-12-22 10:16:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19295 to 19293. [2020-12-22 10:16:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19293 states. [2020-12-22 10:16:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19293 states to 19293 states and 28729 transitions. [2020-12-22 10:16:26,386 INFO L78 Accepts]: Start accepts. Automaton has 19293 states and 28729 transitions. Word has length 95 [2020-12-22 10:16:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:26,386 INFO L481 AbstractCegarLoop]: Abstraction has 19293 states and 28729 transitions. [2020-12-22 10:16:26,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:16:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 19293 states and 28729 transitions. [2020-12-22 10:16:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:26,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:26,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:26,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:16:26,400 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash 388249298, now seen corresponding path program 1 times [2020-12-22 10:16:26,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:26,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449165267] [2020-12-22 10:16:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:16:26,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449165267] [2020-12-22 10:16:26,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:26,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:26,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683616481] [2020-12-22 10:16:26,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:26,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:26,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:26,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:26,594 INFO L87 Difference]: Start difference. First operand 19293 states and 28729 transitions. Second operand 9 states. [2020-12-22 10:16:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:33,029 INFO L93 Difference]: Finished difference Result 146861 states and 214593 transitions. [2020-12-22 10:16:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:33,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:33,510 INFO L225 Difference]: With dead ends: 146861 [2020-12-22 10:16:33,510 INFO L226 Difference]: Without dead ends: 129131 [2020-12-22 10:16:33,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129131 states. [2020-12-22 10:16:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129131 to 37021. [2020-12-22 10:16:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37021 states. [2020-12-22 10:16:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37021 states to 37021 states and 54393 transitions. [2020-12-22 10:16:37,318 INFO L78 Accepts]: Start accepts. Automaton has 37021 states and 54393 transitions. Word has length 129 [2020-12-22 10:16:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:37,318 INFO L481 AbstractCegarLoop]: Abstraction has 37021 states and 54393 transitions. [2020-12-22 10:16:37,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 37021 states and 54393 transitions. [2020-12-22 10:16:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:37,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:37,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:37,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:16:37,338 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:37,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1380533518, now seen corresponding path program 1 times [2020-12-22 10:16:37,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:37,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217384629] [2020-12-22 10:16:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:16:37,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217384629] [2020-12-22 10:16:37,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:37,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:37,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699223257] [2020-12-22 10:16:37,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:37,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:37,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:37,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:37,554 INFO L87 Difference]: Start difference. First operand 37021 states and 54393 transitions. Second operand 9 states. [2020-12-22 10:16:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:46,008 INFO L93 Difference]: Finished difference Result 164589 states and 240257 transitions. [2020-12-22 10:16:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:46,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:46,547 INFO L225 Difference]: With dead ends: 164589 [2020-12-22 10:16:46,547 INFO L226 Difference]: Without dead ends: 146859 [2020-12-22 10:16:46,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:46,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146859 states. [2020-12-22 10:16:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146859 to 63645. [2020-12-22 10:16:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63645 states. [2020-12-22 10:16:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63645 states to 63645 states and 92729 transitions. [2020-12-22 10:16:51,324 INFO L78 Accepts]: Start accepts. Automaton has 63645 states and 92729 transitions. Word has length 129 [2020-12-22 10:16:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:51,324 INFO L481 AbstractCegarLoop]: Abstraction has 63645 states and 92729 transitions. [2020-12-22 10:16:51,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 63645 states and 92729 transitions. [2020-12-22 10:16:51,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:51,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:51,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:51,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:16:51,338 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:51,339 INFO L82 PathProgramCache]: Analyzing trace with hash -248893678, now seen corresponding path program 1 times [2020-12-22 10:16:51,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:51,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980726762] [2020-12-22 10:16:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:16:51,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980726762] [2020-12-22 10:16:51,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:51,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:51,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946949288] [2020-12-22 10:16:51,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:51,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:51,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:51,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:51,508 INFO L87 Difference]: Start difference. First operand 63645 states and 92729 transitions. Second operand 9 states. [2020-12-22 10:17:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:00,983 INFO L93 Difference]: Finished difference Result 182317 states and 265921 transitions. [2020-12-22 10:17:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:00,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:01,404 INFO L225 Difference]: With dead ends: 182317 [2020-12-22 10:17:01,404 INFO L226 Difference]: Without dead ends: 164587 [2020-12-22 10:17:01,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164587 states. [2020-12-22 10:17:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164587 to 81373. [2020-12-22 10:17:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81373 states. [2020-12-22 10:17:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81373 states to 81373 states and 118393 transitions. [2020-12-22 10:17:07,341 INFO L78 Accepts]: Start accepts. Automaton has 81373 states and 118393 transitions. Word has length 129 [2020-12-22 10:17:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:07,342 INFO L481 AbstractCegarLoop]: Abstraction has 81373 states and 118393 transitions. [2020-12-22 10:17:07,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 81373 states and 118393 transitions. [2020-12-22 10:17:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:07,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:07,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:07,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:17:07,357 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:07,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1484352718, now seen corresponding path program 1 times [2020-12-22 10:17:07,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:07,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121248619] [2020-12-22 10:17:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:17:07,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121248619] [2020-12-22 10:17:07,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:07,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:07,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837162290] [2020-12-22 10:17:07,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:07,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:07,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:07,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:07,575 INFO L87 Difference]: Start difference. First operand 81373 states and 118393 transitions. Second operand 9 states. [2020-12-22 10:17:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:18,944 INFO L93 Difference]: Finished difference Result 200045 states and 291585 transitions. [2020-12-22 10:17:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:18,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:19,383 INFO L225 Difference]: With dead ends: 200045 [2020-12-22 10:17:19,383 INFO L226 Difference]: Without dead ends: 182315 [2020-12-22 10:17:19,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182315 states. [2020-12-22 10:17:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182315 to 99101. [2020-12-22 10:17:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99101 states. [2020-12-22 10:17:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99101 states to 99101 states and 144057 transitions. [2020-12-22 10:17:26,800 INFO L78 Accepts]: Start accepts. Automaton has 99101 states and 144057 transitions. Word has length 129 [2020-12-22 10:17:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:26,801 INFO L481 AbstractCegarLoop]: Abstraction has 99101 states and 144057 transitions. [2020-12-22 10:17:26,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 99101 states and 144057 transitions. [2020-12-22 10:17:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:26,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:26,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:26,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:17:26,816 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:26,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:26,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1389619026, now seen corresponding path program 1 times [2020-12-22 10:17:26,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:26,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087478815] [2020-12-22 10:17:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:17:26,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087478815] [2020-12-22 10:17:26,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:26,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:26,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4468440] [2020-12-22 10:17:26,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:26,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:26,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:26,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:26,985 INFO L87 Difference]: Start difference. First operand 99101 states and 144057 transitions. Second operand 9 states. [2020-12-22 10:17:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:40,599 INFO L93 Difference]: Finished difference Result 217773 states and 317249 transitions. [2020-12-22 10:17:40,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:40,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:41,054 INFO L225 Difference]: With dead ends: 217773 [2020-12-22 10:17:41,055 INFO L226 Difference]: Without dead ends: 200043 [2020-12-22 10:17:41,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200043 states. [2020-12-22 10:17:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200043 to 116829. [2020-12-22 10:17:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116829 states. [2020-12-22 10:17:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116829 states to 116829 states and 169721 transitions. [2020-12-22 10:17:50,320 INFO L78 Accepts]: Start accepts. Automaton has 116829 states and 169721 transitions. Word has length 129 [2020-12-22 10:17:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:50,320 INFO L481 AbstractCegarLoop]: Abstraction has 116829 states and 169721 transitions. [2020-12-22 10:17:50,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 116829 states and 169721 transitions. [2020-12-22 10:17:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:50,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:50,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:50,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:17:50,334 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:50,334 INFO L82 PathProgramCache]: Analyzing trace with hash 375573628, now seen corresponding path program 1 times [2020-12-22 10:17:50,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:50,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13030160] [2020-12-22 10:17:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:17:50,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13030160] [2020-12-22 10:17:50,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:50,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:50,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157348789] [2020-12-22 10:17:50,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:50,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:50,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:50,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:50,756 INFO L87 Difference]: Start difference. First operand 116829 states and 169721 transitions. Second operand 9 states. [2020-12-22 10:18:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:07,294 INFO L93 Difference]: Finished difference Result 235501 states and 342913 transitions. [2020-12-22 10:18:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:07,294 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:07,649 INFO L225 Difference]: With dead ends: 235501 [2020-12-22 10:18:07,650 INFO L226 Difference]: Without dead ends: 217771 [2020-12-22 10:18:07,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:18:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217771 states. [2020-12-22 10:18:19,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217771 to 134557. [2020-12-22 10:18:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134557 states. [2020-12-22 10:18:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134557 states to 134557 states and 195385 transitions. [2020-12-22 10:18:19,546 INFO L78 Accepts]: Start accepts. Automaton has 134557 states and 195385 transitions. Word has length 129 [2020-12-22 10:18:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:19,546 INFO L481 AbstractCegarLoop]: Abstraction has 134557 states and 195385 transitions. [2020-12-22 10:18:19,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 134557 states and 195385 transitions. [2020-12-22 10:18:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:18:19,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:19,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:18:19,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:18:19,573 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:19,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1903775542, now seen corresponding path program 1 times [2020-12-22 10:18:19,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:19,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029547557] [2020-12-22 10:18:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:19,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029547557] [2020-12-22 10:18:19,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:19,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:19,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139400619] [2020-12-22 10:18:19,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:19,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:19,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:19,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:19,668 INFO L87 Difference]: Start difference. First operand 134557 states and 195385 transitions. Second operand 3 states. [2020-12-22 10:18:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:27,682 INFO L93 Difference]: Finished difference Result 226758 states and 329832 transitions. [2020-12-22 10:18:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:27,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 10:18:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:27,811 INFO L225 Difference]: With dead ends: 226758 [2020-12-22 10:18:27,812 INFO L226 Difference]: Without dead ends: 93764 [2020-12-22 10:18:27,879 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 10:18:27,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93764 states. [2020-12-22 10:18:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93764 to 93762. [2020-12-22 10:18:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93762 states. [2020-12-22 10:18:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93762 states to 93762 states and 136357 transitions. [2020-12-22 10:18:35,611 INFO L78 Accepts]: Start accepts. Automaton has 93762 states and 136357 transitions. Word has length 131 [2020-12-22 10:18:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:35,612 INFO L481 AbstractCegarLoop]: Abstraction has 93762 states and 136357 transitions. [2020-12-22 10:18:35,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 93762 states and 136357 transitions. [2020-12-22 10:18:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:18:35,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:35,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:18:35,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:18:35,623 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:35,623 INFO L82 PathProgramCache]: Analyzing trace with hash -800734569, now seen corresponding path program 1 times [2020-12-22 10:18:35,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:35,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94179299] [2020-12-22 10:18:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:18:36,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94179299] [2020-12-22 10:18:36,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:36,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:36,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381637629] [2020-12-22 10:18:36,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:36,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:36,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:36,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:36,028 INFO L87 Difference]: Start difference. First operand 93762 states and 136357 transitions. Second operand 9 states. [2020-12-22 10:18:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:50,556 INFO L93 Difference]: Finished difference Result 179794 states and 261805 transitions. [2020-12-22 10:18:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:50,559 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-12-22 10:18:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:50,788 INFO L225 Difference]: With dead ends: 179794 [2020-12-22 10:18:50,788 INFO L226 Difference]: Without dead ends: 167504 [2020-12-22 10:18:50,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:18:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167504 states. [2020-12-22 10:19:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167504 to 106050. [2020-12-22 10:19:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106050 states. [2020-12-22 10:19:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106050 states to 106050 states and 154149 transitions. [2020-12-22 10:19:00,907 INFO L78 Accepts]: Start accepts. Automaton has 106050 states and 154149 transitions. Word has length 131 [2020-12-22 10:19:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:00,907 INFO L481 AbstractCegarLoop]: Abstraction has 106050 states and 154149 transitions. [2020-12-22 10:19:00,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 106050 states and 154149 transitions. [2020-12-22 10:19:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:19:00,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:00,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:00,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:19:00,922 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:00,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:00,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1473709455, now seen corresponding path program 1 times [2020-12-22 10:19:00,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:00,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031262250] [2020-12-22 10:19:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:00,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031262250] [2020-12-22 10:19:00,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:00,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:00,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711735125] [2020-12-22 10:19:00,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:19:00,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:00,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:19:00,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:19:01,000 INFO L87 Difference]: Start difference. First operand 106050 states and 154149 transitions. Second operand 3 states. [2020-12-22 10:19:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:06,098 INFO L93 Difference]: Finished difference Result 158278 states and 229767 transitions. [2020-12-22 10:19:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:19:06,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 10:19:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:06,157 INFO L225 Difference]: With dead ends: 158278 [2020-12-22 10:19:06,157 INFO L226 Difference]: Without dead ends: 53828 [2020-12-22 10:19:06,197 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 10:19:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53828 states. [2020-12-22 10:19:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53828 to 53826. [2020-12-22 10:19:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53826 states. [2020-12-22 10:19:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53826 states to 53826 states and 77989 transitions. [2020-12-22 10:19:10,962 INFO L78 Accepts]: Start accepts. Automaton has 53826 states and 77989 transitions. Word has length 132 [2020-12-22 10:19:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:10,962 INFO L481 AbstractCegarLoop]: Abstraction has 53826 states and 77989 transitions. [2020-12-22 10:19:10,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:19:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 53826 states and 77989 transitions. [2020-12-22 10:19:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:19:10,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:10,969 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:10,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:19:10,970 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:10,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1811184295, now seen corresponding path program 1 times [2020-12-22 10:19:10,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:10,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268864065] [2020-12-22 10:19:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:19:11,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268864065] [2020-12-22 10:19:11,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483297887] [2020-12-22 10:19:11,244 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 10:19:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:11,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:19:11,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:19:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:19:12,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:19:12,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 10:19:12,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143598533] [2020-12-22 10:19:12,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:19:12,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:12,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:19:12,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:19:12,104 INFO L87 Difference]: Start difference. First operand 53826 states and 77989 transitions. Second operand 12 states.