/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:59:16,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:59:16,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:59:16,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:59:16,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:59:16,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:59:16,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:59:16,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:59:16,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:59:16,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:59:16,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:59:16,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:59:16,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:59:16,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:59:16,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:59:16,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:59:16,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:59:16,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:59:16,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:59:16,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:59:16,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:59:16,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:59:16,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:59:16,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:59:16,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:59:16,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:59:16,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:59:16,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:59:16,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:59:16,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:59:16,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:59:16,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:59:16,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:59:16,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:59:16,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:59:16,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:59:16,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:59:16,871 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:59:16,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:59:16,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:59:16,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:59:16,876 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:59:16,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:59:16,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:59:16,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:59:16,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:59:16,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:59:16,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:59:16,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:59:16,878 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:59:16,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:59:16,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:59:16,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:59:16,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:59:16,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:59:16,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:59:16,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:59:16,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:59:16,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:59:16,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:59:16,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:59:16,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:59:16,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:59:17,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:59:17,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:59:17,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:59:17,345 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:59:17,347 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:59:17,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 09:59:17,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1d1d0c3c/9b42179641a54cf99c7b41e551ae7fe5/FLAG471e5d390 [2020-12-22 09:59:18,448 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:59:18,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 09:59:18,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1d1d0c3c/9b42179641a54cf99c7b41e551ae7fe5/FLAG471e5d390 [2020-12-22 09:59:18,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1d1d0c3c/9b42179641a54cf99c7b41e551ae7fe5 [2020-12-22 09:59:18,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:59:18,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:59:18,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:59:18,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:59:18,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:59:18,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:59:18" (1/1) ... [2020-12-22 09:59:18,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cbbfa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:18, skipping insertion in model container [2020-12-22 09:59:18,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:59:18" (1/1) ... [2020-12-22 09:59:18,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:59:19,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:59:19,403 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[11832,11845] [2020-12-22 09:59:19,477 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[18879,18892] [2020-12-22 09:59:20,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:59:20,464 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:59:20,527 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[11832,11845] [2020-12-22 09:59:20,587 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[18879,18892] [2020-12-22 09:59:21,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:59:21,211 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:59:21,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21 WrapperNode [2020-12-22 09:59:21,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:59:21,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:59:21,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:59:21,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:59:21,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (1/1) ... [2020-12-22 09:59:21,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (1/1) ... [2020-12-22 09:59:21,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:59:21,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:59:21,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:59:21,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:59:21,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (1/1) ... [2020-12-22 09:59:21,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (1/1) ... [2020-12-22 09:59:21,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (1/1) ... [2020-12-22 09:59:21,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (1/1) ... [2020-12-22 09:59:22,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (1/1) ... [2020-12-22 09:59:22,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (1/1) ... [2020-12-22 09:59:22,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (1/1) ... [2020-12-22 09:59:22,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:59:22,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:59:22,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:59:22,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:59:22,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:59:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:59:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:59:22,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:59:22,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:59:27,716 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:59:27,716 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:59:27,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:59:27 BoogieIcfgContainer [2020-12-22 09:59:27,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:59:27,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:59:27,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:59:27,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:59:27,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:59:18" (1/3) ... [2020-12-22 09:59:27,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122d1eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:59:27, skipping insertion in model container [2020-12-22 09:59:27,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:21" (2/3) ... [2020-12-22 09:59:27,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122d1eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:59:27, skipping insertion in model container [2020-12-22 09:59:27,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:59:27" (3/3) ... [2020-12-22 09:59:27,729 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2020-12-22 09:59:27,736 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:59:27,741 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:59:27,760 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:59:27,794 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:59:27,794 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:59:27,794 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:59:27,794 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:59:27,794 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:59:27,795 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:59:27,795 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:59:27,795 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:59:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states. [2020-12-22 09:59:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:59:27,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:27,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:27,840 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:27,847 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:59:27,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:27,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572519124] [2020-12-22 09:59:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:28,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572519124] [2020-12-22 09:59:28,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:28,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:59:28,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986953570] [2020-12-22 09:59:28,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:59:28,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:28,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:59:28,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:59:28,159 INFO L87 Difference]: Start difference. First operand 908 states. Second operand 2 states. [2020-12-22 09:59:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:28,244 INFO L93 Difference]: Finished difference Result 1777 states and 3370 transitions. [2020-12-22 09:59:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:59:28,292 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:59:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:28,343 INFO L225 Difference]: With dead ends: 1777 [2020-12-22 09:59:28,343 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:59:28,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:59:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:59:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2020-12-22 09:59:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:59:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1588 transitions. [2020-12-22 09:59:28,476 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1588 transitions. Word has length 34 [2020-12-22 09:59:28,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:28,476 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1588 transitions. [2020-12-22 09:59:28,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:59:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1588 transitions. [2020-12-22 09:59:28,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:59:28,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:28,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:28,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:59:28,485 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:28,487 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:59:28,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:28,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59243647] [2020-12-22 09:59:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:28,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59243647] [2020-12-22 09:59:28,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:28,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:28,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118287320] [2020-12-22 09:59:28,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:59:28,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:59:28,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:59:28,644 INFO L87 Difference]: Start difference. First operand 842 states and 1588 transitions. Second operand 5 states. [2020-12-22 09:59:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:28,777 INFO L93 Difference]: Finished difference Result 897 states and 1673 transitions. [2020-12-22 09:59:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:59:28,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:59:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:28,783 INFO L225 Difference]: With dead ends: 897 [2020-12-22 09:59:28,783 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:59:28,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:59:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2020-12-22 09:59:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:59:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1557 transitions. [2020-12-22 09:59:28,805 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1557 transitions. Word has length 34 [2020-12-22 09:59:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:28,805 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1557 transitions. [2020-12-22 09:59:28,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:59:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1557 transitions. [2020-12-22 09:59:28,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:59:28,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:28,812 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] [2020-12-22 09:59:28,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:59:28,813 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash 157099052, now seen corresponding path program 1 times [2020-12-22 09:59:28,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:28,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373550630] [2020-12-22 09:59:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:29,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373550630] [2020-12-22 09:59:29,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:29,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:59:29,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427077579] [2020-12-22 09:59:29,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:29,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:29,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:29,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:29,038 INFO L87 Difference]: Start difference. First operand 842 states and 1557 transitions. Second operand 3 states. [2020-12-22 09:59:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:34,991 INFO L93 Difference]: Finished difference Result 2346 states and 4430 transitions. [2020-12-22 09:59:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:34,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 09:59:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:35,005 INFO L225 Difference]: With dead ends: 2346 [2020-12-22 09:59:35,005 INFO L226 Difference]: Without dead ends: 1593 [2020-12-22 09:59:35,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2020-12-22 09:59:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1593. [2020-12-22 09:59:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1593 states. [2020-12-22 09:59:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2536 transitions. [2020-12-22 09:59:35,058 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2536 transitions. Word has length 63 [2020-12-22 09:59:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:35,058 INFO L481 AbstractCegarLoop]: Abstraction has 1593 states and 2536 transitions. [2020-12-22 09:59:35,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2536 transitions. [2020-12-22 09:59:35,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:35,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:35,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:35,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:59:35,060 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:59:35,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:35,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495053737] [2020-12-22 09:59:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:35,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495053737] [2020-12-22 09:59:35,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:35,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:35,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891505996] [2020-12-22 09:59:35,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:35,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:35,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:35,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,143 INFO L87 Difference]: Start difference. First operand 1593 states and 2536 transitions. Second operand 3 states. [2020-12-22 09:59:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:35,183 INFO L93 Difference]: Finished difference Result 1689 states and 2688 transitions. [2020-12-22 09:59:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:35,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:35,194 INFO L225 Difference]: With dead ends: 1689 [2020-12-22 09:59:35,194 INFO L226 Difference]: Without dead ends: 1638 [2020-12-22 09:59:35,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2020-12-22 09:59:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1636. [2020-12-22 09:59:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-12-22 09:59:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2605 transitions. [2020-12-22 09:59:35,290 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2605 transitions. Word has length 64 [2020-12-22 09:59:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:35,291 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 2605 transitions. [2020-12-22 09:59:35,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2605 transitions. [2020-12-22 09:59:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:35,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:35,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:35,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:59:35,293 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:35,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:59:35,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:35,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498362689] [2020-12-22 09:59:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:35,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498362689] [2020-12-22 09:59:35,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:35,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:35,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982098473] [2020-12-22 09:59:35,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:35,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:35,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:35,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,360 INFO L87 Difference]: Start difference. First operand 1636 states and 2605 transitions. Second operand 3 states. [2020-12-22 09:59:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:35,403 INFO L93 Difference]: Finished difference Result 1812 states and 2885 transitions. [2020-12-22 09:59:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:35,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:35,414 INFO L225 Difference]: With dead ends: 1812 [2020-12-22 09:59:35,414 INFO L226 Difference]: Without dead ends: 1718 [2020-12-22 09:59:35,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-12-22 09:59:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1716. [2020-12-22 09:59:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2020-12-22 09:59:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2732 transitions. [2020-12-22 09:59:35,458 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2732 transitions. Word has length 64 [2020-12-22 09:59:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:35,458 INFO L481 AbstractCegarLoop]: Abstraction has 1716 states and 2732 transitions. [2020-12-22 09:59:35,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:35,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2732 transitions. [2020-12-22 09:59:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:35,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:35,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:35,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:59:35,460 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:35,461 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:59:35,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:35,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771706451] [2020-12-22 09:59:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:35,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771706451] [2020-12-22 09:59:35,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:35,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:35,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288566318] [2020-12-22 09:59:35,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:35,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,520 INFO L87 Difference]: Start difference. First operand 1716 states and 2732 transitions. Second operand 3 states. [2020-12-22 09:59:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:35,567 INFO L93 Difference]: Finished difference Result 2040 states and 3246 transitions. [2020-12-22 09:59:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:35,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:35,578 INFO L225 Difference]: With dead ends: 2040 [2020-12-22 09:59:35,578 INFO L226 Difference]: Without dead ends: 1866 [2020-12-22 09:59:35,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2020-12-22 09:59:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1864. [2020-12-22 09:59:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1864 states. [2020-12-22 09:59:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2964 transitions. [2020-12-22 09:59:35,629 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2964 transitions. Word has length 64 [2020-12-22 09:59:35,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:35,629 INFO L481 AbstractCegarLoop]: Abstraction has 1864 states and 2964 transitions. [2020-12-22 09:59:35,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2964 transitions. [2020-12-22 09:59:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:35,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:35,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:35,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:59:35,631 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:35,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:59:35,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:35,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42283415] [2020-12-22 09:59:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:35,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42283415] [2020-12-22 09:59:35,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:35,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:35,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956750866] [2020-12-22 09:59:35,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:35,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:35,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:35,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,691 INFO L87 Difference]: Start difference. First operand 1864 states and 2964 transitions. Second operand 3 states. [2020-12-22 09:59:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:35,754 INFO L93 Difference]: Finished difference Result 2460 states and 3902 transitions. [2020-12-22 09:59:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:35,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:35,767 INFO L225 Difference]: With dead ends: 2460 [2020-12-22 09:59:35,768 INFO L226 Difference]: Without dead ends: 2138 [2020-12-22 09:59:35,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2020-12-22 09:59:35,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 2136. [2020-12-22 09:59:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2136 states. [2020-12-22 09:59:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 3384 transitions. [2020-12-22 09:59:35,841 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 3384 transitions. Word has length 64 [2020-12-22 09:59:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:35,842 INFO L481 AbstractCegarLoop]: Abstraction has 2136 states and 3384 transitions. [2020-12-22 09:59:35,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 3384 transitions. [2020-12-22 09:59:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:35,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:35,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:35,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:59:35,843 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:59:35,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:35,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101287092] [2020-12-22 09:59:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:35,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101287092] [2020-12-22 09:59:35,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:35,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:35,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795687235] [2020-12-22 09:59:35,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:35,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:35,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:35,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,907 INFO L87 Difference]: Start difference. First operand 2136 states and 3384 transitions. Second operand 3 states. [2020-12-22 09:59:35,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:35,984 INFO L93 Difference]: Finished difference Result 3228 states and 5082 transitions. [2020-12-22 09:59:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:35,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:35,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:36,000 INFO L225 Difference]: With dead ends: 3228 [2020-12-22 09:59:36,000 INFO L226 Difference]: Without dead ends: 2634 [2020-12-22 09:59:36,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:36,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2020-12-22 09:59:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2632. [2020-12-22 09:59:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2632 states. [2020-12-22 09:59:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 4136 transitions. [2020-12-22 09:59:36,086 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 4136 transitions. Word has length 64 [2020-12-22 09:59:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:36,086 INFO L481 AbstractCegarLoop]: Abstraction has 2632 states and 4136 transitions. [2020-12-22 09:59:36,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:36,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 4136 transitions. [2020-12-22 09:59:36,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:36,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:36,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:36,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:59:36,088 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:36,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:36,088 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:59:36,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:36,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298011213] [2020-12-22 09:59:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:36,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298011213] [2020-12-22 09:59:36,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:36,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:36,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183412395] [2020-12-22 09:59:36,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:36,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:36,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:36,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:36,181 INFO L87 Difference]: Start difference. First operand 2632 states and 4136 transitions. Second operand 7 states. [2020-12-22 09:59:36,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:36,854 INFO L93 Difference]: Finished difference Result 13532 states and 20946 transitions. [2020-12-22 09:59:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:59:36,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:59:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:36,948 INFO L225 Difference]: With dead ends: 13532 [2020-12-22 09:59:36,948 INFO L226 Difference]: Without dead ends: 12442 [2020-12-22 09:59:36,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:59:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12442 states. [2020-12-22 09:59:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12442 to 3720. [2020-12-22 09:59:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-12-22 09:59:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5752 transitions. [2020-12-22 09:59:37,264 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5752 transitions. Word has length 64 [2020-12-22 09:59:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:37,264 INFO L481 AbstractCegarLoop]: Abstraction has 3720 states and 5752 transitions. [2020-12-22 09:59:37,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5752 transitions. [2020-12-22 09:59:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:37,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:37,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:37,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:59:37,272 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:59:37,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:37,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3206119] [2020-12-22 09:59:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:37,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3206119] [2020-12-22 09:59:37,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:37,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:37,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216134611] [2020-12-22 09:59:37,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:37,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:37,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:37,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:37,354 INFO L87 Difference]: Start difference. First operand 3720 states and 5752 transitions. Second operand 3 states. [2020-12-22 09:59:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:37,649 INFO L93 Difference]: Finished difference Result 6910 states and 10572 transitions. [2020-12-22 09:59:37,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:37,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:59:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:37,663 INFO L225 Difference]: With dead ends: 6910 [2020-12-22 09:59:37,664 INFO L226 Difference]: Without dead ends: 4732 [2020-12-22 09:59:37,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2020-12-22 09:59:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4730. [2020-12-22 09:59:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 09:59:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7226 transitions. [2020-12-22 09:59:37,909 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7226 transitions. Word has length 66 [2020-12-22 09:59:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:37,909 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7226 transitions. [2020-12-22 09:59:37,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7226 transitions. [2020-12-22 09:59:37,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:37,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:37,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:37,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:59:37,910 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:37,911 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:59:37,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:37,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731821038] [2020-12-22 09:59:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:38,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731821038] [2020-12-22 09:59:38,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:38,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:38,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128686949] [2020-12-22 09:59:38,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:38,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:38,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:38,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:38,151 INFO L87 Difference]: Start difference. First operand 4730 states and 7226 transitions. Second operand 7 states. [2020-12-22 09:59:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:38,571 INFO L93 Difference]: Finished difference Result 7918 states and 11996 transitions. [2020-12-22 09:59:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:38,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:59:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:38,585 INFO L225 Difference]: With dead ends: 7918 [2020-12-22 09:59:38,585 INFO L226 Difference]: Without dead ends: 4732 [2020-12-22 09:59:38,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:59:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2020-12-22 09:59:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4730. [2020-12-22 09:59:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 09:59:38,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7178 transitions. [2020-12-22 09:59:38,824 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7178 transitions. Word has length 66 [2020-12-22 09:59:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:38,824 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7178 transitions. [2020-12-22 09:59:38,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7178 transitions. [2020-12-22 09:59:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:59:38,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:38,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:38,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:59:38,826 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:38,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:38,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:59:38,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:38,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820588161] [2020-12-22 09:59:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:38,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820588161] [2020-12-22 09:59:38,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:38,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:38,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631309127] [2020-12-22 09:59:38,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:38,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:38,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:38,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:38,941 INFO L87 Difference]: Start difference. First operand 4730 states and 7178 transitions. Second operand 6 states. [2020-12-22 09:59:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:39,283 INFO L93 Difference]: Finished difference Result 7916 states and 11899 transitions. [2020-12-22 09:59:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:39,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:59:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:39,294 INFO L225 Difference]: With dead ends: 7916 [2020-12-22 09:59:39,295 INFO L226 Difference]: Without dead ends: 4730 [2020-12-22 09:59:39,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2020-12-22 09:59:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 4730. [2020-12-22 09:59:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 09:59:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7130 transitions. [2020-12-22 09:59:39,619 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7130 transitions. Word has length 67 [2020-12-22 09:59:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:39,624 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7130 transitions. [2020-12-22 09:59:39,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7130 transitions. [2020-12-22 09:59:39,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:59:39,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:39,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:39,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:59:39,625 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:39,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:39,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:59:39,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:39,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044057602] [2020-12-22 09:59:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:39,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044057602] [2020-12-22 09:59:39,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:39,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:39,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990128263] [2020-12-22 09:59:39,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:39,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:39,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:39,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:39,725 INFO L87 Difference]: Start difference. First operand 4730 states and 7130 transitions. Second operand 6 states. [2020-12-22 09:59:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:40,047 INFO L93 Difference]: Finished difference Result 7916 states and 11803 transitions. [2020-12-22 09:59:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:40,048 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:59:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:40,058 INFO L225 Difference]: With dead ends: 7916 [2020-12-22 09:59:40,058 INFO L226 Difference]: Without dead ends: 4730 [2020-12-22 09:59:40,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2020-12-22 09:59:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 4730. [2020-12-22 09:59:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-12-22 09:59:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 7082 transitions. [2020-12-22 09:59:40,312 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 7082 transitions. Word has length 67 [2020-12-22 09:59:40,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:40,312 INFO L481 AbstractCegarLoop]: Abstraction has 4730 states and 7082 transitions. [2020-12-22 09:59:40,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:40,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 7082 transitions. [2020-12-22 09:59:40,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:59:40,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:40,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:40,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:59:40,315 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:40,315 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:59:40,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:40,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664674399] [2020-12-22 09:59:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:40,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664674399] [2020-12-22 09:59:40,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:40,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:40,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046266931] [2020-12-22 09:59:40,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:59:40,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:40,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:59:40,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:59:40,409 INFO L87 Difference]: Start difference. First operand 4730 states and 7082 transitions. Second operand 5 states. [2020-12-22 09:59:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:40,935 INFO L93 Difference]: Finished difference Result 7509 states and 10992 transitions. [2020-12-22 09:59:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:40,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:59:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:40,951 INFO L225 Difference]: With dead ends: 7509 [2020-12-22 09:59:40,951 INFO L226 Difference]: Without dead ends: 7507 [2020-12-22 09:59:40,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:59:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7507 states. [2020-12-22 09:59:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7507 to 4922. [2020-12-22 09:59:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4922 states. [2020-12-22 09:59:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 7258 transitions. [2020-12-22 09:59:41,332 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 7258 transitions. Word has length 67 [2020-12-22 09:59:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:41,333 INFO L481 AbstractCegarLoop]: Abstraction has 4922 states and 7258 transitions. [2020-12-22 09:59:41,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:59:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 7258 transitions. [2020-12-22 09:59:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:41,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:41,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:41,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:59:41,338 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:41,339 INFO L82 PathProgramCache]: Analyzing trace with hash -119875554, now seen corresponding path program 1 times [2020-12-22 09:59:41,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:41,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114028527] [2020-12-22 09:59:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:59:41,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114028527] [2020-12-22 09:59:41,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:41,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:41,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270748707] [2020-12-22 09:59:41,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:41,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:41,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:41,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:41,491 INFO L87 Difference]: Start difference. First operand 4922 states and 7258 transitions. Second operand 7 states. [2020-12-22 09:59:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:43,016 INFO L93 Difference]: Finished difference Result 22502 states and 32192 transitions. [2020-12-22 09:59:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:43,017 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:43,054 INFO L225 Difference]: With dead ends: 22502 [2020-12-22 09:59:43,054 INFO L226 Difference]: Without dead ends: 19124 [2020-12-22 09:59:43,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19124 states. [2020-12-22 09:59:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19124 to 8298. [2020-12-22 09:59:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8298 states. [2020-12-22 09:59:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8298 states to 8298 states and 12010 transitions. [2020-12-22 09:59:43,713 INFO L78 Accepts]: Start accepts. Automaton has 8298 states and 12010 transitions. Word has length 94 [2020-12-22 09:59:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:43,713 INFO L481 AbstractCegarLoop]: Abstraction has 8298 states and 12010 transitions. [2020-12-22 09:59:43,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 8298 states and 12010 transitions. [2020-12-22 09:59:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:43,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:43,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:43,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:59:43,718 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1888658370, now seen corresponding path program 1 times [2020-12-22 09:59:43,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:43,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434512126] [2020-12-22 09:59:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:59:43,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434512126] [2020-12-22 09:59:43,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:43,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:43,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857765635] [2020-12-22 09:59:43,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:43,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:43,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:43,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:43,864 INFO L87 Difference]: Start difference. First operand 8298 states and 12010 transitions. Second operand 7 states. [2020-12-22 09:59:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:45,465 INFO L93 Difference]: Finished difference Result 25878 states and 36944 transitions. [2020-12-22 09:59:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:45,466 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:45,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:45,513 INFO L225 Difference]: With dead ends: 25878 [2020-12-22 09:59:45,513 INFO L226 Difference]: Without dead ends: 22500 [2020-12-22 09:59:45,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22500 states. [2020-12-22 09:59:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22500 to 13370. [2020-12-22 09:59:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13370 states. [2020-12-22 09:59:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13370 states to 13370 states and 19098 transitions. [2020-12-22 09:59:46,581 INFO L78 Accepts]: Start accepts. Automaton has 13370 states and 19098 transitions. Word has length 94 [2020-12-22 09:59:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:46,581 INFO L481 AbstractCegarLoop]: Abstraction has 13370 states and 19098 transitions. [2020-12-22 09:59:46,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 13370 states and 19098 transitions. [2020-12-22 09:59:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:46,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:46,586 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:46,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:59:46,587 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:46,588 INFO L82 PathProgramCache]: Analyzing trace with hash -757018530, now seen corresponding path program 1 times [2020-12-22 09:59:46,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:46,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380968443] [2020-12-22 09:59:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:59:46,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380968443] [2020-12-22 09:59:46,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:46,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:46,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983483389] [2020-12-22 09:59:46,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:46,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:46,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:46,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:46,703 INFO L87 Difference]: Start difference. First operand 13370 states and 19098 transitions. Second operand 7 states. [2020-12-22 09:59:48,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:48,447 INFO L93 Difference]: Finished difference Result 29254 states and 41696 transitions. [2020-12-22 09:59:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:48,448 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:48,499 INFO L225 Difference]: With dead ends: 29254 [2020-12-22 09:59:48,500 INFO L226 Difference]: Without dead ends: 25876 [2020-12-22 09:59:48,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:48,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25876 states. [2020-12-22 09:59:49,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25876 to 16746. [2020-12-22 09:59:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16746 states. [2020-12-22 09:59:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16746 states to 16746 states and 23850 transitions. [2020-12-22 09:59:49,786 INFO L78 Accepts]: Start accepts. Automaton has 16746 states and 23850 transitions. Word has length 94 [2020-12-22 09:59:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:49,786 INFO L481 AbstractCegarLoop]: Abstraction has 16746 states and 23850 transitions. [2020-12-22 09:59:49,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 16746 states and 23850 transitions. [2020-12-22 09:59:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:49,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:49,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:49,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:59:49,792 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1992477570, now seen corresponding path program 1 times [2020-12-22 09:59:49,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:49,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21158257] [2020-12-22 09:59:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:59:49,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21158257] [2020-12-22 09:59:49,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:49,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:49,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923385896] [2020-12-22 09:59:49,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:49,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:49,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:49,926 INFO L87 Difference]: Start difference. First operand 16746 states and 23850 transitions. Second operand 7 states. [2020-12-22 09:59:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:51,662 INFO L93 Difference]: Finished difference Result 32630 states and 46448 transitions. [2020-12-22 09:59:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:51,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:51,710 INFO L225 Difference]: With dead ends: 32630 [2020-12-22 09:59:51,710 INFO L226 Difference]: Without dead ends: 29252 [2020-12-22 09:59:51,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29252 states. [2020-12-22 09:59:53,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29252 to 20122. [2020-12-22 09:59:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20122 states. [2020-12-22 09:59:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20122 states to 20122 states and 28602 transitions. [2020-12-22 09:59:53,083 INFO L78 Accepts]: Start accepts. Automaton has 20122 states and 28602 transitions. Word has length 94 [2020-12-22 09:59:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:53,083 INFO L481 AbstractCegarLoop]: Abstraction has 20122 states and 28602 transitions. [2020-12-22 09:59:53,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 20122 states and 28602 transitions. [2020-12-22 09:59:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:53,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:53,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:53,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:59:53,089 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:53,090 INFO L82 PathProgramCache]: Analyzing trace with hash 881494174, now seen corresponding path program 1 times [2020-12-22 09:59:53,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:53,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891778198] [2020-12-22 09:59:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:59:53,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891778198] [2020-12-22 09:59:53,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:53,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:53,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392372742] [2020-12-22 09:59:53,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:53,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:53,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:53,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:53,218 INFO L87 Difference]: Start difference. First operand 20122 states and 28602 transitions. Second operand 7 states. [2020-12-22 09:59:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:55,181 INFO L93 Difference]: Finished difference Result 33990 states and 48384 transitions. [2020-12-22 09:59:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:55,186 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:55,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:55,229 INFO L225 Difference]: With dead ends: 33990 [2020-12-22 09:59:55,230 INFO L226 Difference]: Without dead ends: 31620 [2020-12-22 09:59:55,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31620 states. [2020-12-22 09:59:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31620 to 22490. [2020-12-22 09:59:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22490 states. [2020-12-22 09:59:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22490 states to 22490 states and 31962 transitions. [2020-12-22 09:59:56,777 INFO L78 Accepts]: Start accepts. Automaton has 22490 states and 31962 transitions. Word has length 94 [2020-12-22 09:59:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:56,778 INFO L481 AbstractCegarLoop]: Abstraction has 22490 states and 31962 transitions. [2020-12-22 09:59:56,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 22490 states and 31962 transitions. [2020-12-22 09:59:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:59:56,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:56,785 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:56,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:59:56,785 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:56,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:56,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2121264847, now seen corresponding path program 1 times [2020-12-22 09:59:56,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:56,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492034351] [2020-12-22 09:59:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:57,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492034351] [2020-12-22 09:59:57,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061296865] [2020-12-22 09:59:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:59:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:57,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:59:57,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:59:57,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:57,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:59:57,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349282311] [2020-12-22 09:59:57,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:59:57,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:57,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:59:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:59:57,725 INFO L87 Difference]: Start difference. First operand 22490 states and 31962 transitions. Second operand 16 states. [2020-12-22 10:00:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:11,279 INFO L93 Difference]: Finished difference Result 135089 states and 188761 transitions. [2020-12-22 10:00:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 10:00:11,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2020-12-22 10:00:11,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:11,525 INFO L225 Difference]: With dead ends: 135089 [2020-12-22 10:00:11,526 INFO L226 Difference]: Without dead ends: 114143 [2020-12-22 10:00:11,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1223, Invalid=5419, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 10:00:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114143 states. [2020-12-22 10:00:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114143 to 71746. [2020-12-22 10:00:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71746 states. [2020-12-22 10:00:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71746 states to 71746 states and 99946 transitions. [2020-12-22 10:00:18,597 INFO L78 Accepts]: Start accepts. Automaton has 71746 states and 99946 transitions. Word has length 95 [2020-12-22 10:00:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:18,597 INFO L481 AbstractCegarLoop]: Abstraction has 71746 states and 99946 transitions. [2020-12-22 10:00:18,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:00:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 71746 states and 99946 transitions. [2020-12-22 10:00:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 10:00:18,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:18,606 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:18,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:00:18,822 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:18,823 INFO L82 PathProgramCache]: Analyzing trace with hash 421270486, now seen corresponding path program 1 times [2020-12-22 10:00:18,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:18,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826078693] [2020-12-22 10:00:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:19,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826078693] [2020-12-22 10:00:19,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741157990] [2020-12-22 10:00:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:00:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:19,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:00:19,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:00:19,549 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:00:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:19,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:00:19,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-12-22 10:00:19,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639427953] [2020-12-22 10:00:19,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:00:19,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:19,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:00:19,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:00:19,748 INFO L87 Difference]: Start difference. First operand 71746 states and 99946 transitions. Second operand 21 states. [2020-12-22 10:00:20,233 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:00:21,249 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:00:21,659 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 10:00:30,984 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:31,173 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:00:31,405 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:31,601 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:00:31,949 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:00:32,207 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 10:00:32,391 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:00:32,660 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:00:32,853 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:33,400 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:33,842 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:34,839 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 10:00:35,471 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:00:36,378 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 10:00:36,596 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:00:36,870 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:00:37,102 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 10:00:37,325 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:37,781 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 10:00:38,749 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 10:00:38,950 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:39,288 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:39,646 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:00:43,410 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-22 10:02:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:01,990 INFO L93 Difference]: Finished difference Result 974253 states and 1327479 transitions. [2020-12-22 10:02:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2020-12-22 10:02:01,991 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 10:02:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:03,812 INFO L225 Difference]: With dead ends: 974253 [2020-12-22 10:02:03,812 INFO L226 Difference]: Without dead ends: 904051 [2020-12-22 10:02:04,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45792 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=10942, Invalid=93710, Unknown=0, NotChecked=0, Total=104652 [2020-12-22 10:02:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904051 states. [2020-12-22 10:02:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904051 to 346462. [2020-12-22 10:02:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346462 states. [2020-12-22 10:02:42,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346462 states to 346462 states and 476866 transitions. [2020-12-22 10:02:42,464 INFO L78 Accepts]: Start accepts. Automaton has 346462 states and 476866 transitions. Word has length 96 [2020-12-22 10:02:42,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:42,465 INFO L481 AbstractCegarLoop]: Abstraction has 346462 states and 476866 transitions. [2020-12-22 10:02:42,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:02:42,465 INFO L276 IsEmpty]: Start isEmpty. Operand 346462 states and 476866 transitions. [2020-12-22 10:02:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 10:02:42,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:42,479 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:42,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:02:42,693 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:42,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash 496443166, now seen corresponding path program 1 times [2020-12-22 10:02:42,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:42,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460192809] [2020-12-22 10:02:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:42,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460192809] [2020-12-22 10:02:42,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:42,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:42,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854746329] [2020-12-22 10:02:42,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:42,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:42,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:42,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:42,775 INFO L87 Difference]: Start difference. First operand 346462 states and 476866 transitions. Second operand 3 states.