./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.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 17ba764d4851428799f2c4794a4662e2753aae472d291b23839dac79bbfbab6d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:24:16,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:24:16,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:24:17,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:24:17,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:24:17,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:24:17,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:24:17,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:24:17,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:24:17,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:24:17,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:24:17,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:24:17,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:24:17,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:24:17,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:24:17,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:24:17,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:24:17,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:24:17,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:24:17,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:24:17,041 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:24:17,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:24:17,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:24:17,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:24:17,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:24:17,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:24:17,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:24:17,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:24:17,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:24:17,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:24:17,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:24:17,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:24:17,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:24:17,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:24:17,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:24:17,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:24:17,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:24:17,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:24:17,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:24:17,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:24:17,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:24:17,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:24:17,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:24:17,114 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:24:17,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:24:17,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:24:17,115 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:24:17,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:24:17,116 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:24:17,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:24:17,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:24:17,118 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:24:17,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:24:17,119 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:24:17,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:24:17,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:24:17,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:24:17,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:24:17,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:24:17,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:24:17,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:24:17,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:24:17,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:24:17,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:24:17,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:24:17,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:24:17,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:24:17,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:24:17,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:24:17,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:24:17,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:24:17,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:24:17,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:24:17,124 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:24:17,124 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:24:17,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:24:17,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17ba764d4851428799f2c4794a4662e2753aae472d291b23839dac79bbfbab6d [2022-07-21 05:24:17,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:24:17,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:24:17,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:24:17,481 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:24:17,481 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:24:17,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2022-07-21 05:24:17,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e09043d11/054b778afde6480e8bdb74590485334c/FLAGc06959f7f [2022-07-21 05:24:18,062 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:24:18,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2022-07-21 05:24:18,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e09043d11/054b778afde6480e8bdb74590485334c/FLAGc06959f7f [2022-07-21 05:24:18,432 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e09043d11/054b778afde6480e8bdb74590485334c [2022-07-21 05:24:18,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:24:18,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:24:18,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:24:18,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:24:18,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:24:18,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1bd74b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18, skipping insertion in model container [2022-07-21 05:24:18,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:24:18,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:24:18,708 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/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c[9392,9405] [2022-07-21 05:24:18,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:24:18,722 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:24:18,788 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/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c[9392,9405] [2022-07-21 05:24:18,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:24:18,801 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:24:18,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18 WrapperNode [2022-07-21 05:24:18,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:24:18,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:24:18,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:24:18,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:24:18,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,877 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 319 [2022-07-21 05:24:18,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:24:18,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:24:18,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:24:18,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:24:18,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:24:18,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:24:18,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:24:18,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:24:18,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (1/1) ... [2022-07-21 05:24:18,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:24:18,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:24:18,961 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) [2022-07-21 05:24:18,987 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 [2022-07-21 05:24:19,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:24:19,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:24:19,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:24:19,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:24:19,141 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:24:19,144 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:24:19,623 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:24:19,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:24:19,635 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 05:24:19,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:24:19 BoogieIcfgContainer [2022-07-21 05:24:19,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:24:19,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:24:19,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:24:19,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:24:19,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:24:18" (1/3) ... [2022-07-21 05:24:19,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6331ac0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:24:19, skipping insertion in model container [2022-07-21 05:24:19,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:18" (2/3) ... [2022-07-21 05:24:19,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6331ac0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:24:19, skipping insertion in model container [2022-07-21 05:24:19,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:24:19" (3/3) ... [2022-07-21 05:24:19,646 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2022-07-21 05:24:19,660 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:24:19,660 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 05:24:19,748 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:24:19,755 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@4d5d8939, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1c01391b [2022-07-21 05:24:19,756 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 05:24:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 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) [2022-07-21 05:24:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 05:24:19,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:19,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:19,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:19,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:19,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2019613380, now seen corresponding path program 1 times [2022-07-21 05:24:19,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:19,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497006535] [2022-07-21 05:24:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:19,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:19,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497006535] [2022-07-21 05:24:19,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497006535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:19,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:19,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 05:24:19,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163124302] [2022-07-21 05:24:19,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:19,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 05:24:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 05:24:20,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 05:24:20,005 INFO L87 Difference]: Start difference. First operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 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 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-07-21 05:24:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:20,042 INFO L93 Difference]: Finished difference Result 171 states and 278 transitions. [2022-07-21 05:24:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 05:24:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 29 [2022-07-21 05:24:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:20,053 INFO L225 Difference]: With dead ends: 171 [2022-07-21 05:24:20,053 INFO L226 Difference]: Without dead ends: 96 [2022-07-21 05:24:20,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 05:24:20,064 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:20,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-21 05:24:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-07-21 05:24:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6736842105263159) internal successors, (159), 95 states have internal predecessors, (159), 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) [2022-07-21 05:24:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 159 transitions. [2022-07-21 05:24:20,113 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 159 transitions. Word has length 29 [2022-07-21 05:24:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:20,113 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 159 transitions. [2022-07-21 05:24:20,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-07-21 05:24:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 159 transitions. [2022-07-21 05:24:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 05:24:20,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:20,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:20,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:24:20,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2141340410, now seen corresponding path program 1 times [2022-07-21 05:24:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:20,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917845983] [2022-07-21 05:24:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:20,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:20,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:20,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917845983] [2022-07-21 05:24:20,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917845983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:20,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:20,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:24:20,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543853469] [2022-07-21 05:24:20,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:20,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:24:20,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:24:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:24:20,242 INFO L87 Difference]: Start difference. First operand 96 states and 159 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-07-21 05:24:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:20,356 INFO L93 Difference]: Finished difference Result 232 states and 373 transitions. [2022-07-21 05:24:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:24:20,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 29 [2022-07-21 05:24:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:20,358 INFO L225 Difference]: With dead ends: 232 [2022-07-21 05:24:20,358 INFO L226 Difference]: Without dead ends: 162 [2022-07-21 05:24:20,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:24:20,360 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 107 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:20,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 591 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:24:20,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-21 05:24:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2022-07-21 05:24:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 95 states have internal predecessors, (135), 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) [2022-07-21 05:24:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2022-07-21 05:24:20,370 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 29 [2022-07-21 05:24:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:20,370 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2022-07-21 05:24:20,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-07-21 05:24:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2022-07-21 05:24:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 05:24:20,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:20,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:20,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 05:24:20,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1164590349, now seen corresponding path program 1 times [2022-07-21 05:24:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:20,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044155755] [2022-07-21 05:24:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:20,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:20,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:20,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044155755] [2022-07-21 05:24:20,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044155755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:20,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:20,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:20,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919789469] [2022-07-21 05:24:20,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:20,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:20,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:20,536 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-07-21 05:24:20,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:20,555 INFO L93 Difference]: Finished difference Result 216 states and 325 transitions. [2022-07-21 05:24:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:20,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2022-07-21 05:24:20,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:20,557 INFO L225 Difference]: With dead ends: 216 [2022-07-21 05:24:20,557 INFO L226 Difference]: Without dead ends: 150 [2022-07-21 05:24:20,558 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 [2022-07-21 05:24:20,559 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 93 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:20,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-21 05:24:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2022-07-21 05:24:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.4829931972789117) internal successors, (218), 147 states have internal predecessors, (218), 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) [2022-07-21 05:24:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 218 transitions. [2022-07-21 05:24:20,572 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 218 transitions. Word has length 52 [2022-07-21 05:24:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:20,572 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 218 transitions. [2022-07-21 05:24:20,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-07-21 05:24:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 218 transitions. [2022-07-21 05:24:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 05:24:20,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:20,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:20,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 05:24:20,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 502679627, now seen corresponding path program 1 times [2022-07-21 05:24:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:20,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374966013] [2022-07-21 05:24:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:20,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:20,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:20,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374966013] [2022-07-21 05:24:20,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374966013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:20,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:20,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:20,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974622633] [2022-07-21 05:24:20,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:20,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:20,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:20,719 INFO L87 Difference]: Start difference. First operand 148 states and 218 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-07-21 05:24:20,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:20,741 INFO L93 Difference]: Finished difference Result 360 states and 554 transitions. [2022-07-21 05:24:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:20,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2022-07-21 05:24:20,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:20,745 INFO L225 Difference]: With dead ends: 360 [2022-07-21 05:24:20,745 INFO L226 Difference]: Without dead ends: 242 [2022-07-21 05:24:20,746 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 [2022-07-21 05:24:20,747 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 88 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:20,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 303 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-21 05:24:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2022-07-21 05:24:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.5188284518828452) internal successors, (363), 239 states have internal predecessors, (363), 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) [2022-07-21 05:24:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 363 transitions. [2022-07-21 05:24:20,784 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 363 transitions. Word has length 53 [2022-07-21 05:24:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:20,785 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 363 transitions. [2022-07-21 05:24:20,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-07-21 05:24:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 363 transitions. [2022-07-21 05:24:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 05:24:20,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:20,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:20,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 05:24:20,787 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1405286019, now seen corresponding path program 1 times [2022-07-21 05:24:20,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:20,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415543588] [2022-07-21 05:24:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:20,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:20,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:20,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415543588] [2022-07-21 05:24:20,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415543588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:20,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:20,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:20,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546971364] [2022-07-21 05:24:20,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:20,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:20,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:20,879 INFO L87 Difference]: Start difference. First operand 240 states and 363 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-07-21 05:24:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:20,907 INFO L93 Difference]: Finished difference Result 612 states and 949 transitions. [2022-07-21 05:24:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2022-07-21 05:24:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:20,911 INFO L225 Difference]: With dead ends: 612 [2022-07-21 05:24:20,911 INFO L226 Difference]: Without dead ends: 402 [2022-07-21 05:24:20,912 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 [2022-07-21 05:24:20,913 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 83 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:20,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 294 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-21 05:24:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2022-07-21 05:24:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.531328320802005) internal successors, (611), 399 states have internal predecessors, (611), 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) [2022-07-21 05:24:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 611 transitions. [2022-07-21 05:24:20,944 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 611 transitions. Word has length 54 [2022-07-21 05:24:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:20,944 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 611 transitions. [2022-07-21 05:24:20,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-07-21 05:24:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 611 transitions. [2022-07-21 05:24:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 05:24:20,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:20,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:20,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 05:24:20,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:20,947 INFO L85 PathProgramCache]: Analyzing trace with hash 417554395, now seen corresponding path program 1 times [2022-07-21 05:24:20,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:20,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810336579] [2022-07-21 05:24:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:20,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:21,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:21,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810336579] [2022-07-21 05:24:21,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810336579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:21,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:21,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:21,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611952701] [2022-07-21 05:24:21,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:21,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:21,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:21,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:21,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:21,022 INFO L87 Difference]: Start difference. First operand 400 states and 611 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-07-21 05:24:21,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:21,053 INFO L93 Difference]: Finished difference Result 1044 states and 1613 transitions. [2022-07-21 05:24:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:21,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 55 [2022-07-21 05:24:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:21,057 INFO L225 Difference]: With dead ends: 1044 [2022-07-21 05:24:21,057 INFO L226 Difference]: Without dead ends: 674 [2022-07-21 05:24:21,059 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 [2022-07-21 05:24:21,060 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 78 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:21,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 285 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-07-21 05:24:21,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2022-07-21 05:24:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.5245901639344261) internal successors, (1023), 671 states have internal predecessors, (1023), 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) [2022-07-21 05:24:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1023 transitions. [2022-07-21 05:24:21,098 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1023 transitions. Word has length 55 [2022-07-21 05:24:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:21,098 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 1023 transitions. [2022-07-21 05:24:21,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-07-21 05:24:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1023 transitions. [2022-07-21 05:24:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 05:24:21,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:21,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:21,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 05:24:21,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:21,101 INFO L85 PathProgramCache]: Analyzing trace with hash -368690669, now seen corresponding path program 1 times [2022-07-21 05:24:21,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:21,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919930278] [2022-07-21 05:24:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:21,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:21,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:21,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919930278] [2022-07-21 05:24:21,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919930278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:21,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:21,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:24:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477017527] [2022-07-21 05:24:21,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:21,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:24:21,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:21,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:24:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:24:21,196 INFO L87 Difference]: Start difference. First operand 672 states and 1023 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2022-07-21 05:24:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:21,396 INFO L93 Difference]: Finished difference Result 3882 states and 5988 transitions. [2022-07-21 05:24:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:24:21,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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 56 [2022-07-21 05:24:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:21,415 INFO L225 Difference]: With dead ends: 3882 [2022-07-21 05:24:21,415 INFO L226 Difference]: Without dead ends: 3240 [2022-07-21 05:24:21,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:24:21,417 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 839 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:21,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 1028 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2022-07-21 05:24:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 1312. [2022-07-21 05:24:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 1.5125858123569793) internal successors, (1983), 1311 states have internal predecessors, (1983), 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) [2022-07-21 05:24:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1983 transitions. [2022-07-21 05:24:21,511 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1983 transitions. Word has length 56 [2022-07-21 05:24:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:21,511 INFO L495 AbstractCegarLoop]: Abstraction has 1312 states and 1983 transitions. [2022-07-21 05:24:21,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2022-07-21 05:24:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1983 transitions. [2022-07-21 05:24:21,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 05:24:21,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:21,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:21,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 05:24:21,522 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1072167829, now seen corresponding path program 1 times [2022-07-21 05:24:21,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:21,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955607008] [2022-07-21 05:24:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:21,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:21,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:21,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955607008] [2022-07-21 05:24:21,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955607008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:21,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:21,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:24:21,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14928436] [2022-07-21 05:24:21,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:21,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:24:21,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:24:21,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:24:21,671 INFO L87 Difference]: Start difference. First operand 1312 states and 1983 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2022-07-21 05:24:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:22,052 INFO L93 Difference]: Finished difference Result 5864 states and 8803 transitions. [2022-07-21 05:24:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:24:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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 57 [2022-07-21 05:24:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:22,070 INFO L225 Difference]: With dead ends: 5864 [2022-07-21 05:24:22,070 INFO L226 Difference]: Without dead ends: 4582 [2022-07-21 05:24:22,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:24:22,075 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 453 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:22,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 556 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:24:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2022-07-21 05:24:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4576. [2022-07-21 05:24:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 1.4896174863387979) internal successors, (6815), 4575 states have internal predecessors, (6815), 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) [2022-07-21 05:24:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6815 transitions. [2022-07-21 05:24:22,382 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6815 transitions. Word has length 57 [2022-07-21 05:24:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:22,383 INFO L495 AbstractCegarLoop]: Abstraction has 4576 states and 6815 transitions. [2022-07-21 05:24:22,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2022-07-21 05:24:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6815 transitions. [2022-07-21 05:24:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 05:24:22,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:22,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:22,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 05:24:22,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:22,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1541080392, now seen corresponding path program 1 times [2022-07-21 05:24:22,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:22,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309171954] [2022-07-21 05:24:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:22,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:22,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:22,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309171954] [2022-07-21 05:24:22,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309171954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:22,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:22,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:24:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252197975] [2022-07-21 05:24:22,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:22,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:24:22,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:24:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:24:22,447 INFO L87 Difference]: Start difference. First operand 4576 states and 6815 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-07-21 05:24:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:23,037 INFO L93 Difference]: Finished difference Result 9634 states and 14112 transitions. [2022-07-21 05:24:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 05:24:23,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 58 [2022-07-21 05:24:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:23,070 INFO L225 Difference]: With dead ends: 9634 [2022-07-21 05:24:23,070 INFO L226 Difference]: Without dead ends: 9632 [2022-07-21 05:24:23,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:24:23,079 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 294 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:23,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 588 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2022-07-21 05:24:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 4960. [2022-07-21 05:24:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 1.451703972575116) internal successors, (7199), 4959 states have internal predecessors, (7199), 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) [2022-07-21 05:24:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 7199 transitions. [2022-07-21 05:24:23,472 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 7199 transitions. Word has length 58 [2022-07-21 05:24:23,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:23,473 INFO L495 AbstractCegarLoop]: Abstraction has 4960 states and 7199 transitions. [2022-07-21 05:24:23,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-07-21 05:24:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 7199 transitions. [2022-07-21 05:24:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:24:23,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:23,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:23,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 05:24:23,474 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:23,475 INFO L85 PathProgramCache]: Analyzing trace with hash 581430488, now seen corresponding path program 1 times [2022-07-21 05:24:23,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:23,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727362319] [2022-07-21 05:24:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:23,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:23,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727362319] [2022-07-21 05:24:23,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727362319] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:23,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:23,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:23,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859901061] [2022-07-21 05:24:23,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:23,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:23,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:23,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:23,511 INFO L87 Difference]: Start difference. First operand 4960 states and 7199 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-07-21 05:24:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:24,038 INFO L93 Difference]: Finished difference Result 11966 states and 17395 transitions. [2022-07-21 05:24:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:24,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2022-07-21 05:24:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:24,067 INFO L225 Difference]: With dead ends: 11966 [2022-07-21 05:24:24,067 INFO L226 Difference]: Without dead ends: 7036 [2022-07-21 05:24:24,074 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 [2022-07-21 05:24:24,075 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 69 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:24,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7036 states. [2022-07-21 05:24:24,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7036 to 7034. [2022-07-21 05:24:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7033 states have (on average 1.4458979098535476) internal successors, (10169), 7033 states have internal predecessors, (10169), 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) [2022-07-21 05:24:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10169 transitions. [2022-07-21 05:24:24,586 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10169 transitions. Word has length 59 [2022-07-21 05:24:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:24,586 INFO L495 AbstractCegarLoop]: Abstraction has 7034 states and 10169 transitions. [2022-07-21 05:24:24,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2022-07-21 05:24:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10169 transitions. [2022-07-21 05:24:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 05:24:24,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:24,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:24,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 05:24:24,592 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:24,593 INFO L85 PathProgramCache]: Analyzing trace with hash 418253800, now seen corresponding path program 1 times [2022-07-21 05:24:24,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:24,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617611690] [2022-07-21 05:24:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:24,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:24:24,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:24,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617611690] [2022-07-21 05:24:24,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617611690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:24:24,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411758214] [2022-07-21 05:24:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:24,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:24:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:24:24,703 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) [2022-07-21 05:24:24,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:24:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:24,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 05:24:24,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:24:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:24:24,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:24:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:24:25,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411758214] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:24:25,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:24:25,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-07-21 05:24:25,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543302959] [2022-07-21 05:24:25,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:24:25,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 05:24:25,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:25,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 05:24:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-21 05:24:25,294 INFO L87 Difference]: Start difference. First operand 7034 states and 10169 transitions. Second operand has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 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) [2022-07-21 05:24:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:26,851 INFO L93 Difference]: Finished difference Result 26408 states and 38489 transitions. [2022-07-21 05:24:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 05:24:26,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 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 [2022-07-21 05:24:26,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:26,894 INFO L225 Difference]: With dead ends: 26408 [2022-07-21 05:24:26,895 INFO L226 Difference]: Without dead ends: 21478 [2022-07-21 05:24:26,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-07-21 05:24:26,907 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 935 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:26,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 1187 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:24:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21478 states. [2022-07-21 05:24:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21478 to 20634. [2022-07-21 05:24:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20634 states, 20633 states have (on average 1.4389085445645327) internal successors, (29689), 20633 states have internal predecessors, (29689), 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) [2022-07-21 05:24:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20634 states to 20634 states and 29689 transitions. [2022-07-21 05:24:28,049 INFO L78 Accepts]: Start accepts. Automaton has 20634 states and 29689 transitions. Word has length 82 [2022-07-21 05:24:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:28,050 INFO L495 AbstractCegarLoop]: Abstraction has 20634 states and 29689 transitions. [2022-07-21 05:24:28,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.9) internal successors, (229), 10 states have internal predecessors, (229), 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) [2022-07-21 05:24:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 20634 states and 29689 transitions. [2022-07-21 05:24:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 05:24:28,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:28,055 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:28,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 05:24:28,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-21 05:24:28,281 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:28,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:28,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1896856622, now seen corresponding path program 1 times [2022-07-21 05:24:28,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:28,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141690887] [2022-07-21 05:24:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:28,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:24:28,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:28,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141690887] [2022-07-21 05:24:28,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141690887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:28,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:28,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:24:28,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282630500] [2022-07-21 05:24:28,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:28,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:24:28,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:24:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:24:28,359 INFO L87 Difference]: Start difference. First operand 20634 states and 29689 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 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) [2022-07-21 05:24:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:30,217 INFO L93 Difference]: Finished difference Result 44764 states and 64742 transitions. [2022-07-21 05:24:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:24:30,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 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 83 [2022-07-21 05:24:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:30,301 INFO L225 Difference]: With dead ends: 44764 [2022-07-21 05:24:30,301 INFO L226 Difference]: Without dead ends: 36086 [2022-07-21 05:24:30,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:24:30,327 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 660 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:30,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 891 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36086 states. [2022-07-21 05:24:31,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36086 to 27402. [2022-07-21 05:24:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27402 states, 27401 states have (on average 1.434436699390533) internal successors, (39305), 27401 states have internal predecessors, (39305), 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) [2022-07-21 05:24:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27402 states to 27402 states and 39305 transitions. [2022-07-21 05:24:31,933 INFO L78 Accepts]: Start accepts. Automaton has 27402 states and 39305 transitions. Word has length 83 [2022-07-21 05:24:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:31,933 INFO L495 AbstractCegarLoop]: Abstraction has 27402 states and 39305 transitions. [2022-07-21 05:24:31,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 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) [2022-07-21 05:24:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27402 states and 39305 transitions. [2022-07-21 05:24:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 05:24:31,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:31,938 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:31,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 05:24:31,939 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1918927774, now seen corresponding path program 1 times [2022-07-21 05:24:31,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:31,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811632354] [2022-07-21 05:24:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:31,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:31,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:31,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811632354] [2022-07-21 05:24:31,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811632354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:31,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:31,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:31,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450002243] [2022-07-21 05:24:31,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:31,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:31,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:31,980 INFO L87 Difference]: Start difference. First operand 27402 states and 39305 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2022-07-21 05:24:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:33,934 INFO L93 Difference]: Finished difference Result 67249 states and 96337 transitions. [2022-07-21 05:24:33,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:33,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2022-07-21 05:24:33,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:34,008 INFO L225 Difference]: With dead ends: 67249 [2022-07-21 05:24:34,008 INFO L226 Difference]: Without dead ends: 44207 [2022-07-21 05:24:34,047 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 [2022-07-21 05:24:34,048 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 69 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:34,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 272 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:34,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44207 states. [2022-07-21 05:24:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44207 to 42477. [2022-07-21 05:24:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42477 states, 42476 states have (on average 1.4172473867595818) internal successors, (60199), 42476 states have internal predecessors, (60199), 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) [2022-07-21 05:24:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42477 states to 42477 states and 60199 transitions. [2022-07-21 05:24:36,458 INFO L78 Accepts]: Start accepts. Automaton has 42477 states and 60199 transitions. Word has length 83 [2022-07-21 05:24:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:36,458 INFO L495 AbstractCegarLoop]: Abstraction has 42477 states and 60199 transitions. [2022-07-21 05:24:36,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2022-07-21 05:24:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 42477 states and 60199 transitions. [2022-07-21 05:24:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 05:24:36,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:36,466 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:36,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 05:24:36,466 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:36,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1322927490, now seen corresponding path program 1 times [2022-07-21 05:24:36,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:36,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490494897] [2022-07-21 05:24:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:36,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:36,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:36,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490494897] [2022-07-21 05:24:36,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490494897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:36,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:36,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:36,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738078219] [2022-07-21 05:24:36,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:36,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:36,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:36,533 INFO L87 Difference]: Start difference. First operand 42477 states and 60199 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2022-07-21 05:24:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:38,684 INFO L93 Difference]: Finished difference Result 66562 states and 93995 transitions. [2022-07-21 05:24:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:38,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2022-07-21 05:24:38,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:38,775 INFO L225 Difference]: With dead ends: 66562 [2022-07-21 05:24:38,776 INFO L226 Difference]: Without dead ends: 43824 [2022-07-21 05:24:38,804 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 [2022-07-21 05:24:38,804 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 71 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:38,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 298 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43824 states. [2022-07-21 05:24:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43824 to 42568. [2022-07-21 05:24:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42568 states, 42567 states have (on average 1.3918293513754787) internal successors, (59246), 42567 states have internal predecessors, (59246), 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) [2022-07-21 05:24:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42568 states to 42568 states and 59246 transitions. [2022-07-21 05:24:41,133 INFO L78 Accepts]: Start accepts. Automaton has 42568 states and 59246 transitions. Word has length 83 [2022-07-21 05:24:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:41,133 INFO L495 AbstractCegarLoop]: Abstraction has 42568 states and 59246 transitions. [2022-07-21 05:24:41,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2022-07-21 05:24:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 42568 states and 59246 transitions. [2022-07-21 05:24:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 05:24:41,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:41,291 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:41,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 05:24:41,291 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:41,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:41,292 INFO L85 PathProgramCache]: Analyzing trace with hash 895581426, now seen corresponding path program 1 times [2022-07-21 05:24:41,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:41,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685313853] [2022-07-21 05:24:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:41,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:41,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:41,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685313853] [2022-07-21 05:24:41,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685313853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:41,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:41,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:41,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979790583] [2022-07-21 05:24:41,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:41,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:41,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:41,340 INFO L87 Difference]: Start difference. First operand 42568 states and 59246 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2022-07-21 05:24:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:44,288 INFO L93 Difference]: Finished difference Result 91626 states and 127103 transitions. [2022-07-21 05:24:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:44,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2022-07-21 05:24:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:44,400 INFO L225 Difference]: With dead ends: 91626 [2022-07-21 05:24:44,400 INFO L226 Difference]: Without dead ends: 58248 [2022-07-21 05:24:44,436 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 [2022-07-21 05:24:44,437 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 70 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:44,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 285 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58248 states. [2022-07-21 05:24:47,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58248 to 57217. [2022-07-21 05:24:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57217 states, 57216 states have (on average 1.3692149049217002) internal successors, (78341), 57216 states have internal predecessors, (78341), 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) [2022-07-21 05:24:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57217 states to 57217 states and 78341 transitions. [2022-07-21 05:24:47,568 INFO L78 Accepts]: Start accepts. Automaton has 57217 states and 78341 transitions. Word has length 83 [2022-07-21 05:24:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:47,568 INFO L495 AbstractCegarLoop]: Abstraction has 57217 states and 78341 transitions. [2022-07-21 05:24:47,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2022-07-21 05:24:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 57217 states and 78341 transitions. [2022-07-21 05:24:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 05:24:47,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:47,576 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:47,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 05:24:47,577 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash -679069464, now seen corresponding path program 1 times [2022-07-21 05:24:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:47,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235067827] [2022-07-21 05:24:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:47,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 05:24:47,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235067827] [2022-07-21 05:24:47,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235067827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:47,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:47,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:24:47,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058457048] [2022-07-21 05:24:47,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:47,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:24:47,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:24:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:24:47,729 INFO L87 Difference]: Start difference. First operand 57217 states and 78341 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2022-07-21 05:24:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:52,102 INFO L93 Difference]: Finished difference Result 111218 states and 153817 transitions. [2022-07-21 05:24:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:24:52,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 83 [2022-07-21 05:24:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:52,255 INFO L225 Difference]: With dead ends: 111218 [2022-07-21 05:24:52,255 INFO L226 Difference]: Without dead ends: 100464 [2022-07-21 05:24:52,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:24:52,289 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 668 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:52,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 822 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100464 states. [2022-07-21 05:24:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100464 to 67297. [2022-07-21 05:24:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67297 states, 67296 states have (on average 1.3704975035663338) internal successors, (92229), 67296 states have internal predecessors, (92229), 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) [2022-07-21 05:24:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67297 states to 67297 states and 92229 transitions. [2022-07-21 05:24:56,097 INFO L78 Accepts]: Start accepts. Automaton has 67297 states and 92229 transitions. Word has length 83 [2022-07-21 05:24:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:56,097 INFO L495 AbstractCegarLoop]: Abstraction has 67297 states and 92229 transitions. [2022-07-21 05:24:56,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2022-07-21 05:24:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 67297 states and 92229 transitions. [2022-07-21 05:24:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 05:24:56,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:56,106 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:56,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 05:24:56,106 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:56,107 INFO L85 PathProgramCache]: Analyzing trace with hash 576343346, now seen corresponding path program 1 times [2022-07-21 05:24:56,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:56,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576031881] [2022-07-21 05:24:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:56,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:24:56,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:56,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576031881] [2022-07-21 05:24:56,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576031881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:56,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:56,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:24:56,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924384047] [2022-07-21 05:24:56,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:56,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:24:56,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:24:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:24:56,157 INFO L87 Difference]: Start difference. First operand 67297 states and 92229 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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)