/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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:17:07,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:17:07,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:17:07,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:17:07,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:17:07,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:17:07,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:17:07,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:17:07,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:17:07,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:17:07,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:17:07,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:17:07,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:17:07,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:17:07,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:17:07,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:17:07,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:17:07,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:17:07,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:17:07,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:17:07,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:17:07,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:17:07,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:17:07,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:17:07,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:17:07,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:17:07,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:17:07,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:17:07,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:17:07,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:17:07,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:17:07,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:17:07,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:17:07,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:17:07,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:17:07,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:17:07,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:17:07,337 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:17:07,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:17:07,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:17:07,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:17:07,344 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:17:07,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:17:07,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:17:07,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:17:07,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:17:07,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:17:07,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:17:07,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:17:07,347 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:17:07,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:17:07,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:17:07,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:17:07,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:17:07,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:17:07,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:17:07,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:17:07,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:17:07,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:17:07,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:17:07,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:17:07,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:17:07,350 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:17:07,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:17:07,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:17:07,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:17:07,770 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:17:07,771 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:17:07,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:17:07,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c3425f8/ee3b1bce827c477c85f79e4a8bbf9e01/FLAG988d301b9 [2020-12-22 10:17:09,066 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:17:09,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:17:09,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c3425f8/ee3b1bce827c477c85f79e4a8bbf9e01/FLAG988d301b9 [2020-12-22 10:17:09,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c3425f8/ee3b1bce827c477c85f79e4a8bbf9e01 [2020-12-22 10:17:09,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:17:09,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:17:09,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:17:09,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:17:09,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:17:09,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:17:09" (1/1) ... [2020-12-22 10:17:09,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe52783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:09, skipping insertion in model container [2020-12-22 10:17:09,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:17:09" (1/1) ... [2020-12-22 10:17:09,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:17:09,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:17:10,037 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[20646,20659] [2020-12-22 10:17:10,111 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[25958,25971] [2020-12-22 10:17:11,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:17:11,108 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:17:11,236 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[20646,20659] [2020-12-22 10:17:11,261 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[25958,25971] [2020-12-22 10:17:11,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:17:11,904 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:17:11,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11 WrapperNode [2020-12-22 10:17:11,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:17:11,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:17:11,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:17:11,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:17:11,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (1/1) ... [2020-12-22 10:17:11,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (1/1) ... [2020-12-22 10:17:12,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:17:12,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:17:12,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:17:12,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:17:12,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (1/1) ... [2020-12-22 10:17:12,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (1/1) ... [2020-12-22 10:17:12,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (1/1) ... [2020-12-22 10:17:12,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (1/1) ... [2020-12-22 10:17:12,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (1/1) ... [2020-12-22 10:17:12,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (1/1) ... [2020-12-22 10:17:13,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (1/1) ... [2020-12-22 10:17:13,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:17:13,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:17:13,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:17:13,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:17:13,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (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 10:17:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:17:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:17:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:17:13,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:17:18,857 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:17:18,857 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:17:18,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:17:18 BoogieIcfgContainer [2020-12-22 10:17:18,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:17:18,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:17:18,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:17:18,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:17:18,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:17:09" (1/3) ... [2020-12-22 10:17:18,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d24100d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:17:18, skipping insertion in model container [2020-12-22 10:17:18,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:17:11" (2/3) ... [2020-12-22 10:17:18,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d24100d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:17:18, skipping insertion in model container [2020-12-22 10:17:18,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:17:18" (3/3) ... [2020-12-22 10:17:18,872 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:17:18,879 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:17:18,886 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:17:18,905 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:17:18,939 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:17:18,940 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:17:18,940 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:17:18,940 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:17:18,940 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:17:18,940 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:17:18,941 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:17:18,941 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:17:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states. [2020-12-22 10:17:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:17:18,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:18,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:17:18,988 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:18,994 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:17:19,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:19,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040863483] [2020-12-22 10:17:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:17:19,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040863483] [2020-12-22 10:17:19,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:19,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:17:19,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500542864] [2020-12-22 10:17:19,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:17:19,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:19,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:17:19,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:17:19,297 INFO L87 Difference]: Start difference. First operand 943 states. Second operand 2 states. [2020-12-22 10:17:19,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:19,394 INFO L93 Difference]: Finished difference Result 1828 states and 3460 transitions. [2020-12-22 10:17:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:17:19,396 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:17:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:19,443 INFO L225 Difference]: With dead ends: 1828 [2020-12-22 10:17:19,443 INFO L226 Difference]: Without dead ends: 877 [2020-12-22 10:17:19,454 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 10:17:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-12-22 10:17:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2020-12-22 10:17:19,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-12-22 10:17:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1652 transitions. [2020-12-22 10:17:19,576 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1652 transitions. Word has length 42 [2020-12-22 10:17:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:19,576 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1652 transitions. [2020-12-22 10:17:19,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:17:19,577 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1652 transitions. [2020-12-22 10:17:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:17:19,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:19,579 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 10:17:19,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:17:19,580 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:17:19,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:19,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719841790] [2020-12-22 10:17:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:19,819 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 10:17:19,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719841790] [2020-12-22 10:17:19,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:19,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:17:19,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922423568] [2020-12-22 10:17:19,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:17:19,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:19,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:17:19,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:17:19,825 INFO L87 Difference]: Start difference. First operand 877 states and 1652 transitions. Second operand 5 states. [2020-12-22 10:17:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:20,071 INFO L93 Difference]: Finished difference Result 948 states and 1763 transitions. [2020-12-22 10:17:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:17:20,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:17:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:20,079 INFO L225 Difference]: With dead ends: 948 [2020-12-22 10:17:20,079 INFO L226 Difference]: Without dead ends: 877 [2020-12-22 10:17:20,080 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 10:17:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-12-22 10:17:20,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2020-12-22 10:17:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-12-22 10:17:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1602 transitions. [2020-12-22 10:17:20,141 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1602 transitions. Word has length 42 [2020-12-22 10:17:20,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:20,142 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1602 transitions. [2020-12-22 10:17:20,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:17:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1602 transitions. [2020-12-22 10:17:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:17:20,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:20,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:17:20,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:17:20,155 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1144208085, now seen corresponding path program 1 times [2020-12-22 10:17:20,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:20,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794815584] [2020-12-22 10:17:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:20,325 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 10:17:20,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794815584] [2020-12-22 10:17:20,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:20,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:20,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443423361] [2020-12-22 10:17:20,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:17:20,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:20,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:17:20,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:17:20,328 INFO L87 Difference]: Start difference. First operand 877 states and 1602 transitions. Second operand 4 states. [2020-12-22 10:17:31,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:31,246 INFO L93 Difference]: Finished difference Result 3132 states and 5911 transitions. [2020-12-22 10:17:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:17:31,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 10:17:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:31,264 INFO L225 Difference]: With dead ends: 3132 [2020-12-22 10:17:31,265 INFO L226 Difference]: Without dead ends: 2379 [2020-12-22 10:17:31,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:17:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-12-22 10:17:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2379. [2020-12-22 10:17:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2379 states. [2020-12-22 10:17:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3716 transitions. [2020-12-22 10:17:31,327 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 3716 transitions. Word has length 48 [2020-12-22 10:17:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:31,328 INFO L481 AbstractCegarLoop]: Abstraction has 2379 states and 3716 transitions. [2020-12-22 10:17:31,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:17:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 3716 transitions. [2020-12-22 10:17:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:31,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:31,330 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 10:17:31,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:17:31,331 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:31,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:17:31,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:31,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682369513] [2020-12-22 10:17:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:31,444 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 10:17:31,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682369513] [2020-12-22 10:17:31,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:31,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:31,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179631256] [2020-12-22 10:17:31,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:31,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:31,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:31,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:31,451 INFO L87 Difference]: Start difference. First operand 2379 states and 3716 transitions. Second operand 3 states. [2020-12-22 10:17:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:31,503 INFO L93 Difference]: Finished difference Result 2507 states and 3920 transitions. [2020-12-22 10:17:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:31,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:31,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:31,519 INFO L225 Difference]: With dead ends: 2507 [2020-12-22 10:17:31,519 INFO L226 Difference]: Without dead ends: 2440 [2020-12-22 10:17:31,521 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 10:17:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2020-12-22 10:17:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2438. [2020-12-22 10:17:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-12-22 10:17:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 3811 transitions. [2020-12-22 10:17:31,589 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 3811 transitions. Word has length 91 [2020-12-22 10:17:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:31,592 INFO L481 AbstractCegarLoop]: Abstraction has 2438 states and 3811 transitions. [2020-12-22 10:17:31,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 3811 transitions. [2020-12-22 10:17:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:31,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:31,595 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 10:17:31,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:17:31,596 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:31,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:17:31,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:31,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458570885] [2020-12-22 10:17:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:31,740 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 10:17:31,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458570885] [2020-12-22 10:17:31,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:31,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:31,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695512040] [2020-12-22 10:17:31,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:31,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:31,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:31,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:31,743 INFO L87 Difference]: Start difference. First operand 2438 states and 3811 transitions. Second operand 3 states. [2020-12-22 10:17:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:31,799 INFO L93 Difference]: Finished difference Result 2678 states and 4195 transitions. [2020-12-22 10:17:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:31,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:31,817 INFO L225 Difference]: With dead ends: 2678 [2020-12-22 10:17:31,817 INFO L226 Difference]: Without dead ends: 2552 [2020-12-22 10:17:31,819 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 10:17:31,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2020-12-22 10:17:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2550. [2020-12-22 10:17:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2550 states. [2020-12-22 10:17:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3990 transitions. [2020-12-22 10:17:31,898 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3990 transitions. Word has length 91 [2020-12-22 10:17:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:31,898 INFO L481 AbstractCegarLoop]: Abstraction has 2550 states and 3990 transitions. [2020-12-22 10:17:31,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3990 transitions. [2020-12-22 10:17:31,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:31,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:31,900 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 10:17:31,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:17:31,901 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:17:31,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:31,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041260713] [2020-12-22 10:17:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:32,139 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 10:17:32,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041260713] [2020-12-22 10:17:32,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:32,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:32,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627817377] [2020-12-22 10:17:32,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:32,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:32,143 INFO L87 Difference]: Start difference. First operand 2550 states and 3990 transitions. Second operand 3 states. [2020-12-22 10:17:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:32,202 INFO L93 Difference]: Finished difference Result 3002 states and 4712 transitions. [2020-12-22 10:17:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:32,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:32,222 INFO L225 Difference]: With dead ends: 3002 [2020-12-22 10:17:32,222 INFO L226 Difference]: Without dead ends: 2764 [2020-12-22 10:17:32,224 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 10:17:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2020-12-22 10:17:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2762. [2020-12-22 10:17:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2762 states. [2020-12-22 10:17:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 4326 transitions. [2020-12-22 10:17:32,305 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 4326 transitions. Word has length 91 [2020-12-22 10:17:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:32,307 INFO L481 AbstractCegarLoop]: Abstraction has 2762 states and 4326 transitions. [2020-12-22 10:17:32,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 4326 transitions. [2020-12-22 10:17:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:32,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:32,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:32,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:17:32,318 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:32,321 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:17:32,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:32,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021724105] [2020-12-22 10:17:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:32,448 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 10:17:32,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021724105] [2020-12-22 10:17:32,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:32,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:32,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160266073] [2020-12-22 10:17:32,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:32,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:32,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:32,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:32,452 INFO L87 Difference]: Start difference. First operand 2762 states and 4326 transitions. Second operand 3 states. [2020-12-22 10:17:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:32,517 INFO L93 Difference]: Finished difference Result 3614 states and 5680 transitions. [2020-12-22 10:17:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:32,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:32,537 INFO L225 Difference]: With dead ends: 3614 [2020-12-22 10:17:32,537 INFO L226 Difference]: Without dead ends: 3164 [2020-12-22 10:17:32,544 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 10:17:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2020-12-22 10:17:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3162. [2020-12-22 10:17:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3162 states. [2020-12-22 10:17:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 4954 transitions. [2020-12-22 10:17:32,645 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 4954 transitions. Word has length 91 [2020-12-22 10:17:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:32,646 INFO L481 AbstractCegarLoop]: Abstraction has 3162 states and 4954 transitions. [2020-12-22 10:17:32,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:32,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 4954 transitions. [2020-12-22 10:17:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:32,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:32,648 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 10:17:32,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:17:32,649 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:17:32,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:32,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134086591] [2020-12-22 10:17:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:32,756 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 10:17:32,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134086591] [2020-12-22 10:17:32,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:32,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:32,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149491094] [2020-12-22 10:17:32,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:32,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:32,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:32,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:32,760 INFO L87 Difference]: Start difference. First operand 3162 states and 4954 transitions. Second operand 3 states. [2020-12-22 10:17:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:32,847 INFO L93 Difference]: Finished difference Result 4766 states and 7484 transitions. [2020-12-22 10:17:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:32,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:17:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:32,868 INFO L225 Difference]: With dead ends: 4766 [2020-12-22 10:17:32,868 INFO L226 Difference]: Without dead ends: 3916 [2020-12-22 10:17:32,872 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 10:17:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2020-12-22 10:17:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3914. [2020-12-22 10:17:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3914 states. [2020-12-22 10:17:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 6122 transitions. [2020-12-22 10:17:33,025 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 6122 transitions. Word has length 91 [2020-12-22 10:17:33,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:33,025 INFO L481 AbstractCegarLoop]: Abstraction has 3914 states and 6122 transitions. [2020-12-22 10:17:33,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 6122 transitions. [2020-12-22 10:17:33,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:17:33,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:33,027 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 10:17:33,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:17:33,027 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:17:33,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:33,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302794281] [2020-12-22 10:17:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:33,207 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 10:17:33,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302794281] [2020-12-22 10:17:33,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:33,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:33,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165762014] [2020-12-22 10:17:33,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:33,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:33,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:33,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:33,210 INFO L87 Difference]: Start difference. First operand 3914 states and 6122 transitions. Second operand 9 states. [2020-12-22 10:17:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:34,555 INFO L93 Difference]: Finished difference Result 26342 states and 41304 transitions. [2020-12-22 10:17:34,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:17:34,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:17:34,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:34,644 INFO L225 Difference]: With dead ends: 26342 [2020-12-22 10:17:34,645 INFO L226 Difference]: Without dead ends: 24740 [2020-12-22 10:17:34,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:17:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24740 states. [2020-12-22 10:17:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24740 to 5514. [2020-12-22 10:17:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5514 states. [2020-12-22 10:17:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 8570 transitions. [2020-12-22 10:17:35,182 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 8570 transitions. Word has length 91 [2020-12-22 10:17:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:35,182 INFO L481 AbstractCegarLoop]: Abstraction has 5514 states and 8570 transitions. [2020-12-22 10:17:35,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 8570 transitions. [2020-12-22 10:17:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:35,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:35,185 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 10:17:35,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:17:35,185 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:35,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:35,186 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:17:35,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:35,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824456394] [2020-12-22 10:17:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:35,319 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 10:17:35,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824456394] [2020-12-22 10:17:35,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:35,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:35,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422490005] [2020-12-22 10:17:35,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:35,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:35,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:35,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:35,324 INFO L87 Difference]: Start difference. First operand 5514 states and 8570 transitions. Second operand 3 states. [2020-12-22 10:17:35,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:35,610 INFO L93 Difference]: Finished difference Result 10240 states and 15886 transitions. [2020-12-22 10:17:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:35,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:17:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:35,628 INFO L225 Difference]: With dead ends: 10240 [2020-12-22 10:17:35,629 INFO L226 Difference]: Without dead ends: 7038 [2020-12-22 10:17:35,635 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 10:17:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2020-12-22 10:17:35,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 7036. [2020-12-22 10:17:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7036 states. [2020-12-22 10:17:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 10876 transitions. [2020-12-22 10:17:35,987 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 10876 transitions. Word has length 93 [2020-12-22 10:17:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:35,988 INFO L481 AbstractCegarLoop]: Abstraction has 7036 states and 10876 transitions. [2020-12-22 10:17:35,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 10876 transitions. [2020-12-22 10:17:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:35,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:35,996 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 10:17:35,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:17:35,996 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:35,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:35,997 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:17:35,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:35,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397082338] [2020-12-22 10:17:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:36,461 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 10:17:36,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397082338] [2020-12-22 10:17:36,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:36,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:36,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612370990] [2020-12-22 10:17:36,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:36,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:36,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:36,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:36,465 INFO L87 Difference]: Start difference. First operand 7036 states and 10876 transitions. Second operand 9 states. [2020-12-22 10:17:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:37,238 INFO L93 Difference]: Finished difference Result 11760 states and 18142 transitions. [2020-12-22 10:17:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:37,239 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:17:37,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:37,254 INFO L225 Difference]: With dead ends: 11760 [2020-12-22 10:17:37,254 INFO L226 Difference]: Without dead ends: 7038 [2020-12-22 10:17:37,261 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 10:17:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2020-12-22 10:17:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 7036. [2020-12-22 10:17:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7036 states. [2020-12-22 10:17:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 10828 transitions. [2020-12-22 10:17:37,610 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 10828 transitions. Word has length 93 [2020-12-22 10:17:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:37,611 INFO L481 AbstractCegarLoop]: Abstraction has 7036 states and 10828 transitions. [2020-12-22 10:17:37,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 10828 transitions. [2020-12-22 10:17:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:37,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:37,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:37,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:17:37,613 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:37,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:17:37,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:37,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103753311] [2020-12-22 10:17:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:37,691 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 10:17:37,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103753311] [2020-12-22 10:17:37,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:37,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:37,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168126636] [2020-12-22 10:17:37,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:37,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:37,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:37,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:37,693 INFO L87 Difference]: Start difference. First operand 7036 states and 10828 transitions. Second operand 3 states. [2020-12-22 10:17:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:38,150 INFO L93 Difference]: Finished difference Result 15904 states and 24302 transitions. [2020-12-22 10:17:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:38,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:17:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:38,171 INFO L225 Difference]: With dead ends: 15904 [2020-12-22 10:17:38,172 INFO L226 Difference]: Without dead ends: 11182 [2020-12-22 10:17:38,180 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 10:17:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11182 states. [2020-12-22 10:17:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11182 to 11180. [2020-12-22 10:17:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11180 states. [2020-12-22 10:17:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 16988 transitions. [2020-12-22 10:17:38,925 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 16988 transitions. Word has length 93 [2020-12-22 10:17:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:38,929 INFO L481 AbstractCegarLoop]: Abstraction has 11180 states and 16988 transitions. [2020-12-22 10:17:38,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:38,929 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 16988 transitions. [2020-12-22 10:17:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:17:38,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:38,931 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 10:17:38,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:17:38,931 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:38,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:38,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:17:38,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:38,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341840258] [2020-12-22 10:17:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:39,011 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 10:17:39,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341840258] [2020-12-22 10:17:39,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:39,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:39,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50423063] [2020-12-22 10:17:39,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:39,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:39,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:39,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:39,020 INFO L87 Difference]: Start difference. First operand 11180 states and 16988 transitions. Second operand 3 states. [2020-12-22 10:17:39,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:39,870 INFO L93 Difference]: Finished difference Result 27760 states and 41822 transitions. [2020-12-22 10:17:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:39,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:17:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:39,901 INFO L225 Difference]: With dead ends: 27760 [2020-12-22 10:17:39,901 INFO L226 Difference]: Without dead ends: 18894 [2020-12-22 10:17:39,917 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 10:17:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18894 states. [2020-12-22 10:17:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18894 to 18892. [2020-12-22 10:17:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:17:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 28252 transitions. [2020-12-22 10:17:41,139 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 28252 transitions. Word has length 93 [2020-12-22 10:17:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:41,139 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 28252 transitions. [2020-12-22 10:17:41,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:17:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 28252 transitions. [2020-12-22 10:17:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:17:41,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:41,141 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 10:17:41,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:17:41,141 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:41,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:41,142 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:17:41,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:41,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264122248] [2020-12-22 10:17:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:41,240 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 10:17:41,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264122248] [2020-12-22 10:17:41,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:41,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:17:41,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447409667] [2020-12-22 10:17:41,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:17:41,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:17:41,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:17:41,242 INFO L87 Difference]: Start difference. First operand 18892 states and 28252 transitions. Second operand 6 states. [2020-12-22 10:17:42,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:42,926 INFO L93 Difference]: Finished difference Result 35470 states and 52893 transitions. [2020-12-22 10:17:42,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:17:42,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:17:42,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:42,953 INFO L225 Difference]: With dead ends: 35470 [2020-12-22 10:17:42,954 INFO L226 Difference]: Without dead ends: 18892 [2020-12-22 10:17:42,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2020-12-22 10:17:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18892. [2020-12-22 10:17:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:17:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 27996 transitions. [2020-12-22 10:17:44,052 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 27996 transitions. Word has length 94 [2020-12-22 10:17:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:44,052 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 27996 transitions. [2020-12-22 10:17:44,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:17:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 27996 transitions. [2020-12-22 10:17:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:17:44,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:44,054 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:44,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:17:44,054 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:44,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:17:44,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:44,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178231989] [2020-12-22 10:17:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:44,150 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 10:17:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178231989] [2020-12-22 10:17:44,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:44,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:17:44,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011649271] [2020-12-22 10:17:44,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:17:44,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:44,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:17:44,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:17:44,153 INFO L87 Difference]: Start difference. First operand 18892 states and 27996 transitions. Second operand 6 states. [2020-12-22 10:17:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:45,522 INFO L93 Difference]: Finished difference Result 35470 states and 52381 transitions. [2020-12-22 10:17:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:17:45,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:17:45,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:45,539 INFO L225 Difference]: With dead ends: 35470 [2020-12-22 10:17:45,539 INFO L226 Difference]: Without dead ends: 18892 [2020-12-22 10:17:45,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2020-12-22 10:17:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18892. [2020-12-22 10:17:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:17:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 27804 transitions. [2020-12-22 10:17:46,677 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 27804 transitions. Word has length 94 [2020-12-22 10:17:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:46,677 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 27804 transitions. [2020-12-22 10:17:46,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:17:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 27804 transitions. [2020-12-22 10:17:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:17:46,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:46,678 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 10:17:46,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:17:46,678 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:46,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:17:46,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:46,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241374422] [2020-12-22 10:17:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:46,797 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 10:17:46,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241374422] [2020-12-22 10:17:46,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:46,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:17:46,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108896769] [2020-12-22 10:17:46,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:17:46,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:46,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:17:46,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:17:46,799 INFO L87 Difference]: Start difference. First operand 18892 states and 27804 transitions. Second operand 8 states. [2020-12-22 10:17:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:49,108 INFO L93 Difference]: Finished difference Result 33135 states and 48198 transitions. [2020-12-22 10:17:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:17:49,108 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:17:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:49,137 INFO L225 Difference]: With dead ends: 33135 [2020-12-22 10:17:49,137 INFO L226 Difference]: Without dead ends: 33133 [2020-12-22 10:17:49,144 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 10:17:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33133 states. [2020-12-22 10:17:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33133 to 19660. [2020-12-22 10:17:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19660 states. [2020-12-22 10:17:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19660 states to 19660 states and 28508 transitions. [2020-12-22 10:17:50,687 INFO L78 Accepts]: Start accepts. Automaton has 19660 states and 28508 transitions. Word has length 94 [2020-12-22 10:17:50,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:50,688 INFO L481 AbstractCegarLoop]: Abstraction has 19660 states and 28508 transitions. [2020-12-22 10:17:50,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:17:50,688 INFO L276 IsEmpty]: Start isEmpty. Operand 19660 states and 28508 transitions. [2020-12-22 10:17:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 10:17:50,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:50,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:17:50,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:17:50,693 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:50,694 INFO L82 PathProgramCache]: Analyzing trace with hash -694189319, now seen corresponding path program 1 times [2020-12-22 10:17:50,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:50,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708760827] [2020-12-22 10:17:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:17:50,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708760827] [2020-12-22 10:17:50,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:50,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:50,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267982558] [2020-12-22 10:17:50,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:17:50,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:50,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:17:50,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:17:50,880 INFO L87 Difference]: Start difference. First operand 19660 states and 28508 transitions. Second operand 4 states. [2020-12-22 10:17:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:59,724 INFO L93 Difference]: Finished difference Result 23456 states and 34872 transitions. [2020-12-22 10:17:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:17:59,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 10:17:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:59,743 INFO L225 Difference]: With dead ends: 23456 [2020-12-22 10:17:59,743 INFO L226 Difference]: Without dead ends: 21164 [2020-12-22 10:17:59,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:17:59,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21164 states. [2020-12-22 10:18:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21164 to 21162. [2020-12-22 10:18:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21162 states. [2020-12-22 10:18:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21162 states to 21162 states and 30096 transitions. [2020-12-22 10:18:01,154 INFO L78 Accepts]: Start accepts. Automaton has 21162 states and 30096 transitions. Word has length 119 [2020-12-22 10:18:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:01,154 INFO L481 AbstractCegarLoop]: Abstraction has 21162 states and 30096 transitions. [2020-12-22 10:18:01,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:18:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 21162 states and 30096 transitions. [2020-12-22 10:18:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:01,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:01,166 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 10:18:01,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:18:01,167 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:01,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1704205326, now seen corresponding path program 1 times [2020-12-22 10:18:01,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:01,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741468186] [2020-12-22 10:18:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:18:01,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741468186] [2020-12-22 10:18:01,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:01,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:01,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498860541] [2020-12-22 10:18:01,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:01,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:01,337 INFO L87 Difference]: Start difference. First operand 21162 states and 30096 transitions. Second operand 9 states. [2020-12-22 10:18:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:09,455 INFO L93 Difference]: Finished difference Result 145978 states and 209080 transitions. [2020-12-22 10:18:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:09,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:09,617 INFO L225 Difference]: With dead ends: 145978 [2020-12-22 10:18:09,617 INFO L226 Difference]: Without dead ends: 128632 [2020-12-22 10:18:09,648 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 10:18:09,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128632 states. [2020-12-22 10:18:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128632 to 38506. [2020-12-22 10:18:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38506 states. [2020-12-22 10:18:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38506 states to 38506 states and 54800 transitions. [2020-12-22 10:18:13,265 INFO L78 Accepts]: Start accepts. Automaton has 38506 states and 54800 transitions. Word has length 129 [2020-12-22 10:18:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:13,266 INFO L481 AbstractCegarLoop]: Abstraction has 38506 states and 54800 transitions. [2020-12-22 10:18:13,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 38506 states and 54800 transitions. [2020-12-22 10:18:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:13,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:13,280 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 10:18:13,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:18:13,280 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:13,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1343254354, now seen corresponding path program 1 times [2020-12-22 10:18:13,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:13,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149499210] [2020-12-22 10:18:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:18:13,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149499210] [2020-12-22 10:18:13,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:13,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:13,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959482503] [2020-12-22 10:18:13,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:13,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:13,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:13,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:13,456 INFO L87 Difference]: Start difference. First operand 38506 states and 54800 transitions. Second operand 9 states. [2020-12-22 10:18:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:23,690 INFO L93 Difference]: Finished difference Result 163322 states and 233784 transitions. [2020-12-22 10:18:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:23,691 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:24,014 INFO L225 Difference]: With dead ends: 163322 [2020-12-22 10:18:24,015 INFO L226 Difference]: Without dead ends: 145976 [2020-12-22 10:18:24,046 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 10:18:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145976 states. [2020-12-22 10:18:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145976 to 64554. [2020-12-22 10:18:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64554 states. [2020-12-22 10:18:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64554 states to 64554 states and 91696 transitions. [2020-12-22 10:18:29,693 INFO L78 Accepts]: Start accepts. Automaton has 64554 states and 91696 transitions. Word has length 129 [2020-12-22 10:18:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:29,693 INFO L481 AbstractCegarLoop]: Abstraction has 64554 states and 91696 transitions. [2020-12-22 10:18:29,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 64554 states and 91696 transitions. [2020-12-22 10:18:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:29,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:29,707 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 10:18:29,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:18:29,708 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:29,708 INFO L82 PathProgramCache]: Analyzing trace with hash 126178628, now seen corresponding path program 1 times [2020-12-22 10:18:29,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:29,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255853544] [2020-12-22 10:18:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:29,883 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 10:18:29,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255853544] [2020-12-22 10:18:29,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:29,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:29,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940840879] [2020-12-22 10:18:29,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:29,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:29,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:29,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:29,886 INFO L87 Difference]: Start difference. First operand 64554 states and 91696 transitions. Second operand 9 states. [2020-12-22 10:18:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:42,044 INFO L93 Difference]: Finished difference Result 180666 states and 258488 transitions. [2020-12-22 10:18:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:42,045 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:18:42,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:42,231 INFO L225 Difference]: With dead ends: 180666 [2020-12-22 10:18:42,231 INFO L226 Difference]: Without dead ends: 163320 [2020-12-22 10:18:42,271 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 10:18:42,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163320 states. [2020-12-22 10:18:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163320 to 81898. [2020-12-22 10:18:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81898 states. [2020-12-22 10:18:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81898 states to 81898 states and 116400 transitions. [2020-12-22 10:18:49,611 INFO L78 Accepts]: Start accepts. Automaton has 81898 states and 116400 transitions. Word has length 129 [2020-12-22 10:18:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:49,611 INFO L481 AbstractCegarLoop]: Abstraction has 81898 states and 116400 transitions. [2020-12-22 10:18:49,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 81898 states and 116400 transitions. [2020-12-22 10:18:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:49,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:49,636 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 10:18:49,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:18:49,637 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:49,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1109280412, now seen corresponding path program 1 times [2020-12-22 10:18:49,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:49,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338509993] [2020-12-22 10:18:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:18:49,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338509993] [2020-12-22 10:18:49,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:49,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:49,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169721457] [2020-12-22 10:18:49,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:49,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:49,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:49,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:49,809 INFO L87 Difference]: Start difference. First operand 81898 states and 116400 transitions. Second operand 9 states. [2020-12-22 10:19:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:04,572 INFO L93 Difference]: Finished difference Result 198010 states and 283192 transitions. [2020-12-22 10:19:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:04,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:04,978 INFO L225 Difference]: With dead ends: 198010 [2020-12-22 10:19:04,978 INFO L226 Difference]: Without dead ends: 180664 [2020-12-22 10:19:05,037 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 10:19:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180664 states. [2020-12-22 10:19:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180664 to 99242. [2020-12-22 10:19:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99242 states. [2020-12-22 10:19:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99242 states to 99242 states and 141104 transitions. [2020-12-22 10:19:14,218 INFO L78 Accepts]: Start accepts. Automaton has 99242 states and 141104 transitions. Word has length 129 [2020-12-22 10:19:14,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:14,220 INFO L481 AbstractCegarLoop]: Abstraction has 99242 states and 141104 transitions. [2020-12-22 10:19:14,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 99242 states and 141104 transitions. [2020-12-22 10:19:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:14,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:14,233 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 10:19:14,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:19:14,234 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:14,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1764691332, now seen corresponding path program 1 times [2020-12-22 10:19:14,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:14,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959240037] [2020-12-22 10:19:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:19:14,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959240037] [2020-12-22 10:19:14,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:14,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:14,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964426733] [2020-12-22 10:19:14,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:14,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:14,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:14,414 INFO L87 Difference]: Start difference. First operand 99242 states and 141104 transitions. Second operand 9 states. [2020-12-22 10:19:32,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:32,049 INFO L93 Difference]: Finished difference Result 215354 states and 307896 transitions. [2020-12-22 10:19:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:32,051 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:32,485 INFO L225 Difference]: With dead ends: 215354 [2020-12-22 10:19:32,485 INFO L226 Difference]: Without dead ends: 198008 [2020-12-22 10:19:32,528 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 10:19:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198008 states. [2020-12-22 10:19:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198008 to 116586. [2020-12-22 10:19:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116586 states. [2020-12-22 10:19:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116586 states to 116586 states and 165808 transitions. [2020-12-22 10:19:44,163 INFO L78 Accepts]: Start accepts. Automaton has 116586 states and 165808 transitions. Word has length 129 [2020-12-22 10:19:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:44,164 INFO L481 AbstractCegarLoop]: Abstraction has 116586 states and 165808 transitions. [2020-12-22 10:19:44,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 116586 states and 165808 transitions. [2020-12-22 10:19:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:44,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:44,180 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 10:19:44,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:19:44,180 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:44,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1198870948, now seen corresponding path program 1 times [2020-12-22 10:19:44,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:44,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496599912] [2020-12-22 10:19:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:19:44,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496599912] [2020-12-22 10:19:44,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:44,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:44,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943069340] [2020-12-22 10:19:44,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:44,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:44,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:44,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:44,356 INFO L87 Difference]: Start difference. First operand 116586 states and 165808 transitions. Second operand 9 states. [2020-12-22 10:20:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:05,996 INFO L93 Difference]: Finished difference Result 232698 states and 332600 transitions. [2020-12-22 10:20:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:20:05,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:20:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:06,309 INFO L225 Difference]: With dead ends: 232698 [2020-12-22 10:20:06,309 INFO L226 Difference]: Without dead ends: 215352 [2020-12-22 10:20:06,561 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 10:20:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215352 states. [2020-12-22 10:20:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215352 to 133930. [2020-12-22 10:20:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133930 states. [2020-12-22 10:20:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133930 states to 133930 states and 190512 transitions. [2020-12-22 10:20:21,047 INFO L78 Accepts]: Start accepts. Automaton has 133930 states and 190512 transitions. Word has length 129 [2020-12-22 10:20:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:21,047 INFO L481 AbstractCegarLoop]: Abstraction has 133930 states and 190512 transitions. [2020-12-22 10:20:21,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:20:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 133930 states and 190512 transitions. [2020-12-22 10:20:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:20:21,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:21,066 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 10:20:21,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:20:21,066 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:21,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1388086724, now seen corresponding path program 1 times [2020-12-22 10:20:21,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:21,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981305434] [2020-12-22 10:20:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:20:21,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981305434] [2020-12-22 10:20:21,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:21,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:20:21,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995461817] [2020-12-22 10:20:21,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:20:21,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:21,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:20:21,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:20:21,252 INFO L87 Difference]: Start difference. First operand 133930 states and 190512 transitions. Second operand 9 states. [2020-12-22 10:20:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:46,448 INFO L93 Difference]: Finished difference Result 239418 states and 342328 transitions. [2020-12-22 10:20:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:20:46,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:20:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:46,796 INFO L225 Difference]: With dead ends: 239418 [2020-12-22 10:20:46,796 INFO L226 Difference]: Without dead ends: 227384 [2020-12-22 10:20:46,854 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 10:20:47,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227384 states.