./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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.3.1.ufo.BOUNDED-6.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 3da1085986a33686aa7ffc74caa759bc9bd987d241f97554ff5ad69a436a7e40 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 18:03:32,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 18:03:32,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 18:03:32,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 18:03:32,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 18:03:32,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 18:03:32,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 18:03:32,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 18:03:32,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 18:03:32,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 18:03:32,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 18:03:32,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 18:03:32,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 18:03:32,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 18:03:32,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 18:03:32,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 18:03:32,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 18:03:32,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 18:03:32,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 18:03:32,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 18:03:32,720 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 18:03:32,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 18:03:32,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 18:03:32,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 18:03:32,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 18:03:32,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 18:03:32,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 18:03:32,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 18:03:32,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 18:03:32,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 18:03:32,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 18:03:32,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 18:03:32,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 18:03:32,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 18:03:32,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 18:03:32,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 18:03:32,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 18:03:32,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 18:03:32,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 18:03:32,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 18:03:32,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 18:03:32,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 18:03:32,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 18:03:32,764 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 18:03:32,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 18:03:32,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 18:03:32,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 18:03:32,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 18:03:32,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 18:03:32,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 18:03:32,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 18:03:32,771 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 18:03:32,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 18:03:32,772 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 18:03:32,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 18:03:32,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 18:03:32,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 18:03:32,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 18:03:32,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 18:03:32,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 18:03:32,773 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 18:03:32,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 18:03:32,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 18:03:32,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 18:03:32,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 18:03:32,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 18:03:32,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 18:03:32,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 18:03:32,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 18:03:32,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 18:03:32,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 18:03:32,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 18:03:32,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 18:03:32,776 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 18:03:32,776 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 18:03:32,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 18:03:32,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3da1085986a33686aa7ffc74caa759bc9bd987d241f97554ff5ad69a436a7e40 [2022-07-19 18:03:33,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 18:03:33,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 18:03:33,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 18:03:33,052 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 18:03:33,053 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 18:03:33,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-07-19 18:03:33,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8622d7a96/fd72702378634d5bbb8950d811a3ca66/FLAG465db267a [2022-07-19 18:03:33,603 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 18:03:33,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-07-19 18:03:33,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8622d7a96/fd72702378634d5bbb8950d811a3ca66/FLAG465db267a [2022-07-19 18:03:34,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8622d7a96/fd72702378634d5bbb8950d811a3ca66 [2022-07-19 18:03:34,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 18:03:34,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 18:03:34,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 18:03:34,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 18:03:34,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 18:03:34,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6682bd6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34, skipping insertion in model container [2022-07-19 18:03:34,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 18:03:34,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 18:03:34,375 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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2022-07-19 18:03:34,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 18:03:34,415 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 18:03:34,446 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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2022-07-19 18:03:34,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 18:03:34,488 INFO L208 MainTranslator]: Completed translation [2022-07-19 18:03:34,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34 WrapperNode [2022-07-19 18:03:34,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 18:03:34,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 18:03:34,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 18:03:34,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 18:03:34,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,530 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 333 [2022-07-19 18:03:34,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 18:03:34,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 18:03:34,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 18:03:34,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 18:03:34,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 18:03:34,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 18:03:34,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 18:03:34,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 18:03:34,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (1/1) ... [2022-07-19 18:03:34,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 18:03:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 18:03:34,593 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) [2022-07-19 18:03:34,606 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 [2022-07-19 18:03:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 18:03:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 18:03:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 18:03:34,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 18:03:34,748 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 18:03:34,750 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 18:03:35,069 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 18:03:35,075 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 18:03:35,079 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 18:03:35,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 06:03:35 BoogieIcfgContainer [2022-07-19 18:03:35,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 18:03:35,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 18:03:35,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 18:03:35,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 18:03:35,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 06:03:34" (1/3) ... [2022-07-19 18:03:35,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a7836c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 06:03:35, skipping insertion in model container [2022-07-19 18:03:35,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 06:03:34" (2/3) ... [2022-07-19 18:03:35,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a7836c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 06:03:35, skipping insertion in model container [2022-07-19 18:03:35,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 06:03:35" (3/3) ... [2022-07-19 18:03:35,095 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-07-19 18:03:35,107 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 18:03:35,107 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 18:03:35,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 18:03:35,171 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@1b3e7e2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20d31bc1 [2022-07-19 18:03:35,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 18:03:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 18:03:35,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:35,196 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] [2022-07-19 18:03:35,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:35,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1258202004, now seen corresponding path program 1 times [2022-07-19 18:03:35,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:35,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43712843] [2022-07-19 18:03:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:35,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:35,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:35,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43712843] [2022-07-19 18:03:35,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43712843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:35,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:35,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:03:35,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028275720] [2022-07-19 18:03:35,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:35,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:03:35,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:35,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:03:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:03:35,501 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 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) [2022-07-19 18:03:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:35,594 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2022-07-19 18:03:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:03:35,604 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 [2022-07-19 18:03:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:35,621 INFO L225 Difference]: With dead ends: 199 [2022-07-19 18:03:35,621 INFO L226 Difference]: Without dead ends: 128 [2022-07-19 18:03:35,625 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 [2022-07-19 18:03:35,630 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 101 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 300 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 [2022-07-19 18:03:35,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 300 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:03:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-19 18:03:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-07-19 18:03:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.504) internal successors, (188), 125 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 188 transitions. [2022-07-19 18:03:35,701 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 188 transitions. Word has length 37 [2022-07-19 18:03:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:35,702 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 188 transitions. [2022-07-19 18:03:35,702 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) [2022-07-19 18:03:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 188 transitions. [2022-07-19 18:03:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 18:03:35,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:35,705 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] [2022-07-19 18:03:35,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 18:03:35,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:35,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:35,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2004783502, now seen corresponding path program 1 times [2022-07-19 18:03:35,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:35,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796920218] [2022-07-19 18:03:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:35,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:35,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:35,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796920218] [2022-07-19 18:03:35,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796920218] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:35,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:35,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:03:35,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257607255] [2022-07-19 18:03:35,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:35,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:03:35,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:03:35,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:03:35,791 INFO L87 Difference]: Start difference. First operand 126 states and 188 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) [2022-07-19 18:03:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:35,824 INFO L93 Difference]: Finished difference Result 306 states and 472 transitions. [2022-07-19 18:03:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:03:35,825 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 [2022-07-19 18:03:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:35,827 INFO L225 Difference]: With dead ends: 306 [2022-07-19 18:03:35,827 INFO L226 Difference]: Without dead ends: 200 [2022-07-19 18:03:35,828 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 [2022-07-19 18:03:35,829 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 81 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 254 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 [2022-07-19 18:03:35,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 254 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:03:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-19 18:03:35,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2022-07-19 18:03:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.5279187817258884) internal successors, (301), 197 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 301 transitions. [2022-07-19 18:03:35,849 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 301 transitions. Word has length 38 [2022-07-19 18:03:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:35,849 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 301 transitions. [2022-07-19 18:03:35,850 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) [2022-07-19 18:03:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 301 transitions. [2022-07-19 18:03:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 18:03:35,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:35,851 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] [2022-07-19 18:03:35,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 18:03:35,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:35,852 INFO L85 PathProgramCache]: Analyzing trace with hash 337157617, now seen corresponding path program 1 times [2022-07-19 18:03:35,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:35,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478861265] [2022-07-19 18:03:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:35,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:35,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:35,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478861265] [2022-07-19 18:03:35,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478861265] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:35,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:35,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:03:35,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641159603] [2022-07-19 18:03:35,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:35,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:03:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:35,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:03:35,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:03:35,944 INFO L87 Difference]: Start difference. First operand 198 states and 301 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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) [2022-07-19 18:03:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:35,984 INFO L93 Difference]: Finished difference Result 490 states and 759 transitions. [2022-07-19 18:03:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:03:35,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 [2022-07-19 18:03:35,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:35,986 INFO L225 Difference]: With dead ends: 490 [2022-07-19 18:03:35,987 INFO L226 Difference]: Without dead ends: 312 [2022-07-19 18:03:35,988 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 [2022-07-19 18:03:35,989 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 76 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 239 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 [2022-07-19 18:03:35,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 239 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:03:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-19 18:03:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2022-07-19 18:03:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.5307443365695792) internal successors, (473), 309 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 473 transitions. [2022-07-19 18:03:36,021 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 473 transitions. Word has length 39 [2022-07-19 18:03:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:36,021 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 473 transitions. [2022-07-19 18:03:36,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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) [2022-07-19 18:03:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 473 transitions. [2022-07-19 18:03:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 18:03:36,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:36,023 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] [2022-07-19 18:03:36,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 18:03:36,023 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1621587317, now seen corresponding path program 1 times [2022-07-19 18:03:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:36,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595317386] [2022-07-19 18:03:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:36,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:36,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595317386] [2022-07-19 18:03:36,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595317386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:36,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:36,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 18:03:36,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516386933] [2022-07-19 18:03:36,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:36,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 18:03:36,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 18:03:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:03:36,117 INFO L87 Difference]: Start difference. First operand 310 states and 473 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) [2022-07-19 18:03:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:36,329 INFO L93 Difference]: Finished difference Result 1470 states and 2285 transitions. [2022-07-19 18:03:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 18:03:36,330 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 [2022-07-19 18:03:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:36,336 INFO L225 Difference]: With dead ends: 1470 [2022-07-19 18:03:36,336 INFO L226 Difference]: Without dead ends: 1180 [2022-07-19 18:03:36,341 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 [2022-07-19 18:03:36,351 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 486 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 18:03:36,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 660 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 18:03:36,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-07-19 18:03:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 598. [2022-07-19 18:03:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.5226130653266332) internal successors, (909), 597 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 909 transitions. [2022-07-19 18:03:36,459 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 909 transitions. Word has length 40 [2022-07-19 18:03:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:36,461 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 909 transitions. [2022-07-19 18:03:36,461 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) [2022-07-19 18:03:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 909 transitions. [2022-07-19 18:03:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 18:03:36,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:36,465 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] [2022-07-19 18:03:36,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 18:03:36,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:36,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1289857042, now seen corresponding path program 1 times [2022-07-19 18:03:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:36,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840228204] [2022-07-19 18:03:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:36,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:36,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:36,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840228204] [2022-07-19 18:03:36,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840228204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:36,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:36,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 18:03:36,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860970376] [2022-07-19 18:03:36,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:36,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 18:03:36,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 18:03:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:03:36,617 INFO L87 Difference]: Start difference. First operand 598 states and 909 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:36,867 INFO L93 Difference]: Finished difference Result 2068 states and 3144 transitions. [2022-07-19 18:03:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 18:03:36,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 18:03:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:36,875 INFO L225 Difference]: With dead ends: 2068 [2022-07-19 18:03:36,875 INFO L226 Difference]: Without dead ends: 1490 [2022-07-19 18:03:36,876 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 [2022-07-19 18:03:36,880 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 317 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:03:36,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 362 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:03:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-07-19 18:03:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1486. [2022-07-19 18:03:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 1.5063973063973064) internal successors, (2237), 1485 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2237 transitions. [2022-07-19 18:03:37,077 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2237 transitions. Word has length 41 [2022-07-19 18:03:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:37,077 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 2237 transitions. [2022-07-19 18:03:37,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2237 transitions. [2022-07-19 18:03:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 18:03:37,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:37,078 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] [2022-07-19 18:03:37,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 18:03:37,079 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash 97793413, now seen corresponding path program 1 times [2022-07-19 18:03:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:37,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485656279] [2022-07-19 18:03:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:37,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:37,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:37,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485656279] [2022-07-19 18:03:37,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485656279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:37,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:37,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:03:37,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709469716] [2022-07-19 18:03:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 18:03:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 18:03:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:03:37,144 INFO L87 Difference]: Start difference. First operand 1486 states and 2237 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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) [2022-07-19 18:03:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:37,597 INFO L93 Difference]: Finished difference Result 4418 states and 6671 transitions. [2022-07-19 18:03:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 18:03:37,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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 [2022-07-19 18:03:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:37,609 INFO L225 Difference]: With dead ends: 4418 [2022-07-19 18:03:37,609 INFO L226 Difference]: Without dead ends: 2952 [2022-07-19 18:03:37,612 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 [2022-07-19 18:03:37,612 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 494 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 18:03:37,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 139 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 18:03:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2022-07-19 18:03:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2950. [2022-07-19 18:03:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 1.4991522550016956) internal successors, (4421), 2949 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 4421 transitions. [2022-07-19 18:03:37,933 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 4421 transitions. Word has length 43 [2022-07-19 18:03:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:37,933 INFO L495 AbstractCegarLoop]: Abstraction has 2950 states and 4421 transitions. [2022-07-19 18:03:37,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 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) [2022-07-19 18:03:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 4421 transitions. [2022-07-19 18:03:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 18:03:37,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:37,934 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] [2022-07-19 18:03:37,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 18:03:37,935 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:37,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1723958080, now seen corresponding path program 1 times [2022-07-19 18:03:37,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:37,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47124313] [2022-07-19 18:03:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:37,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:38,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:38,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47124313] [2022-07-19 18:03:38,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47124313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:38,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:38,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 18:03:38,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210382106] [2022-07-19 18:03:38,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:38,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 18:03:38,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 18:03:38,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:03:38,004 INFO L87 Difference]: Start difference. First operand 2950 states and 4421 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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) [2022-07-19 18:03:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:38,721 INFO L93 Difference]: Finished difference Result 6072 states and 9014 transitions. [2022-07-19 18:03:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 18:03:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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 [2022-07-19 18:03:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:38,745 INFO L225 Difference]: With dead ends: 6072 [2022-07-19 18:03:38,745 INFO L226 Difference]: Without dead ends: 6070 [2022-07-19 18:03:38,746 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 [2022-07-19 18:03:38,747 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 184 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:03:38,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 571 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:03:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6070 states. [2022-07-19 18:03:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6070 to 3142. [2022-07-19 18:03:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.4686405603311048) internal successors, (4613), 3141 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4613 transitions. [2022-07-19 18:03:39,195 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4613 transitions. Word has length 43 [2022-07-19 18:03:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:39,195 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 4613 transitions. [2022-07-19 18:03:39,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 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) [2022-07-19 18:03:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4613 transitions. [2022-07-19 18:03:39,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 18:03:39,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:39,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:03:39,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 18:03:39,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:39,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1913665939, now seen corresponding path program 1 times [2022-07-19 18:03:39,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:39,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149353676] [2022-07-19 18:03:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:39,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:39,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:39,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149353676] [2022-07-19 18:03:39,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149353676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:39,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:39,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:03:39,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787519824] [2022-07-19 18:03:39,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:39,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:03:39,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:39,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:03:39,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:03:39,235 INFO L87 Difference]: Start difference. First operand 3142 states and 4613 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:39,721 INFO L93 Difference]: Finished difference Result 7604 states and 11171 transitions. [2022-07-19 18:03:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:03:39,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-07-19 18:03:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:39,742 INFO L225 Difference]: With dead ends: 7604 [2022-07-19 18:03:39,742 INFO L226 Difference]: Without dead ends: 4482 [2022-07-19 18:03:39,749 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 [2022-07-19 18:03:39,750 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 66 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:03:39,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 236 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:03:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2022-07-19 18:03:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 4480. [2022-07-19 18:03:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 1.4594775619557938) internal successors, (6537), 4479 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 6537 transitions. [2022-07-19 18:03:40,357 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 6537 transitions. Word has length 44 [2022-07-19 18:03:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:40,359 INFO L495 AbstractCegarLoop]: Abstraction has 4480 states and 6537 transitions. [2022-07-19 18:03:40,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 6537 transitions. [2022-07-19 18:03:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 18:03:40,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:40,363 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] [2022-07-19 18:03:40,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 18:03:40,365 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:40,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:40,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1827424966, now seen corresponding path program 1 times [2022-07-19 18:03:40,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:40,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224237824] [2022-07-19 18:03:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:40,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:40,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:40,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224237824] [2022-07-19 18:03:40,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224237824] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 18:03:40,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040636011] [2022-07-19 18:03:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:40,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 18:03:40,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 18:03:40,559 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) [2022-07-19 18:03:40,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 18:03:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:40,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 18:03:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 18:03:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 18:03:40,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 18:03:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 18:03:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040636011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 18:03:41,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 18:03:41,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 15 [2022-07-19 18:03:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077509046] [2022-07-19 18:03:41,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 18:03:41,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 18:03:41,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 18:03:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-19 18:03:41,095 INFO L87 Difference]: Start difference. First operand 4480 states and 6537 transitions. Second operand has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:49,945 INFO L93 Difference]: Finished difference Result 40883 states and 58845 transitions. [2022-07-19 18:03:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-07-19 18:03:49,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 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 [2022-07-19 18:03:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:50,067 INFO L225 Difference]: With dead ends: 40883 [2022-07-19 18:03:50,067 INFO L226 Difference]: Without dead ends: 36909 [2022-07-19 18:03:50,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9358 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3405, Invalid=18057, Unknown=0, NotChecked=0, Total=21462 [2022-07-19 18:03:50,097 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 6906 mSDsluCounter, 2166 mSDsCounter, 0 mSdLazyCounter, 2903 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6906 SdHoareTripleChecker+Valid, 2483 SdHoareTripleChecker+Invalid, 3128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:03:50,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6906 Valid, 2483 Invalid, 3128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2903 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-19 18:03:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36909 states. [2022-07-19 18:03:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36909 to 15628. [2022-07-19 18:03:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15628 states, 15627 states have (on average 1.4402636462532796) internal successors, (22507), 15627 states have internal predecessors, (22507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15628 states to 15628 states and 22507 transitions. [2022-07-19 18:03:52,025 INFO L78 Accepts]: Start accepts. Automaton has 15628 states and 22507 transitions. Word has length 61 [2022-07-19 18:03:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:52,026 INFO L495 AbstractCegarLoop]: Abstraction has 15628 states and 22507 transitions. [2022-07-19 18:03:52,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 15628 states and 22507 transitions. [2022-07-19 18:03:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 18:03:52,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:52,031 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] [2022-07-19 18:03:52,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 18:03:52,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 18:03:52,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash 621000165, now seen corresponding path program 1 times [2022-07-19 18:03:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:52,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549393785] [2022-07-19 18:03:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:52,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:52,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549393785] [2022-07-19 18:03:52,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549393785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:52,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:52,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:03:52,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395866691] [2022-07-19 18:03:52,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:52,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:03:52,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:52,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:03:52,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:03:52,309 INFO L87 Difference]: Start difference. First operand 15628 states and 22507 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:54,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:54,278 INFO L93 Difference]: Finished difference Result 25124 states and 35975 transitions. [2022-07-19 18:03:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:03:54,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2022-07-19 18:03:54,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:54,323 INFO L225 Difference]: With dead ends: 25124 [2022-07-19 18:03:54,324 INFO L226 Difference]: Without dead ends: 16161 [2022-07-19 18:03:54,344 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 [2022-07-19 18:03:54,345 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 67 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 265 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 [2022-07-19 18:03:54,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 265 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:03:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16161 states. [2022-07-19 18:03:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16161 to 15717. [2022-07-19 18:03:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15717 states, 15716 states have (on average 1.4122550267243574) internal successors, (22195), 15716 states have internal predecessors, (22195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15717 states to 15717 states and 22195 transitions. [2022-07-19 18:03:56,073 INFO L78 Accepts]: Start accepts. Automaton has 15717 states and 22195 transitions. Word has length 62 [2022-07-19 18:03:56,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:03:56,074 INFO L495 AbstractCegarLoop]: Abstraction has 15717 states and 22195 transitions. [2022-07-19 18:03:56,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 15717 states and 22195 transitions. [2022-07-19 18:03:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 18:03:56,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:03:56,078 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] [2022-07-19 18:03:56,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 18:03:56,079 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:03:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:03:56,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2941002, now seen corresponding path program 1 times [2022-07-19 18:03:56,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:03:56,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989657182] [2022-07-19 18:03:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:03:56,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:03:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:03:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:03:56,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:03:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989657182] [2022-07-19 18:03:56,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989657182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:03:56,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:03:56,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:03:56,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400734994] [2022-07-19 18:03:56,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:03:56,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:03:56,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:03:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:03:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:03:56,131 INFO L87 Difference]: Start difference. First operand 15717 states and 22195 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:03:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:03:58,900 INFO L93 Difference]: Finished difference Result 39144 states and 54917 transitions. [2022-07-19 18:03:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:03:58,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2022-07-19 18:03:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:03:58,959 INFO L225 Difference]: With dead ends: 39144 [2022-07-19 18:03:58,960 INFO L226 Difference]: Without dead ends: 26345 [2022-07-19 18:03:58,989 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 [2022-07-19 18:03:58,990 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 63 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 222 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 [2022-07-19 18:03:58,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 222 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:03:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26345 states. [2022-07-19 18:04:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26345 to 26294. [2022-07-19 18:04:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26294 states, 26293 states have (on average 1.3832198684060397) internal successors, (36369), 26293 states have internal predecessors, (36369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26294 states to 26294 states and 36369 transitions. [2022-07-19 18:04:01,989 INFO L78 Accepts]: Start accepts. Automaton has 26294 states and 36369 transitions. Word has length 62 [2022-07-19 18:04:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:04:01,989 INFO L495 AbstractCegarLoop]: Abstraction has 26294 states and 36369 transitions. [2022-07-19 18:04:01,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:01,990 INFO L276 IsEmpty]: Start isEmpty. Operand 26294 states and 36369 transitions. [2022-07-19 18:04:01,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 18:04:01,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:04:01,995 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] [2022-07-19 18:04:01,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 18:04:01,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:04:01,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:04:01,996 INFO L85 PathProgramCache]: Analyzing trace with hash 954450183, now seen corresponding path program 1 times [2022-07-19 18:04:01,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:04:01,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626396145] [2022-07-19 18:04:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:04:01,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:04:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:04:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:04:02,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:04:02,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626396145] [2022-07-19 18:04:02,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626396145] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:04:02,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:04:02,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:04:02,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77503808] [2022-07-19 18:04:02,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:04:02,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:04:02,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:04:02,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:04:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:04:02,039 INFO L87 Difference]: Start difference. First operand 26294 states and 36369 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:04:04,947 INFO L93 Difference]: Finished difference Result 53591 states and 73937 transitions. [2022-07-19 18:04:04,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:04:04,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2022-07-19 18:04:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:04:05,008 INFO L225 Difference]: With dead ends: 53591 [2022-07-19 18:04:05,008 INFO L226 Difference]: Without dead ends: 29492 [2022-07-19 18:04:05,052 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 [2022-07-19 18:04:05,053 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 64 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 266 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 [2022-07-19 18:04:05,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 266 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:04:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29492 states. [2022-07-19 18:04:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29492 to 26067. [2022-07-19 18:04:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26067 states, 26066 states have (on average 1.364881454768664) internal successors, (35577), 26066 states have internal predecessors, (35577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26067 states to 26067 states and 35577 transitions. [2022-07-19 18:04:08,304 INFO L78 Accepts]: Start accepts. Automaton has 26067 states and 35577 transitions. Word has length 62 [2022-07-19 18:04:08,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:04:08,305 INFO L495 AbstractCegarLoop]: Abstraction has 26067 states and 35577 transitions. [2022-07-19 18:04:08,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 26067 states and 35577 transitions. [2022-07-19 18:04:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 18:04:08,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:04:08,310 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] [2022-07-19 18:04:08,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 18:04:08,311 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:04:08,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:04:08,311 INFO L85 PathProgramCache]: Analyzing trace with hash -922232594, now seen corresponding path program 1 times [2022-07-19 18:04:08,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:04:08,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211961673] [2022-07-19 18:04:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:04:08,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:04:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:04:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 18:04:08,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:04:08,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211961673] [2022-07-19 18:04:08,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211961673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:04:08,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:04:08,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 18:04:08,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370342626] [2022-07-19 18:04:08,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:04:08,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 18:04:08,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:04:08,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 18:04:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:04:08,354 INFO L87 Difference]: Start difference. First operand 26067 states and 35577 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:04:12,559 INFO L93 Difference]: Finished difference Result 49877 states and 68699 transitions. [2022-07-19 18:04:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 18:04:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-19 18:04:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:04:12,618 INFO L225 Difference]: With dead ends: 49877 [2022-07-19 18:04:12,618 INFO L226 Difference]: Without dead ends: 42341 [2022-07-19 18:04:12,639 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 [2022-07-19 18:04:12,640 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 341 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 551 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 [2022-07-19 18:04:12,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 551 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:04:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42341 states. [2022-07-19 18:04:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42341 to 33261. [2022-07-19 18:04:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33261 states, 33260 states have (on average 1.3632591701743837) internal successors, (45342), 33260 states have internal predecessors, (45342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33261 states to 33261 states and 45342 transitions. [2022-07-19 18:04:16,098 INFO L78 Accepts]: Start accepts. Automaton has 33261 states and 45342 transitions. Word has length 62 [2022-07-19 18:04:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:04:16,099 INFO L495 AbstractCegarLoop]: Abstraction has 33261 states and 45342 transitions. [2022-07-19 18:04:16,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 33261 states and 45342 transitions. [2022-07-19 18:04:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 18:04:16,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:04:16,104 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] [2022-07-19 18:04:16,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 18:04:16,104 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:04:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:04:16,105 INFO L85 PathProgramCache]: Analyzing trace with hash -237073659, now seen corresponding path program 1 times [2022-07-19 18:04:16,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:04:16,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990047929] [2022-07-19 18:04:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:04:16,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:04:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:04:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 18:04:16,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:04:16,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990047929] [2022-07-19 18:04:16,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990047929] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:04:16,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:04:16,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 18:04:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648161018] [2022-07-19 18:04:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:04:16,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 18:04:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:04:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 18:04:16,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:04:16,152 INFO L87 Difference]: Start difference. First operand 33261 states and 45342 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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) [2022-07-19 18:04:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:04:20,893 INFO L93 Difference]: Finished difference Result 57850 states and 79500 transitions. [2022-07-19 18:04:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 18:04:20,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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 62 [2022-07-19 18:04:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:04:20,968 INFO L225 Difference]: With dead ends: 57850 [2022-07-19 18:04:20,968 INFO L226 Difference]: Without dead ends: 47596 [2022-07-19 18:04:20,989 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 [2022-07-19 18:04:20,990 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 336 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:04:20,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 577 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:04:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47596 states. [2022-07-19 18:04:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47596 to 41575. [2022-07-19 18:04:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41575 states, 41574 states have (on average 1.3585173425698753) internal successors, (56479), 41574 states have internal predecessors, (56479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41575 states to 41575 states and 56479 transitions. [2022-07-19 18:04:25,559 INFO L78 Accepts]: Start accepts. Automaton has 41575 states and 56479 transitions. Word has length 62 [2022-07-19 18:04:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:04:25,559 INFO L495 AbstractCegarLoop]: Abstraction has 41575 states and 56479 transitions. [2022-07-19 18:04:25,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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) [2022-07-19 18:04:25,559 INFO L276 IsEmpty]: Start isEmpty. Operand 41575 states and 56479 transitions. [2022-07-19 18:04:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 18:04:25,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:04:25,564 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] [2022-07-19 18:04:25,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 18:04:25,565 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:04:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:04:25,565 INFO L85 PathProgramCache]: Analyzing trace with hash 901849755, now seen corresponding path program 1 times [2022-07-19 18:04:25,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:04:25,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731809227] [2022-07-19 18:04:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:04:25,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:04:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:04:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 18:04:25,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:04:25,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731809227] [2022-07-19 18:04:25,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731809227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:04:25,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:04:25,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 18:04:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209546522] [2022-07-19 18:04:25,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:04:25,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 18:04:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:04:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 18:04:25,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 18:04:25,601 INFO L87 Difference]: Start difference. First operand 41575 states and 56479 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:04:30,025 INFO L93 Difference]: Finished difference Result 80049 states and 108817 transitions. [2022-07-19 18:04:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 18:04:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2022-07-19 18:04:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:04:30,080 INFO L225 Difference]: With dead ends: 80049 [2022-07-19 18:04:30,080 INFO L226 Difference]: Without dead ends: 38531 [2022-07-19 18:04:30,115 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 [2022-07-19 18:04:30,116 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 82 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:04:30,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 126 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:04:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38531 states. [2022-07-19 18:04:34,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38531 to 37056. [2022-07-19 18:04:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37056 states, 37055 states have (on average 1.3416273107542842) internal successors, (49714), 37055 states have internal predecessors, (49714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37056 states to 37056 states and 49714 transitions. [2022-07-19 18:04:34,113 INFO L78 Accepts]: Start accepts. Automaton has 37056 states and 49714 transitions. Word has length 63 [2022-07-19 18:04:34,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:04:34,113 INFO L495 AbstractCegarLoop]: Abstraction has 37056 states and 49714 transitions. [2022-07-19 18:04:34,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 37056 states and 49714 transitions. [2022-07-19 18:04:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 18:04:34,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:04:34,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 18:04:34,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 18:04:34,117 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:04:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:04:34,117 INFO L85 PathProgramCache]: Analyzing trace with hash -121604344, now seen corresponding path program 1 times [2022-07-19 18:04:34,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:04:34,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000560420] [2022-07-19 18:04:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:04:34,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:04:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:04:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 18:04:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:04:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000560420] [2022-07-19 18:04:34,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000560420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:04:34,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:04:34,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 18:04:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350659694] [2022-07-19 18:04:34,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:04:34,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 18:04:34,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:04:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 18:04:34,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:04:34,159 INFO L87 Difference]: Start difference. First operand 37056 states and 49714 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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) [2022-07-19 18:04:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:04:39,603 INFO L93 Difference]: Finished difference Result 61740 states and 83595 transitions. [2022-07-19 18:04:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 18:04:39,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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 63 [2022-07-19 18:04:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:04:39,690 INFO L225 Difference]: With dead ends: 61740 [2022-07-19 18:04:39,691 INFO L226 Difference]: Without dead ends: 51490 [2022-07-19 18:04:39,716 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 [2022-07-19 18:04:39,717 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 323 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 18:04:39,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 545 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 18:04:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51490 states. [2022-07-19 18:04:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51490 to 44872. [2022-07-19 18:04:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44872 states, 44871 states have (on average 1.3396848744177754) internal successors, (60113), 44871 states have internal predecessors, (60113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44872 states to 44872 states and 60113 transitions. [2022-07-19 18:04:44,944 INFO L78 Accepts]: Start accepts. Automaton has 44872 states and 60113 transitions. Word has length 63 [2022-07-19 18:04:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:04:44,945 INFO L495 AbstractCegarLoop]: Abstraction has 44872 states and 60113 transitions. [2022-07-19 18:04:44,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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) [2022-07-19 18:04:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 44872 states and 60113 transitions. [2022-07-19 18:04:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 18:04:44,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:04:44,949 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, 1, 1, 1] [2022-07-19 18:04:44,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 18:04:44,949 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:04:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:04:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 746654310, now seen corresponding path program 1 times [2022-07-19 18:04:44,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:04:44,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567961829] [2022-07-19 18:04:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:04:44,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:04:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:04:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 18:04:44,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:04:44,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567961829] [2022-07-19 18:04:44,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567961829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 18:04:44,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 18:04:44,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 18:04:44,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789127676] [2022-07-19 18:04:44,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 18:04:44,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 18:04:44,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:04:44,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 18:04:44,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 18:04:44,990 INFO L87 Difference]: Start difference. First operand 44872 states and 60113 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 18:04:51,627 INFO L93 Difference]: Finished difference Result 103538 states and 138449 transitions. [2022-07-19 18:04:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 18:04:51,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 67 [2022-07-19 18:04:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 18:04:51,722 INFO L225 Difference]: With dead ends: 103538 [2022-07-19 18:04:51,722 INFO L226 Difference]: Without dead ends: 58728 [2022-07-19 18:04:51,767 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 [2022-07-19 18:04:51,768 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 435 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 18:04:51,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 141 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 18:04:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58728 states. [2022-07-19 18:04:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58728 to 58142. [2022-07-19 18:04:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58142 states, 58141 states have (on average 1.3245042224935932) internal successors, (77008), 58141 states have internal predecessors, (77008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58142 states to 58142 states and 77008 transitions. [2022-07-19 18:04:58,992 INFO L78 Accepts]: Start accepts. Automaton has 58142 states and 77008 transitions. Word has length 67 [2022-07-19 18:04:58,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 18:04:58,992 INFO L495 AbstractCegarLoop]: Abstraction has 58142 states and 77008 transitions. [2022-07-19 18:04:58,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 18:04:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 58142 states and 77008 transitions. [2022-07-19 18:04:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 18:04:58,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 18:04:58,996 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, 1, 1, 1] [2022-07-19 18:04:58,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 18:04:58,997 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 18:04:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 18:04:58,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1698199029, now seen corresponding path program 1 times [2022-07-19 18:04:58,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 18:04:58,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986761516] [2022-07-19 18:04:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:04:58,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 18:04:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:04:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:04:59,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 18:04:59,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986761516] [2022-07-19 18:04:59,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986761516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 18:04:59,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922449517] [2022-07-19 18:04:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 18:04:59,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 18:04:59,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 18:04:59,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 18:04:59,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 18:04:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 18:04:59,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 18:04:59,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 18:04:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:04:59,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 18:04:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 18:04:59,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922449517] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 18:04:59,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 18:04:59,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-19 18:04:59,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783916427] [2022-07-19 18:04:59,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 18:04:59,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 18:04:59,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 18:04:59,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 18:04:59,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-19 18:04:59,428 INFO L87 Difference]: Start difference. First operand 58142 states and 77008 transitions. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)