./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label27.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f2d01fae317b054ddf6fc311dfbe1142cfd4012ffbce2b7f37ce8e1b21b188d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:36:35,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:36:35,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:36:35,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:36:35,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:36:35,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:36:35,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:36:35,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:36:35,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:36:35,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:36:35,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:36:35,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:36:35,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:36:35,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:36:35,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:36:35,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:36:35,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:36:35,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:36:35,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:36:35,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:36:35,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:36:35,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:36:35,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:36:35,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:36:35,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:36:35,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:36:35,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:36:35,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:36:35,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:36:35,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:36:35,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:36:35,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:36:35,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:36:35,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:36:35,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:36:35,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:36:35,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:36:35,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:36:35,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:36:35,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:36:35,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:36:35,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:36:35,789 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:36:35,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:36:35,790 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:36:35,790 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:36:35,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:36:35,791 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:36:35,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:36:35,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:36:35,792 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:36:35,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:36:35,793 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:36:35,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:36:35,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:36:35,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:36:35,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:36:35,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:36:35,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:36:35,794 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:36:35,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:36:35,794 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:36:35,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:36:35,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:36:35,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:36:35,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:36:35,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:36:35,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:36:35,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:36:35,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:36:35,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:36:35,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:36:35,795 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:36:35,796 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:36:35,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:36:35,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:36:35,796 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f2d01fae317b054ddf6fc311dfbe1142cfd4012ffbce2b7f37ce8e1b21b188d [2021-12-22 09:36:36,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:36:36,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:36:36,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:36:36,095 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:36:36,096 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:36:36,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label27.c [2021-12-22 09:36:36,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab3fd5b70/3e7cd764353d4fc98f724eb4e7a09fee/FLAG07b6ce0f4 [2021-12-22 09:36:36,671 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:36:36,672 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label27.c [2021-12-22 09:36:36,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab3fd5b70/3e7cd764353d4fc98f724eb4e7a09fee/FLAG07b6ce0f4 [2021-12-22 09:36:36,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab3fd5b70/3e7cd764353d4fc98f724eb4e7a09fee [2021-12-22 09:36:36,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:36:36,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:36:36,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:36:36,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:36:36,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:36:36,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:36:36" (1/1) ... [2021-12-22 09:36:36,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2033439e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:36, skipping insertion in model container [2021-12-22 09:36:36,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:36:36" (1/1) ... [2021-12-22 09:36:36,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:36:36,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:36:37,117 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label27.c[6203,6216] [2021-12-22 09:36:37,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:36:37,504 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:36:37,527 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label27.c[6203,6216] [2021-12-22 09:36:37,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:36:37,745 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:36:37,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37 WrapperNode [2021-12-22 09:36:37,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:36:37,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:36:37,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:36:37,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:36:37,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (1/1) ... [2021-12-22 09:36:37,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (1/1) ... [2021-12-22 09:36:38,080 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-22 09:36:38,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:36:38,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:36:38,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:36:38,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:36:38,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (1/1) ... [2021-12-22 09:36:38,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (1/1) ... [2021-12-22 09:36:38,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (1/1) ... [2021-12-22 09:36:38,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (1/1) ... [2021-12-22 09:36:38,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (1/1) ... [2021-12-22 09:36:38,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (1/1) ... [2021-12-22 09:36:38,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (1/1) ... [2021-12-22 09:36:38,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:36:38,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:36:38,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:36:38,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:36:38,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (1/1) ... [2021-12-22 09:36:38,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:36:38,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:36:38,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 09:36:38,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 09:36:38,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:36:38,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:36:38,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:36:38,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:36:38,477 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:36:38,479 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:36:40,643 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:36:40,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:36:40,661 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:36:40,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:36:40 BoogieIcfgContainer [2021-12-22 09:36:40,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:36:40,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:36:40,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:36:40,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:36:40,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:36:36" (1/3) ... [2021-12-22 09:36:40,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31385023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:36:40, skipping insertion in model container [2021-12-22 09:36:40,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:36:37" (2/3) ... [2021-12-22 09:36:40,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31385023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:36:40, skipping insertion in model container [2021-12-22 09:36:40,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:36:40" (3/3) ... [2021-12-22 09:36:40,669 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label27.c [2021-12-22 09:36:40,674 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:36:40,674 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:36:40,720 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:36:40,726 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 09:36:40,727 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:36:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 09:36:40,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:36:40,758 INFO L514 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] [2021-12-22 09:36:40,758 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:36:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:36:40,762 INFO L85 PathProgramCache]: Analyzing trace with hash 751578873, now seen corresponding path program 1 times [2021-12-22 09:36:40,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:36:40,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728037932] [2021-12-22 09:36:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:40,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:36:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:36:40,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:36:40,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728037932] [2021-12-22 09:36:40,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728037932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:36:40,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:36:40,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:36:40,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323863563] [2021-12-22 09:36:40,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:36:40,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:36:40,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:36:40,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:36:40,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:36:40,983 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:43,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:36:43,151 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2021-12-22 09:36:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:36:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-22 09:36:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:36:43,166 INFO L225 Difference]: With dead ends: 1680 [2021-12-22 09:36:43,167 INFO L226 Difference]: Without dead ends: 1011 [2021-12-22 09:36:43,171 INFO L932 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 [2021-12-22 09:36:43,173 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 540 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:36:43,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 220 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 09:36:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-12-22 09:36:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2021-12-22 09:36:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.735678391959799) internal successors, (1727), 995 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2021-12-22 09:36:43,229 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 41 [2021-12-22 09:36:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:36:43,229 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2021-12-22 09:36:43,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2021-12-22 09:36:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-22 09:36:43,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:36:43,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:36:43,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:36:43,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:36:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:36:43,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1125860323, now seen corresponding path program 1 times [2021-12-22 09:36:43,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:36:43,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669002415] [2021-12-22 09:36:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:43,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:36:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:36:43,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:36:43,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669002415] [2021-12-22 09:36:43,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669002415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:36:43,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:36:43,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:36:43,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328512853] [2021-12-22 09:36:43,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:36:43,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:36:43,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:36:43,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:36:43,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:36:43,310 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:36:45,152 INFO L93 Difference]: Finished difference Result 2871 states and 5025 transitions. [2021-12-22 09:36:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:36:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-22 09:36:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:36:45,188 INFO L225 Difference]: With dead ends: 2871 [2021-12-22 09:36:45,188 INFO L226 Difference]: Without dead ends: 1877 [2021-12-22 09:36:45,189 INFO L932 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 [2021-12-22 09:36:45,190 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:36:45,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 520 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-22 09:36:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-12-22 09:36:45,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1870. [2021-12-22 09:36:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.4719101123595506) internal successors, (2751), 1869 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2751 transitions. [2021-12-22 09:36:45,221 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2751 transitions. Word has length 106 [2021-12-22 09:36:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:36:45,222 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2751 transitions. [2021-12-22 09:36:45,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2751 transitions. [2021-12-22 09:36:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 09:36:45,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:36:45,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:36:45,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:36:45,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:36:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:36:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash 253179212, now seen corresponding path program 1 times [2021-12-22 09:36:45,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:36:45,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6561238] [2021-12-22 09:36:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:45,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:36:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:36:45,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:36:45,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6561238] [2021-12-22 09:36:45,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6561238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:36:45,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:36:45,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:36:45,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741990141] [2021-12-22 09:36:45,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:36:45,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:36:45,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:36:45,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:36:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:36:45,304 INFO L87 Difference]: Start difference. First operand 1870 states and 2751 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:36:46,997 INFO L93 Difference]: Finished difference Result 5454 states and 8039 transitions. [2021-12-22 09:36:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:36:46,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-22 09:36:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:36:47,008 INFO L225 Difference]: With dead ends: 5454 [2021-12-22 09:36:47,008 INFO L226 Difference]: Without dead ends: 3586 [2021-12-22 09:36:47,011 INFO L932 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 [2021-12-22 09:36:47,011 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 453 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:36:47,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 914 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:36:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-12-22 09:36:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3583. [2021-12-22 09:36:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3355667225013959) internal successors, (4784), 3582 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4784 transitions. [2021-12-22 09:36:47,054 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4784 transitions. Word has length 111 [2021-12-22 09:36:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:36:47,054 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4784 transitions. [2021-12-22 09:36:47,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4784 transitions. [2021-12-22 09:36:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-22 09:36:47,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:36:47,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:36:47,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:36:47,057 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:36:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:36:47,057 INFO L85 PathProgramCache]: Analyzing trace with hash -111791273, now seen corresponding path program 1 times [2021-12-22 09:36:47,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:36:47,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581761622] [2021-12-22 09:36:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:47,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:36:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:36:47,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:36:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581761622] [2021-12-22 09:36:47,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581761622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:36:47,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:36:47,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:36:47,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123275016] [2021-12-22 09:36:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:36:47,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:36:47,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:36:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:36:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:36:47,151 INFO L87 Difference]: Start difference. First operand 3583 states and 4784 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:36:48,849 INFO L93 Difference]: Finished difference Result 10571 states and 14108 transitions. [2021-12-22 09:36:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:36:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-12-22 09:36:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:36:48,889 INFO L225 Difference]: With dead ends: 10571 [2021-12-22 09:36:48,890 INFO L226 Difference]: Without dead ends: 5286 [2021-12-22 09:36:48,896 INFO L932 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 [2021-12-22 09:36:48,897 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:36:48,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:36:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-12-22 09:36:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4434. [2021-12-22 09:36:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 4433 states have (on average 1.2091134671779833) internal successors, (5360), 4433 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 5360 transitions. [2021-12-22 09:36:49,020 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 5360 transitions. Word has length 152 [2021-12-22 09:36:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:36:49,036 INFO L470 AbstractCegarLoop]: Abstraction has 4434 states and 5360 transitions. [2021-12-22 09:36:49,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 5360 transitions. [2021-12-22 09:36:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-22 09:36:49,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:36:49,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:36:49,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:36:49,038 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:36:49,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:36:49,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1925292906, now seen corresponding path program 1 times [2021-12-22 09:36:49,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:36:49,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428192610] [2021-12-22 09:36:49,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:49,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:36:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:36:49,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:36:49,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428192610] [2021-12-22 09:36:49,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428192610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:36:49,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:36:49,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:36:49,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824495578] [2021-12-22 09:36:49,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:36:49,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:36:49,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:36:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:36:49,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:36:49,214 INFO L87 Difference]: Start difference. First operand 4434 states and 5360 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:36:50,548 INFO L93 Difference]: Finished difference Result 11414 states and 14015 transitions. [2021-12-22 09:36:50,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:36:50,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-12-22 09:36:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:36:50,574 INFO L225 Difference]: With dead ends: 11414 [2021-12-22 09:36:50,574 INFO L226 Difference]: Without dead ends: 6982 [2021-12-22 09:36:50,578 INFO L932 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 [2021-12-22 09:36:50,584 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:36:50,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:36:50,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2021-12-22 09:36:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6982. [2021-12-22 09:36:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 6981 states have (on average 1.1834980661796304) internal successors, (8262), 6981 states have internal predecessors, (8262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 8262 transitions. [2021-12-22 09:36:50,716 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 8262 transitions. Word has length 193 [2021-12-22 09:36:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:36:50,717 INFO L470 AbstractCegarLoop]: Abstraction has 6982 states and 8262 transitions. [2021-12-22 09:36:50,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 8262 transitions. [2021-12-22 09:36:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-12-22 09:36:50,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:36:50,723 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:36:50,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:36:50,724 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:36:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:36:50,725 INFO L85 PathProgramCache]: Analyzing trace with hash 18373913, now seen corresponding path program 1 times [2021-12-22 09:36:50,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:36:50,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216079312] [2021-12-22 09:36:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:50,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:36:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-22 09:36:50,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:36:50,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216079312] [2021-12-22 09:36:50,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216079312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:36:50,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:36:50,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:36:50,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373611714] [2021-12-22 09:36:50,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:36:50,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:36:50,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:36:50,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:36:50,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:36:50,849 INFO L87 Difference]: Start difference. First operand 6982 states and 8262 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:36:52,315 INFO L93 Difference]: Finished difference Result 17788 states and 21273 transitions. [2021-12-22 09:36:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:36:52,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-12-22 09:36:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:36:52,345 INFO L225 Difference]: With dead ends: 17788 [2021-12-22 09:36:52,346 INFO L226 Difference]: Without dead ends: 9958 [2021-12-22 09:36:52,353 INFO L932 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 [2021-12-22 09:36:52,356 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 384 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:36:52,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 858 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:36:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9958 states. [2021-12-22 09:36:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9958 to 9958. [2021-12-22 09:36:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 1.1449231696294064) internal successors, (11400), 9957 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 11400 transitions. [2021-12-22 09:36:52,482 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 11400 transitions. Word has length 273 [2021-12-22 09:36:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:36:52,482 INFO L470 AbstractCegarLoop]: Abstraction has 9958 states and 11400 transitions. [2021-12-22 09:36:52,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 11400 transitions. [2021-12-22 09:36:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-12-22 09:36:52,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:36:52,486 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 09:36:52,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:36:52,487 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:36:52,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:36:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1552604812, now seen corresponding path program 1 times [2021-12-22 09:36:52,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:36:52,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127615906] [2021-12-22 09:36:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:52,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:36:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-22 09:36:52,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:36:52,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127615906] [2021-12-22 09:36:52,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127615906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:36:52,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:36:52,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:36:52,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214711385] [2021-12-22 09:36:52,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:36:52,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:36:52,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:36:52,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:36:52,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:36:52,587 INFO L87 Difference]: Start difference. First operand 9958 states and 11400 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:53,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:36:53,973 INFO L93 Difference]: Finished difference Result 24168 states and 28009 transitions. [2021-12-22 09:36:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:36:53,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2021-12-22 09:36:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:36:53,992 INFO L225 Difference]: With dead ends: 24168 [2021-12-22 09:36:53,993 INFO L226 Difference]: Without dead ends: 14212 [2021-12-22 09:36:53,999 INFO L932 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 [2021-12-22 09:36:54,000 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 447 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:36:54,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 371 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:36:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14212 states. [2021-12-22 09:36:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14212 to 13351. [2021-12-22 09:36:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13351 states, 13350 states have (on average 1.1481647940074906) internal successors, (15328), 13350 states have internal predecessors, (15328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13351 states to 13351 states and 15328 transitions. [2021-12-22 09:36:54,133 INFO L78 Accepts]: Start accepts. Automaton has 13351 states and 15328 transitions. Word has length 313 [2021-12-22 09:36:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:36:54,133 INFO L470 AbstractCegarLoop]: Abstraction has 13351 states and 15328 transitions. [2021-12-22 09:36:54,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 13351 states and 15328 transitions. [2021-12-22 09:36:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-12-22 09:36:54,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:36:54,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:36:54,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:36:54,141 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:36:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:36:54,142 INFO L85 PathProgramCache]: Analyzing trace with hash 649706724, now seen corresponding path program 1 times [2021-12-22 09:36:54,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:36:54,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034632022] [2021-12-22 09:36:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:54,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:36:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:36:54,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:36:54,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034632022] [2021-12-22 09:36:54,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034632022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:36:54,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:36:54,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:36:54,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106605674] [2021-12-22 09:36:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:36:54,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:36:54,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:36:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:36:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:36:54,316 INFO L87 Difference]: Start difference. First operand 13351 states and 15328 transitions. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:36:56,668 INFO L93 Difference]: Finished difference Result 33117 states and 38117 transitions. [2021-12-22 09:36:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:36:56,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 380 [2021-12-22 09:36:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:36:56,696 INFO L225 Difference]: With dead ends: 33117 [2021-12-22 09:36:56,696 INFO L226 Difference]: Without dead ends: 19343 [2021-12-22 09:36:56,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:36:56,709 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 636 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:36:56,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 236 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 09:36:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19343 states. [2021-12-22 09:36:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19343 to 19339. [2021-12-22 09:36:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19339 states, 19338 states have (on average 1.1557555072913435) internal successors, (22350), 19338 states have internal predecessors, (22350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19339 states to 19339 states and 22350 transitions. [2021-12-22 09:36:56,958 INFO L78 Accepts]: Start accepts. Automaton has 19339 states and 22350 transitions. Word has length 380 [2021-12-22 09:36:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:36:56,958 INFO L470 AbstractCegarLoop]: Abstraction has 19339 states and 22350 transitions. [2021-12-22 09:36:56,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19339 states and 22350 transitions. [2021-12-22 09:36:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-22 09:36:56,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:36:56,981 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:36:56,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:36:56,981 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:36:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:36:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2143535130, now seen corresponding path program 1 times [2021-12-22 09:36:56,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:36:56,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135282449] [2021-12-22 09:36:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:56,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:36:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-22 09:36:57,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:36:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135282449] [2021-12-22 09:36:57,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135282449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:36:57,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:36:57,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:36:57,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089976416] [2021-12-22 09:36:57,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:36:57,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:36:57,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:36:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:36:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:36:57,182 INFO L87 Difference]: Start difference. First operand 19339 states and 22350 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:58,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:36:58,905 INFO L93 Difference]: Finished difference Result 50180 states and 58000 transitions. [2021-12-22 09:36:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:36:58,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 402 [2021-12-22 09:36:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:36:58,959 INFO L225 Difference]: With dead ends: 50180 [2021-12-22 09:36:58,959 INFO L226 Difference]: Without dead ends: 30843 [2021-12-22 09:36:58,979 INFO L932 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 [2021-12-22 09:36:58,981 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 504 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:36:58,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 270 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:36:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30843 states. [2021-12-22 09:36:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30843 to 30824. [2021-12-22 09:36:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30824 states, 30823 states have (on average 1.141095934853843) internal successors, (35172), 30823 states have internal predecessors, (35172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30824 states to 30824 states and 35172 transitions. [2021-12-22 09:36:59,407 INFO L78 Accepts]: Start accepts. Automaton has 30824 states and 35172 transitions. Word has length 402 [2021-12-22 09:36:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:36:59,407 INFO L470 AbstractCegarLoop]: Abstraction has 30824 states and 35172 transitions. [2021-12-22 09:36:59,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:36:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 30824 states and 35172 transitions. [2021-12-22 09:36:59,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-12-22 09:36:59,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:36:59,418 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:36:59,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:36:59,419 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:36:59,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:36:59,419 INFO L85 PathProgramCache]: Analyzing trace with hash 376628203, now seen corresponding path program 1 times [2021-12-22 09:36:59,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:36:59,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117214576] [2021-12-22 09:36:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:59,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:36:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 222 proven. 82 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 09:36:59,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:36:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117214576] [2021-12-22 09:36:59,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117214576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:36:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121006944] [2021-12-22 09:36:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:36:59,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:36:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:36:59,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:36:59,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:36:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:36:59,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 09:36:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:37:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 222 proven. 82 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 09:37:00,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:37:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 304 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 09:37:01,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121006944] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 09:37:01,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 09:37:01,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-22 09:37:01,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492173232] [2021-12-22 09:37:01,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:01,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:37:01,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:01,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:37:01,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:37:01,466 INFO L87 Difference]: Start difference. First operand 30824 states and 35172 transitions. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:04,406 INFO L93 Difference]: Finished difference Result 88939 states and 101084 transitions. [2021-12-22 09:37:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:37:04,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-12-22 09:37:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:04,463 INFO L225 Difference]: With dead ends: 88939 [2021-12-22 09:37:04,463 INFO L226 Difference]: Without dead ends: 56413 [2021-12-22 09:37:04,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 813 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:37:04,479 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 770 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:04,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 195 Invalid, 2959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 09:37:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56413 states. [2021-12-22 09:37:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56413 to 52153. [2021-12-22 09:37:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52153 states, 52152 states have (on average 1.1363130848289615) internal successors, (59261), 52152 states have internal predecessors, (59261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52153 states to 52153 states and 59261 transitions. [2021-12-22 09:37:05,079 INFO L78 Accepts]: Start accepts. Automaton has 52153 states and 59261 transitions. Word has length 409 [2021-12-22 09:37:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:05,080 INFO L470 AbstractCegarLoop]: Abstraction has 52153 states and 59261 transitions. [2021-12-22 09:37:05,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 52153 states and 59261 transitions. [2021-12-22 09:37:05,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-12-22 09:37:05,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:05,088 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:05,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 09:37:05,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 09:37:05,304 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:05,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash -899581652, now seen corresponding path program 1 times [2021-12-22 09:37:05,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:05,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335964310] [2021-12-22 09:37:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:05,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-22 09:37:05,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:05,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335964310] [2021-12-22 09:37:05,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335964310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:05,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:05,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:05,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105166529] [2021-12-22 09:37:05,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:05,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:05,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:05,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:05,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:05,494 INFO L87 Difference]: Start difference. First operand 52153 states and 59261 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:07,446 INFO L93 Difference]: Finished difference Result 118761 states and 135002 transitions. [2021-12-22 09:37:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:07,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 445 [2021-12-22 09:37:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:07,514 INFO L225 Difference]: With dead ends: 118761 [2021-12-22 09:37:07,514 INFO L226 Difference]: Without dead ends: 60215 [2021-12-22 09:37:07,546 INFO L932 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 [2021-12-22 09:37:07,547 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 498 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:07,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 748 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:37:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60215 states. [2021-12-22 09:37:08,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60215 to 60207. [2021-12-22 09:37:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60207 states, 60206 states have (on average 1.1200046506992658) internal successors, (67431), 60206 states have internal predecessors, (67431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60207 states to 60207 states and 67431 transitions. [2021-12-22 09:37:08,601 INFO L78 Accepts]: Start accepts. Automaton has 60207 states and 67431 transitions. Word has length 445 [2021-12-22 09:37:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:08,602 INFO L470 AbstractCegarLoop]: Abstraction has 60207 states and 67431 transitions. [2021-12-22 09:37:08,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 60207 states and 67431 transitions. [2021-12-22 09:37:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-12-22 09:37:08,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:08,623 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:08,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:37:08,623 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1845596096, now seen corresponding path program 1 times [2021-12-22 09:37:08,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:08,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438054363] [2021-12-22 09:37:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:08,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 603 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 09:37:08,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:08,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438054363] [2021-12-22 09:37:08,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438054363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:08,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:08,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:37:08,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119554696] [2021-12-22 09:37:08,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:08,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:37:08,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:08,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:37:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:37:08,914 INFO L87 Difference]: Start difference. First operand 60207 states and 67431 transitions. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:11,740 INFO L93 Difference]: Finished difference Result 157943 states and 176490 transitions. [2021-12-22 09:37:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:37:11,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 447 [2021-12-22 09:37:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:11,986 INFO L225 Difference]: With dead ends: 157943 [2021-12-22 09:37:11,986 INFO L226 Difference]: Without dead ends: 97738 [2021-12-22 09:37:12,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:37:12,026 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 769 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:12,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 181 Invalid, 2871 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [515 Valid, 2356 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 09:37:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97738 states. [2021-12-22 09:37:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97738 to 93051. [2021-12-22 09:37:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93051 states, 93050 states have (on average 1.1130789897904352) internal successors, (103572), 93050 states have internal predecessors, (103572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93051 states to 93051 states and 103572 transitions. [2021-12-22 09:37:13,217 INFO L78 Accepts]: Start accepts. Automaton has 93051 states and 103572 transitions. Word has length 447 [2021-12-22 09:37:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:13,218 INFO L470 AbstractCegarLoop]: Abstraction has 93051 states and 103572 transitions. [2021-12-22 09:37:13,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 93051 states and 103572 transitions. [2021-12-22 09:37:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-12-22 09:37:13,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:13,229 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:13,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:37:13,229 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:13,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1861468284, now seen corresponding path program 1 times [2021-12-22 09:37:13,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:13,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463422976] [2021-12-22 09:37:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:13,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 373 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-22 09:37:13,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:13,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463422976] [2021-12-22 09:37:13,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463422976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:13,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:13,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:37:13,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546286887] [2021-12-22 09:37:13,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:13,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:37:13,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:13,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:37:13,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:37:13,571 INFO L87 Difference]: Start difference. First operand 93051 states and 103572 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:16,572 INFO L93 Difference]: Finished difference Result 201070 states and 223016 transitions. [2021-12-22 09:37:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:37:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 449 [2021-12-22 09:37:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:16,742 INFO L225 Difference]: With dead ends: 201070 [2021-12-22 09:37:16,742 INFO L226 Difference]: Without dead ends: 108021 [2021-12-22 09:37:16,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:37:16,792 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 867 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:16,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 805 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2882 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:37:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108021 states. [2021-12-22 09:37:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108021 to 93051. [2021-12-22 09:37:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93051 states, 93050 states have (on average 1.112713594841483) internal successors, (103538), 93050 states have internal predecessors, (103538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93051 states to 93051 states and 103538 transitions. [2021-12-22 09:37:18,036 INFO L78 Accepts]: Start accepts. Automaton has 93051 states and 103538 transitions. Word has length 449 [2021-12-22 09:37:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:18,036 INFO L470 AbstractCegarLoop]: Abstraction has 93051 states and 103538 transitions. [2021-12-22 09:37:18,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 93051 states and 103538 transitions. [2021-12-22 09:37:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-12-22 09:37:18,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:18,045 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:18,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:37:18,045 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:18,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:18,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1200421190, now seen corresponding path program 1 times [2021-12-22 09:37:18,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:18,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259029196] [2021-12-22 09:37:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:18,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-22 09:37:18,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:18,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259029196] [2021-12-22 09:37:18,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259029196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:18,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:18,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:18,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747559324] [2021-12-22 09:37:18,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:18,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:18,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:18,349 INFO L87 Difference]: Start difference. First operand 93051 states and 103538 transitions. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:20,375 INFO L93 Difference]: Finished difference Result 193777 states and 215976 transitions. [2021-12-22 09:37:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:20,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 490 [2021-12-22 09:37:20,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:20,495 INFO L225 Difference]: With dead ends: 193777 [2021-12-22 09:37:20,495 INFO L226 Difference]: Without dead ends: 100298 [2021-12-22 09:37:20,545 INFO L932 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 [2021-12-22 09:37:20,546 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 336 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:20,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 796 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:37:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100298 states. [2021-12-22 09:37:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100298 to 96887. [2021-12-22 09:37:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96887 states, 96886 states have (on average 1.1097372169353674) internal successors, (107518), 96886 states have internal predecessors, (107518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96887 states to 96887 states and 107518 transitions. [2021-12-22 09:37:21,762 INFO L78 Accepts]: Start accepts. Automaton has 96887 states and 107518 transitions. Word has length 490 [2021-12-22 09:37:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:21,763 INFO L470 AbstractCegarLoop]: Abstraction has 96887 states and 107518 transitions. [2021-12-22 09:37:21,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 96887 states and 107518 transitions. [2021-12-22 09:37:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-12-22 09:37:21,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:21,772 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:21,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 09:37:21,772 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:21,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2036194230, now seen corresponding path program 1 times [2021-12-22 09:37:21,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:21,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825997737] [2021-12-22 09:37:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:21,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 307 proven. 82 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 09:37:22,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825997737] [2021-12-22 09:37:22,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825997737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:37:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488006904] [2021-12-22 09:37:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:22,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:37:22,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:37:22,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:37:22,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:37:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:22,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:37:22,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:37:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-22 09:37:25,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:37:25,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488006904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:25,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:37:25,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-22 09:37:25,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461278776] [2021-12-22 09:37:25,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:25,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:25,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:25,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:25,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:37:25,093 INFO L87 Difference]: Start difference. First operand 96887 states and 107518 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:25,367 INFO L93 Difference]: Finished difference Result 96967 states and 107599 transitions. [2021-12-22 09:37:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:25,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 503 [2021-12-22 09:37:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:25,473 INFO L225 Difference]: With dead ends: 96967 [2021-12-22 09:37:25,474 INFO L226 Difference]: Without dead ends: 96965 [2021-12-22 09:37:25,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:37:25,504 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 750 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:25,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 852 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 750 Unchecked, 0.0s Time] [2021-12-22 09:37:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96965 states. [2021-12-22 09:37:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96965 to 96965. [2021-12-22 09:37:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96965 states, 96964 states have (on average 1.1096489418753352) internal successors, (107596), 96964 states have internal predecessors, (107596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96965 states to 96965 states and 107596 transitions. [2021-12-22 09:37:26,787 INFO L78 Accepts]: Start accepts. Automaton has 96965 states and 107596 transitions. Word has length 503 [2021-12-22 09:37:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:26,787 INFO L470 AbstractCegarLoop]: Abstraction has 96965 states and 107596 transitions. [2021-12-22 09:37:26,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 96965 states and 107596 transitions. [2021-12-22 09:37:26,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-12-22 09:37:26,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:26,798 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:26,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:37:27,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 09:37:27,016 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:27,017 INFO L85 PathProgramCache]: Analyzing trace with hash 272010830, now seen corresponding path program 1 times [2021-12-22 09:37:27,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:27,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055352259] [2021-12-22 09:37:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:27,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-22 09:37:27,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:27,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055352259] [2021-12-22 09:37:27,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055352259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:27,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:27,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:27,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466292100] [2021-12-22 09:37:27,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:27,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:27,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:27,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:27,170 INFO L87 Difference]: Start difference. First operand 96965 states and 107596 transitions. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:29,387 INFO L93 Difference]: Finished difference Result 207555 states and 230374 transitions. [2021-12-22 09:37:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:29,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 518 [2021-12-22 09:37:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:29,529 INFO L225 Difference]: With dead ends: 207555 [2021-12-22 09:37:29,529 INFO L226 Difference]: Without dead ends: 110592 [2021-12-22 09:37:29,582 INFO L932 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 [2021-12-22 09:37:29,588 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 330 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:29,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 399 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:37:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110592 states. [2021-12-22 09:37:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110592 to 102496. [2021-12-22 09:37:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102496 states, 102495 states have (on average 1.1090882482072295) internal successors, (113676), 102495 states have internal predecessors, (113676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102496 states to 102496 states and 113676 transitions. [2021-12-22 09:37:31,190 INFO L78 Accepts]: Start accepts. Automaton has 102496 states and 113676 transitions. Word has length 518 [2021-12-22 09:37:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:31,191 INFO L470 AbstractCegarLoop]: Abstraction has 102496 states and 113676 transitions. [2021-12-22 09:37:31,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 102496 states and 113676 transitions. [2021-12-22 09:37:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2021-12-22 09:37:31,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:31,202 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:31,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 09:37:31,203 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:31,203 INFO L85 PathProgramCache]: Analyzing trace with hash -229153588, now seen corresponding path program 1 times [2021-12-22 09:37:31,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:31,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060724068] [2021-12-22 09:37:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:31,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 373 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-12-22 09:37:31,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:31,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060724068] [2021-12-22 09:37:31,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060724068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:31,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:31,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:31,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757293591] [2021-12-22 09:37:31,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:31,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:31,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:31,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:31,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:31,349 INFO L87 Difference]: Start difference. First operand 102496 states and 113676 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:33,500 INFO L93 Difference]: Finished difference Result 213514 states and 236408 transitions. [2021-12-22 09:37:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:33,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 534 [2021-12-22 09:37:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:33,652 INFO L225 Difference]: With dead ends: 213514 [2021-12-22 09:37:33,653 INFO L226 Difference]: Without dead ends: 111020 [2021-12-22 09:37:33,703 INFO L932 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 [2021-12-22 09:37:33,703 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 404 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:33,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 388 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:37:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111020 states. [2021-12-22 09:37:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111020 to 102921. [2021-12-22 09:37:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102921 states, 102920 states have (on average 1.108890400310921) internal successors, (114127), 102920 states have internal predecessors, (114127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102921 states to 102921 states and 114127 transitions. [2021-12-22 09:37:35,231 INFO L78 Accepts]: Start accepts. Automaton has 102921 states and 114127 transitions. Word has length 534 [2021-12-22 09:37:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:37:35,231 INFO L470 AbstractCegarLoop]: Abstraction has 102921 states and 114127 transitions. [2021-12-22 09:37:35,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:35,232 INFO L276 IsEmpty]: Start isEmpty. Operand 102921 states and 114127 transitions. [2021-12-22 09:37:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2021-12-22 09:37:35,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:37:35,249 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:37:35,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 09:37:35,249 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:37:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:37:35,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1444719469, now seen corresponding path program 1 times [2021-12-22 09:37:35,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:37:35,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350542872] [2021-12-22 09:37:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:37:35,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:37:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:37:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 755 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-22 09:37:35,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:37:35,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350542872] [2021-12-22 09:37:35,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350542872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:37:35,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:37:35,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:37:35,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154804029] [2021-12-22 09:37:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:37:35,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:37:35,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:37:35,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:37:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:37:35,497 INFO L87 Difference]: Start difference. First operand 102921 states and 114127 transitions. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:37:37,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:37:37,753 INFO L93 Difference]: Finished difference Result 217770 states and 241027 transitions. [2021-12-22 09:37:37,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:37:37,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 581 [2021-12-22 09:37:37,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:37:37,907 INFO L225 Difference]: With dead ends: 217770 [2021-12-22 09:37:37,907 INFO L226 Difference]: Without dead ends: 114851 [2021-12-22 09:37:37,969 INFO L932 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 [2021-12-22 09:37:37,970 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 360 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:37:37,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 342 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:37:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114851 states. [2021-12-22 09:37:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114851 to 102071. [2021-12-22 09:37:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102071 states, 102070 states have (on average 1.1031742921524443) internal successors, (112601), 102070 states have internal predecessors, (112601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)