./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.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 2b4e579e156345915e1fde26fcd53bce80a36e2067cd5c9341971cdf8691491e --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 06:56:13,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 06:56:13,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 06:56:13,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 06:56:13,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 06:56:13,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 06:56:13,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 06:56:13,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 06:56:13,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 06:56:13,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 06:56:13,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 06:56:13,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 06:56:13,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 06:56:13,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 06:56:13,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 06:56:13,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 06:56:13,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 06:56:13,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 06:56:13,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 06:56:13,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 06:56:13,114 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 06:56:13,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 06:56:13,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 06:56:13,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 06:56:13,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 06:56:13,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 06:56:13,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 06:56:13,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 06:56:13,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 06:56:13,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 06:56:13,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 06:56:13,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 06:56:13,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 06:56:13,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 06:56:13,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 06:56:13,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 06:56:13,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 06:56:13,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 06:56:13,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 06:56:13,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 06:56:13,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 06:56:13,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 06:56:13,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 06:56:13,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 06:56:13,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 06:56:13,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 06:56:13,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 06:56:13,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 06:56:13,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 06:56:13,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 06:56:13,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 06:56:13,180 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 06:56:13,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 06:56:13,181 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 06:56:13,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 06:56:13,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 06:56:13,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 06:56:13,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 06:56:13,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 06:56:13,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 06:56:13,182 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 06:56:13,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 06:56:13,184 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 06:56:13,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 06:56:13,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 06:56:13,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 06:56:13,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 06:56:13,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:56:13,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 06:56:13,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 06:56:13,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 06:56:13,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 06:56:13,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 06:56:13,186 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 06:56:13,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 06:56:13,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 06:56:13,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b4e579e156345915e1fde26fcd53bce80a36e2067cd5c9341971cdf8691491e [2022-07-12 06:56:13,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 06:56:13,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 06:56:13,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 06:56:13,391 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 06:56:13,391 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 06:56:13,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-07-12 06:56:13,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bb17dbb/707e6285d2ea4a2589b2a5ce92177e97/FLAG3d5ba6b8a [2022-07-12 06:56:13,849 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 06:56:13,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-07-12 06:56:13,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bb17dbb/707e6285d2ea4a2589b2a5ce92177e97/FLAG3d5ba6b8a [2022-07-12 06:56:14,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7bb17dbb/707e6285d2ea4a2589b2a5ce92177e97 [2022-07-12 06:56:14,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 06:56:14,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 06:56:14,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 06:56:14,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 06:56:14,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 06:56:14,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1b57ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14, skipping insertion in model container [2022-07-12 06:56:14,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 06:56:14,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 06:56:14,541 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-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12498,12511] [2022-07-12 06:56:14,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:56:14,609 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 06:56:14,665 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-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12498,12511] [2022-07-12 06:56:14,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:56:14,715 INFO L208 MainTranslator]: Completed translation [2022-07-12 06:56:14,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14 WrapperNode [2022-07-12 06:56:14,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 06:56:14,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 06:56:14,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 06:56:14,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 06:56:14,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,790 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1256 [2022-07-12 06:56:14,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 06:56:14,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 06:56:14,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 06:56:14,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 06:56:14,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 06:56:14,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 06:56:14,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 06:56:14,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 06:56:14,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (1/1) ... [2022-07-12 06:56:14,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:56:14,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:56:14,874 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) [2022-07-12 06:56:14,894 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 [2022-07-12 06:56:14,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 06:56:14,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 06:56:14,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 06:56:14,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 06:56:15,036 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 06:56:15,038 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 06:56:15,784 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 06:56:15,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 06:56:15,791 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 06:56:15,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:56:15 BoogieIcfgContainer [2022-07-12 06:56:15,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 06:56:15,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 06:56:15,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 06:56:15,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 06:56:15,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:56:14" (1/3) ... [2022-07-12 06:56:15,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e76bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:56:15, skipping insertion in model container [2022-07-12 06:56:15,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:56:14" (2/3) ... [2022-07-12 06:56:15,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e76bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:56:15, skipping insertion in model container [2022-07-12 06:56:15,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:56:15" (3/3) ... [2022-07-12 06:56:15,801 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-07-12 06:56:15,831 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 06:56:15,832 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 06:56:15,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 06:56:15,891 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@5a12be82, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46a65c5 [2022-07-12 06:56:15,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 06:56:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 305 states have (on average 1.79672131147541) internal successors, (548), 306 states have internal predecessors, (548), 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) [2022-07-12 06:56:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-12 06:56:15,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:15,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:15,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:15,916 INFO L85 PathProgramCache]: Analyzing trace with hash 103029560, now seen corresponding path program 1 times [2022-07-12 06:56:15,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:15,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760288373] [2022-07-12 06:56:15,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:15,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:16,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:16,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760288373] [2022-07-12 06:56:16,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760288373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:16,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:16,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 06:56:16,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975543139] [2022-07-12 06:56:16,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:16,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:56:16,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:56:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 06:56:16,397 INFO L87 Difference]: Start difference. First operand has 307 states, 305 states have (on average 1.79672131147541) internal successors, (548), 306 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-07-12 06:56:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:16,510 INFO L93 Difference]: Finished difference Result 556 states and 967 transitions. [2022-07-12 06:56:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:56:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 99 [2022-07-12 06:56:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:16,524 INFO L225 Difference]: With dead ends: 556 [2022-07-12 06:56:16,524 INFO L226 Difference]: Without dead ends: 420 [2022-07-12 06:56:16,527 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 [2022-07-12 06:56:16,545 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 210 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:56:16,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1038 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-07-12 06:56:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 418. [2022-07-12 06:56:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.683453237410072) internal successors, (702), 417 states have internal predecessors, (702), 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) [2022-07-12 06:56:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 702 transitions. [2022-07-12 06:56:16,660 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 702 transitions. Word has length 99 [2022-07-12 06:56:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:16,663 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 702 transitions. [2022-07-12 06:56:16,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-07-12 06:56:16,664 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 702 transitions. [2022-07-12 06:56:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-12 06:56:16,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:16,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:16,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 06:56:16,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:16,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1521112466, now seen corresponding path program 1 times [2022-07-12 06:56:16,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:16,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402466302] [2022-07-12 06:56:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:16,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:16,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:16,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402466302] [2022-07-12 06:56:16,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402466302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:16,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:16,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 06:56:16,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520028660] [2022-07-12 06:56:16,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:16,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:56:16,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:16,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:56:16,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 06:56:16,824 INFO L87 Difference]: Start difference. First operand 418 states and 702 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-07-12 06:56:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:16,861 INFO L93 Difference]: Finished difference Result 882 states and 1478 transitions. [2022-07-12 06:56:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:56:16,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 102 [2022-07-12 06:56:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:16,867 INFO L225 Difference]: With dead ends: 882 [2022-07-12 06:56:16,867 INFO L226 Difference]: Without dead ends: 641 [2022-07-12 06:56:16,869 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 [2022-07-12 06:56:16,870 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 189 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:56:16,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 997 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-07-12 06:56:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 639. [2022-07-12 06:56:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 1.677115987460815) internal successors, (1070), 638 states have internal predecessors, (1070), 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) [2022-07-12 06:56:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1070 transitions. [2022-07-12 06:56:16,914 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1070 transitions. Word has length 102 [2022-07-12 06:56:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:16,915 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 1070 transitions. [2022-07-12 06:56:16,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-07-12 06:56:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1070 transitions. [2022-07-12 06:56:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-12 06:56:16,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:16,920 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:16,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 06:56:16,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2035930850, now seen corresponding path program 1 times [2022-07-12 06:56:16,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:16,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022058947] [2022-07-12 06:56:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:16,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:16,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:17,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022058947] [2022-07-12 06:56:17,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022058947] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:17,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:17,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 06:56:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599974514] [2022-07-12 06:56:17,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:17,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:56:17,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:17,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:56:17,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 06:56:17,002 INFO L87 Difference]: Start difference. First operand 639 states and 1070 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2022-07-12 06:56:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:17,044 INFO L93 Difference]: Finished difference Result 1527 states and 2548 transitions. [2022-07-12 06:56:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:56:17,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 105 [2022-07-12 06:56:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:17,048 INFO L225 Difference]: With dead ends: 1527 [2022-07-12 06:56:17,048 INFO L226 Difference]: Without dead ends: 1065 [2022-07-12 06:56:17,050 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 [2022-07-12 06:56:17,051 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 183 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:56:17,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 1077 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-07-12 06:56:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1063. [2022-07-12 06:56:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 1.6666666666666667) internal successors, (1770), 1062 states have internal predecessors, (1770), 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) [2022-07-12 06:56:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1770 transitions. [2022-07-12 06:56:17,096 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1770 transitions. Word has length 105 [2022-07-12 06:56:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:17,097 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1770 transitions. [2022-07-12 06:56:17,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2022-07-12 06:56:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1770 transitions. [2022-07-12 06:56:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-12 06:56:17,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:17,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:17,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 06:56:17,101 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:17,102 INFO L85 PathProgramCache]: Analyzing trace with hash 467943166, now seen corresponding path program 1 times [2022-07-12 06:56:17,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:17,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100423041] [2022-07-12 06:56:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:17,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:17,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:17,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100423041] [2022-07-12 06:56:17,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100423041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:17,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:17,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 06:56:17,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200106143] [2022-07-12 06:56:17,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:17,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:56:17,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:17,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:56:17,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 06:56:17,213 INFO L87 Difference]: Start difference. First operand 1063 states and 1770 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2022-07-12 06:56:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:17,269 INFO L93 Difference]: Finished difference Result 1969 states and 3284 transitions. [2022-07-12 06:56:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:56:17,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 108 [2022-07-12 06:56:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:17,299 INFO L225 Difference]: With dead ends: 1969 [2022-07-12 06:56:17,299 INFO L226 Difference]: Without dead ends: 1507 [2022-07-12 06:56:17,300 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 [2022-07-12 06:56:17,308 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 184 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1069 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 [2022-07-12 06:56:17,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1069 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:17,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-07-12 06:56:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1505. [2022-07-12 06:56:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.663563829787234) internal successors, (2502), 1504 states have internal predecessors, (2502), 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) [2022-07-12 06:56:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2502 transitions. [2022-07-12 06:56:17,363 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2502 transitions. Word has length 108 [2022-07-12 06:56:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:17,364 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2502 transitions. [2022-07-12 06:56:17,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2022-07-12 06:56:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2502 transitions. [2022-07-12 06:56:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-12 06:56:17,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:17,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:17,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 06:56:17,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:17,367 INFO L85 PathProgramCache]: Analyzing trace with hash -315451476, now seen corresponding path program 1 times [2022-07-12 06:56:17,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:17,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647670698] [2022-07-12 06:56:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:17,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:17,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:17,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647670698] [2022-07-12 06:56:17,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647670698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:17,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:17,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 06:56:17,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507841158] [2022-07-12 06:56:17,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:17,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:56:17,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:17,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:56:17,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 06:56:17,455 INFO L87 Difference]: Start difference. First operand 1505 states and 2502 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2022-07-12 06:56:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:17,555 INFO L93 Difference]: Finished difference Result 3881 states and 6428 transitions. [2022-07-12 06:56:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:56:17,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 108 [2022-07-12 06:56:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:17,565 INFO L225 Difference]: With dead ends: 3881 [2022-07-12 06:56:17,566 INFO L226 Difference]: Without dead ends: 2639 [2022-07-12 06:56:17,568 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 [2022-07-12 06:56:17,572 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 177 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:56:17,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1051 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-07-12 06:56:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2637. [2022-07-12 06:56:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2636 states have (on average 1.650227617602428) internal successors, (4350), 2636 states have internal predecessors, (4350), 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) [2022-07-12 06:56:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 4350 transitions. [2022-07-12 06:56:17,661 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 4350 transitions. Word has length 108 [2022-07-12 06:56:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:17,661 INFO L495 AbstractCegarLoop]: Abstraction has 2637 states and 4350 transitions. [2022-07-12 06:56:17,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2022-07-12 06:56:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 4350 transitions. [2022-07-12 06:56:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-12 06:56:17,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:17,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:17,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 06:56:17,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash 933596114, now seen corresponding path program 1 times [2022-07-12 06:56:17,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:17,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359807180] [2022-07-12 06:56:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:17,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:17,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:17,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359807180] [2022-07-12 06:56:17,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359807180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:17,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:17,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 06:56:17,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711173552] [2022-07-12 06:56:17,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:17,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:56:17,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:17,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:56:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 06:56:17,740 INFO L87 Difference]: Start difference. First operand 2637 states and 4350 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 06:56:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:17,866 INFO L93 Difference]: Finished difference Result 4881 states and 8064 transitions. [2022-07-12 06:56:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:56:17,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-12 06:56:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:17,879 INFO L225 Difference]: With dead ends: 4881 [2022-07-12 06:56:17,880 INFO L226 Difference]: Without dead ends: 3639 [2022-07-12 06:56:17,883 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 [2022-07-12 06:56:17,885 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 178 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1042 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 [2022-07-12 06:56:17,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1042 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2022-07-12 06:56:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 3637. [2022-07-12 06:56:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 1.6452145214521452) internal successors, (5982), 3636 states have internal predecessors, (5982), 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) [2022-07-12 06:56:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 5982 transitions. [2022-07-12 06:56:18,051 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 5982 transitions. Word has length 111 [2022-07-12 06:56:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:18,051 INFO L495 AbstractCegarLoop]: Abstraction has 3637 states and 5982 transitions. [2022-07-12 06:56:18,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 06:56:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 5982 transitions. [2022-07-12 06:56:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-12 06:56:18,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:18,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:18,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 06:56:18,053 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1374875396, now seen corresponding path program 1 times [2022-07-12 06:56:18,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:18,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403437107] [2022-07-12 06:56:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:18,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:18,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:18,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403437107] [2022-07-12 06:56:18,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403437107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:18,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:18,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 06:56:18,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430437472] [2022-07-12 06:56:18,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:18,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 06:56:18,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 06:56:18,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:56:18,131 INFO L87 Difference]: Start difference. First operand 3637 states and 5982 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 06:56:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:19,098 INFO L93 Difference]: Finished difference Result 20391 states and 33849 transitions. [2022-07-12 06:56:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 06:56:19,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-12 06:56:19,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:19,188 INFO L225 Difference]: With dead ends: 20391 [2022-07-12 06:56:19,188 INFO L226 Difference]: Without dead ends: 17089 [2022-07-12 06:56:19,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-12 06:56:19,202 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 1812 mSDsluCounter, 3856 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 4435 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:56:19,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1812 Valid, 4435 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:56:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17089 states. [2022-07-12 06:56:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17089 to 6868. [2022-07-12 06:56:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6868 states, 6867 states have (on average 1.6419105868647152) internal successors, (11275), 6867 states have internal predecessors, (11275), 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) [2022-07-12 06:56:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6868 states to 6868 states and 11275 transitions. [2022-07-12 06:56:19,836 INFO L78 Accepts]: Start accepts. Automaton has 6868 states and 11275 transitions. Word has length 111 [2022-07-12 06:56:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:19,837 INFO L495 AbstractCegarLoop]: Abstraction has 6868 states and 11275 transitions. [2022-07-12 06:56:19,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 06:56:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 6868 states and 11275 transitions. [2022-07-12 06:56:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-12 06:56:19,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:19,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:19,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 06:56:19,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:19,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:19,839 INFO L85 PathProgramCache]: Analyzing trace with hash -395597751, now seen corresponding path program 1 times [2022-07-12 06:56:19,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:19,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435235850] [2022-07-12 06:56:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:19,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:19,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:19,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435235850] [2022-07-12 06:56:19,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435235850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:19,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:19,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 06:56:19,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819260896] [2022-07-12 06:56:19,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:19,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 06:56:19,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:19,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 06:56:19,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 06:56:19,896 INFO L87 Difference]: Start difference. First operand 6868 states and 11275 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2022-07-12 06:56:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:20,512 INFO L93 Difference]: Finished difference Result 20225 states and 33450 transitions. [2022-07-12 06:56:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 06:56:20,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 112 [2022-07-12 06:56:20,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:20,584 INFO L225 Difference]: With dead ends: 20225 [2022-07-12 06:56:20,584 INFO L226 Difference]: Without dead ends: 13778 [2022-07-12 06:56:20,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:56:20,598 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 624 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:56:20,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1721 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13778 states. [2022-07-12 06:56:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13778 to 10319. [2022-07-12 06:56:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10319 states, 10318 states have (on average 1.6449893390191899) internal successors, (16973), 10318 states have internal predecessors, (16973), 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) [2022-07-12 06:56:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 16973 transitions. [2022-07-12 06:56:21,280 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 16973 transitions. Word has length 112 [2022-07-12 06:56:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:21,280 INFO L495 AbstractCegarLoop]: Abstraction has 10319 states and 16973 transitions. [2022-07-12 06:56:21,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2022-07-12 06:56:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 16973 transitions. [2022-07-12 06:56:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-12 06:56:21,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:21,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:21,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 06:56:21,283 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash 454247534, now seen corresponding path program 1 times [2022-07-12 06:56:21,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:21,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905227249] [2022-07-12 06:56:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:21,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905227249] [2022-07-12 06:56:21,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905227249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:21,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:21,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 06:56:21,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417057247] [2022-07-12 06:56:21,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:21,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:56:21,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:21,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:56:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 06:56:21,325 INFO L87 Difference]: Start difference. First operand 10319 states and 16973 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-07-12 06:56:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:21,948 INFO L93 Difference]: Finished difference Result 19395 states and 32023 transitions. [2022-07-12 06:56:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:56:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2022-07-12 06:56:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:21,996 INFO L225 Difference]: With dead ends: 19395 [2022-07-12 06:56:21,996 INFO L226 Difference]: Without dead ends: 14003 [2022-07-12 06:56:22,012 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 [2022-07-12 06:56:22,013 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 190 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1113 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 [2022-07-12 06:56:22,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1113 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14003 states. [2022-07-12 06:56:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14003 to 14001. [2022-07-12 06:56:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14001 states, 14000 states have (on average 1.6437857142857142) internal successors, (23013), 14000 states have internal predecessors, (23013), 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) [2022-07-12 06:56:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14001 states to 14001 states and 23013 transitions. [2022-07-12 06:56:22,871 INFO L78 Accepts]: Start accepts. Automaton has 14001 states and 23013 transitions. Word has length 112 [2022-07-12 06:56:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:22,872 INFO L495 AbstractCegarLoop]: Abstraction has 14001 states and 23013 transitions. [2022-07-12 06:56:22,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-07-12 06:56:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 14001 states and 23013 transitions. [2022-07-12 06:56:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-12 06:56:22,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:22,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:22,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 06:56:22,874 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1896648670, now seen corresponding path program 1 times [2022-07-12 06:56:22,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:22,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537325277] [2022-07-12 06:56:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:22,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:22,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537325277] [2022-07-12 06:56:22,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537325277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:22,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:22,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 06:56:22,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153861103] [2022-07-12 06:56:22,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:22,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 06:56:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 06:56:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 06:56:22,926 INFO L87 Difference]: Start difference. First operand 14001 states and 23013 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-07-12 06:56:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:24,021 INFO L93 Difference]: Finished difference Result 30414 states and 50389 transitions. [2022-07-12 06:56:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 06:56:24,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2022-07-12 06:56:24,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:24,067 INFO L225 Difference]: With dead ends: 30414 [2022-07-12 06:56:24,067 INFO L226 Difference]: Without dead ends: 20721 [2022-07-12 06:56:24,087 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 [2022-07-12 06:56:24,088 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 196 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1148 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 [2022-07-12 06:56:24,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1148 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:24,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20721 states. [2022-07-12 06:56:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20721 to 20719. [2022-07-12 06:56:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20719 states, 20718 states have (on average 1.6462496379959455) internal successors, (34107), 20718 states have internal predecessors, (34107), 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) [2022-07-12 06:56:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20719 states to 20719 states and 34107 transitions. [2022-07-12 06:56:25,221 INFO L78 Accepts]: Start accepts. Automaton has 20719 states and 34107 transitions. Word has length 112 [2022-07-12 06:56:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:25,222 INFO L495 AbstractCegarLoop]: Abstraction has 20719 states and 34107 transitions. [2022-07-12 06:56:25,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-07-12 06:56:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 20719 states and 34107 transitions. [2022-07-12 06:56:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-12 06:56:25,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:25,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:25,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 06:56:25,223 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:25,224 INFO L85 PathProgramCache]: Analyzing trace with hash 558867563, now seen corresponding path program 1 times [2022-07-12 06:56:25,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:25,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309265280] [2022-07-12 06:56:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:25,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:25,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:25,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309265280] [2022-07-12 06:56:25,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309265280] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:25,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:25,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 06:56:25,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125587784] [2022-07-12 06:56:25,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:25,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 06:56:25,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:25,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 06:56:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 06:56:25,297 INFO L87 Difference]: Start difference. First operand 20719 states and 34107 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2022-07-12 06:56:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:28,044 INFO L93 Difference]: Finished difference Result 67417 states and 111246 transitions. [2022-07-12 06:56:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 06:56:28,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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 113 [2022-07-12 06:56:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:28,136 INFO L225 Difference]: With dead ends: 67417 [2022-07-12 06:56:28,136 INFO L226 Difference]: Without dead ends: 46931 [2022-07-12 06:56:28,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:56:28,169 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 622 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:56:28,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1575 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46931 states. [2022-07-12 06:56:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46931 to 33736. [2022-07-12 06:56:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33736 states, 33735 states have (on average 1.6415295686971987) internal successors, (55377), 33735 states have internal predecessors, (55377), 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) [2022-07-12 06:56:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33736 states to 33736 states and 55377 transitions. [2022-07-12 06:56:30,375 INFO L78 Accepts]: Start accepts. Automaton has 33736 states and 55377 transitions. Word has length 113 [2022-07-12 06:56:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:30,376 INFO L495 AbstractCegarLoop]: Abstraction has 33736 states and 55377 transitions. [2022-07-12 06:56:30,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2022-07-12 06:56:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 33736 states and 55377 transitions. [2022-07-12 06:56:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-12 06:56:30,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:30,377 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:30,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 06:56:30,378 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:30,378 INFO L85 PathProgramCache]: Analyzing trace with hash 87079248, now seen corresponding path program 1 times [2022-07-12 06:56:30,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:30,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87186346] [2022-07-12 06:56:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:30,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:30,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:30,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87186346] [2022-07-12 06:56:30,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87186346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:30,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:30,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 06:56:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591649663] [2022-07-12 06:56:30,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:30,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 06:56:30,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 06:56:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 06:56:30,424 INFO L87 Difference]: Start difference. First operand 33736 states and 55377 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2022-07-12 06:56:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:35,194 INFO L93 Difference]: Finished difference Result 109311 states and 179862 transitions. [2022-07-12 06:56:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 06:56:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 114 [2022-07-12 06:56:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:35,348 INFO L225 Difference]: With dead ends: 109311 [2022-07-12 06:56:35,348 INFO L226 Difference]: Without dead ends: 75808 [2022-07-12 06:56:35,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:56:35,402 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 620 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:56:35,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 1622 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:56:35,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75808 states. [2022-07-12 06:56:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75808 to 54629. [2022-07-12 06:56:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54629 states, 54628 states have (on average 1.6367979790583584) internal successors, (89415), 54628 states have internal predecessors, (89415), 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) [2022-07-12 06:56:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54629 states to 54629 states and 89415 transitions. [2022-07-12 06:56:39,608 INFO L78 Accepts]: Start accepts. Automaton has 54629 states and 89415 transitions. Word has length 114 [2022-07-12 06:56:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:56:39,609 INFO L495 AbstractCegarLoop]: Abstraction has 54629 states and 89415 transitions. [2022-07-12 06:56:39,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2022-07-12 06:56:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 54629 states and 89415 transitions. [2022-07-12 06:56:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-12 06:56:39,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:56:39,610 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:56:39,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 06:56:39,611 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:56:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:56:39,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1648898606, now seen corresponding path program 1 times [2022-07-12 06:56:39,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:56:39,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483944952] [2022-07-12 06:56:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:56:39,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:56:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:56:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:56:39,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:56:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483944952] [2022-07-12 06:56:39,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483944952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:56:39,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:56:39,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 06:56:39,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111703254] [2022-07-12 06:56:39,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:56:39,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 06:56:39,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:56:39,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 06:56:39,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 06:56:39,822 INFO L87 Difference]: Start difference. First operand 54629 states and 89415 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2022-07-12 06:56:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:56:48,197 INFO L93 Difference]: Finished difference Result 175037 states and 287174 transitions. [2022-07-12 06:56:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 06:56:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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 115 [2022-07-12 06:56:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:56:48,442 INFO L225 Difference]: With dead ends: 175037 [2022-07-12 06:56:48,443 INFO L226 Difference]: Without dead ends: 120641 [2022-07-12 06:56:48,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:56:48,516 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 618 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:56:48,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1687 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:56:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120641 states.