./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/mapsum4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/mapsum4.i -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 d00a4e4676c9051eb624340f361fec0d607bdb13ab2955b117561fab63156730 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:26:58,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:26:58,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:26:58,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:26:58,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:26:58,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:26:58,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:26:58,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:26:58,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:26:58,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:26:58,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:26:58,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:26:58,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:26:58,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:26:58,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:26:58,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:26:58,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:26:58,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:26:58,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:26:58,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:26:58,810 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:26:58,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:26:58,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:26:58,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:26:58,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:26:58,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:26:58,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:26:58,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:26:58,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:26:58,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:26:58,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:26:58,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:26:58,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:26:58,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:26:58,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:26:58,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:26:58,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:26:58,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:26:58,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:26:58,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:26:58,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:26:58,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:26:58,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:26:58,846 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:26:58,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:26:58,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:26:58,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:26:58,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:26:58,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:26:58,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:26:58,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:26:58,849 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:26:58,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:26:58,850 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:26:58,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:26:58,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:26:58,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:26:58,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:26:58,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:26:58,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:26:58,851 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:26:58,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:26:58,851 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:26:58,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:26:58,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:26:58,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:26:58,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:26:58,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:26:58,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:26:58,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:26:58,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:26:58,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:26:58,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:26:58,854 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:26:58,854 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:26:58,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:26:58,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d00a4e4676c9051eb624340f361fec0d607bdb13ab2955b117561fab63156730 [2022-07-13 10:26:59,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:26:59,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:26:59,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:26:59,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:26:59,033 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:26:59,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapsum4.i [2022-07-13 10:26:59,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a39d5d70/a5bd63de525b43958b0c1d4ca28e0b96/FLAG51dc68bc6 [2022-07-13 10:26:59,426 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:26:59,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum4.i [2022-07-13 10:26:59,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a39d5d70/a5bd63de525b43958b0c1d4ca28e0b96/FLAG51dc68bc6 [2022-07-13 10:26:59,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a39d5d70/a5bd63de525b43958b0c1d4ca28e0b96 [2022-07-13 10:26:59,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:26:59,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:26:59,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:26:59,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:26:59,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:26:59,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6253cfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59, skipping insertion in model container [2022-07-13 10:26:59,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:26:59,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:26:59,645 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/array-crafted/mapsum4.i[1318,1331] [2022-07-13 10:26:59,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:26:59,654 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:26:59,678 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/array-crafted/mapsum4.i[1318,1331] [2022-07-13 10:26:59,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:26:59,692 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:26:59,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59 WrapperNode [2022-07-13 10:26:59,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:26:59,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:26:59,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:26:59,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:26:59,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,725 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-13 10:26:59,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:26:59,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:26:59,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:26:59,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:26:59,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:26:59,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:26:59,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:26:59,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:26:59,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (1/1) ... [2022-07-13 10:26:59,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:26:59,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:26:59,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 10:26:59,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 10:26:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:26:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2022-07-13 10:26:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2022-07-13 10:26:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:26:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:26:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:26:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:26:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:26:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:26:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:26:59,877 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:26:59,878 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:26:59,993 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:26:59,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:26:59,998 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 10:26:59,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:26:59 BoogieIcfgContainer [2022-07-13 10:26:59,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:27:00,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:27:00,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:27:00,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:27:00,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:26:59" (1/3) ... [2022-07-13 10:27:00,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9b49ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:27:00, skipping insertion in model container [2022-07-13 10:27:00,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:26:59" (2/3) ... [2022-07-13 10:27:00,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9b49ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:27:00, skipping insertion in model container [2022-07-13 10:27:00,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:26:59" (3/3) ... [2022-07-13 10:27:00,021 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum4.i [2022-07-13 10:27:00,030 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:27:00,031 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:27:00,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:27:00,083 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@12995a2b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57e74fa2 [2022-07-13 10:27:00,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:27:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 10:27:00,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:00,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:00,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2022-07-13 10:27:00,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:00,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743550549] [2022-07-13 10:27:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:00,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:00,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:27:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:00,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 10:27:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:00,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:27:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 10:27:00,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:00,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743550549] [2022-07-13 10:27:00,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743550549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:00,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535279962] [2022-07-13 10:27:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:00,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:00,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:00,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:00,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:27:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:00,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:27:00,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:27:00,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:27:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535279962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:27:00,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:27:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-13 10:27:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404039236] [2022-07-13 10:27:00,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:27:00,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:27:00,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:00,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:27:00,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:27:00,443 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 10:27:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:00,469 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-07-13 10:27:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:27:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-13 10:27:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:00,476 INFO L225 Difference]: With dead ends: 50 [2022-07-13 10:27:00,476 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 10:27:00,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:27:00,484 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:00,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:27:00,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 10:27:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-07-13 10:27:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-13 10:27:00,515 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-07-13 10:27:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:00,516 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-13 10:27:00,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 10:27:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-13 10:27:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 10:27:00,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:00,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:00,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:00,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-13 10:27:00,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2022-07-13 10:27:00,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:00,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981872169] [2022-07-13 10:27:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:00,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:27:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:00,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 10:27:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:00,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:27:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:27:00,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:00,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981872169] [2022-07-13 10:27:00,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981872169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:00,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890634111] [2022-07-13 10:27:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:00,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:00,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:00,834 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:00,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:27:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:00,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:27:00,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:27:00,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:27:00,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890634111] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:27:00,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:27:00,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-13 10:27:00,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665998555] [2022-07-13 10:27:00,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:27:00,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:27:00,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:00,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:27:00,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:27:00,896 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:27:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:00,903 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-07-13 10:27:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:27:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-13 10:27:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:00,905 INFO L225 Difference]: With dead ends: 42 [2022-07-13 10:27:00,905 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 10:27:00,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:27:00,906 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:00,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:27:00,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 10:27:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-13 10:27:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-13 10:27:00,910 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-07-13 10:27:00,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:00,910 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-13 10:27:00,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:27:00,911 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-13 10:27:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 10:27:00,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:00,912 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:00,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:01,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-13 10:27:01,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:01,128 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2022-07-13 10:27:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:01,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001447383] [2022-07-13 10:27:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:01,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:01,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:27:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:01,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 10:27:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:01,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:27:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 10:27:01,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001447383] [2022-07-13 10:27:01,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001447383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571610002] [2022-07-13 10:27:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:01,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:01,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:01,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:01,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:27:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:27:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 10:27:01,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:27:01,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571610002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:27:01,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:27:01,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 10:27:01,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204608453] [2022-07-13 10:27:01,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:27:01,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:27:01,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:01,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:27:01,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:27:01,271 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:27:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:01,279 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-13 10:27:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:27:01,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-13 10:27:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:01,280 INFO L225 Difference]: With dead ends: 39 [2022-07-13 10:27:01,280 INFO L226 Difference]: Without dead ends: 26 [2022-07-13 10:27:01,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:27:01,281 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:01,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:27:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-13 10:27:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-07-13 10:27:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-13 10:27:01,285 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-07-13 10:27:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:01,286 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-13 10:27:01,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:27:01,287 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-13 10:27:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 10:27:01,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:01,288 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:01,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:01,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:01,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2022-07-13 10:27:01,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:01,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107722883] [2022-07-13 10:27:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:01,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:01,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:27:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:01,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 10:27:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:01,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:27:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 10:27:01,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:01,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107722883] [2022-07-13 10:27:01,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107722883] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:01,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597134244] [2022-07-13 10:27:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:01,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:01,593 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:01,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:27:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:01,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:27:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-13 10:27:01,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-13 10:27:01,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597134244] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:01,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:01,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-13 10:27:01,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675351276] [2022-07-13 10:27:01,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:01,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 10:27:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:01,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 10:27:01,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:27:01,741 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:27:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:01,774 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-07-13 10:27:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 10:27:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-07-13 10:27:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:01,775 INFO L225 Difference]: With dead ends: 54 [2022-07-13 10:27:01,775 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 10:27:01,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:27:01,776 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:01,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:27:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 10:27:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-07-13 10:27:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-13 10:27:01,781 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-07-13 10:27:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:01,781 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-13 10:27:01,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:27:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-13 10:27:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 10:27:01,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:01,782 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:01,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 10:27:01,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:01,995 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:01,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:01,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2022-07-13 10:27:01,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:01,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167355202] [2022-07-13 10:27:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:01,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:02,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-13 10:27:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:02,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-13 10:27:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:02,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 10:27:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 10:27:02,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:02,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167355202] [2022-07-13 10:27:02,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167355202] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:02,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940629004] [2022-07-13 10:27:02,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:27:02,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:02,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:02,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:27:02,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:27:02,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:27:02,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-13 10:27:02,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-13 10:27:02,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940629004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:02,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:02,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-13 10:27:02,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660583108] [2022-07-13 10:27:02,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:02,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:27:02,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:02,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:27:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:27:02,330 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:27:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:02,390 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-07-13 10:27:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:27:02,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-07-13 10:27:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:02,391 INFO L225 Difference]: With dead ends: 70 [2022-07-13 10:27:02,391 INFO L226 Difference]: Without dead ends: 48 [2022-07-13 10:27:02,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:27:02,392 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:02,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:27:02,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-13 10:27:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-13 10:27:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-07-13 10:27:02,403 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-07-13 10:27:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:02,404 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-07-13 10:27:02,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:27:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-07-13 10:27:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:27:02,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:02,405 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:02,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:02,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2022-07-13 10:27:02,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:02,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565429145] [2022-07-13 10:27:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:02,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:02,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 10:27:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:02,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 10:27:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:02,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:27:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-13 10:27:02,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:02,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565429145] [2022-07-13 10:27:02,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565429145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:02,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326031273] [2022-07-13 10:27:02,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:27:02,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:02,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:02,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:02,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:27:02,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 10:27:02,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:27:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-13 10:27:02,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-13 10:27:02,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326031273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:02,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:02,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-13 10:27:02,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211919457] [2022-07-13 10:27:02,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:02,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 10:27:02,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:02,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 10:27:02,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:27:02,965 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:03,023 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-07-13 10:27:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 10:27:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-07-13 10:27:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:03,024 INFO L225 Difference]: With dead ends: 82 [2022-07-13 10:27:03,024 INFO L226 Difference]: Without dead ends: 58 [2022-07-13 10:27:03,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:27:03,026 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:03,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:27:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-13 10:27:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-07-13 10:27:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-13 10:27:03,031 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-07-13 10:27:03,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:03,031 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-13 10:27:03,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-13 10:27:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 10:27:03,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:03,033 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:03,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:03,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:03,249 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:03,249 INFO L85 PathProgramCache]: Analyzing trace with hash 161581377, now seen corresponding path program 4 times [2022-07-13 10:27:03,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:03,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308182721] [2022-07-13 10:27:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:03,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:27:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 10:27:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 10:27:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-13 10:27:03,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:03,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308182721] [2022-07-13 10:27:03,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308182721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668556707] [2022-07-13 10:27:03,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:27:03,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:03,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:03,398 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:03,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:27:03,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:27:03,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:03,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:27:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-07-13 10:27:03,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-07-13 10:27:03,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668556707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:03,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:03,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-07-13 10:27:03,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796272930] [2022-07-13 10:27:03,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:03,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:27:03,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:27:03,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:27:03,550 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:03,596 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-13 10:27:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 10:27:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-07-13 10:27:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:03,600 INFO L225 Difference]: With dead ends: 100 [2022-07-13 10:27:03,600 INFO L226 Difference]: Without dead ends: 68 [2022-07-13 10:27:03,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:27:03,603 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:03,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:27:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-13 10:27:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-07-13 10:27:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-07-13 10:27:03,622 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-07-13 10:27:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:03,622 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-07-13 10:27:03,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-07-13 10:27:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-13 10:27:03,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:03,627 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:03,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:03,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:03,845 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:03,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1010910917, now seen corresponding path program 5 times [2022-07-13 10:27:03,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:03,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208226332] [2022-07-13 10:27:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:03,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:27:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 10:27:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-13 10:27:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-07-13 10:27:03,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:03,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208226332] [2022-07-13 10:27:03,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208226332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:03,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038207755] [2022-07-13 10:27:03,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:27:03,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:03,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:03,987 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:04,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:27:04,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-13 10:27:04,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:04,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:27:04,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-07-13 10:27:04,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-13 10:27:04,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038207755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:04,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:04,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-07-13 10:27:04,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274627867] [2022-07-13 10:27:04,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:04,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 10:27:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:04,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 10:27:04,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:27:04,912 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:04,980 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-07-13 10:27:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 10:27:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-07-13 10:27:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:04,981 INFO L225 Difference]: With dead ends: 126 [2022-07-13 10:27:04,982 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 10:27:04,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:27:04,983 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:04,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:27:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 10:27:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-13 10:27:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-07-13 10:27:04,988 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-07-13 10:27:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:04,988 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-07-13 10:27:04,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-07-13 10:27:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-13 10:27:04,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:04,990 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:05,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:05,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-13 10:27:05,201 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1009519917, now seen corresponding path program 6 times [2022-07-13 10:27:05,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:05,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033029491] [2022-07-13 10:27:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:05,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:05,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 10:27:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:05,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 10:27:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:05,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-13 10:27:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-13 10:27:05,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:05,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033029491] [2022-07-13 10:27:05,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033029491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:05,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753268105] [2022-07-13 10:27:05,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:27:05,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:05,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:05,400 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:05,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:27:05,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-13 10:27:05,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:05,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:27:05,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2022-07-13 10:27:05,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-07-13 10:27:05,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753268105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:05,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:05,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-07-13 10:27:05,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608947505] [2022-07-13 10:27:05,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:05,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 10:27:05,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 10:27:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-07-13 10:27:05,827 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:05,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:05,892 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-07-13 10:27:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 10:27:05,892 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-07-13 10:27:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:05,894 INFO L225 Difference]: With dead ends: 160 [2022-07-13 10:27:05,894 INFO L226 Difference]: Without dead ends: 104 [2022-07-13 10:27:05,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-07-13 10:27:05,897 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:05,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:27:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-13 10:27:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-07-13 10:27:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-07-13 10:27:05,911 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2022-07-13 10:27:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:05,911 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-07-13 10:27:05,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-07-13 10:27:05,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-13 10:27:05,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:05,913 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:05,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:06,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:06,126 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash -794036833, now seen corresponding path program 7 times [2022-07-13 10:27:06,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:06,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39301616] [2022-07-13 10:27:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:06,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:06,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 10:27:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:06,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-13 10:27:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:06,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-13 10:27:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:27:06,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:06,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39301616] [2022-07-13 10:27:06,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39301616] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:06,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950400592] [2022-07-13 10:27:06,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:27:06,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:06,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:06,281 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:06,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:27:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 10:27:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:27:06,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:27:06,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950400592] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:06,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:06,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-07-13 10:27:06,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000282371] [2022-07-13 10:27:06,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:06,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 10:27:06,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 10:27:06,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 10:27:06,694 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:27:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:06,754 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2022-07-13 10:27:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 10:27:06,754 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2022-07-13 10:27:06,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:06,755 INFO L225 Difference]: With dead ends: 207 [2022-07-13 10:27:06,755 INFO L226 Difference]: Without dead ends: 135 [2022-07-13 10:27:06,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 10:27:06,756 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:06,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:27:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-13 10:27:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-07-13 10:27:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-07-13 10:27:06,761 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2022-07-13 10:27:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:06,761 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-07-13 10:27:06,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:27:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-07-13 10:27:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-07-13 10:27:06,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:06,763 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:06,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:06,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 10:27:06,977 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:06,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1814541889, now seen corresponding path program 8 times [2022-07-13 10:27:06,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:06,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438290507] [2022-07-13 10:27:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:07,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 10:27:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:07,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 10:27:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:07,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-07-13 10:27:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:27:07,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438290507] [2022-07-13 10:27:07,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438290507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746082609] [2022-07-13 10:27:07,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:27:07,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:07,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:07,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:27:07,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:27:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:07,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 10:27:07,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:27:07,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:27:08,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746082609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:08,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:08,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-07-13 10:27:08,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349938295] [2022-07-13 10:27:08,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:08,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-13 10:27:08,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-13 10:27:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 10:27:08,568 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:27:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:08,688 INFO L93 Difference]: Finished difference Result 271 states and 310 transitions. [2022-07-13 10:27:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-13 10:27:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2022-07-13 10:27:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:08,689 INFO L225 Difference]: With dead ends: 271 [2022-07-13 10:27:08,689 INFO L226 Difference]: Without dead ends: 199 [2022-07-13 10:27:08,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 10:27:08,691 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:08,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 178 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:27:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-13 10:27:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-07-13 10:27:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2022-07-13 10:27:08,696 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 200 [2022-07-13 10:27:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:08,696 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2022-07-13 10:27:08,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:27:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2022-07-13 10:27:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-07-13 10:27:08,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:08,698 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:08,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:08,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 10:27:08,911 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:08,912 INFO L85 PathProgramCache]: Analyzing trace with hash 438792703, now seen corresponding path program 9 times [2022-07-13 10:27:08,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:08,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102711486] [2022-07-13 10:27:08,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:08,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:10,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-13 10:27:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:10,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-07-13 10:27:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:10,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-07-13 10:27:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-13 10:27:10,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102711486] [2022-07-13 10:27:10,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102711486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623201486] [2022-07-13 10:27:10,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:27:10,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:10,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:10,282 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:10,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:27:12,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-13 10:27:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 10:27:12,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2022-07-13 10:27:12,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2022-07-13 10:27:13,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623201486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:13,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:13,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 17, 17] total 95 [2022-07-13 10:27:13,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694818759] [2022-07-13 10:27:13,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:13,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-13 10:27:13,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:13,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-13 10:27:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2022-07-13 10:27:13,172 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:13,389 INFO L93 Difference]: Finished difference Result 306 states and 333 transitions. [2022-07-13 10:27:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-13 10:27:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 264 [2022-07-13 10:27:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:13,390 INFO L225 Difference]: With dead ends: 306 [2022-07-13 10:27:13,390 INFO L226 Difference]: Without dead ends: 234 [2022-07-13 10:27:13,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2022-07-13 10:27:13,392 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:13,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 122 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:27:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-13 10:27:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-07-13 10:27:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2022-07-13 10:27:13,398 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 264 [2022-07-13 10:27:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:13,399 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2022-07-13 10:27:13,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2022-07-13 10:27:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-07-13 10:27:13,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:13,402 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 63, 63, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:13,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:13,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 10:27:13,615 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:13,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:13,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1765547295, now seen corresponding path program 10 times [2022-07-13 10:27:13,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:13,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179802924] [2022-07-13 10:27:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:13,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:14,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-07-13 10:27:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:15,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-07-13 10:27:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:15,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2022-07-13 10:27:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2022-07-13 10:27:15,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:15,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179802924] [2022-07-13 10:27:15,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179802924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:15,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139811150] [2022-07-13 10:27:15,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:27:15,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:15,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:15,029 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:15,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:27:15,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:27:15,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:27:15,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 10:27:15,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:27:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 5591 proven. 900 refuted. 0 times theorem prover too weak. 5969 trivial. 0 not checked. [2022-07-13 10:27:16,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:27:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 1864 proven. 2764 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-07-13 10:27:17,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139811150] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:27:17,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:27:17,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 33, 33] total 128 [2022-07-13 10:27:17,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343665378] [2022-07-13 10:27:17,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:27:17,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-13 10:27:17,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:27:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-13 10:27:17,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2022-07-13 10:27:17,594 INFO L87 Difference]: Start difference. First operand 233 states and 237 transitions. Second operand has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:27:17,869 INFO L93 Difference]: Finished difference Result 404 states and 447 transitions. [2022-07-13 10:27:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-07-13 10:27:17,869 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 362 [2022-07-13 10:27:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:27:17,871 INFO L225 Difference]: With dead ends: 404 [2022-07-13 10:27:17,871 INFO L226 Difference]: Without dead ends: 300 [2022-07-13 10:27:17,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2022-07-13 10:27:17,875 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:27:17,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 202 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:27:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-13 10:27:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-07-13 10:27:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:27:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2022-07-13 10:27:17,882 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 362 [2022-07-13 10:27:17,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:27:17,882 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2022-07-13 10:27:17,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:27:17,882 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2022-07-13 10:27:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-07-13 10:27:17,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:27:17,888 INFO L195 NwaCegarLoop]: trace histogram [186, 186, 64, 64, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:27:17,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:27:18,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 10:27:18,105 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:27:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:27:18,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1972129571, now seen corresponding path program 11 times [2022-07-13 10:27:18,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:27:18,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077037956] [2022-07-13 10:27:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:27:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:27:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:19,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-13 10:27:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:19,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-07-13 10:27:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:19,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2022-07-13 10:27:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:27:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 39275 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 35179 trivial. 0 not checked. [2022-07-13 10:27:19,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:27:19,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077037956] [2022-07-13 10:27:19,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077037956] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:27:19,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60490765] [2022-07-13 10:27:19,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:27:19,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:27:19,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:27:19,463 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:27:19,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process