./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.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 0451b84ecb7a9b49daa0d007f78b5b7787a8fa890fb4c838a3b9a1c5be28a03a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:39:36,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:39:36,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:39:36,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:39:36,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:39:36,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:39:36,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:39:36,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:39:36,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:39:36,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:39:36,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:39:36,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:39:36,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:39:36,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:39:36,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:39:36,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:39:36,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:39:36,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:39:36,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:39:36,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:39:36,834 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:39:36,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:39:36,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:39:36,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:39:36,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:39:36,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:39:36,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:39:36,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:39:36,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:39:36,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:39:36,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:39:36,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:39:36,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:39:36,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:39:36,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:39:36,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:39:36,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:39:36,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:39:36,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:39:36,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:39:36,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:39:36,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:39:36,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:39:36,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:39:36,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:39:36,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:39:36,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:39:36,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:39:36,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:39:36,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:39:36,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:39:36,875 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:39:36,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:39:36,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:39:36,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:39:36,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:39:36,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:39:36,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:39:36,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:39:36,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:39:36,877 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:39:36,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:39:36,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:39:36,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:39:36,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:39:36,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:39:36,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:39:36,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:39:36,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:39:36,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:39:36,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:39:36,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:39:36,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:39:36,880 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:39:36,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:39:36,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:39:36,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0451b84ecb7a9b49daa0d007f78b5b7787a8fa890fb4c838a3b9a1c5be28a03a [2022-07-13 18:39:37,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:39:37,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:39:37,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:39:37,106 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:39:37,107 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:39:37,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-07-13 18:39:37,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1685b0f83/e0a2df49af224d289abae6c8076a28ca/FLAG6098a1b63 [2022-07-13 18:39:37,453 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:39:37,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-07-13 18:39:37,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1685b0f83/e0a2df49af224d289abae6c8076a28ca/FLAG6098a1b63 [2022-07-13 18:39:37,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1685b0f83/e0a2df49af224d289abae6c8076a28ca [2022-07-13 18:39:37,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:39:37,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:39:37,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:39:37,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:39:37,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:39:37,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:39:37" (1/1) ... [2022-07-13 18:39:37,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72fee7f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:37, skipping insertion in model container [2022-07-13 18:39:37,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:39:37" (1/1) ... [2022-07-13 18:39:37,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:39:37,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:39:38,078 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_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2022-07-13 18:39:38,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:39:38,105 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:39:38,126 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_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2022-07-13 18:39:38,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:39:38,161 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:39:38,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38 WrapperNode [2022-07-13 18:39:38,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:39:38,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:39:38,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:39:38,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:39:38,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (1/1) ... [2022-07-13 18:39:38,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (1/1) ... [2022-07-13 18:39:38,210 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 316 [2022-07-13 18:39:38,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:39:38,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:39:38,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:39:38,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:39:38,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (1/1) ... [2022-07-13 18:39:38,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (1/1) ... [2022-07-13 18:39:38,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (1/1) ... [2022-07-13 18:39:38,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (1/1) ... [2022-07-13 18:39:38,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (1/1) ... [2022-07-13 18:39:38,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (1/1) ... [2022-07-13 18:39:38,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (1/1) ... [2022-07-13 18:39:38,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:39:38,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:39:38,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:39:38,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:39:38,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (1/1) ... [2022-07-13 18:39:38,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:39:38,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:39:38,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 18:39:38,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 18:39:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:39:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:39:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:39:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:39:38,345 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:39:38,346 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:39:38,617 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:39:38,626 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:39:38,626 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 18:39:38,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:39:38 BoogieIcfgContainer [2022-07-13 18:39:38,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:39:38,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:39:38,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:39:38,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:39:38,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:39:37" (1/3) ... [2022-07-13 18:39:38,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3374780f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:39:38, skipping insertion in model container [2022-07-13 18:39:38,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:39:38" (2/3) ... [2022-07-13 18:39:38,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3374780f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:39:38, skipping insertion in model container [2022-07-13 18:39:38,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:39:38" (3/3) ... [2022-07-13 18:39:38,637 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-07-13 18:39:38,648 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:39:38,648 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:39:38,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:39:38,691 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@397c4bb5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24142255 [2022-07-13 18:39:38,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:39:38,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 80 states have (on average 1.675) internal successors, (134), 81 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 18:39:38,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:38,700 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] [2022-07-13 18:39:38,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:38,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1356231251, now seen corresponding path program 1 times [2022-07-13 18:39:38,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:38,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809836535] [2022-07-13 18:39:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:38,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:38,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:38,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809836535] [2022-07-13 18:39:38,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809836535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:38,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:38,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:39:38,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700333462] [2022-07-13 18:39:38,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:38,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:39:38,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:39:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:38,915 INFO L87 Difference]: Start difference. First operand has 82 states, 80 states have (on average 1.675) internal successors, (134), 81 states have internal predecessors, (134), 0 states have call successors, (0), 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 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:38,987 INFO L93 Difference]: Finished difference Result 190 states and 300 transitions. [2022-07-13 18:39:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:39:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2022-07-13 18:39:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:39,002 INFO L225 Difference]: With dead ends: 190 [2022-07-13 18:39:39,002 INFO L226 Difference]: Without dead ends: 122 [2022-07-13 18:39:39,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:39,006 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 87 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:39:39,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 267 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:39:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-13 18:39:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-07-13 18:39:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.495798319327731) internal successors, (178), 119 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 178 transitions. [2022-07-13 18:39:39,040 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 178 transitions. Word has length 37 [2022-07-13 18:39:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:39,040 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 178 transitions. [2022-07-13 18:39:39,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 178 transitions. [2022-07-13 18:39:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 18:39:39,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:39,041 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] [2022-07-13 18:39:39,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:39:39,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash -775084619, now seen corresponding path program 1 times [2022-07-13 18:39:39,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:39,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236885479] [2022-07-13 18:39:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:39,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:39,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:39,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236885479] [2022-07-13 18:39:39,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236885479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:39,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:39,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:39:39,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700315748] [2022-07-13 18:39:39,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:39,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:39:39,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:39,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:39:39,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:39,125 INFO L87 Difference]: Start difference. First operand 120 states and 178 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:39,177 INFO L93 Difference]: Finished difference Result 288 states and 442 transitions. [2022-07-13 18:39:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:39:39,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2022-07-13 18:39:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:39,179 INFO L225 Difference]: With dead ends: 288 [2022-07-13 18:39:39,179 INFO L226 Difference]: Without dead ends: 188 [2022-07-13 18:39:39,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:39,180 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 72 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 219 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 [2022-07-13 18:39:39,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 219 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:39:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-13 18:39:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-07-13 18:39:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.518918918918919) internal successors, (281), 185 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 281 transitions. [2022-07-13 18:39:39,197 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 281 transitions. Word has length 38 [2022-07-13 18:39:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:39,197 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 281 transitions. [2022-07-13 18:39:39,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 281 transitions. [2022-07-13 18:39:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 18:39:39,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:39,199 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] [2022-07-13 18:39:39,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:39:39,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:39,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:39,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1501816372, now seen corresponding path program 1 times [2022-07-13 18:39:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:39,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665334686] [2022-07-13 18:39:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:39,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:39,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:39,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665334686] [2022-07-13 18:39:39,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665334686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:39,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:39,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:39:39,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467949834] [2022-07-13 18:39:39,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:39,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:39:39,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:39,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:39:39,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:39:39,272 INFO L87 Difference]: Start difference. First operand 186 states and 281 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:39,383 INFO L93 Difference]: Finished difference Result 850 states and 1325 transitions. [2022-07-13 18:39:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:39:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2022-07-13 18:39:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:39,387 INFO L225 Difference]: With dead ends: 850 [2022-07-13 18:39:39,387 INFO L226 Difference]: Without dead ends: 684 [2022-07-13 18:39:39,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:39:39,388 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 462 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:39:39,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 620 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:39:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-07-13 18:39:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 350. [2022-07-13 18:39:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.527220630372493) internal successors, (533), 349 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 533 transitions. [2022-07-13 18:39:39,454 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 533 transitions. Word has length 39 [2022-07-13 18:39:39,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:39,455 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 533 transitions. [2022-07-13 18:39:39,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 533 transitions. [2022-07-13 18:39:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 18:39:39,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:39,456 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] [2022-07-13 18:39:39,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:39:39,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash -707789038, now seen corresponding path program 1 times [2022-07-13 18:39:39,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:39,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188025891] [2022-07-13 18:39:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:39,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:39,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:39,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188025891] [2022-07-13 18:39:39,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188025891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:39,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:39,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:39:39,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909038145] [2022-07-13 18:39:39,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:39,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:39:39,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:39,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:39:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:39:39,525 INFO L87 Difference]: Start difference. First operand 350 states and 533 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:39,670 INFO L93 Difference]: Finished difference Result 1228 states and 1888 transitions. [2022-07-13 18:39:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:39:39,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2022-07-13 18:39:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:39,676 INFO L225 Difference]: With dead ends: 1228 [2022-07-13 18:39:39,676 INFO L226 Difference]: Without dead ends: 898 [2022-07-13 18:39:39,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:39:39,687 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 237 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:39:39,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 332 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:39:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-07-13 18:39:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 894. [2022-07-13 18:39:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 1.528555431131019) internal successors, (1365), 893 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1365 transitions. [2022-07-13 18:39:39,784 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1365 transitions. Word has length 40 [2022-07-13 18:39:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:39,785 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1365 transitions. [2022-07-13 18:39:39,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1365 transitions. [2022-07-13 18:39:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 18:39:39,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:39,790 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] [2022-07-13 18:39:39,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 18:39:39,790 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:39,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1119396873, now seen corresponding path program 1 times [2022-07-13 18:39:39,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:39,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660248246] [2022-07-13 18:39:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:39,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:39,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660248246] [2022-07-13 18:39:39,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660248246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:39,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:39,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:39:39,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708000819] [2022-07-13 18:39:39,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:39,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:39:39,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:39,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:39:39,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:39:39,885 INFO L87 Difference]: Start difference. First operand 894 states and 1365 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:40,108 INFO L93 Difference]: Finished difference Result 2642 states and 4055 transitions. [2022-07-13 18:39:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:39:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2022-07-13 18:39:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:40,115 INFO L225 Difference]: With dead ends: 2642 [2022-07-13 18:39:40,115 INFO L226 Difference]: Without dead ends: 1768 [2022-07-13 18:39:40,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:39:40,117 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 470 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:39:40,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 137 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:39:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2022-07-13 18:39:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1766. [2022-07-13 18:39:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 1.5257790368271955) internal successors, (2693), 1765 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2693 transitions. [2022-07-13 18:39:40,251 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2693 transitions. Word has length 42 [2022-07-13 18:39:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:40,252 INFO L495 AbstractCegarLoop]: Abstraction has 1766 states and 2693 transitions. [2022-07-13 18:39:40,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2693 transitions. [2022-07-13 18:39:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 18:39:40,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:40,256 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] [2022-07-13 18:39:40,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 18:39:40,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:40,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1549405756, now seen corresponding path program 1 times [2022-07-13 18:39:40,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:40,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374467056] [2022-07-13 18:39:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:40,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:40,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:40,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374467056] [2022-07-13 18:39:40,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374467056] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:40,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:40,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:39:40,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067122860] [2022-07-13 18:39:40,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:39:40,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:39:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:39:40,353 INFO L87 Difference]: Start difference. First operand 1766 states and 2693 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:40,629 INFO L93 Difference]: Finished difference Result 3608 states and 5462 transitions. [2022-07-13 18:39:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:39:40,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2022-07-13 18:39:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:40,639 INFO L225 Difference]: With dead ends: 3608 [2022-07-13 18:39:40,639 INFO L226 Difference]: Without dead ends: 3606 [2022-07-13 18:39:40,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:39:40,640 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 174 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:39:40,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 567 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:39:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2022-07-13 18:39:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 1862. [2022-07-13 18:39:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 1.4986566362170877) internal successors, (2789), 1861 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2789 transitions. [2022-07-13 18:39:40,784 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2789 transitions. Word has length 42 [2022-07-13 18:39:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:40,784 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2789 transitions. [2022-07-13 18:39:40,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2789 transitions. [2022-07-13 18:39:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 18:39:40,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:40,786 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] [2022-07-13 18:39:40,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 18:39:40,786 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:40,787 INFO L85 PathProgramCache]: Analyzing trace with hash -776365166, now seen corresponding path program 1 times [2022-07-13 18:39:40,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:40,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796056521] [2022-07-13 18:39:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:40,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:40,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:40,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796056521] [2022-07-13 18:39:40,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796056521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:40,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:40,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:39:40,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688217047] [2022-07-13 18:39:40,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:40,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:39:40,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:39:40,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:40,841 INFO L87 Difference]: Start difference. First operand 1862 states and 2789 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:41,076 INFO L93 Difference]: Finished difference Result 4962 states and 7385 transitions. [2022-07-13 18:39:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:39:41,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-07-13 18:39:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:41,086 INFO L225 Difference]: With dead ends: 4962 [2022-07-13 18:39:41,086 INFO L226 Difference]: Without dead ends: 3120 [2022-07-13 18:39:41,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:41,089 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 61 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:39:41,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 201 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:39:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2022-07-13 18:39:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 3078. [2022-07-13 18:39:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3078 states, 3077 states have (on average 1.460838479038024) internal successors, (4495), 3077 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 4495 transitions. [2022-07-13 18:39:41,317 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 4495 transitions. Word has length 43 [2022-07-13 18:39:41,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:41,318 INFO L495 AbstractCegarLoop]: Abstraction has 3078 states and 4495 transitions. [2022-07-13 18:39:41,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 4495 transitions. [2022-07-13 18:39:41,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 18:39:41,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:41,318 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] [2022-07-13 18:39:41,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 18:39:41,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1884301642, now seen corresponding path program 1 times [2022-07-13 18:39:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:41,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634484511] [2022-07-13 18:39:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:41,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:41,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:41,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634484511] [2022-07-13 18:39:41,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634484511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:41,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:41,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:39:41,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143369433] [2022-07-13 18:39:41,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:41,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:39:41,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:39:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:41,339 INFO L87 Difference]: Start difference. First operand 3078 states and 4495 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:41,649 INFO L93 Difference]: Finished difference Result 6141 states and 9029 transitions. [2022-07-13 18:39:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:39:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-07-13 18:39:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:41,660 INFO L225 Difference]: With dead ends: 6141 [2022-07-13 18:39:41,660 INFO L226 Difference]: Without dead ends: 4298 [2022-07-13 18:39:41,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:41,663 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 78 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 264 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 [2022-07-13 18:39:41,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 264 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:39:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2022-07-13 18:39:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4296. [2022-07-13 18:39:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 4295 states have (on average 1.4456344586728755) internal successors, (6209), 4295 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6209 transitions. [2022-07-13 18:39:41,956 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6209 transitions. Word has length 43 [2022-07-13 18:39:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:41,956 INFO L495 AbstractCegarLoop]: Abstraction has 4296 states and 6209 transitions. [2022-07-13 18:39:41,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:41,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6209 transitions. [2022-07-13 18:39:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 18:39:41,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:41,958 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:39:41,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 18:39:41,959 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:41,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1507478329, now seen corresponding path program 1 times [2022-07-13 18:39:41,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:41,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248006588] [2022-07-13 18:39:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:41,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:39:42,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:42,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248006588] [2022-07-13 18:39:42,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248006588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:42,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:42,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:39:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295107842] [2022-07-13 18:39:42,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:42,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:39:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:39:42,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:39:42,024 INFO L87 Difference]: Start difference. First operand 4296 states and 6209 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:42,494 INFO L93 Difference]: Finished difference Result 7676 states and 11195 transitions. [2022-07-13 18:39:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:39:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-13 18:39:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:42,511 INFO L225 Difference]: With dead ends: 7676 [2022-07-13 18:39:42,511 INFO L226 Difference]: Without dead ends: 6122 [2022-07-13 18:39:42,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:39:42,515 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 326 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:39:42,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 528 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:39:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6122 states. [2022-07-13 18:39:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6122 to 5572. [2022-07-13 18:39:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5572 states, 5571 states have (on average 1.4448034464189552) internal successors, (8049), 5571 states have internal predecessors, (8049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5572 states to 5572 states and 8049 transitions. [2022-07-13 18:39:42,924 INFO L78 Accepts]: Start accepts. Automaton has 5572 states and 8049 transitions. Word has length 61 [2022-07-13 18:39:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:42,924 INFO L495 AbstractCegarLoop]: Abstraction has 5572 states and 8049 transitions. [2022-07-13 18:39:42,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 5572 states and 8049 transitions. [2022-07-13 18:39:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 18:39:42,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:42,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:39:42,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 18:39:42,926 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:42,927 INFO L85 PathProgramCache]: Analyzing trace with hash 910806190, now seen corresponding path program 1 times [2022-07-13 18:39:42,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:42,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652251768] [2022-07-13 18:39:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:42,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:42,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652251768] [2022-07-13 18:39:42,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652251768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:42,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:42,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:39:42,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252028680] [2022-07-13 18:39:42,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:42,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:39:42,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:39:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:42,952 INFO L87 Difference]: Start difference. First operand 5572 states and 8049 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:43,378 INFO L93 Difference]: Finished difference Result 9015 states and 12955 transitions. [2022-07-13 18:39:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:39:43,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2022-07-13 18:39:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:43,393 INFO L225 Difference]: With dead ends: 9015 [2022-07-13 18:39:43,393 INFO L226 Difference]: Without dead ends: 5862 [2022-07-13 18:39:43,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:43,397 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 62 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:39:43,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 243 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:39:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2022-07-13 18:39:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5636. [2022-07-13 18:39:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5636 states, 5635 states have (on average 1.4175687666370895) internal successors, (7988), 5635 states have internal predecessors, (7988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5636 states to 5636 states and 7988 transitions. [2022-07-13 18:39:43,902 INFO L78 Accepts]: Start accepts. Automaton has 5636 states and 7988 transitions. Word has length 61 [2022-07-13 18:39:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:43,902 INFO L495 AbstractCegarLoop]: Abstraction has 5636 states and 7988 transitions. [2022-07-13 18:39:43,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5636 states and 7988 transitions. [2022-07-13 18:39:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 18:39:43,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:43,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:39:43,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 18:39:43,904 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash -632426569, now seen corresponding path program 1 times [2022-07-13 18:39:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082460865] [2022-07-13 18:39:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 18:39:43,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:43,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082460865] [2022-07-13 18:39:43,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082460865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:43,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:43,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:39:43,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201267641] [2022-07-13 18:39:43,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:43,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:39:43,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:43,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:39:43,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:39:43,947 INFO L87 Difference]: Start difference. First operand 5636 states and 7988 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:44,407 INFO L93 Difference]: Finished difference Result 7819 states and 11179 transitions. [2022-07-13 18:39:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:39:44,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-13 18:39:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:44,431 INFO L225 Difference]: With dead ends: 7819 [2022-07-13 18:39:44,432 INFO L226 Difference]: Without dead ends: 7005 [2022-07-13 18:39:44,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:39:44,436 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 331 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:39:44,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 507 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:39:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2022-07-13 18:39:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 6432. [2022-07-13 18:39:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6432 states, 6431 states have (on average 1.4193749028144924) internal successors, (9128), 6431 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6432 states to 6432 states and 9128 transitions. [2022-07-13 18:39:44,875 INFO L78 Accepts]: Start accepts. Automaton has 6432 states and 9128 transitions. Word has length 61 [2022-07-13 18:39:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:44,875 INFO L495 AbstractCegarLoop]: Abstraction has 6432 states and 9128 transitions. [2022-07-13 18:39:44,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 6432 states and 9128 transitions. [2022-07-13 18:39:44,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 18:39:44,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:44,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:39:44,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 18:39:44,877 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1466148538, now seen corresponding path program 1 times [2022-07-13 18:39:44,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:44,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341038933] [2022-07-13 18:39:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:44,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:45,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:45,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341038933] [2022-07-13 18:39:45,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341038933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:39:45,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650817458] [2022-07-13 18:39:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:39:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:39:45,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:39:45,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 18:39:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:45,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 18:39:45,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:39:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:39:45,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:39:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:39:45,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650817458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:39:45,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:39:45,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2022-07-13 18:39:45,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71273573] [2022-07-13 18:39:45,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:39:45,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 18:39:45,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 18:39:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-13 18:39:45,436 INFO L87 Difference]: Start difference. First operand 6432 states and 9128 transitions. Second operand has 14 states, 14 states have (on average 12.428571428571429) internal successors, (174), 14 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:39:55,658 INFO L93 Difference]: Finished difference Result 62408 states and 87295 transitions. [2022-07-13 18:39:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-13 18:39:55,660 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.428571428571429) internal successors, (174), 14 states have internal predecessors, (174), 0 states have call successors, (0), 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 62 [2022-07-13 18:39:55,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:39:55,791 INFO L225 Difference]: With dead ends: 62408 [2022-07-13 18:39:55,792 INFO L226 Difference]: Without dead ends: 56276 [2022-07-13 18:39:55,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6084 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2538, Invalid=11982, Unknown=0, NotChecked=0, Total=14520 [2022-07-13 18:39:55,817 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 6102 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6102 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 18:39:55,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6102 Valid, 2018 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 18:39:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56276 states. [2022-07-13 18:39:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56276 to 23734. [2022-07-13 18:39:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23734 states, 23733 states have (on average 1.3861711540892427) internal successors, (32898), 23733 states have internal predecessors, (32898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23734 states to 23734 states and 32898 transitions. [2022-07-13 18:39:58,652 INFO L78 Accepts]: Start accepts. Automaton has 23734 states and 32898 transitions. Word has length 62 [2022-07-13 18:39:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:39:58,652 INFO L495 AbstractCegarLoop]: Abstraction has 23734 states and 32898 transitions. [2022-07-13 18:39:58,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.428571428571429) internal successors, (174), 14 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:39:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 23734 states and 32898 transitions. [2022-07-13 18:39:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 18:39:58,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:39:58,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:39:58,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 18:39:58,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 18:39:58,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:39:58,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:39:58,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1241645965, now seen corresponding path program 1 times [2022-07-13 18:39:58,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:39:58,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543585168] [2022-07-13 18:39:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:39:58,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:39:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:39:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:39:58,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:39:58,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543585168] [2022-07-13 18:39:58,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543585168] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:39:58,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:39:58,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:39:58,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142983910] [2022-07-13 18:39:58,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:39:58,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:39:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:39:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:39:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:39:58,906 INFO L87 Difference]: Start difference. First operand 23734 states and 32898 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:40:03,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:40:03,419 INFO L93 Difference]: Finished difference Result 62927 states and 86755 transitions. [2022-07-13 18:40:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:40:03,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-07-13 18:40:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:40:03,494 INFO L225 Difference]: With dead ends: 62927 [2022-07-13 18:40:03,495 INFO L226 Difference]: Without dead ends: 42202 [2022-07-13 18:40:03,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:40:03,521 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 57 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:40:03,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 223 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:40:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42202 states. [2022-07-13 18:40:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42202 to 42151. [2022-07-13 18:40:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42151 states, 42150 states have (on average 1.3608778173190985) internal successors, (57361), 42150 states have internal predecessors, (57361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:40:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42151 states to 42151 states and 57361 transitions. [2022-07-13 18:40:08,342 INFO L78 Accepts]: Start accepts. Automaton has 42151 states and 57361 transitions. Word has length 63 [2022-07-13 18:40:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:40:08,342 INFO L495 AbstractCegarLoop]: Abstraction has 42151 states and 57361 transitions. [2022-07-13 18:40:08,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:40:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 42151 states and 57361 transitions. [2022-07-13 18:40:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 18:40:08,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:40:08,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:40:08,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 18:40:08,349 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:40:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:40:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1327129075, now seen corresponding path program 1 times [2022-07-13 18:40:08,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:40:08,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050874575] [2022-07-13 18:40:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:40:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:40:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:40:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:40:08,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:40:08,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050874575] [2022-07-13 18:40:08,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050874575] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:40:08,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:40:08,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:40:08,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641986479] [2022-07-13 18:40:08,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:40:08,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:40:08,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:40:08,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:40:08,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:40:08,505 INFO L87 Difference]: Start difference. First operand 42151 states and 57361 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:40:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:40:14,281 INFO L93 Difference]: Finished difference Result 65760 states and 90224 transitions. [2022-07-13 18:40:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:40:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 64 [2022-07-13 18:40:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:40:14,370 INFO L225 Difference]: With dead ends: 65760 [2022-07-13 18:40:14,371 INFO L226 Difference]: Without dead ends: 55869 [2022-07-13 18:40:14,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:40:14,399 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 317 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:40:14,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 568 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:40:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55869 states. [2022-07-13 18:40:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55869 to 50963. [2022-07-13 18:40:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50963 states, 50962 states have (on average 1.3574231780542365) internal successors, (69177), 50962 states have internal predecessors, (69177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:40:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50963 states to 50963 states and 69177 transitions. [2022-07-13 18:40:20,411 INFO L78 Accepts]: Start accepts. Automaton has 50963 states and 69177 transitions. Word has length 64 [2022-07-13 18:40:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:40:20,412 INFO L495 AbstractCegarLoop]: Abstraction has 50963 states and 69177 transitions. [2022-07-13 18:40:20,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:40:20,412 INFO L276 IsEmpty]: Start isEmpty. Operand 50963 states and 69177 transitions. [2022-07-13 18:40:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 18:40:20,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:40:20,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:40:20,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 18:40:20,416 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:40:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:40:20,417 INFO L85 PathProgramCache]: Analyzing trace with hash 684443982, now seen corresponding path program 1 times [2022-07-13 18:40:20,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:40:20,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761455204] [2022-07-13 18:40:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:40:20,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:40:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:40:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:40:20,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:40:20,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761455204] [2022-07-13 18:40:20,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761455204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:40:20,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:40:20,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:40:20,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635307934] [2022-07-13 18:40:20,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:40:20,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:40:20,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:40:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:40:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:40:20,449 INFO L87 Difference]: Start difference. First operand 50963 states and 69177 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:40:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:40:26,923 INFO L93 Difference]: Finished difference Result 107654 states and 145658 transitions. [2022-07-13 18:40:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:40:26,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-07-13 18:40:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:40:27,028 INFO L225 Difference]: With dead ends: 107654 [2022-07-13 18:40:27,028 INFO L226 Difference]: Without dead ends: 58837 [2022-07-13 18:40:27,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:40:27,069 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 59 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:40:27,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 253 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:40:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58837 states. [2022-07-13 18:40:33,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58837 to 50005. [2022-07-13 18:40:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50005 states, 50004 states have (on average 1.3393928485721143) internal successors, (66975), 50004 states have internal predecessors, (66975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:40:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50005 states to 50005 states and 66975 transitions. [2022-07-13 18:40:33,125 INFO L78 Accepts]: Start accepts. Automaton has 50005 states and 66975 transitions. Word has length 64 [2022-07-13 18:40:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:40:33,125 INFO L495 AbstractCegarLoop]: Abstraction has 50005 states and 66975 transitions. [2022-07-13 18:40:33,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:40:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 50005 states and 66975 transitions. [2022-07-13 18:40:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 18:40:33,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:40:33,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:40:33,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 18:40:33,131 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:40:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:40:33,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1711192576, now seen corresponding path program 1 times [2022-07-13 18:40:33,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:40:33,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513235617] [2022-07-13 18:40:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:40:33,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:40:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:40:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:40:33,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:40:33,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513235617] [2022-07-13 18:40:33,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513235617] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:40:33,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:40:33,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:40:33,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532602529] [2022-07-13 18:40:33,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:40:33,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:40:33,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:40:33,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:40:33,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:40:33,159 INFO L87 Difference]: Start difference. First operand 50005 states and 66975 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:40:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:40:41,076 INFO L93 Difference]: Finished difference Result 116854 states and 156223 transitions. [2022-07-13 18:40:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:40:41,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 66 [2022-07-13 18:40:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:40:41,176 INFO L225 Difference]: With dead ends: 116854 [2022-07-13 18:40:41,176 INFO L226 Difference]: Without dead ends: 66919 [2022-07-13 18:40:41,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:40:41,213 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 426 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:40:41,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 141 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:40:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66919 states.