./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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.8.1.ufo.BOUNDED-16.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 48c664e7cdd48f925f0c21709ed46b226b726e91974047076ebfec19f49c351c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:34:38,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:34:38,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:34:38,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:34:38,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:34:38,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:34:38,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:34:38,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:34:38,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:34:38,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:34:38,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:34:38,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:34:38,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:34:38,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:34:38,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:34:38,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:34:38,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:34:38,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:34:38,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:34:38,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:34:38,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:34:38,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:34:38,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:34:38,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:34:38,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:34:38,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:34:38,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:34:38,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:34:38,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:34:38,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:34:38,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:34:38,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:34:38,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:34:38,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:34:38,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:34:38,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:34:38,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:34:38,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:34:38,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:34:38,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:34:38,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:34:38,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:34:38,867 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:34:38,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:34:38,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:34:38,869 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:34:38,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:34:38,870 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:34:38,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:34:38,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:34:38,871 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:34:38,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:34:38,873 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:34:38,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:34:38,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:34:38,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:34:38,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:34:38,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:34:38,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:34:38,874 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:34:38,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:34:38,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:34:38,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:34:38,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:34:38,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:34:38,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:34:38,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:34:38,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:34:38,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:34:38,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:34:38,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:34:38,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:34:38,877 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:34:38,877 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:34:38,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:34:38,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48c664e7cdd48f925f0c21709ed46b226b726e91974047076ebfec19f49c351c [2021-12-28 01:34:39,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:34:39,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:34:39,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:34:39,217 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:34:39,218 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:34:39,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2021-12-28 01:34:39,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3df927633/405edd22ef95454aa5ef8a32d2ff3fb1/FLAGfb93486be [2021-12-28 01:34:39,696 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:34:39,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2021-12-28 01:34:39,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3df927633/405edd22ef95454aa5ef8a32d2ff3fb1/FLAGfb93486be [2021-12-28 01:34:40,064 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3df927633/405edd22ef95454aa5ef8a32d2ff3fb1 [2021-12-28 01:34:40,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:34:40,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:34:40,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:34:40,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:34:40,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:34:40,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c19b63f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40, skipping insertion in model container [2021-12-28 01:34:40,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:34:40,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:34:40,395 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.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c[8604,8617] [2021-12-28 01:34:40,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:34:40,465 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:34:40,523 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.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c[8604,8617] [2021-12-28 01:34:40,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:34:40,596 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:34:40,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40 WrapperNode [2021-12-28 01:34:40,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:34:40,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:34:40,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:34:40,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:34:40,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,659 INFO L137 Inliner]: procedures = 27, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 661 [2021-12-28 01:34:40,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:34:40,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:34:40,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:34:40,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:34:40,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:34:40,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:34:40,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:34:40,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:34:40,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (1/1) ... [2021-12-28 01:34:40,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:34:40,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:34:40,737 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) [2021-12-28 01:34:40,739 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 [2021-12-28 01:34:40,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:34:40,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:34:40,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:34:40,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:34:40,863 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:34:40,864 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:34:41,492 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:34:41,511 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:34:41,512 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 01:34:41,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:34:41 BoogieIcfgContainer [2021-12-28 01:34:41,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:34:41,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:34:41,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:34:41,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:34:41,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:34:40" (1/3) ... [2021-12-28 01:34:41,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a05f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:34:41, skipping insertion in model container [2021-12-28 01:34:41,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:34:40" (2/3) ... [2021-12-28 01:34:41,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a05f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:34:41, skipping insertion in model container [2021-12-28 01:34:41,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:34:41" (3/3) ... [2021-12-28 01:34:41,521 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+cfa-reducer.c [2021-12-28 01:34:41,526 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:34:41,526 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:34:41,571 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:34:41,576 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:34:41,577 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:34:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 155 states have (on average 1.761290322580645) internal successors, (273), 156 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-28 01:34:41,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:41,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:41,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:41,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1231322286, now seen corresponding path program 1 times [2021-12-28 01:34:41,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:41,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349632082] [2021-12-28 01:34:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:41,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:42,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:42,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349632082] [2021-12-28 01:34:42,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349632082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:42,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:42,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:42,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746961879] [2021-12-28 01:34:42,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:42,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:42,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:42,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:42,064 INFO L87 Difference]: Start difference. First operand has 157 states, 155 states have (on average 1.761290322580645) internal successors, (273), 156 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:42,156 INFO L93 Difference]: Finished difference Result 335 states and 554 transitions. [2021-12-28 01:34:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-12-28 01:34:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:42,173 INFO L225 Difference]: With dead ends: 335 [2021-12-28 01:34:42,174 INFO L226 Difference]: Without dead ends: 236 [2021-12-28 01:34:42,177 INFO L932 BasicCegarLoop]: 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 [2021-12-28 01:34:42,181 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 193 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 545 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 [2021-12-28 01:34:42,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 545 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-28 01:34:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-12-28 01:34:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.4377682403433476) internal successors, (335), 233 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 335 transitions. [2021-12-28 01:34:42,250 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 335 transitions. Word has length 101 [2021-12-28 01:34:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:42,250 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 335 transitions. [2021-12-28 01:34:42,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 335 transitions. [2021-12-28 01:34:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 01:34:42,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:42,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:42,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:34:42,258 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash -854475245, now seen corresponding path program 1 times [2021-12-28 01:34:42,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:42,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782098709] [2021-12-28 01:34:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:42,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:42,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:42,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782098709] [2021-12-28 01:34:42,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782098709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:42,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:42,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:42,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879457385] [2021-12-28 01:34:42,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:42,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:42,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:42,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:42,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:42,436 INFO L87 Difference]: Start difference. First operand 234 states and 335 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:42,478 INFO L93 Difference]: Finished difference Result 558 states and 851 transitions. [2021-12-28 01:34:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:42,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-28 01:34:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:42,481 INFO L225 Difference]: With dead ends: 558 [2021-12-28 01:34:42,481 INFO L226 Difference]: Without dead ends: 388 [2021-12-28 01:34:42,487 INFO L932 BasicCegarLoop]: 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 [2021-12-28 01:34:42,489 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 128 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 467 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 [2021-12-28 01:34:42,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 467 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-12-28 01:34:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 386. [2021-12-28 01:34:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.4987012987012986) internal successors, (577), 385 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 577 transitions. [2021-12-28 01:34:42,520 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 577 transitions. Word has length 102 [2021-12-28 01:34:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:42,520 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 577 transitions. [2021-12-28 01:34:42,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 577 transitions. [2021-12-28 01:34:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 01:34:42,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:42,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:42,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:34:42,522 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1444057759, now seen corresponding path program 1 times [2021-12-28 01:34:42,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:42,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972582535] [2021-12-28 01:34:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:42,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:42,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:42,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972582535] [2021-12-28 01:34:42,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972582535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:42,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:42,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:42,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779655317] [2021-12-28 01:34:42,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:42,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:42,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:42,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:42,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:42,595 INFO L87 Difference]: Start difference. First operand 386 states and 577 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:42,656 INFO L93 Difference]: Finished difference Result 998 states and 1551 transitions. [2021-12-28 01:34:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:42,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-28 01:34:42,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:42,660 INFO L225 Difference]: With dead ends: 998 [2021-12-28 01:34:42,660 INFO L226 Difference]: Without dead ends: 676 [2021-12-28 01:34:42,661 INFO L932 BasicCegarLoop]: 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 [2021-12-28 01:34:42,662 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 123 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 463 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 [2021-12-28 01:34:42,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 463 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-12-28 01:34:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 674. [2021-12-28 01:34:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 1.534918276374443) internal successors, (1033), 673 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1033 transitions. [2021-12-28 01:34:42,705 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1033 transitions. Word has length 103 [2021-12-28 01:34:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:42,706 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 1033 transitions. [2021-12-28 01:34:42,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1033 transitions. [2021-12-28 01:34:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-28 01:34:42,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:42,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:42,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:34:42,708 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1302443314, now seen corresponding path program 1 times [2021-12-28 01:34:42,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:42,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938826321] [2021-12-28 01:34:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:42,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:42,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:42,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938826321] [2021-12-28 01:34:42,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938826321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:42,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:42,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:42,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954287582] [2021-12-28 01:34:42,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:42,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:42,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:42,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:42,806 INFO L87 Difference]: Start difference. First operand 674 states and 1033 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:42,887 INFO L93 Difference]: Finished difference Result 1830 states and 2867 transitions. [2021-12-28 01:34:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-12-28 01:34:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:42,895 INFO L225 Difference]: With dead ends: 1830 [2021-12-28 01:34:42,895 INFO L226 Difference]: Without dead ends: 1220 [2021-12-28 01:34:42,896 INFO L932 BasicCegarLoop]: 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 [2021-12-28 01:34:42,905 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 118 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 459 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 [2021-12-28 01:34:42,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 459 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-12-28 01:34:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1218. [2021-12-28 01:34:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.552177485620378) internal successors, (1889), 1217 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1889 transitions. [2021-12-28 01:34:42,975 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1889 transitions. Word has length 104 [2021-12-28 01:34:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:42,977 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1889 transitions. [2021-12-28 01:34:42,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1889 transitions. [2021-12-28 01:34:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-28 01:34:42,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:42,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:42,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:34:42,978 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash 342678280, now seen corresponding path program 1 times [2021-12-28 01:34:42,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:42,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992125516] [2021-12-28 01:34:42,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:42,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:43,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:43,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992125516] [2021-12-28 01:34:43,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992125516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:43,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:43,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:43,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998204805] [2021-12-28 01:34:43,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:43,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:43,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:43,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:43,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:43,100 INFO L87 Difference]: Start difference. First operand 1218 states and 1889 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:43,224 INFO L93 Difference]: Finished difference Result 3398 states and 5331 transitions. [2021-12-28 01:34:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:43,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-28 01:34:43,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:43,254 INFO L225 Difference]: With dead ends: 3398 [2021-12-28 01:34:43,254 INFO L226 Difference]: Without dead ends: 2244 [2021-12-28 01:34:43,256 INFO L932 BasicCegarLoop]: 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 [2021-12-28 01:34:43,257 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 113 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 455 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 [2021-12-28 01:34:43,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 455 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-12-28 01:34:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2242. [2021-12-28 01:34:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 1.5568942436412316) internal successors, (3489), 2241 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3489 transitions. [2021-12-28 01:34:43,387 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3489 transitions. Word has length 105 [2021-12-28 01:34:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:43,388 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3489 transitions. [2021-12-28 01:34:43,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3489 transitions. [2021-12-28 01:34:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-28 01:34:43,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:43,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:43,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:34:43,393 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash 504937094, now seen corresponding path program 1 times [2021-12-28 01:34:43,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:43,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659964087] [2021-12-28 01:34:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:43,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:43,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:43,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659964087] [2021-12-28 01:34:43,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659964087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:43,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:43,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:43,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712172278] [2021-12-28 01:34:43,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:43,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:43,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:43,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:43,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:43,476 INFO L87 Difference]: Start difference. First operand 2242 states and 3489 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:43,697 INFO L93 Difference]: Finished difference Result 6342 states and 9923 transitions. [2021-12-28 01:34:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:43,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-28 01:34:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:43,726 INFO L225 Difference]: With dead ends: 6342 [2021-12-28 01:34:43,727 INFO L226 Difference]: Without dead ends: 4164 [2021-12-28 01:34:43,732 INFO L932 BasicCegarLoop]: 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 [2021-12-28 01:34:43,733 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 108 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 451 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 [2021-12-28 01:34:43,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 451 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-12-28 01:34:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 4162. [2021-12-28 01:34:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 4161 states have (on average 1.5537130497476568) internal successors, (6465), 4161 states have internal predecessors, (6465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 6465 transitions. [2021-12-28 01:34:43,962 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 6465 transitions. Word has length 106 [2021-12-28 01:34:43,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:43,963 INFO L470 AbstractCegarLoop]: Abstraction has 4162 states and 6465 transitions. [2021-12-28 01:34:43,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 6465 transitions. [2021-12-28 01:34:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-28 01:34:43,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:43,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:43,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:34:43,966 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:43,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash -37721726, now seen corresponding path program 1 times [2021-12-28 01:34:43,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:43,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547561676] [2021-12-28 01:34:43,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:43,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:44,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:44,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547561676] [2021-12-28 01:34:44,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547561676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:44,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:44,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:44,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034984682] [2021-12-28 01:34:44,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:44,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:44,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:44,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:44,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:44,078 INFO L87 Difference]: Start difference. First operand 4162 states and 6465 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:44,470 INFO L93 Difference]: Finished difference Result 11846 states and 18435 transitions. [2021-12-28 01:34:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2021-12-28 01:34:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:44,500 INFO L225 Difference]: With dead ends: 11846 [2021-12-28 01:34:44,500 INFO L226 Difference]: Without dead ends: 7748 [2021-12-28 01:34:44,506 INFO L932 BasicCegarLoop]: 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 [2021-12-28 01:34:44,508 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 103 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 447 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 [2021-12-28 01:34:44,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 447 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7748 states. [2021-12-28 01:34:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7748 to 7746. [2021-12-28 01:34:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7746 states, 7745 states have (on average 1.5453841187863138) internal successors, (11969), 7745 states have internal predecessors, (11969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 11969 transitions. [2021-12-28 01:34:45,043 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 11969 transitions. Word has length 107 [2021-12-28 01:34:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:45,043 INFO L470 AbstractCegarLoop]: Abstraction has 7746 states and 11969 transitions. [2021-12-28 01:34:45,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 11969 transitions. [2021-12-28 01:34:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-28 01:34:45,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:45,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:45,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:34:45,045 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1757696618, now seen corresponding path program 1 times [2021-12-28 01:34:45,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:45,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367782296] [2021-12-28 01:34:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:45,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:45,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:45,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367782296] [2021-12-28 01:34:45,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367782296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:45,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:45,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:34:45,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732831199] [2021-12-28 01:34:45,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:45,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:34:45,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:34:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:34:45,116 INFO L87 Difference]: Start difference. First operand 7746 states and 11969 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:45,787 INFO L93 Difference]: Finished difference Result 22086 states and 34115 transitions. [2021-12-28 01:34:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:34:45,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-28 01:34:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:45,854 INFO L225 Difference]: With dead ends: 22086 [2021-12-28 01:34:45,854 INFO L226 Difference]: Without dead ends: 14404 [2021-12-28 01:34:45,869 INFO L932 BasicCegarLoop]: 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 [2021-12-28 01:34:45,870 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 98 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 443 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 [2021-12-28 01:34:45,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 443 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:34:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14404 states. [2021-12-28 01:34:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14404 to 14402. [2021-12-28 01:34:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 1.5332962988681342) internal successors, (22081), 14401 states have internal predecessors, (22081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 22081 transitions. [2021-12-28 01:34:46,884 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 22081 transitions. Word has length 108 [2021-12-28 01:34:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:46,884 INFO L470 AbstractCegarLoop]: Abstraction has 14402 states and 22081 transitions. [2021-12-28 01:34:46,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 22081 transitions. [2021-12-28 01:34:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-28 01:34:46,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:46,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:34:46,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:34:46,886 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:46,887 INFO L85 PathProgramCache]: Analyzing trace with hash -42081324, now seen corresponding path program 1 times [2021-12-28 01:34:46,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:46,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100163330] [2021-12-28 01:34:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:46,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:34:47,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:47,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100163330] [2021-12-28 01:34:47,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100163330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:47,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:47,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 01:34:47,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831523136] [2021-12-28 01:34:47,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:47,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:34:47,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:34:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:34:47,028 INFO L87 Difference]: Start difference. First operand 14402 states and 22081 transitions. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:35:00,603 INFO L93 Difference]: Finished difference Result 243810 states and 374353 transitions. [2021-12-28 01:35:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 01:35:00,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-12-28 01:35:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:35:01,340 INFO L225 Difference]: With dead ends: 243810 [2021-12-28 01:35:01,340 INFO L226 Difference]: Without dead ends: 229472 [2021-12-28 01:35:01,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-12-28 01:35:01,442 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 2802 mSDsluCounter, 5143 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2802 SdHoareTripleChecker+Valid, 5344 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:35:01,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2802 Valid, 5344 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:35:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229472 states. [2021-12-28 01:35:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229472 to 28738. [2021-12-28 01:35:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28738 states, 28737 states have (on average 1.516685805755646) internal successors, (43585), 28737 states have internal predecessors, (43585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28738 states to 28738 states and 43585 transitions. [2021-12-28 01:35:06,463 INFO L78 Accepts]: Start accepts. Automaton has 28738 states and 43585 transitions. Word has length 109 [2021-12-28 01:35:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:35:06,464 INFO L470 AbstractCegarLoop]: Abstraction has 28738 states and 43585 transitions. [2021-12-28 01:35:06,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 28738 states and 43585 transitions. [2021-12-28 01:35:06,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:35:06,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:35:06,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:35:06,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:35:06,466 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:35:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:35:06,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1608706447, now seen corresponding path program 1 times [2021-12-28 01:35:06,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:35:06,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649244341] [2021-12-28 01:35:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:35:06,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:35:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:35:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:35:06,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:35:06,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649244341] [2021-12-28 01:35:06,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649244341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:35:06,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:35:06,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 01:35:06,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715170144] [2021-12-28 01:35:06,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:35:06,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:35:06,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:35:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:35:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:35:06,832 INFO L87 Difference]: Start difference. First operand 28738 states and 43585 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:35:10,499 INFO L93 Difference]: Finished difference Result 57414 states and 87107 transitions. [2021-12-28 01:35:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:35:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-28 01:35:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:35:10,545 INFO L225 Difference]: With dead ends: 57414 [2021-12-28 01:35:10,546 INFO L226 Difference]: Without dead ends: 28740 [2021-12-28 01:35:10,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:35:10,576 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 787 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:35:10,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 1180 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:35:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28740 states. [2021-12-28 01:35:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28740 to 28738. [2021-12-28 01:35:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28738 states, 28737 states have (on average 1.5077774297943418) internal successors, (43329), 28737 states have internal predecessors, (43329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28738 states to 28738 states and 43329 transitions. [2021-12-28 01:35:13,927 INFO L78 Accepts]: Start accepts. Automaton has 28738 states and 43329 transitions. Word has length 111 [2021-12-28 01:35:13,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:35:13,927 INFO L470 AbstractCegarLoop]: Abstraction has 28738 states and 43329 transitions. [2021-12-28 01:35:13,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:13,928 INFO L276 IsEmpty]: Start isEmpty. Operand 28738 states and 43329 transitions. [2021-12-28 01:35:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 01:35:13,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:35:13,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:35:13,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:35:13,930 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:35:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:35:13,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1587703792, now seen corresponding path program 1 times [2021-12-28 01:35:13,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:35:13,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17776381] [2021-12-28 01:35:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:35:13,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:35:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:35:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:35:13,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:35:13,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17776381] [2021-12-28 01:35:13,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17776381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:35:13,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:35:13,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:35:13,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629008429] [2021-12-28 01:35:13,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:35:13,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:35:13,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:35:13,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:35:13,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:35:13,983 INFO L87 Difference]: Start difference. First operand 28738 states and 43329 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:35:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:35:18,484 INFO L93 Difference]: Finished difference Result 71368 states and 107589 transitions. [2021-12-28 01:35:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:35:18,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-28 01:35:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:35:18,550 INFO L225 Difference]: With dead ends: 71368 [2021-12-28 01:35:18,550 INFO L226 Difference]: Without dead ends: 42694 [2021-12-28 01:35:18,575 INFO L932 BasicCegarLoop]: 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 [2021-12-28 01:35:18,575 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 89 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:35:18,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 400 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:35:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42694 states.