./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 065397af3cd6d10649fc8ba37687b2a2b7dcb462be78997de981751c3e212e90 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:12:01,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:12:01,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:12:01,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:12:01,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:12:01,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:12:01,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:12:01,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:12:01,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:12:01,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:12:01,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:12:01,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:12:01,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:12:01,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:12:01,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:12:01,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:12:01,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:12:01,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:12:01,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:12:01,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:12:01,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:12:01,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:12:01,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:12:01,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:12:01,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:12:01,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:12:01,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:12:01,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:12:01,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:12:01,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:12:01,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:12:01,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:12:01,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:12:01,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:12:01,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:12:01,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:12:01,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:12:01,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:12:01,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:12:01,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:12:01,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:12:01,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:12:01,832 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:12:01,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:12:01,834 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:12:01,834 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:12:01,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:12:01,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:12:01,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:12:01,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:12:01,836 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:12:01,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:12:01,837 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:12:01,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:12:01,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:12:01,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:12:01,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:12:01,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:12:01,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:12:01,838 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:12:01,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:12:01,838 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:12:01,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:12:01,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:12:01,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:12:01,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:12:01,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:12:01,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:12:01,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:12:01,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:12:01,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:12:01,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:12:01,840 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:12:01,841 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:12:01,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:12:01,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:12:01,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 065397af3cd6d10649fc8ba37687b2a2b7dcb462be78997de981751c3e212e90 [2021-12-14 15:12:02,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:12:02,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:12:02,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:12:02,029 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:12:02,029 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:12:02,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-14 15:12:02,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49703390f/aaa9a89b06d447bd88b82bfc999a7c33/FLAG10625a5f3 [2021-12-14 15:12:02,481 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:12:02,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-14 15:12:02,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49703390f/aaa9a89b06d447bd88b82bfc999a7c33/FLAG10625a5f3 [2021-12-14 15:12:02,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49703390f/aaa9a89b06d447bd88b82bfc999a7c33 [2021-12-14 15:12:02,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:12:02,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:12:02,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:12:02,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:12:02,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:12:02,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e26da2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02, skipping insertion in model container [2021-12-14 15:12:02,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:12:02,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:12:02,674 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5339,5352] [2021-12-14 15:12:02,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:12:02,696 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:12:02,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5339,5352] [2021-12-14 15:12:02,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:12:02,762 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:12:02,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02 WrapperNode [2021-12-14 15:12:02,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:12:02,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:12:02,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:12:02,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:12:02,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,797 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 427 [2021-12-14 15:12:02,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:12:02,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:12:02,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:12:02,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:12:02,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:12:02,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:12:02,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:12:02,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:12:02,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (1/1) ... [2021-12-14 15:12:02,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:12:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:12:02,861 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) [2021-12-14 15:12:02,872 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 [2021-12-14 15:12:02,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:12:02,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:12:02,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:12:02,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:12:02,969 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:12:02,971 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:12:03,238 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:12:03,243 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:12:03,243 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 15:12:03,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:12:03 BoogieIcfgContainer [2021-12-14 15:12:03,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:12:03,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:12:03,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:12:03,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:12:03,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:12:02" (1/3) ... [2021-12-14 15:12:03,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579f3cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:12:03, skipping insertion in model container [2021-12-14 15:12:03,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:02" (2/3) ... [2021-12-14 15:12:03,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579f3cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:12:03, skipping insertion in model container [2021-12-14 15:12:03,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:12:03" (3/3) ... [2021-12-14 15:12:03,250 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-12-14 15:12:03,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:12:03,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 15:12:03,281 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:12:03,285 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 [2021-12-14 15:12:03,285 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 15:12:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 1.6944444444444444) internal successors, (183), 109 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 15:12:03,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:03,303 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] [2021-12-14 15:12:03,304 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:03,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1289871298, now seen corresponding path program 1 times [2021-12-14 15:12:03,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:03,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460389048] [2021-12-14 15:12:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:03,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:03,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:03,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460389048] [2021-12-14 15:12:03,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460389048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:03,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:03,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:03,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465670201] [2021-12-14 15:12:03,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:03,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:03,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:03,587 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 1.6944444444444444) internal successors, (183), 109 states have internal predecessors, (183), 0 states have call successors, (0), 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 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:03,662 INFO L93 Difference]: Finished difference Result 260 states and 419 transitions. [2021-12-14 15:12:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-12-14 15:12:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:03,680 INFO L225 Difference]: With dead ends: 260 [2021-12-14 15:12:03,681 INFO L226 Difference]: Without dead ends: 171 [2021-12-14 15:12:03,687 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 [2021-12-14 15:12:03,691 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 137 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 401 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 [2021-12-14 15:12:03,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 401 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-14 15:12:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-12-14 15:12:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.505952380952381) internal successors, (253), 168 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 253 transitions. [2021-12-14 15:12:03,742 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 253 transitions. Word has length 48 [2021-12-14 15:12:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:03,742 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 253 transitions. [2021-12-14 15:12:03,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 253 transitions. [2021-12-14 15:12:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 15:12:03,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:03,745 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] [2021-12-14 15:12:03,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:12:03,746 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:03,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1971653998, now seen corresponding path program 1 times [2021-12-14 15:12:03,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:03,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845782855] [2021-12-14 15:12:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:03,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:03,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:03,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845782855] [2021-12-14 15:12:03,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845782855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:03,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:03,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:03,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181159685] [2021-12-14 15:12:03,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:03,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:03,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:03,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:03,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:03,835 INFO L87 Difference]: Start difference. First operand 169 states and 253 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:03,868 INFO L93 Difference]: Finished difference Result 421 states and 653 transitions. [2021-12-14 15:12:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-12-14 15:12:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:03,873 INFO L225 Difference]: With dead ends: 421 [2021-12-14 15:12:03,873 INFO L226 Difference]: Without dead ends: 279 [2021-12-14 15:12:03,876 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 [2021-12-14 15:12:03,877 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 110 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 348 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 [2021-12-14 15:12:03,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 348 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:03,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-14 15:12:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2021-12-14 15:12:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.536231884057971) internal successors, (424), 276 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 424 transitions. [2021-12-14 15:12:03,904 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 424 transitions. Word has length 49 [2021-12-14 15:12:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:03,905 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 424 transitions. [2021-12-14 15:12:03,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 424 transitions. [2021-12-14 15:12:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 15:12:03,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:03,910 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] [2021-12-14 15:12:03,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:12:03,912 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash 663495285, now seen corresponding path program 1 times [2021-12-14 15:12:03,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:03,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711747374] [2021-12-14 15:12:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:03,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:03,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:03,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711747374] [2021-12-14 15:12:03,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711747374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:03,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:03,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:03,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142324510] [2021-12-14 15:12:03,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:03,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:03,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:03,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:03,997 INFO L87 Difference]: Start difference. First operand 277 states and 424 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:04,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:04,030 INFO L93 Difference]: Finished difference Result 713 states and 1114 transitions. [2021-12-14 15:12:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:04,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-12-14 15:12:04,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:04,041 INFO L225 Difference]: With dead ends: 713 [2021-12-14 15:12:04,042 INFO L226 Difference]: Without dead ends: 463 [2021-12-14 15:12:04,043 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 [2021-12-14 15:12:04,045 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 105 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 333 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 [2021-12-14 15:12:04,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 333 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-14 15:12:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2021-12-14 15:12:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.5478260869565217) internal successors, (712), 460 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 712 transitions. [2021-12-14 15:12:04,078 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 712 transitions. Word has length 50 [2021-12-14 15:12:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:04,078 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 712 transitions. [2021-12-14 15:12:04,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 712 transitions. [2021-12-14 15:12:04,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 15:12:04,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:04,079 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] [2021-12-14 15:12:04,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:12:04,079 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:04,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1706895887, now seen corresponding path program 1 times [2021-12-14 15:12:04,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:04,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704328395] [2021-12-14 15:12:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:04,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:04,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:04,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704328395] [2021-12-14 15:12:04,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704328395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:04,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:04,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:04,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611811111] [2021-12-14 15:12:04,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:04,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:04,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:04,128 INFO L87 Difference]: Start difference. First operand 461 states and 712 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:04,160 INFO L93 Difference]: Finished difference Result 1201 states and 1874 transitions. [2021-12-14 15:12:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-14 15:12:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:04,164 INFO L225 Difference]: With dead ends: 1201 [2021-12-14 15:12:04,165 INFO L226 Difference]: Without dead ends: 767 [2021-12-14 15:12:04,174 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 [2021-12-14 15:12:04,182 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 100 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 318 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 [2021-12-14 15:12:04,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 318 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-14 15:12:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 765. [2021-12-14 15:12:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 1.544502617801047) internal successors, (1180), 764 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1180 transitions. [2021-12-14 15:12:04,227 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1180 transitions. Word has length 51 [2021-12-14 15:12:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:04,228 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1180 transitions. [2021-12-14 15:12:04,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1180 transitions. [2021-12-14 15:12:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-14 15:12:04,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:04,229 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] [2021-12-14 15:12:04,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:12:04,230 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1133800764, now seen corresponding path program 1 times [2021-12-14 15:12:04,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:04,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429400158] [2021-12-14 15:12:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:04,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:04,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:04,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429400158] [2021-12-14 15:12:04,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429400158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:04,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:04,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:12:04,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520423427] [2021-12-14 15:12:04,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:04,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:12:04,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:12:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:12:04,324 INFO L87 Difference]: Start difference. First operand 765 states and 1180 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:04,481 INFO L93 Difference]: Finished difference Result 4455 states and 6945 transitions. [2021-12-14 15:12:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:12:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-14 15:12:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:04,498 INFO L225 Difference]: With dead ends: 4455 [2021-12-14 15:12:04,499 INFO L226 Difference]: Without dead ends: 3717 [2021-12-14 15:12:04,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:12:04,501 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 904 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:04,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 1080 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3717 states. [2021-12-14 15:12:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3717 to 1501. [2021-12-14 15:12:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 1.5333333333333334) internal successors, (2300), 1500 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2300 transitions. [2021-12-14 15:12:04,583 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2300 transitions. Word has length 52 [2021-12-14 15:12:04,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:04,584 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 2300 transitions. [2021-12-14 15:12:04,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2300 transitions. [2021-12-14 15:12:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 15:12:04,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:04,589 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] [2021-12-14 15:12:04,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:12:04,590 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:04,590 INFO L85 PathProgramCache]: Analyzing trace with hash 768629036, now seen corresponding path program 1 times [2021-12-14 15:12:04,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:04,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228464878] [2021-12-14 15:12:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:04,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:04,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:04,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228464878] [2021-12-14 15:12:04,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228464878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:04,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:04,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:12:04,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078265131] [2021-12-14 15:12:04,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:04,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:12:04,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:04,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:12:04,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:12:04,667 INFO L87 Difference]: Start difference. First operand 1501 states and 2300 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:04,939 INFO L93 Difference]: Finished difference Result 6501 states and 9920 transitions. [2021-12-14 15:12:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:12:04,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-14 15:12:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:04,953 INFO L225 Difference]: With dead ends: 6501 [2021-12-14 15:12:04,953 INFO L226 Difference]: Without dead ends: 5027 [2021-12-14 15:12:04,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:12:04,957 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 442 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:04,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 833 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:12:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2021-12-14 15:12:05,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 5021. [2021-12-14 15:12:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5021 states, 5020 states have (on average 1.5163346613545816) internal successors, (7612), 5020 states have internal predecessors, (7612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5021 states to 5021 states and 7612 transitions. [2021-12-14 15:12:05,170 INFO L78 Accepts]: Start accepts. Automaton has 5021 states and 7612 transitions. Word has length 53 [2021-12-14 15:12:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:05,170 INFO L470 AbstractCegarLoop]: Abstraction has 5021 states and 7612 transitions. [2021-12-14 15:12:05,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 5021 states and 7612 transitions. [2021-12-14 15:12:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 15:12:05,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:05,171 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] [2021-12-14 15:12:05,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:12:05,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:05,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1792030237, now seen corresponding path program 1 times [2021-12-14 15:12:05,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:05,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197131499] [2021-12-14 15:12:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:05,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:05,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:05,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197131499] [2021-12-14 15:12:05,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197131499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:05,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:05,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:12:05,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526744323] [2021-12-14 15:12:05,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:05,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:12:05,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:05,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:12:05,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:12:05,237 INFO L87 Difference]: Start difference. First operand 5021 states and 7612 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:05,697 INFO L93 Difference]: Finished difference Result 15009 states and 22782 transitions. [2021-12-14 15:12:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:12:05,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-14 15:12:05,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:05,726 INFO L225 Difference]: With dead ends: 15009 [2021-12-14 15:12:05,726 INFO L226 Difference]: Without dead ends: 10015 [2021-12-14 15:12:05,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:12:05,733 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 663 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:05,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 171 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:12:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10015 states. [2021-12-14 15:12:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10015 to 10013. [2021-12-14 15:12:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10013 states, 10012 states have (on average 1.5065920894926088) internal successors, (15084), 10012 states have internal predecessors, (15084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10013 states to 10013 states and 15084 transitions. [2021-12-14 15:12:06,192 INFO L78 Accepts]: Start accepts. Automaton has 10013 states and 15084 transitions. Word has length 55 [2021-12-14 15:12:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:06,193 INFO L470 AbstractCegarLoop]: Abstraction has 10013 states and 15084 transitions. [2021-12-14 15:12:06,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 10013 states and 15084 transitions. [2021-12-14 15:12:06,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-14 15:12:06,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:06,194 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] [2021-12-14 15:12:06,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:12:06,194 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:06,195 INFO L85 PathProgramCache]: Analyzing trace with hash -22058530, now seen corresponding path program 1 times [2021-12-14 15:12:06,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:06,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371988046] [2021-12-14 15:12:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:06,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:06,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:06,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371988046] [2021-12-14 15:12:06,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371988046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:06,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:06,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:12:06,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423415912] [2021-12-14 15:12:06,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:06,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:12:06,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:06,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:12:06,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:12:06,278 INFO L87 Difference]: Start difference. First operand 10013 states and 15084 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:07,155 INFO L93 Difference]: Finished difference Result 20511 states and 30653 transitions. [2021-12-14 15:12:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:12:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-14 15:12:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:07,227 INFO L225 Difference]: With dead ends: 20511 [2021-12-14 15:12:07,227 INFO L226 Difference]: Without dead ends: 20509 [2021-12-14 15:12:07,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:12:07,239 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 242 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:07,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 753 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20509 states. [2021-12-14 15:12:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20509 to 10525. [2021-12-14 15:12:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10525 states, 10524 states have (on average 1.4819460281261878) internal successors, (15596), 10524 states have internal predecessors, (15596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10525 states to 10525 states and 15596 transitions. [2021-12-14 15:12:07,875 INFO L78 Accepts]: Start accepts. Automaton has 10525 states and 15596 transitions. Word has length 55 [2021-12-14 15:12:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:07,875 INFO L470 AbstractCegarLoop]: Abstraction has 10525 states and 15596 transitions. [2021-12-14 15:12:07,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10525 states and 15596 transitions. [2021-12-14 15:12:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 15:12:07,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:07,876 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] [2021-12-14 15:12:07,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:12:07,878 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:07,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:07,878 INFO L85 PathProgramCache]: Analyzing trace with hash -673241382, now seen corresponding path program 1 times [2021-12-14 15:12:07,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:07,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156815717] [2021-12-14 15:12:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:07,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:07,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:07,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156815717] [2021-12-14 15:12:07,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156815717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:07,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:07,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:07,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358536484] [2021-12-14 15:12:07,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:07,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:07,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:07,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:07,919 INFO L87 Difference]: Start difference. First operand 10525 states and 15596 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:08,384 INFO L93 Difference]: Finished difference Result 23387 states and 34588 transitions. [2021-12-14 15:12:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:08,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-14 15:12:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:08,411 INFO L225 Difference]: With dead ends: 23387 [2021-12-14 15:12:08,411 INFO L226 Difference]: Without dead ends: 12889 [2021-12-14 15:12:08,422 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 [2021-12-14 15:12:08,422 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 88 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:08,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 309 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12889 states. [2021-12-14 15:12:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12889 to 12887. [2021-12-14 15:12:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12887 states, 12886 states have (on average 1.4715194785038026) internal successors, (18962), 12886 states have internal predecessors, (18962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12887 states to 12887 states and 18962 transitions. [2021-12-14 15:12:09,055 INFO L78 Accepts]: Start accepts. Automaton has 12887 states and 18962 transitions. Word has length 56 [2021-12-14 15:12:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:09,056 INFO L470 AbstractCegarLoop]: Abstraction has 12887 states and 18962 transitions. [2021-12-14 15:12:09,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:09,056 INFO L276 IsEmpty]: Start isEmpty. Operand 12887 states and 18962 transitions. [2021-12-14 15:12:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 15:12:09,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:09,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:12:09,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:12:09,062 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1821600213, now seen corresponding path program 1 times [2021-12-14 15:12:09,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:09,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222305102] [2021-12-14 15:12:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:09,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:12:09,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222305102] [2021-12-14 15:12:09,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222305102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:12:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555604032] [2021-12-14 15:12:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:09,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:12:09,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:12:09,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:12:09,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 15:12:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:09,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 15:12:09,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:12:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:12:09,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:12:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:12:09,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555604032] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:12:09,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 15:12:09,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2021-12-14 15:12:09,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379399643] [2021-12-14 15:12:09,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 15:12:09,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 15:12:09,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:09,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 15:12:09,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-14 15:12:09,760 INFO L87 Difference]: Start difference. First operand 12887 states and 18962 transitions. Second operand has 10 states, 10 states have (on average 19.9) internal successors, (199), 10 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:11,265 INFO L93 Difference]: Finished difference Result 43277 states and 63950 transitions. [2021-12-14 15:12:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:12:11,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.9) internal successors, (199), 10 states have internal predecessors, (199), 0 states have call successors, (0), 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 77 [2021-12-14 15:12:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:11,333 INFO L225 Difference]: With dead ends: 43277 [2021-12-14 15:12:11,333 INFO L226 Difference]: Without dead ends: 32779 [2021-12-14 15:12:11,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:12:11,348 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 910 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:11,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 1129 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:12:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32779 states. [2021-12-14 15:12:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32779 to 31743. [2021-12-14 15:12:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31743 states, 31742 states have (on average 1.461344590763027) internal successors, (46386), 31742 states have internal predecessors, (46386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31743 states to 31743 states and 46386 transitions. [2021-12-14 15:12:12,773 INFO L78 Accepts]: Start accepts. Automaton has 31743 states and 46386 transitions. Word has length 77 [2021-12-14 15:12:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:12,773 INFO L470 AbstractCegarLoop]: Abstraction has 31743 states and 46386 transitions. [2021-12-14 15:12:12,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.9) internal successors, (199), 10 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 31743 states and 46386 transitions. [2021-12-14 15:12:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 15:12:12,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:12,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:12:12,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 15:12:12,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 15:12:12,996 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:12,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:12,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1365606455, now seen corresponding path program 1 times [2021-12-14 15:12:12,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:12,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343306829] [2021-12-14 15:12:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:12,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:13,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:13,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343306829] [2021-12-14 15:12:13,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343306829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:13,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:13,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:13,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637585344] [2021-12-14 15:12:13,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:13,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:13,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:13,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:13,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:13,023 INFO L87 Difference]: Start difference. First operand 31743 states and 46386 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:15,239 INFO L93 Difference]: Finished difference Result 75584 states and 110252 transitions. [2021-12-14 15:12:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:15,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-14 15:12:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:15,332 INFO L225 Difference]: With dead ends: 75584 [2021-12-14 15:12:15,333 INFO L226 Difference]: Without dead ends: 50166 [2021-12-14 15:12:15,371 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 [2021-12-14 15:12:15,372 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 90 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:15,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 311 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50166 states. [2021-12-14 15:12:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50166 to 48020. [2021-12-14 15:12:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48020 states, 48019 states have (on average 1.4440117453507986) internal successors, (69340), 48019 states have internal predecessors, (69340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48020 states to 48020 states and 69340 transitions. [2021-12-14 15:12:17,690 INFO L78 Accepts]: Start accepts. Automaton has 48020 states and 69340 transitions. Word has length 78 [2021-12-14 15:12:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:17,690 INFO L470 AbstractCegarLoop]: Abstraction has 48020 states and 69340 transitions. [2021-12-14 15:12:17,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 48020 states and 69340 transitions. [2021-12-14 15:12:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 15:12:17,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:17,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:12:17,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:12:17,704 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1977851660, now seen corresponding path program 1 times [2021-12-14 15:12:17,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:17,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780335733] [2021-12-14 15:12:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:17,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:17,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:17,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780335733] [2021-12-14 15:12:17,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780335733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:17,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:17,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:17,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198455218] [2021-12-14 15:12:17,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:17,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:17,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:17,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:17,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:17,735 INFO L87 Difference]: Start difference. First operand 48020 states and 69340 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:20,779 INFO L93 Difference]: Finished difference Result 101070 states and 145289 transitions. [2021-12-14 15:12:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:20,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-14 15:12:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:20,917 INFO L225 Difference]: With dead ends: 101070 [2021-12-14 15:12:20,917 INFO L226 Difference]: Without dead ends: 68220 [2021-12-14 15:12:20,972 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 [2021-12-14 15:12:20,973 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 91 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:20,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 330 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68220 states. [2021-12-14 15:12:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68220 to 65282. [2021-12-14 15:12:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65282 states, 65281 states have (on average 1.4230020986198129) internal successors, (92895), 65281 states have internal predecessors, (92895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65282 states to 65282 states and 92895 transitions. [2021-12-14 15:12:24,441 INFO L78 Accepts]: Start accepts. Automaton has 65282 states and 92895 transitions. Word has length 78 [2021-12-14 15:12:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:24,441 INFO L470 AbstractCegarLoop]: Abstraction has 65282 states and 92895 transitions. [2021-12-14 15:12:24,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 65282 states and 92895 transitions. [2021-12-14 15:12:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 15:12:24,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:24,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:12:24,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:12:24,451 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash 440432859, now seen corresponding path program 1 times [2021-12-14 15:12:24,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190589606] [2021-12-14 15:12:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:24,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:24,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:24,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190589606] [2021-12-14 15:12:24,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190589606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:24,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:24,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:24,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789089346] [2021-12-14 15:12:24,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:24,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:24,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:24,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:24,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:24,484 INFO L87 Difference]: Start difference. First operand 65282 states and 92895 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:27,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:27,801 INFO L93 Difference]: Finished difference Result 107337 states and 151812 transitions. [2021-12-14 15:12:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:27,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-14 15:12:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:27,922 INFO L225 Difference]: With dead ends: 107337 [2021-12-14 15:12:27,922 INFO L226 Difference]: Without dead ends: 67827 [2021-12-14 15:12:27,969 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 [2021-12-14 15:12:27,970 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 92 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:27,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 349 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67827 states. [2021-12-14 15:12:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67827 to 64906. [2021-12-14 15:12:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64906 states, 64905 states have (on average 1.3999845928664971) internal successors, (90866), 64905 states have internal predecessors, (90866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64906 states to 64906 states and 90866 transitions. [2021-12-14 15:12:31,542 INFO L78 Accepts]: Start accepts. Automaton has 64906 states and 90866 transitions. Word has length 78 [2021-12-14 15:12:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:31,542 INFO L470 AbstractCegarLoop]: Abstraction has 64906 states and 90866 transitions. [2021-12-14 15:12:31,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 64906 states and 90866 transitions. [2021-12-14 15:12:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 15:12:31,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:31,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:12:31,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:12:31,551 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:31,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:31,552 INFO L85 PathProgramCache]: Analyzing trace with hash -739881820, now seen corresponding path program 1 times [2021-12-14 15:12:31,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:31,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767125789] [2021-12-14 15:12:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:31,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:12:31,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:31,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767125789] [2021-12-14 15:12:31,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767125789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:31,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:31,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:12:31,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693810606] [2021-12-14 15:12:31,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:31,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:12:31,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:12:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:12:31,595 INFO L87 Difference]: Start difference. First operand 64906 states and 90866 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:37,471 INFO L93 Difference]: Finished difference Result 151436 states and 213893 transitions. [2021-12-14 15:12:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:12:37,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 78 [2021-12-14 15:12:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:37,711 INFO L225 Difference]: With dead ends: 151436 [2021-12-14 15:12:37,711 INFO L226 Difference]: Without dead ends: 126470 [2021-12-14 15:12:37,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:12:37,755 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 798 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:37,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 1032 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:37,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126470 states. [2021-12-14 15:12:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126470 to 85301. [2021-12-14 15:12:42,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85301 states, 85300 states have (on average 1.3959906213364595) internal successors, (119078), 85300 states have internal predecessors, (119078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85301 states to 85301 states and 119078 transitions. [2021-12-14 15:12:42,798 INFO L78 Accepts]: Start accepts. Automaton has 85301 states and 119078 transitions. Word has length 78 [2021-12-14 15:12:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:42,798 INFO L470 AbstractCegarLoop]: Abstraction has 85301 states and 119078 transitions. [2021-12-14 15:12:42,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 85301 states and 119078 transitions. [2021-12-14 15:12:42,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 15:12:42,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:42,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:12:42,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 15:12:42,807 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:42,808 INFO L85 PathProgramCache]: Analyzing trace with hash -542796544, now seen corresponding path program 1 times [2021-12-14 15:12:42,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:42,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580496183] [2021-12-14 15:12:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:42,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 15:12:42,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:42,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580496183] [2021-12-14 15:12:42,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580496183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:42,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:42,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:12:42,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260621450] [2021-12-14 15:12:42,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:12:42,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:12:42,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:12:42,848 INFO L87 Difference]: Start difference. First operand 85301 states and 119078 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)