./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label49.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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_label49.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 efd9f0184b4cf1cfcb5f9b1d78709aac2b2266fe0e62322fe4e22ac75e57a068 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:18:24,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:18:24,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:18:24,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:18:24,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:18:24,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:18:24,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:18:24,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:18:24,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:18:24,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:18:24,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:18:24,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:18:24,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:18:24,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:18:24,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:18:24,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:18:24,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:18:24,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:18:24,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:18:24,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:18:24,164 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:18:24,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:18:24,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:18:24,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:18:24,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:18:24,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:18:24,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:18:24,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:18:24,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:18:24,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:18:24,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:18:24,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:18:24,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:18:24,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:18:24,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:18:24,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:18:24,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:18:24,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:18:24,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:18:24,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:18:24,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:18:24,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:18:24,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:18:24,215 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:18:24,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:18:24,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:18:24,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:18:24,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:18:24,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:18:24,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:18:24,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:18:24,218 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:18:24,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:18:24,220 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:18:24,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:18:24,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:18:24,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:18:24,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:18:24,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:18:24,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:18:24,221 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:18:24,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:18:24,222 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:18:24,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:18:24,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:18:24,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:18:24,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:18:24,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:18:24,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:18:24,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:18:24,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:18:24,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:18:24,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:18:24,224 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:18:24,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:18:24,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:18:24,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efd9f0184b4cf1cfcb5f9b1d78709aac2b2266fe0e62322fe4e22ac75e57a068 [2022-07-13 13:18:24,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:18:24,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:18:24,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:18:24,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:18:24,494 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:18:24,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label49.c [2022-07-13 13:18:24,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36f31b95/7e9df231b86c4c6287998ce3633a1b05/FLAG20fc27803 [2022-07-13 13:18:25,147 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:18:25,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label49.c [2022-07-13 13:18:25,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36f31b95/7e9df231b86c4c6287998ce3633a1b05/FLAG20fc27803 [2022-07-13 13:18:25,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36f31b95/7e9df231b86c4c6287998ce3633a1b05 [2022-07-13 13:18:25,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:18:25,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:18:25,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:18:25,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:18:25,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:18:25,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:18:25" (1/1) ... [2022-07-13 13:18:25,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7c9c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:25, skipping insertion in model container [2022-07-13 13:18:25,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:18:25" (1/1) ... [2022-07-13 13:18:25,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:18:25,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:18:25,692 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_label49.c[2362,2375] [2022-07-13 13:18:26,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:18:26,199 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:18:26,212 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_label49.c[2362,2375] [2022-07-13 13:18:26,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:18:26,465 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:18:26,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26 WrapperNode [2022-07-13 13:18:26,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:18:26,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:18:26,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:18:26,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:18:26,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (1/1) ... [2022-07-13 13:18:26,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (1/1) ... [2022-07-13 13:18:26,808 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-13 13:18:26,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:18:26,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:18:26,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:18:26,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:18:26,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (1/1) ... [2022-07-13 13:18:26,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (1/1) ... [2022-07-13 13:18:26,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (1/1) ... [2022-07-13 13:18:26,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (1/1) ... [2022-07-13 13:18:26,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (1/1) ... [2022-07-13 13:18:27,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (1/1) ... [2022-07-13 13:18:27,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (1/1) ... [2022-07-13 13:18:27,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:18:27,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:18:27,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:18:27,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:18:27,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (1/1) ... [2022-07-13 13:18:27,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:18:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:18:27,106 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) [2022-07-13 13:18:27,114 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 [2022-07-13 13:18:27,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:18:27,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:18:27,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:18:27,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:18:27,210 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:18:27,212 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:18:29,915 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:18:29,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:18:29,934 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:18:29,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:18:29 BoogieIcfgContainer [2022-07-13 13:18:29,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:18:29,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:18:29,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:18:29,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:18:29,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:18:25" (1/3) ... [2022-07-13 13:18:29,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b63cfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:18:29, skipping insertion in model container [2022-07-13 13:18:29,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:26" (2/3) ... [2022-07-13 13:18:29,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b63cfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:18:29, skipping insertion in model container [2022-07-13 13:18:29,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:18:29" (3/3) ... [2022-07-13 13:18:29,946 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label49.c [2022-07-13 13:18:29,958 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:18:29,959 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:18:30,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:18:30,026 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@66be4bb0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@19709d01 [2022-07-13 13:18:30,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:18:30,034 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) [2022-07-13 13:18:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 13:18:30,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:30,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:30,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:30,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:30,047 INFO L85 PathProgramCache]: Analyzing trace with hash -884752143, now seen corresponding path program 1 times [2022-07-13 13:18:30,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:30,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100374164] [2022-07-13 13:18:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:30,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:30,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100374164] [2022-07-13 13:18:30,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100374164] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:30,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:30,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:18:30,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448916928] [2022-07-13 13:18:30,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:30,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:30,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:30,225 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-07-13 13:18:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:32,829 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2022-07-13 13:18:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:32,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2022-07-13 13:18:32,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:32,849 INFO L225 Difference]: With dead ends: 1644 [2022-07-13 13:18:32,849 INFO L226 Difference]: Without dead ends: 977 [2022-07-13 13:18:32,854 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:18:32,857 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 473 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:32,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 13:18:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-07-13 13:18:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2022-07-13 13:18:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 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) [2022-07-13 13:18:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2022-07-13 13:18:32,941 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 15 [2022-07-13 13:18:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:32,941 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2022-07-13 13:18:32,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-07-13 13:18:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2022-07-13 13:18:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 13:18:32,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:32,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:32,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:18:32,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:32,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:32,945 INFO L85 PathProgramCache]: Analyzing trace with hash 732011866, now seen corresponding path program 1 times [2022-07-13 13:18:32,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:32,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096050466] [2022-07-13 13:18:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:32,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:33,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:33,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096050466] [2022-07-13 13:18:33,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096050466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:33,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:33,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:18:33,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811333519] [2022-07-13 13:18:33,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:33,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:33,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:33,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:33,148 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2022-07-13 13:18:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:35,339 INFO L93 Difference]: Finished difference Result 2815 states and 4382 transitions. [2022-07-13 13:18:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 82 [2022-07-13 13:18:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:35,347 INFO L225 Difference]: With dead ends: 2815 [2022-07-13 13:18:35,347 INFO L226 Difference]: Without dead ends: 1846 [2022-07-13 13:18:35,354 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:18:35,356 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:35,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 580 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 13:18:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2022-07-13 13:18:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1841. [2022-07-13 13:18:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.3505434782608696) internal successors, (2485), 1840 states have internal predecessors, (2485), 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) [2022-07-13 13:18:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2485 transitions. [2022-07-13 13:18:35,414 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2485 transitions. Word has length 82 [2022-07-13 13:18:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:35,416 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2485 transitions. [2022-07-13 13:18:35,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2022-07-13 13:18:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2485 transitions. [2022-07-13 13:18:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-13 13:18:35,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:35,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:35,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:18:35,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:35,424 INFO L85 PathProgramCache]: Analyzing trace with hash 550978212, now seen corresponding path program 1 times [2022-07-13 13:18:35,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:35,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649804876] [2022-07-13 13:18:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:35,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:35,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:35,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649804876] [2022-07-13 13:18:35,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649804876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:35,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:35,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:35,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447323519] [2022-07-13 13:18:35,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:35,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:18:35,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:35,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:18:35,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:18:35,593 INFO L87 Difference]: Start difference. First operand 1841 states and 2485 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-07-13 13:18:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:39,066 INFO L93 Difference]: Finished difference Result 6765 states and 9262 transitions. [2022-07-13 13:18:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:18:39,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2022-07-13 13:18:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:39,084 INFO L225 Difference]: With dead ends: 6765 [2022-07-13 13:18:39,084 INFO L226 Difference]: Without dead ends: 4926 [2022-07-13 13:18:39,087 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:18:39,088 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 898 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:39,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 329 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-13 13:18:39,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2022-07-13 13:18:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4875. [2022-07-13 13:18:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.2866228970045137) internal successors, (6271), 4874 states have internal predecessors, (6271), 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) [2022-07-13 13:18:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 6271 transitions. [2022-07-13 13:18:39,170 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 6271 transitions. Word has length 85 [2022-07-13 13:18:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:39,171 INFO L495 AbstractCegarLoop]: Abstraction has 4875 states and 6271 transitions. [2022-07-13 13:18:39,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-07-13 13:18:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 6271 transitions. [2022-07-13 13:18:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-13 13:18:39,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:39,174 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:39,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:18:39,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:39,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:39,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1065973743, now seen corresponding path program 1 times [2022-07-13 13:18:39,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:39,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880359831] [2022-07-13 13:18:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:39,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-13 13:18:39,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:39,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880359831] [2022-07-13 13:18:39,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880359831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:39,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:39,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:18:39,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836337077] [2022-07-13 13:18:39,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:39,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:39,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:39,378 INFO L87 Difference]: Start difference. First operand 4875 states and 6271 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2022-07-13 13:18:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:41,286 INFO L93 Difference]: Finished difference Result 14436 states and 18544 transitions. [2022-07-13 13:18:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:41,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 156 [2022-07-13 13:18:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:41,316 INFO L225 Difference]: With dead ends: 14436 [2022-07-13 13:18:41,317 INFO L226 Difference]: Without dead ends: 8277 [2022-07-13 13:18:41,325 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:18:41,334 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:41,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 13:18:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2022-07-13 13:18:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 6144. [2022-07-13 13:18:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6144 states, 6143 states have (on average 1.1909490476965652) internal successors, (7316), 6143 states have internal predecessors, (7316), 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) [2022-07-13 13:18:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6144 states to 6144 states and 7316 transitions. [2022-07-13 13:18:41,449 INFO L78 Accepts]: Start accepts. Automaton has 6144 states and 7316 transitions. Word has length 156 [2022-07-13 13:18:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:41,450 INFO L495 AbstractCegarLoop]: Abstraction has 6144 states and 7316 transitions. [2022-07-13 13:18:41,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2022-07-13 13:18:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 6144 states and 7316 transitions. [2022-07-13 13:18:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-13 13:18:41,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:41,455 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:41,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:18:41,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:41,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:41,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1239550733, now seen corresponding path program 1 times [2022-07-13 13:18:41,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:41,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178751793] [2022-07-13 13:18:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:41,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 13:18:41,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:41,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178751793] [2022-07-13 13:18:41,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178751793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:41,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:41,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:41,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459075953] [2022-07-13 13:18:41,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:41,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:41,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:41,608 INFO L87 Difference]: Start difference. First operand 6144 states and 7316 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2022-07-13 13:18:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:43,724 INFO L93 Difference]: Finished difference Result 15306 states and 18462 transitions. [2022-07-13 13:18:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:43,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 169 [2022-07-13 13:18:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:43,751 INFO L225 Difference]: With dead ends: 15306 [2022-07-13 13:18:43,752 INFO L226 Difference]: Without dead ends: 9164 [2022-07-13 13:18:43,761 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:18:43,761 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 502 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:43,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 454 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 13:18:43,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9164 states. [2022-07-13 13:18:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9164 to 8291. [2022-07-13 13:18:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8291 states, 8290 states have (on average 1.216043425814234) internal successors, (10081), 8290 states have internal predecessors, (10081), 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) [2022-07-13 13:18:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8291 states to 8291 states and 10081 transitions. [2022-07-13 13:18:43,884 INFO L78 Accepts]: Start accepts. Automaton has 8291 states and 10081 transitions. Word has length 169 [2022-07-13 13:18:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:43,885 INFO L495 AbstractCegarLoop]: Abstraction has 8291 states and 10081 transitions. [2022-07-13 13:18:43,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2022-07-13 13:18:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 8291 states and 10081 transitions. [2022-07-13 13:18:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-13 13:18:43,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:43,894 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:43,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:18:43,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:43,896 INFO L85 PathProgramCache]: Analyzing trace with hash -830729473, now seen corresponding path program 1 times [2022-07-13 13:18:43,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:43,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344472084] [2022-07-13 13:18:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:43,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 13:18:44,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344472084] [2022-07-13 13:18:44,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344472084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:44,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:44,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:44,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847311118] [2022-07-13 13:18:44,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:44,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:44,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:44,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:44,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:44,018 INFO L87 Difference]: Start difference. First operand 8291 states and 10081 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2022-07-13 13:18:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:45,702 INFO L93 Difference]: Finished difference Result 21259 states and 26395 transitions. [2022-07-13 13:18:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:45,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 172 [2022-07-13 13:18:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:45,734 INFO L225 Difference]: With dead ends: 21259 [2022-07-13 13:18:45,735 INFO L226 Difference]: Without dead ends: 12970 [2022-07-13 13:18:45,744 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:18:45,745 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 490 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:45,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 799 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:18:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12970 states. [2022-07-13 13:18:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12970 to 12970. [2022-07-13 13:18:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12970 states, 12969 states have (on average 1.1981648546534043) internal successors, (15539), 12969 states have internal predecessors, (15539), 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) [2022-07-13 13:18:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12970 states to 12970 states and 15539 transitions. [2022-07-13 13:18:45,930 INFO L78 Accepts]: Start accepts. Automaton has 12970 states and 15539 transitions. Word has length 172 [2022-07-13 13:18:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:45,931 INFO L495 AbstractCegarLoop]: Abstraction has 12970 states and 15539 transitions. [2022-07-13 13:18:45,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2022-07-13 13:18:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 12970 states and 15539 transitions. [2022-07-13 13:18:45,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-13 13:18:45,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:45,935 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-13 13:18:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:18:45,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash -688792282, now seen corresponding path program 1 times [2022-07-13 13:18:45,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:45,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54754244] [2022-07-13 13:18:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 164 proven. 70 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 13:18:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54754244] [2022-07-13 13:18:46,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54754244] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:18:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87977770] [2022-07-13 13:18:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:46,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:18:46,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:18:46,090 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) [2022-07-13 13:18:46,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 13:18:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:18:46,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:18:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 164 proven. 70 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 13:18:46,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:18:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 13:18:47,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87977770] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:18:47,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:18:47,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-13 13:18:47,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267466350] [2022-07-13 13:18:47,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:47,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:18:47,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:47,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:18:47,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:18:47,005 INFO L87 Difference]: Start difference. First operand 12970 states and 15539 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-07-13 13:18:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:50,633 INFO L93 Difference]: Finished difference Result 37036 states and 44927 transitions. [2022-07-13 13:18:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:18:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 239 [2022-07-13 13:18:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:50,677 INFO L225 Difference]: With dead ends: 37036 [2022-07-13 13:18:50,677 INFO L226 Difference]: Without dead ends: 22759 [2022-07-13 13:18:50,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 473 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:18:50,694 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1078 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:50,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 148 Invalid, 3531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-13 13:18:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22759 states. [2022-07-13 13:18:51,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22759 to 22753. [2022-07-13 13:18:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22753 states, 22752 states have (on average 1.1602496483825597) internal successors, (26398), 22752 states have internal predecessors, (26398), 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) [2022-07-13 13:18:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22753 states to 22753 states and 26398 transitions. [2022-07-13 13:18:51,063 INFO L78 Accepts]: Start accepts. Automaton has 22753 states and 26398 transitions. Word has length 239 [2022-07-13 13:18:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:51,063 INFO L495 AbstractCegarLoop]: Abstraction has 22753 states and 26398 transitions. [2022-07-13 13:18:51,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-07-13 13:18:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 22753 states and 26398 transitions. [2022-07-13 13:18:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-07-13 13:18:51,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:51,068 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-13 13:18:51,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 13:18:51,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:18:51,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1742726696, now seen corresponding path program 1 times [2022-07-13 13:18:51,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:51,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994841761] [2022-07-13 13:18:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:51,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:51,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994841761] [2022-07-13 13:18:51,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994841761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:51,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:51,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:51,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847457478] [2022-07-13 13:18:51,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:51,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:51,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:51,453 INFO L87 Difference]: Start difference. First operand 22753 states and 26398 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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) [2022-07-13 13:18:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:53,181 INFO L93 Difference]: Finished difference Result 51932 states and 60510 transitions. [2022-07-13 13:18:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:53,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 272 [2022-07-13 13:18:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:53,235 INFO L225 Difference]: With dead ends: 51932 [2022-07-13 13:18:53,235 INFO L226 Difference]: Without dead ends: 28329 [2022-07-13 13:18:53,261 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:18:53,263 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 301 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:53,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 778 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:18:53,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28329 states. [2022-07-13 13:18:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28329 to 27895. [2022-07-13 13:18:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27895 states, 27894 states have (on average 1.1442604144260415) internal successors, (31918), 27894 states have internal predecessors, (31918), 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) [2022-07-13 13:18:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27895 states to 27895 states and 31918 transitions. [2022-07-13 13:18:53,725 INFO L78 Accepts]: Start accepts. Automaton has 27895 states and 31918 transitions. Word has length 272 [2022-07-13 13:18:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:53,726 INFO L495 AbstractCegarLoop]: Abstraction has 27895 states and 31918 transitions. [2022-07-13 13:18:53,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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) [2022-07-13 13:18:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 27895 states and 31918 transitions. [2022-07-13 13:18:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-07-13 13:18:53,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:53,734 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:53,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:18:53,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:53,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:53,735 INFO L85 PathProgramCache]: Analyzing trace with hash 914567840, now seen corresponding path program 1 times [2022-07-13 13:18:53,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:53,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211938204] [2022-07-13 13:18:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:53,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-13 13:18:54,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:54,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211938204] [2022-07-13 13:18:54,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211938204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:54,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:54,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:54,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947157628] [2022-07-13 13:18:54,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:54,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:54,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:54,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:54,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:54,011 INFO L87 Difference]: Start difference. First operand 27895 states and 31918 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-07-13 13:18:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:55,975 INFO L93 Difference]: Finished difference Result 66017 states and 75501 transitions. [2022-07-13 13:18:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:55,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 333 [2022-07-13 13:18:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:56,027 INFO L225 Difference]: With dead ends: 66017 [2022-07-13 13:18:56,028 INFO L226 Difference]: Without dead ends: 37699 [2022-07-13 13:18:56,051 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:18:56,052 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 484 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:56,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 275 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 13:18:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37699 states. [2022-07-13 13:18:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37699 to 36822. [2022-07-13 13:18:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36822 states, 36821 states have (on average 1.1376931642269357) internal successors, (41891), 36821 states have internal predecessors, (41891), 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) [2022-07-13 13:18:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36822 states to 36822 states and 41891 transitions. [2022-07-13 13:18:56,577 INFO L78 Accepts]: Start accepts. Automaton has 36822 states and 41891 transitions. Word has length 333 [2022-07-13 13:18:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:56,578 INFO L495 AbstractCegarLoop]: Abstraction has 36822 states and 41891 transitions. [2022-07-13 13:18:56,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-07-13 13:18:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand 36822 states and 41891 transitions. [2022-07-13 13:18:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-07-13 13:18:56,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:56,586 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-13 13:18:56,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 13:18:56,587 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:56,588 INFO L85 PathProgramCache]: Analyzing trace with hash -245028848, now seen corresponding path program 1 times [2022-07-13 13:18:56,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:56,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134189594] [2022-07-13 13:18:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:56,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-13 13:18:56,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:56,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134189594] [2022-07-13 13:18:56,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134189594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:56,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:56,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:56,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103860207] [2022-07-13 13:18:56,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:56,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:56,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:56,857 INFO L87 Difference]: Start difference. First operand 36822 states and 41891 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2022-07-13 13:18:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:58,485 INFO L93 Difference]: Finished difference Result 82137 states and 93800 transitions. [2022-07-13 13:18:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:58,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 354 [2022-07-13 13:18:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:58,536 INFO L225 Difference]: With dead ends: 82137 [2022-07-13 13:18:58,537 INFO L226 Difference]: Without dead ends: 45317 [2022-07-13 13:18:58,567 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:18:58,568 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 272 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:58,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 789 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:18:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45317 states. [2022-07-13 13:18:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45317 to 45317. [2022-07-13 13:18:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45317 states, 45316 states have (on average 1.1218333480448406) internal successors, (50837), 45316 states have internal predecessors, (50837), 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) [2022-07-13 13:18:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45317 states to 45317 states and 50837 transitions. [2022-07-13 13:18:59,081 INFO L78 Accepts]: Start accepts. Automaton has 45317 states and 50837 transitions. Word has length 354 [2022-07-13 13:18:59,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:59,082 INFO L495 AbstractCegarLoop]: Abstraction has 45317 states and 50837 transitions. [2022-07-13 13:18:59,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2022-07-13 13:18:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 45317 states and 50837 transitions. [2022-07-13 13:18:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-07-13 13:18:59,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:59,092 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:59,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 13:18:59,093 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:59,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:59,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2035165701, now seen corresponding path program 1 times [2022-07-13 13:18:59,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:59,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466573695] [2022-07-13 13:18:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:59,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:18:59,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:59,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466573695] [2022-07-13 13:18:59,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466573695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:59,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:59,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:59,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534130074] [2022-07-13 13:18:59,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:59,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:59,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:59,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:59,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:59,269 INFO L87 Difference]: Start difference. First operand 45317 states and 50837 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2022-07-13 13:19:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:01,208 INFO L93 Difference]: Finished difference Result 104723 states and 117661 transitions. [2022-07-13 13:19:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 377 [2022-07-13 13:19:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:01,277 INFO L225 Difference]: With dead ends: 104723 [2022-07-13 13:19:01,278 INFO L226 Difference]: Without dead ends: 59408 [2022-07-13 13:19:01,307 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:19:01,307 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 335 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:01,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 653 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:19:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59408 states. [2022-07-13 13:19:02,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59408 to 56825. [2022-07-13 13:19:02,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56825 states, 56824 states have (on average 1.1257919189075039) internal successors, (63972), 56824 states have internal predecessors, (63972), 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) [2022-07-13 13:19:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56825 states to 56825 states and 63972 transitions. [2022-07-13 13:19:02,145 INFO L78 Accepts]: Start accepts. Automaton has 56825 states and 63972 transitions. Word has length 377 [2022-07-13 13:19:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:02,146 INFO L495 AbstractCegarLoop]: Abstraction has 56825 states and 63972 transitions. [2022-07-13 13:19:02,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2022-07-13 13:19:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 56825 states and 63972 transitions. [2022-07-13 13:19:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2022-07-13 13:19:02,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:02,161 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-13 13:19:02,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 13:19:02,161 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1342155775, now seen corresponding path program 1 times [2022-07-13 13:19:02,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437211152] [2022-07-13 13:19:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:02,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:19:02,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:02,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437211152] [2022-07-13 13:19:02,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437211152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:02,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:02,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:02,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207337096] [2022-07-13 13:19:02,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:02,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:02,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:02,426 INFO L87 Difference]: Start difference. First operand 56825 states and 63972 transitions. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 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) [2022-07-13 13:19:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:05,837 INFO L93 Difference]: Finished difference Result 142214 states and 159746 transitions. [2022-07-13 13:19:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:05,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 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 420 [2022-07-13 13:19:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:05,927 INFO L225 Difference]: With dead ends: 142214 [2022-07-13 13:19:05,928 INFO L226 Difference]: Without dead ends: 84966 [2022-07-13 13:19:05,941 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:19:05,942 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 813 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:05,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 165 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 2543 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 13:19:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84966 states. [2022-07-13 13:19:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84966 to 76387. [2022-07-13 13:19:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76387 states, 76386 states have (on average 1.1186212133113398) internal successors, (85447), 76386 states have internal predecessors, (85447), 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) [2022-07-13 13:19:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76387 states to 76387 states and 85447 transitions. [2022-07-13 13:19:06,964 INFO L78 Accepts]: Start accepts. Automaton has 76387 states and 85447 transitions. Word has length 420 [2022-07-13 13:19:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:06,965 INFO L495 AbstractCegarLoop]: Abstraction has 76387 states and 85447 transitions. [2022-07-13 13:19:06,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 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) [2022-07-13 13:19:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 76387 states and 85447 transitions. [2022-07-13 13:19:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-07-13 13:19:06,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:06,977 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:06,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 13:19:06,978 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:06,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1101500681, now seen corresponding path program 1 times [2022-07-13 13:19:06,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:06,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064335522] [2022-07-13 13:19:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:06,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:19:07,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:07,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064335522] [2022-07-13 13:19:07,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064335522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:07,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:07,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 13:19:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776982008] [2022-07-13 13:19:07,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:07,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 13:19:07,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:07,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 13:19:07,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:19:07,350 INFO L87 Difference]: Start difference. First operand 76387 states and 85447 transitions. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 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) [2022-07-13 13:19:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:10,887 INFO L93 Difference]: Finished difference Result 177078 states and 198314 transitions. [2022-07-13 13:19:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 13:19:10,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 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 427 [2022-07-13 13:19:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:11,065 INFO L225 Difference]: With dead ends: 177078 [2022-07-13 13:19:11,065 INFO L226 Difference]: Without dead ends: 100693 [2022-07-13 13:19:11,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:19:11,389 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 1114 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 3261 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 3722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 3261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:11,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 187 Invalid, 3722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 3261 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-13 13:19:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100693 states. [2022-07-13 13:19:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100693 to 91743. [2022-07-13 13:19:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91743 states, 91742 states have (on average 1.1246539207778334) internal successors, (103178), 91742 states have internal predecessors, (103178), 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) [2022-07-13 13:19:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91743 states to 91743 states and 103178 transitions. [2022-07-13 13:19:12,656 INFO L78 Accepts]: Start accepts. Automaton has 91743 states and 103178 transitions. Word has length 427 [2022-07-13 13:19:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:12,656 INFO L495 AbstractCegarLoop]: Abstraction has 91743 states and 103178 transitions. [2022-07-13 13:19:12,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 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) [2022-07-13 13:19:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 91743 states and 103178 transitions. [2022-07-13 13:19:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-07-13 13:19:12,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:12,667 INFO L195 NwaCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2022-07-13 13:19:12,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 13:19:12,667 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1041711692, now seen corresponding path program 1 times [2022-07-13 13:19:12,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:12,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891693513] [2022-07-13 13:19:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:12,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 459 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-07-13 13:19:12,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891693513] [2022-07-13 13:19:12,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891693513] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:12,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:12,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:19:12,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374480653] [2022-07-13 13:19:12,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:12,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:12,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:12,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:12,843 INFO L87 Difference]: Start difference. First operand 91743 states and 103178 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2022-07-13 13:19:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:14,147 INFO L93 Difference]: Finished difference Result 180064 states and 202010 transitions. [2022-07-13 13:19:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:14,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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 441 [2022-07-13 13:19:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:14,240 INFO L225 Difference]: With dead ends: 180064 [2022-07-13 13:19:14,240 INFO L226 Difference]: Without dead ends: 88323 [2022-07-13 13:19:14,283 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:19:14,283 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 632 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:14,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 108 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 13:19:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88323 states. [2022-07-13 13:19:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88323 to 86189. [2022-07-13 13:19:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86189 states, 86188 states have (on average 1.1202951687009792) internal successors, (96556), 86188 states have internal predecessors, (96556), 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) [2022-07-13 13:19:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86189 states to 86189 states and 96556 transitions. [2022-07-13 13:19:15,477 INFO L78 Accepts]: Start accepts. Automaton has 86189 states and 96556 transitions. Word has length 441 [2022-07-13 13:19:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:15,477 INFO L495 AbstractCegarLoop]: Abstraction has 86189 states and 96556 transitions. [2022-07-13 13:19:15,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2022-07-13 13:19:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 86189 states and 96556 transitions. [2022-07-13 13:19:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-07-13 13:19:15,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:15,487 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-07-13 13:19:15,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 13:19:15,487 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:15,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:15,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1617215359, now seen corresponding path program 1 times [2022-07-13 13:19:15,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:15,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727346480] [2022-07-13 13:19:15,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:15,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 313 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-13 13:19:15,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:15,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727346480] [2022-07-13 13:19:15,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727346480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:15,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:15,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:15,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099248079] [2022-07-13 13:19:15,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:15,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:15,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:15,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:15,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:15,914 INFO L87 Difference]: Start difference. First operand 86189 states and 96556 transitions. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 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) [2022-07-13 13:19:19,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:19,092 INFO L93 Difference]: Finished difference Result 201378 states and 224872 transitions. [2022-07-13 13:19:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:19,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 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 459 [2022-07-13 13:19:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:19,224 INFO L225 Difference]: With dead ends: 201378 [2022-07-13 13:19:19,225 INFO L226 Difference]: Without dead ends: 111783 [2022-07-13 13:19:19,272 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:19:19,272 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 774 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:19,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 249 Invalid, 2976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 13:19:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111783 states. [2022-07-13 13:19:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111783 to 107891. [2022-07-13 13:19:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107891 states, 107890 states have (on average 1.113161553434053) internal successors, (120099), 107890 states have internal predecessors, (120099), 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) [2022-07-13 13:19:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107891 states to 107891 states and 120099 transitions. [2022-07-13 13:19:20,851 INFO L78 Accepts]: Start accepts. Automaton has 107891 states and 120099 transitions. Word has length 459 [2022-07-13 13:19:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:20,852 INFO L495 AbstractCegarLoop]: Abstraction has 107891 states and 120099 transitions. [2022-07-13 13:19:20,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 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) [2022-07-13 13:19:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 107891 states and 120099 transitions. [2022-07-13 13:19:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-07-13 13:19:20,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:20,864 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-13 13:19:20,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 13:19:20,864 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:20,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash 972152963, now seen corresponding path program 1 times [2022-07-13 13:19:20,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:20,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834641585] [2022-07-13 13:19:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:20,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 255 proven. 82 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 13:19:21,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:21,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834641585] [2022-07-13 13:19:21,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834641585] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:19:21,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646503683] [2022-07-13 13:19:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:21,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:19:21,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:19:21,412 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) [2022-07-13 13:19:21,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 13:19:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:21,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 13:19:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:19:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:19:26,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:19:26,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646503683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:26,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:19:26,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-13 13:19:26,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635391324] [2022-07-13 13:19:26,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:26,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:26,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:19:26,311 INFO L87 Difference]: Start difference. First operand 107891 states and 120099 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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) [2022-07-13 13:19:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:28,818 INFO L93 Difference]: Finished difference Result 226887 states and 252354 transitions. [2022-07-13 13:19:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:28,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 470 [2022-07-13 13:19:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:28,959 INFO L225 Difference]: With dead ends: 226887 [2022-07-13 13:19:28,960 INFO L226 Difference]: Without dead ends: 118998 [2022-07-13 13:19:29,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:19:29,026 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 233 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:29,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 367 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:19:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118998 states. [2022-07-13 13:19:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118998 to 115570. [2022-07-13 13:19:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115570 states, 115569 states have (on average 1.1057550035044) internal successors, (127791), 115569 states have internal predecessors, (127791), 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) [2022-07-13 13:19:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115570 states to 115570 states and 127791 transitions. [2022-07-13 13:19:30,708 INFO L78 Accepts]: Start accepts. Automaton has 115570 states and 127791 transitions. Word has length 470 [2022-07-13 13:19:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:30,709 INFO L495 AbstractCegarLoop]: Abstraction has 115570 states and 127791 transitions. [2022-07-13 13:19:30,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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) [2022-07-13 13:19:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 115570 states and 127791 transitions. [2022-07-13 13:19:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-07-13 13:19:30,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:30,725 INFO L195 NwaCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:30,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 13:19:30,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 13:19:30,926 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:30,927 INFO L85 PathProgramCache]: Analyzing trace with hash -177803075, now seen corresponding path program 1 times [2022-07-13 13:19:30,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:30,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874734474] [2022-07-13 13:19:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:30,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 542 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-07-13 13:19:31,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:31,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874734474] [2022-07-13 13:19:31,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874734474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:31,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:31,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:31,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897973202] [2022-07-13 13:19:31,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:31,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:31,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:31,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:31,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:31,133 INFO L87 Difference]: Start difference. First operand 115570 states and 127791 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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) [2022-07-13 13:19:33,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:33,453 INFO L93 Difference]: Finished difference Result 243465 states and 268931 transitions. [2022-07-13 13:19:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 507 [2022-07-13 13:19:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:33,606 INFO L225 Difference]: With dead ends: 243465 [2022-07-13 13:19:33,607 INFO L226 Difference]: Without dead ends: 127897 [2022-07-13 13:19:34,020 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:19:34,022 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 402 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:34,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 332 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:19:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127897 states. [2022-07-13 13:19:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127897 to 123211. [2022-07-13 13:19:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123211 states, 123210 states have (on average 1.0997483970456943) internal successors, (135500), 123210 states have internal predecessors, (135500), 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) [2022-07-13 13:19:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123211 states to 123211 states and 135500 transitions. [2022-07-13 13:19:35,391 INFO L78 Accepts]: Start accepts. Automaton has 123211 states and 135500 transitions. Word has length 507 [2022-07-13 13:19:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:35,391 INFO L495 AbstractCegarLoop]: Abstraction has 123211 states and 135500 transitions. [2022-07-13 13:19:35,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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) [2022-07-13 13:19:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 123211 states and 135500 transitions. [2022-07-13 13:19:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-07-13 13:19:35,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:35,406 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:19:35,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 13:19:35,406 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash 68403437, now seen corresponding path program 1 times [2022-07-13 13:19:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:35,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479647763] [2022-07-13 13:19:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:35,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-13 13:19:36,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:36,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479647763] [2022-07-13 13:19:36,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479647763] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:36,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:36,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955733599] [2022-07-13 13:19:36,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:36,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:36,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:36,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:36,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:36,029 INFO L87 Difference]: Start difference. First operand 123211 states and 135500 transitions. Second operand has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 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) [2022-07-13 13:19:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:39,692 INFO L93 Difference]: Finished difference Result 274974 states and 302066 transitions. [2022-07-13 13:19:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 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 539 [2022-07-13 13:19:39,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:39,872 INFO L225 Difference]: With dead ends: 274974 [2022-07-13 13:19:39,872 INFO L226 Difference]: Without dead ends: 149212 [2022-07-13 13:19:39,916 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:19:39,917 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 778 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:39,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 186 Invalid, 2961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-13 13:19:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149212 states. [2022-07-13 13:19:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149212 to 147450. [2022-07-13 13:19:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147450 states, 147449 states have (on average 1.0971047616463998) internal successors, (161767), 147449 states have internal predecessors, (161767), 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) [2022-07-13 13:19:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147450 states to 147450 states and 161767 transitions. [2022-07-13 13:19:41,844 INFO L78 Accepts]: Start accepts. Automaton has 147450 states and 161767 transitions. Word has length 539 [2022-07-13 13:19:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:41,845 INFO L495 AbstractCegarLoop]: Abstraction has 147450 states and 161767 transitions. [2022-07-13 13:19:41,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 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) [2022-07-13 13:19:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 147450 states and 161767 transitions. [2022-07-13 13:19:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-07-13 13:19:41,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:41,860 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-07-13 13:19:41,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 13:19:41,860 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:41,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1633858475, now seen corresponding path program 1 times [2022-07-13 13:19:41,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:41,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232716415] [2022-07-13 13:19:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:41,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 386 proven. 13 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-13 13:19:42,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:42,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232716415] [2022-07-13 13:19:42,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232716415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:19:42,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299627088] [2022-07-13 13:19:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:42,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:19:42,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:19:42,076 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:19:42,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 13:19:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:19:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:19:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 386 proven. 13 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-13 13:19:43,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:19:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-13 13:19:45,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299627088] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:19:45,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:19:45,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2022-07-13 13:19:45,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569963456] [2022-07-13 13:19:45,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:45,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:45,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:19:45,037 INFO L87 Difference]: Start difference. First operand 147450 states and 161767 transitions. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 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) [2022-07-13 13:19:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:48,535 INFO L93 Difference]: Finished difference Result 307689 states and 337310 transitions. [2022-07-13 13:19:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:48,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 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 547 [2022-07-13 13:19:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:49,001 INFO L225 Difference]: With dead ends: 307689 [2022-07-13 13:19:49,002 INFO L226 Difference]: Without dead ends: 159816 [2022-07-13 13:19:49,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1097 GetRequests, 1090 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:19:49,084 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1090 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:49,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 110 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 13:19:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159816 states. [2022-07-13 13:19:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159816 to 150000. [2022-07-13 13:19:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150000 states, 149999 states have (on average 1.0968139787598583) internal successors, (164521), 149999 states have internal predecessors, (164521), 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) [2022-07-13 13:19:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150000 states to 150000 states and 164521 transitions. [2022-07-13 13:19:51,279 INFO L78 Accepts]: Start accepts. Automaton has 150000 states and 164521 transitions. Word has length 547 [2022-07-13 13:19:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:51,279 INFO L495 AbstractCegarLoop]: Abstraction has 150000 states and 164521 transitions. [2022-07-13 13:19:51,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 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) [2022-07-13 13:19:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 150000 states and 164521 transitions. [2022-07-13 13:19:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2022-07-13 13:19:51,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:51,295 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:19:51,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 13:19:51,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:19:51,497 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1410759560, now seen corresponding path program 1 times [2022-07-13 13:19:51,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:51,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799271587] [2022-07-13 13:19:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:51,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-13 13:19:51,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:51,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799271587] [2022-07-13 13:19:51,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799271587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:51,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:51,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:51,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804706435] [2022-07-13 13:19:51,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:51,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:51,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:51,694 INFO L87 Difference]: Start difference. First operand 150000 states and 164521 transitions. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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) [2022-07-13 13:19:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:54,093 INFO L93 Difference]: Finished difference Result 297858 states and 326073 transitions. [2022-07-13 13:19:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:54,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 557 [2022-07-13 13:19:54,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:54,282 INFO L225 Difference]: With dead ends: 297858 [2022-07-13 13:19:54,282 INFO L226 Difference]: Without dead ends: 147860 [2022-07-13 13:19:54,353 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:19:54,354 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 230 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:54,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 281 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:19:54,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147860 states. [2022-07-13 13:19:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147860 to 130781. [2022-07-13 13:19:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130781 states, 130780 states have (on average 1.0915965743997553) internal successors, (142759), 130780 states have internal predecessors, (142759), 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) [2022-07-13 13:19:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130781 states to 130781 states and 142759 transitions. [2022-07-13 13:19:56,457 INFO L78 Accepts]: Start accepts. Automaton has 130781 states and 142759 transitions. Word has length 557 [2022-07-13 13:19:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:56,457 INFO L495 AbstractCegarLoop]: Abstraction has 130781 states and 142759 transitions. [2022-07-13 13:19:56,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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) [2022-07-13 13:19:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 130781 states and 142759 transitions. [2022-07-13 13:19:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2022-07-13 13:19:56,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:56,477 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:19:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 13:19:56,478 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash -39339155, now seen corresponding path program 1 times [2022-07-13 13:19:56,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:56,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006433929] [2022-07-13 13:19:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:56,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-13 13:19:56,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:56,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006433929] [2022-07-13 13:19:56,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006433929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:56,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:56,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:56,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076475897] [2022-07-13 13:19:56,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:56,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:56,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:56,702 INFO L87 Difference]: Start difference. First operand 130781 states and 142759 transitions. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 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) [2022-07-13 13:19:59,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:59,130 INFO L93 Difference]: Finished difference Result 286248 states and 312487 transitions. [2022-07-13 13:19:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 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 576 [2022-07-13 13:19:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:59,339 INFO L225 Difference]: With dead ends: 286248 [2022-07-13 13:19:59,339 INFO L226 Difference]: Without dead ends: 155468 [2022-07-13 13:19:59,432 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:19:59,432 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 272 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:59,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 333 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:19:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155468 states.